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-rw-r--r--drivers/leds/Kconfig12
-rw-r--r--drivers/leds/Makefile1
-rw-r--r--drivers/leds/leds-88pm860x.c5
-rw-r--r--drivers/leds/leds-lm3530.c58
-rw-r--r--drivers/leds/leds-lm355x.c2
-rw-r--r--drivers/leds/leds-lm3642.c4
-rw-r--r--drivers/leds/leds-lp5521.c944
-rw-r--r--drivers/leds/leds-lp5523.c1050
-rw-r--r--drivers/leds/leds-lp55xx-common.c523
-rw-r--r--drivers/leds/leds-lp55xx-common.h134
-rw-r--r--drivers/leds/leds-lp8788.c9
-rw-r--r--drivers/leds/leds-pca9532.c6
-rw-r--r--drivers/leds/leds-pwm.c152
-rw-r--r--drivers/leds/leds-renesas-tpu.c12
-rw-r--r--drivers/leds/leds-ss4200.c3
-rw-r--r--drivers/leds/leds-sunfire.c19
-rw-r--r--drivers/leds/leds-tca6507.c72
-rw-r--r--drivers/leds/leds-wm831x-status.c2
-rw-r--r--drivers/pwm/core.c38
19 files changed, 1473 insertions, 1573 deletions
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index 4469b441b785..ec50824c02ec 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -193,9 +193,18 @@ config LEDS_LP3944
To compile this driver as a module, choose M here: the
module will be called leds-lp3944.
+config LEDS_LP55XX_COMMON
+ tristate "Common Driver for TI/National LP5521 and LP5523/55231"
+ depends on LEDS_LP5521 || LEDS_LP5523
+ select FW_LOADER
+ help
+ This option supports common operations for LP5521 and LP5523/55231
+ devices.
+
config LEDS_LP5521
tristate "LED Support for N.S. LP5521 LED driver chip"
depends on LEDS_CLASS && I2C
+ select LEDS_LP55XX_COMMON
help
If you say yes here you get support for the National Semiconductor
LP5521 LED driver. It is 3 channel chip with programmable engines.
@@ -205,6 +214,7 @@ config LEDS_LP5521
config LEDS_LP5523
tristate "LED Support for TI/National LP5523/55231 LED driver chip"
depends on LEDS_CLASS && I2C
+ select LEDS_LP55XX_COMMON
help
If you say yes here you get support for TI/National Semiconductor
LP5523/55231 LED driver.
@@ -310,7 +320,7 @@ config LEDS_DAC124S085
config LEDS_PWM
tristate "PWM driven LED Support"
depends on LEDS_CLASS
- depends on HAVE_PWM
+ depends on PWM
help
This option enables support for pwm driven LEDs
diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
index 3fb9641b6194..215e7e3b6173 100644
--- a/drivers/leds/Makefile
+++ b/drivers/leds/Makefile
@@ -23,6 +23,7 @@ obj-$(CONFIG_LEDS_PCA9532) += leds-pca9532.o
obj-$(CONFIG_LEDS_GPIO_REGISTER) += leds-gpio-register.o
obj-$(CONFIG_LEDS_GPIO) += leds-gpio.o
obj-$(CONFIG_LEDS_LP3944) += leds-lp3944.o
+obj-$(CONFIG_LEDS_LP55XX_COMMON) += leds-lp55xx-common.o
obj-$(CONFIG_LEDS_LP5521) += leds-lp5521.o
obj-$(CONFIG_LEDS_LP5523) += leds-lp5523.o
obj-$(CONFIG_LEDS_LP8788) += leds-lp8788.o
diff --git a/drivers/leds/leds-88pm860x.c b/drivers/leds/leds-88pm860x.c
index 6be2edd41173..f5b9ea315790 100644
--- a/drivers/leds/leds-88pm860x.c
+++ b/drivers/leds/leds-88pm860x.c
@@ -128,8 +128,10 @@ static void pm860x_led_set(struct led_classdev *cdev,
static int pm860x_led_dt_init(struct platform_device *pdev,
struct pm860x_led *data)
{
- struct device_node *nproot = pdev->dev.parent->of_node, *np;
+ struct device_node *nproot, *np;
int iset = 0;
+
+ nproot = of_node_get(pdev->dev.parent->of_node);
if (!nproot)
return -ENODEV;
nproot = of_find_node_by_name(nproot, "leds");
@@ -145,6 +147,7 @@ static int pm860x_led_dt_init(struct platform_device *pdev,
break;
}
}
+ of_node_put(nproot);
return 0;
}
#else
diff --git a/drivers/leds/leds-lm3530.c b/drivers/leds/leds-lm3530.c
index 214145483836..a036a19040fe 100644
--- a/drivers/leds/leds-lm3530.c
+++ b/drivers/leds/leds-lm3530.c
@@ -187,6 +187,40 @@ static void lm3530_als_configure(struct lm3530_platform_data *pdata,
(pdata->als2_resistor_sel << LM3530_ALS2_IMP_SHIFT);
}
+static int lm3530_led_enable(struct lm3530_data *drvdata)
+{
+ int ret;
+
+ if (drvdata->enable)
+ return 0;
+
+ ret = regulator_enable(drvdata->regulator);
+ if (ret) {
+ dev_err(drvdata->led_dev.dev, "Failed to enable vin:%d\n", ret);
+ return ret;
+ }
+
+ drvdata->enable = true;
+ return 0;
+}
+
+static void lm3530_led_disable(struct lm3530_data *drvdata)
+{
+ int ret;
+
+ if (!drvdata->enable)
+ return;
+
+ ret = regulator_disable(drvdata->regulator);
+ if (ret) {
+ dev_err(drvdata->led_dev.dev, "Failed to disable vin:%d\n",
+ ret);
+ return;
+ }
+
+ drvdata->enable = false;
+}
+
static int lm3530_init_registers(struct lm3530_data *drvdata)
{
int ret = 0;
@@ -245,15 +279,9 @@ static int lm3530_init_registers(struct lm3530_data *drvdata)
reg_val[12] = LM3530_DEF_ZT_3; /* LM3530_ALS_Z3T_REG */
reg_val[13] = LM3530_DEF_ZT_4; /* LM3530_ALS_Z4T_REG */
- if (!drvdata->enable) {
- ret = regulator_enable(drvdata->regulator);
- if (ret) {
- dev_err(&drvdata->client->dev,
- "Enable regulator failed\n");
- return ret;
- }
- drvdata->enable = true;
- }
+ ret = lm3530_led_enable(drvdata);
+ if (ret)
+ return ret;
for (i = 0; i < LM3530_REG_MAX; i++) {
/* do not update brightness register when pwm mode */
@@ -305,13 +333,8 @@ static void lm3530_brightness_set(struct led_classdev *led_cdev,
else
drvdata->brightness = brt_val;
- if (brt_val == 0) {
- err = regulator_disable(drvdata->regulator);
- if (err)
- dev_err(&drvdata->client->dev,
- "Disable regulator failed\n");
- drvdata->enable = false;
- }
+ if (brt_val == 0)
+ lm3530_led_disable(drvdata);
break;
case LM3530_BL_MODE_ALS:
break;
@@ -458,8 +481,7 @@ static int lm3530_remove(struct i2c_client *client)
device_remove_file(drvdata->led_dev.dev, &dev_attr_mode);
- if (drvdata->enable)
- regulator_disable(drvdata->regulator);
+ lm3530_led_disable(drvdata);
led_classdev_unregister(&drvdata->led_dev);
return 0;
}
diff --git a/drivers/leds/leds-lm355x.c b/drivers/leds/leds-lm355x.c
index 65d79284c488..4117235ba618 100644
--- a/drivers/leds/leds-lm355x.c
+++ b/drivers/leds/leds-lm355x.c
@@ -380,7 +380,7 @@ static void lm355x_indicator_brightness_set(struct led_classdev *cdev,
/* indicator pattern only for lm3556*/
static ssize_t lm3556_indicator_pattern_store(struct device *dev,
- struct device_attribute *devAttr,
+ struct device_attribute *attr,
const char *buf, size_t size)
{
ssize_t ret;
diff --git a/drivers/leds/leds-lm3642.c b/drivers/leds/leds-lm3642.c
index 07b3dde90613..9f428d9dfe91 100644
--- a/drivers/leds/leds-lm3642.c
+++ b/drivers/leds/leds-lm3642.c
@@ -176,7 +176,7 @@ out:
/* torch pin config for lm3642*/
static ssize_t lm3642_torch_pin_store(struct device *dev,
- struct device_attribute *devAttr,
+ struct device_attribute *attr,
const char *buf, size_t size)
{
ssize_t ret;
@@ -233,7 +233,7 @@ static void lm3642_torch_brightness_set(struct led_classdev *cdev,
/* strobe pin config for lm3642*/
static ssize_t lm3642_strobe_pin_store(struct device *dev,
- struct device_attribute *devAttr,
+ struct device_attribute *attr,
const char *buf, size_t size)
{
ssize_t ret;
diff --git a/drivers/leds/leds-lp5521.c b/drivers/leds/leds-lp5521.c
index cb8a5220200b..1001347ba70b 100644
--- a/drivers/leds/leds-lp5521.c
+++ b/drivers/leds/leds-lp5521.c
@@ -2,8 +2,10 @@
* LP5521 LED chip driver.
*
* Copyright (C) 2010 Nokia Corporation
+ * Copyright (C) 2012 Texas Instruments
*
* Contact: Samu Onkalo <samu.p.onkalo@nokia.com>
+ * Milo(Woogyom) Kim <milo.kim@ti.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
@@ -20,33 +22,21 @@
* 02110-1301 USA
*/
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/i2c.h>
-#include <linux/mutex.h>
-#include <linux/gpio.h>
-#include <linux/interrupt.h>
#include <linux/delay.h>
-#include <linux/ctype.h>
-#include <linux/spinlock.h>
-#include <linux/wait.h>
+#include <linux/firmware.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
#include <linux/leds.h>
-#include <linux/leds-lp5521.h>
-#include <linux/workqueue.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/platform_data/leds-lp55xx.h>
#include <linux/slab.h>
-#define LP5521_PROGRAM_LENGTH 32 /* in bytes */
-
-#define LP5521_MAX_LEDS 3 /* Maximum number of LEDs */
-#define LP5521_MAX_ENGINES 3 /* Maximum number of engines */
-
-#define LP5521_ENG_MASK_BASE 0x30 /* 00110000 */
-#define LP5521_ENG_STATUS_MASK 0x07 /* 00000111 */
+#include "leds-lp55xx-common.h"
-#define LP5521_CMD_LOAD 0x15 /* 00010101 */
-#define LP5521_CMD_RUN 0x2a /* 00101010 */
-#define LP5521_CMD_DIRECT 0x3f /* 00111111 */
-#define LP5521_CMD_DISABLED 0x00 /* 00000000 */
+#define LP5521_PROGRAM_LENGTH 32
+#define LP5521_MAX_LEDS 3
+#define LP5521_CMD_DIRECT 0x3F
/* Registers */
#define LP5521_REG_ENABLE 0x00
@@ -58,22 +48,14 @@
#define LP5521_REG_G_CURRENT 0x06
#define LP5521_REG_B_CURRENT 0x07
#define LP5521_REG_CONFIG 0x08
-#define LP5521_REG_R_CHANNEL_PC 0x09
-#define LP5521_REG_G_CHANNEL_PC 0x0A
-#define LP5521_REG_B_CHANNEL_PC 0x0B
#define LP5521_REG_STATUS 0x0C
#define LP5521_REG_RESET 0x0D
-#define LP5521_REG_GPO 0x0E
#define LP5521_REG_R_PROG_MEM 0x10
#define LP5521_REG_G_PROG_MEM 0x30
#define LP5521_REG_B_PROG_MEM 0x50
-#define LP5521_PROG_MEM_BASE LP5521_REG_R_PROG_MEM
-#define LP5521_PROG_MEM_SIZE 0x20
-
/* Base register to set LED current */
#define LP5521_REG_LED_CURRENT_BASE LP5521_REG_R_CURRENT
-
/* Base register to set the brightness */
#define LP5521_REG_LED_PWM_BASE LP5521_REG_R_PWM
@@ -92,440 +74,287 @@
/* default R channel current register value */
#define LP5521_REG_R_CURR_DEFAULT 0xAF
-/* Pattern Mode */
-#define PATTERN_OFF 0
+/* Reset register value */
+#define LP5521_RESET 0xFF
-struct lp5521_engine {
- int id;
- u8 mode;
- u8 prog_page;
- u8 engine_mask;
-};
+/* Program Memory Operations */
+#define LP5521_MODE_R_M 0x30 /* Operation Mode Register */
+#define LP5521_MODE_G_M 0x0C
+#define LP5521_MODE_B_M 0x03
+#define LP5521_LOAD_R 0x10
+#define LP5521_LOAD_G 0x04
+#define LP5521_LOAD_B 0x01
-struct lp5521_led {
- int id;
- u8 chan_nr;
- u8 led_current;
- u8 max_current;
- struct led_classdev cdev;
- struct work_struct brightness_work;
- u8 brightness;
-};
+#define LP5521_R_IS_LOADING(mode) \
+ ((mode & LP5521_MODE_R_M) == LP5521_LOAD_R)
+#define LP5521_G_IS_LOADING(mode) \
+ ((mode & LP5521_MODE_G_M) == LP5521_LOAD_G)
+#define LP5521_B_IS_LOADING(mode) \
+ ((mode & LP5521_MODE_B_M) == LP5521_LOAD_B)
-struct lp5521_chip {
- struct lp5521_platform_data *pdata;
- struct mutex lock; /* Serialize control */
- struct i2c_client *client;
- struct lp5521_engine engines[LP5521_MAX_ENGINES];
- struct lp5521_led leds[LP5521_MAX_LEDS];
- u8 num_channels;
- u8 num_leds;
-};
+#define LP5521_EXEC_R_M 0x30 /* Enable Register */
+#define LP5521_EXEC_G_M 0x0C
+#define LP5521_EXEC_B_M 0x03
+#define LP5521_EXEC_M 0x3F
+#define LP5521_RUN_R 0x20
+#define LP5521_RUN_G 0x08
+#define LP5521_RUN_B 0x02
-static inline struct lp5521_led *cdev_to_led(struct led_classdev *cdev)
+static inline void lp5521_wait_opmode_done(void)
{
- return container_of(cdev, struct lp5521_led, cdev);
+ /* operation mode change needs to be longer than 153 us */
+ usleep_range(200, 300);
}
-static inline struct lp5521_chip *engine_to_lp5521(struct lp5521_engine *engine)
+static inline void lp5521_wait_enable_done(void)
{
- return container_of(engine, struct lp5521_chip,
- engines[engine->id - 1]);
+ /* it takes more 488 us to update ENABLE register */
+ usleep_range(500, 600);
}
-static inline struct lp5521_chip *led_to_lp5521(struct lp5521_led *led)
+static void lp5521_set_led_current(struct lp55xx_led *led, u8 led_current)
{
- return container_of(led, struct lp5521_chip,
- leds[led->id]);
+ led->led_current = led_current;
+ lp55xx_write(led->chip, LP5521_REG_LED_CURRENT_BASE + led->chan_nr,
+ led_current);
}
-static void lp5521_led_brightness_work(struct work_struct *work);
-
-static inline int lp5521_write(struct i2c_client *client, u8 reg, u8 value)
+static void lp5521_load_engine(struct lp55xx_chip *chip)
{
- return i2c_smbus_write_byte_data(client, reg, value);
-}
+ enum lp55xx_engine_index idx = chip->engine_idx;
+ u8 mask[] = {
+ [LP55XX_ENGINE_1] = LP5521_MODE_R_M,
+ [LP55XX_ENGINE_2] = LP5521_MODE_G_M,
+ [LP55XX_ENGINE_3] = LP5521_MODE_B_M,
+ };
-static int lp5521_read(struct i2c_client *client, u8 reg, u8 *buf)
-{
- s32 ret;
+ u8 val[] = {
+ [LP55XX_ENGINE_1] = LP5521_LOAD_R,
+ [LP55XX_ENGINE_2] = LP5521_LOAD_G,
+ [LP55XX_ENGINE_3] = LP5521_LOAD_B,
+ };
- ret = i2c_smbus_read_byte_data(client, reg);
- if (ret < 0)
- return ret;
+ lp55xx_update_bits(chip, LP5521_REG_OP_MODE, mask[idx], val[idx]);
- *buf = ret;
- return 0;
+ lp5521_wait_opmode_done();
}
-static int lp5521_set_engine_mode(struct lp5521_engine *engine, u8 mode)
+static void lp5521_stop_engine(struct lp55xx_chip *chip)
{
- struct lp5521_chip *chip = engine_to_lp5521(engine);
- struct i2c_client *client = chip->client;
- int ret;
- u8 engine_state;
-
- /* Only transition between RUN and DIRECT mode are handled here */
- if (mode == LP5521_CMD_LOAD)
- return 0;
-
- if (mode == LP5521_CMD_DISABLED)
- mode = LP5521_CMD_DIRECT;
-
- ret = lp5521_read(client, LP5521_REG_OP_MODE, &engine_state);
- if (ret < 0)
- return ret;
-
- /* set mode only for this engine */
- engine_state &= ~(engine->engine_mask);
- mode &= engine->engine_mask;
- engine_state |= mode;
- return lp5521_write(client, LP5521_REG_OP_MODE, engine_state);
+ lp55xx_write(chip, LP5521_REG_OP_MODE, 0);
+ lp5521_wait_opmode_done();
}
-static int lp5521_load_program(struct lp5521_engine *eng, const u8 *pattern)
+static void lp5521_run_engine(struct lp55xx_chip *chip, bool start)
{
- struct lp5521_chip *chip = engine_to_lp5521(eng);
- struct i2c_client *client = chip->client;
int ret;
- int addr;
u8 mode;
+ u8 exec;
- /* move current engine to direct mode and remember the state */
- ret = lp5521_set_engine_mode(eng, LP5521_CMD_DIRECT);
- if (ret)
- return ret;
-
- /* Mode change requires min 500 us delay. 1 - 2 ms with margin */
- usleep_range(1000, 2000);
- ret = lp5521_read(client, LP5521_REG_OP_MODE, &mode);
- if (ret)
- return ret;
-
- /* For loading, all the engines to load mode */
- lp5521_write(client, LP5521_REG_OP_MODE, LP5521_CMD_DIRECT);
- /* Mode change requires min 500 us delay. 1 - 2 ms with margin */
- usleep_range(1000, 2000);
- lp5521_write(client, LP5521_REG_OP_MODE, LP5521_CMD_LOAD);
- /* Mode change requires min 500 us delay. 1 - 2 ms with margin */
- usleep_range(1000, 2000);
-
- addr = LP5521_PROG_MEM_BASE + eng->prog_page * LP5521_PROG_MEM_SIZE;
- i2c_smbus_write_i2c_block_data(client,
- addr,
- LP5521_PROG_MEM_SIZE,
- pattern);
-
- return lp5521_write(client, LP5521_REG_OP_MODE, mode);
-}
-
-static int lp5521_set_led_current(struct lp5521_chip *chip, int led, u8 curr)
-{
- return lp5521_write(chip->client,
- LP5521_REG_LED_CURRENT_BASE + chip->leds[led].chan_nr,
- curr);
-}
-
-static void lp5521_init_engine(struct lp5521_chip *chip)
-{
- int i;
- for (i = 0; i < ARRAY_SIZE(chip->engines); i++) {
- chip->engines[i].id = i + 1;
- chip->engines[i].engine_mask = LP5521_ENG_MASK_BASE >> (i * 2);
- chip->engines[i].prog_page = i;
+ /* stop engine */
+ if (!start) {
+ lp5521_stop_engine(chip);
+ lp55xx_write(chip, LP5521_REG_OP_MODE, LP5521_CMD_DIRECT);
+ lp5521_wait_opmode_done();
+ return;
}
-}
-
-static int lp5521_configure(struct i2c_client *client)
-{
- struct lp5521_chip *chip = i2c_get_clientdata(client);
- int ret;
- u8 cfg;
-
- lp5521_init_engine(chip);
-
- /* Set all PWMs to direct control mode */
- ret = lp5521_write(client, LP5521_REG_OP_MODE, LP5521_CMD_DIRECT);
-
- cfg = chip->pdata->update_config ?
- : (LP5521_PWRSAVE_EN | LP5521_CP_MODE_AUTO | LP5521_R_TO_BATT);
- ret |= lp5521_write(client, LP5521_REG_CONFIG, cfg);
-
- /* Initialize all channels PWM to zero -> leds off */
- ret |= lp5521_write(client, LP5521_REG_R_PWM, 0);
- ret |= lp5521_write(client, LP5521_REG_G_PWM, 0);
- ret |= lp5521_write(client, LP5521_REG_B_PWM, 0);
-
- /* Set engines are set to run state when OP_MODE enables engines */
- ret |= lp5521_write(client, LP5521_REG_ENABLE,
- LP5521_ENABLE_RUN_PROGRAM);
- /* enable takes 500us. 1 - 2 ms leaves some margin */
- usleep_range(1000, 2000);
-
- return ret;
-}
-
-static int lp5521_run_selftest(struct lp5521_chip *chip, char *buf)
-{
- int ret;
- u8 status;
-
- ret = lp5521_read(chip->client, LP5521_REG_STATUS, &status);
- if (ret < 0)
- return ret;
-
- /* Check that ext clock is really in use if requested */
- if (chip->pdata && chip->pdata->clock_mode == LP5521_CLOCK_EXT)
- if ((status & LP5521_EXT_CLK_USED) == 0)
- return -EIO;
- return 0;
-}
-
-static void lp5521_set_brightness(struct led_classdev *cdev,
- enum led_brightness brightness)
-{
- struct lp5521_led *led = cdev_to_led(cdev);
- led->brightness = (u8)brightness;
- schedule_work(&led->brightness_work);
-}
-
-static void lp5521_led_brightness_work(struct work_struct *work)
-{
- struct lp5521_led *led = container_of(work,
- struct lp5521_led,
- brightness_work);
- struct lp5521_chip *chip = led_to_lp5521(led);
- struct i2c_client *client = chip->client;
- mutex_lock(&chip->lock);
- lp5521_write(client, LP5521_REG_LED_PWM_BASE + led->chan_nr,
- led->brightness);
- mutex_unlock(&chip->lock);
-}
-
-/* Detect the chip by setting its ENABLE register and reading it back. */
-static int lp5521_detect(struct i2c_client *client)
-{
- int ret;
- u8 buf;
+ /*
+ * To run the engine,
+ * operation mode and enable register should updated at the same time
+ */
- ret = lp5521_write(client, LP5521_REG_ENABLE, LP5521_ENABLE_DEFAULT);
+ ret = lp55xx_read(chip, LP5521_REG_OP_MODE, &mode);
if (ret)
- return ret;
- /* enable takes 500us. 1 - 2 ms leaves some margin */
- usleep_range(1000, 2000);
- ret = lp5521_read(client, LP5521_REG_ENABLE, &buf);
- if (ret)
- return ret;
- if (buf != LP5521_ENABLE_DEFAULT)
- return -ENODEV;
+ return;
- return 0;
-}
+ ret = lp55xx_read(chip, LP5521_REG_ENABLE, &exec);
+ if (ret)
+ return;
-/* Set engine mode and create appropriate sysfs attributes, if required. */
-static int lp5521_set_mode(struct lp5521_engine *engine, u8 mode)
-{
- int ret = 0;
+ /* change operation mode to RUN only when each engine is loading */
+ if (LP5521_R_IS_LOADING(mode)) {
+ mode = (mode & ~LP5521_MODE_R_M) | LP5521_RUN_R;
+ exec = (exec & ~LP5521_EXEC_R_M) | LP5521_RUN_R;
+ }
- /* if in that mode already do nothing, except for run */
- if (mode == engine->mode && mode != LP5521_CMD_RUN)
- return 0;
+ if (LP5521_G_IS_LOADING(mode)) {
+ mode = (mode & ~LP5521_MODE_G_M) | LP5521_RUN_G;
+ exec = (exec & ~LP5521_EXEC_G_M) | LP5521_RUN_G;
+ }
- if (mode == LP5521_CMD_RUN) {
- ret = lp5521_set_engine_mode(engine, LP5521_CMD_RUN);
- } else if (mode == LP5521_CMD_LOAD) {
- lp5521_set_engine_mode(engine, LP5521_CMD_DISABLED);
- lp5521_set_engine_mode(engine, LP5521_CMD_LOAD);
- } else if (mode == LP5521_CMD_DISABLED) {
- lp5521_set_engine_mode(engine, LP5521_CMD_DISABLED);
+ if (LP5521_B_IS_LOADING(mode)) {
+ mode = (mode & ~LP5521_MODE_B_M) | LP5521_RUN_B;
+ exec = (exec & ~LP5521_EXEC_B_M) | LP5521_RUN_B;
}
- engine->mode = mode;
+ lp55xx_write(chip, LP5521_REG_OP_MODE, mode);
+ lp5521_wait_opmode_done();
- return ret;
+ lp55xx_update_bits(chip, LP5521_REG_ENABLE, LP5521_EXEC_M, exec);
+ lp5521_wait_enable_done();
}
-static int lp5521_do_store_load(struct lp5521_engine *engine,
- const char *buf, size_t len)
+static int lp5521_update_program_memory(struct lp55xx_chip *chip,
+ const u8 *data, size_t size)
{
- struct lp5521_chip *chip = engine_to_lp5521(engine);
- struct i2c_client *client = chip->client;
- int ret, nrchars, offset = 0, i = 0;
- char c[3];
- unsigned cmd;
+ enum lp55xx_engine_index idx = chip->engine_idx;
u8 pattern[LP5521_PROGRAM_LENGTH] = {0};
+ u8 addr[] = {
+ [LP55XX_ENGINE_1] = LP5521_REG_R_PROG_MEM,
+ [LP55XX_ENGINE_2] = LP5521_REG_G_PROG_MEM,
+ [LP55XX_ENGINE_3] = LP5521_REG_B_PROG_MEM,
+ };
+ unsigned cmd;
+ char c[3];
+ int program_size;
+ int nrchars;
+ int offset = 0;
+ int ret;
+ int i;
- while ((offset < len - 1) && (i < LP5521_PROGRAM_LENGTH)) {
+ /* clear program memory before updating */
+ for (i = 0; i < LP5521_PROGRAM_LENGTH; i++)
+ lp55xx_write(chip, addr[idx] + i, 0);
+
+ i = 0;
+ while ((offset < size - 1) && (i < LP5521_PROGRAM_LENGTH)) {
/* separate sscanfs because length is working only for %s */
- ret = sscanf(buf + offset, "%2s%n ", c, &nrchars);
- if (ret != 2)
- goto fail;
+ ret = sscanf(data + offset, "%2s%n ", c, &nrchars);
+ if (ret != 1)
+ goto err;
+
ret = sscanf(c, "%2x", &cmd);
if (ret != 1)
- goto fail;
- pattern[i] = (u8)cmd;
+ goto err;
+ pattern[i] = (u8)cmd;
offset += nrchars;
i++;
}
/* Each instruction is 16bit long. Check that length is even */
if (i % 2)
- goto fail;
+ goto err;
- mutex_lock(&chip->lock);
- if (engine->mode == LP5521_CMD_LOAD)
- ret = lp5521_load_program(engine, pattern);
- else
- ret = -EINVAL;
- mutex_unlock(&chip->lock);
+ program_size = i;
+ for (i = 0; i < program_size; i++)
+ lp55xx_write(chip, addr[idx] + i, pattern[i]);
- if (ret) {
- dev_err(&client->dev, "failed loading pattern\n");
- return ret;
- }
+ return 0;
- return len;
-fail:
- dev_err(&client->dev, "wrong pattern format\n");
+err:
+ dev_err(&chip->cl->dev, "wrong pattern format\n");
return -EINVAL;
}
-static ssize_t store_engine_load(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len, int nr)
+static void lp5521_firmware_loaded(struct lp55xx_chip *chip)
{
- struct i2c_client *client = to_i2c_client(dev);
- struct lp5521_chip *chip = i2c_get_clientdata(client);
- return lp5521_do_store_load(&chip->engines[nr - 1], buf, len);
-}
+ const struct firmware *fw = chip->fw;
-#define store_load(nr) \
-static ssize_t store_engine##nr##_load(struct device *dev, \
- struct device_attribute *attr, \
- const char *buf, size_t len) \
-{ \
- return store_engine_load(dev, attr, buf, len, nr); \
-}
-store_load(1)
-store_load(2)
-store_load(3)
-
-static ssize_t show_engine_mode(struct device *dev,
- struct device_attribute *attr,
- char *buf, int nr)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct lp5521_chip *chip = i2c_get_clientdata(client);
- switch (chip->engines[nr - 1].mode) {
- case LP5521_CMD_RUN:
- return sprintf(buf, "run\n");
- case LP5521_CMD_LOAD:
- return sprintf(buf, "load\n");
- case LP5521_CMD_DISABLED:
- return sprintf(buf, "disabled\n");
- default:
- return sprintf(buf, "disabled\n");
+ if (fw->size > LP5521_PROGRAM_LENGTH) {
+ dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n",
+ fw->size);
+ return;
}
-}
-#define show_mode(nr) \
-static ssize_t show_engine##nr##_mode(struct device *dev, \
- struct device_attribute *attr, \
- char *buf) \
-{ \
- return show_engine_mode(dev, attr, buf, nr); \
+ /*
+ * Program momery sequence
+ * 1) set engine mode to "LOAD"
+ * 2) write firmware data into program memory
+ */
+
+ lp5521_load_engine(chip);
+ lp5521_update_program_memory(chip, fw->data, fw->size);
}
-show_mode(1)
-show_mode(2)
-show_mode(3)
-static ssize_t store_engine_mode(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len, int nr)
+static int lp5521_post_init_device(struct lp55xx_chip *chip)
{
- struct i2c_client *client = to_i2c_client(dev);
- struct lp5521_chip *chip = i2c_get_clientdata(client);
- struct lp5521_engine *engine = &chip->engines[nr - 1];
- mutex_lock(&chip->lock);
+ int ret;
+ u8 val;
- if (!strncmp(buf, "run", 3))
- lp5521_set_mode(engine, LP5521_CMD_RUN);
- else if (!strncmp(buf, "load", 4))
- lp5521_set_mode(engine, LP5521_CMD_LOAD);
- else if (!strncmp(buf, "disabled", 8))
- lp5521_set_mode(engine, LP5521_CMD_DISABLED);
+ /*
+ * Make sure that the chip is reset by reading back the r channel
+ * current reg. This is dummy read is required on some platforms -
+ * otherwise further access to the R G B channels in the
+ * LP5521_REG_ENABLE register will not have any effect - strange!
+ */
+ ret = lp55xx_read(chip, LP5521_REG_R_CURRENT, &val);
+ if (ret) {
+ dev_err(&chip->cl->dev, "error in resetting chip\n");
+ return ret;
+ }
+ if (val != LP5521_REG_R_CURR_DEFAULT) {
+ dev_err(&chip->cl->dev,
+ "unexpected data in register (expected 0x%x got 0x%x)\n",
+ LP5521_REG_R_CURR_DEFAULT, val);
+ ret = -EINVAL;
+ return ret;
+ }
+ usleep_range(10000, 20000);
- mutex_unlock(&chip->lock);
- return len;
-}
+ /* Set all PWMs to direct control mode */
+ ret = lp55xx_write(chip, LP5521_REG_OP_MODE, LP5521_CMD_DIRECT);
-#define store_mode(nr) \
-static ssize_t store_engine##nr##_mode(struct device *dev, \
- struct device_attribute *attr, \
- const char *buf, size_t len) \
-{ \
- return store_engine_mode(dev, attr, buf, len, nr); \
-}
-store_mode(1)
-store_mode(2)
-store_mode(3)
+ val = chip->pdata->update_config ?
+ : (LP5521_PWRSAVE_EN | LP5521_CP_MODE_AUTO | LP5521_R_TO_BATT);
+ ret = lp55xx_write(chip, LP5521_REG_CONFIG, val);
+ if (ret)
+ return ret;
-static ssize_t show_max_current(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct led_classdev *led_cdev = dev_get_drvdata(dev);
- struct lp5521_led *led = cdev_to_led(led_cdev);
+ /* Initialize all channels PWM to zero -> leds off */
+ lp55xx_write(chip, LP5521_REG_R_PWM, 0);
+ lp55xx_write(chip, LP5521_REG_G_PWM, 0);
+ lp55xx_write(chip, LP5521_REG_B_PWM, 0);
- return sprintf(buf, "%d\n", led->max_current);
-}
+ /* Set engines are set to run state when OP_MODE enables engines */
+ ret = lp55xx_write(chip, LP5521_REG_ENABLE, LP5521_ENABLE_RUN_PROGRAM);
+ if (ret)
+ return ret;
-static ssize_t show_current(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct led_classdev *led_cdev = dev_get_drvdata(dev);
- struct lp5521_led *led = cdev_to_led(led_cdev);
+ lp5521_wait_enable_done();
- return sprintf(buf, "%d\n", led->led_current);
+ return 0;
}
-static ssize_t store_current(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len)
+static int lp5521_run_selftest(struct lp55xx_chip *chip, char *buf)
{
- struct led_classdev *led_cdev = dev_get_drvdata(dev);
- struct lp5521_led *led = cdev_to_led(led_cdev);
- struct lp5521_chip *chip = led_to_lp5521(led);
- ssize_t ret;
- unsigned long curr;
+ struct lp55xx_platform_data *pdata = chip->pdata;
+ int ret;
+ u8 status;
- if (kstrtoul(buf, 0, &curr))
- return -EINVAL;
+ ret = lp55xx_read(chip, LP5521_REG_STATUS, &status);
+ if (ret < 0)
+ return ret;
- if (curr > led->max_current)
- return -EINVAL;
+ if (pdata->clock_mode != LP55XX_CLOCK_EXT)
+ return 0;
- mutex_lock(&chip->lock);
- ret = lp5521_set_led_current(chip, led->id, curr);
- mutex_unlock(&chip->lock);
+ /* Check that ext clock is really in use if requested */
+ if ((status & LP5521_EXT_CLK_USED) == 0)
+ return -EIO;
- if (ret < 0)
- return ret;
+ return 0;
+}
- led->led_current = (u8)curr;
+static void lp5521_led_brightness_work(struct work_struct *work)
+{
+ struct lp55xx_led *led = container_of(work, struct lp55xx_led,
+ brightness_work);
+ struct lp55xx_chip *chip = led->chip;
- return len;
+ mutex_lock(&chip->lock);
+ lp55xx_write(chip, LP5521_REG_LED_PWM_BASE + led->chan_nr,
+ led->brightness);
+ mutex_unlock(&chip->lock);
}
static ssize_t lp5521_selftest(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- struct i2c_client *client = to_i2c_client(dev);
- struct lp5521_chip *chip = i2c_get_clientdata(client);
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
int ret;
mutex_lock(&chip->lock);
@@ -534,133 +363,11 @@ static ssize_t lp5521_selftest(struct device *dev,
return sprintf(buf, "%s\n", ret ? "FAIL" : "OK");
}
-static void lp5521_clear_program_memory(struct i2c_client *cl)
-{
- int i;
- u8 rgb_mem[] = {
- LP5521_REG_R_PROG_MEM,
- LP5521_REG_G_PROG_MEM,
- LP5521_REG_B_PROG_MEM,
- };
-
- for (i = 0; i < ARRAY_SIZE(rgb_mem); i++) {
- lp5521_write(cl, rgb_mem[i], 0);
- lp5521_write(cl, rgb_mem[i] + 1, 0);
- }
-}
-
-static void lp5521_write_program_memory(struct i2c_client *cl,
- u8 base, u8 *rgb, int size)
-{
- int i;
-
- if (!rgb || size <= 0)
- return;
-
- for (i = 0; i < size; i++)
- lp5521_write(cl, base + i, *(rgb + i));
-
- lp5521_write(cl, base + i, 0);
- lp5521_write(cl, base + i + 1, 0);
-}
-
-static inline struct lp5521_led_pattern *lp5521_get_pattern
- (struct lp5521_chip *chip, u8 offset)
-{
- struct lp5521_led_pattern *ptn;
- ptn = chip->pdata->patterns + (offset - 1);
- return ptn;
-}
-
-static void lp5521_run_led_pattern(int mode, struct lp5521_chip *chip)
-{
- struct lp5521_led_pattern *ptn;
- struct i2c_client *cl = chip->client;
- int num_patterns = chip->pdata->num_patterns;
-
- if (mode > num_patterns || !(chip->pdata->patterns))
- return;
-
- if (mode == PATTERN_OFF) {
- lp5521_write(cl, LP5521_REG_ENABLE, LP5521_ENABLE_DEFAULT);
- usleep_range(1000, 2000);
- lp5521_write(cl, LP5521_REG_OP_MODE, LP5521_CMD_DIRECT);
- } else {
- ptn = lp5521_get_pattern(chip, mode);
- if (!ptn)
- return;
-
- lp5521_write(cl, LP5521_REG_OP_MODE, LP5521_CMD_LOAD);
- usleep_range(1000, 2000);
-
- lp5521_clear_program_memory(cl);
-
- lp5521_write_program_memory(cl, LP5521_REG_R_PROG_MEM,
- ptn->r, ptn->size_r);
- lp5521_write_program_memory(cl, LP5521_REG_G_PROG_MEM,
- ptn->g, ptn->size_g);
- lp5521_write_program_memory(cl, LP5521_REG_B_PROG_MEM,
- ptn->b, ptn->size_b);
-
- lp5521_write(cl, LP5521_REG_OP_MODE, LP5521_CMD_RUN);
- usleep_range(1000, 2000);
- lp5521_write(cl, LP5521_REG_ENABLE, LP5521_ENABLE_RUN_PROGRAM);
- }
-}
-
-static ssize_t store_led_pattern(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len)
-{
- struct lp5521_chip *chip = i2c_get_clientdata(to_i2c_client(dev));
- unsigned long val;
- int ret;
-
- ret = kstrtoul(buf, 16, &val);
- if (ret)
- return ret;
-
- lp5521_run_led_pattern(val, chip);
-
- return len;
-}
-
-/* led class device attributes */
-static DEVICE_ATTR(led_current, S_IRUGO | S_IWUSR, show_current, store_current);
-static DEVICE_ATTR(max_current, S_IRUGO , show_max_current, NULL);
-
-static struct attribute *lp5521_led_attributes[] = {
- &dev_attr_led_current.attr,
- &dev_attr_max_current.attr,
- NULL,
-};
-
-static struct attribute_group lp5521_led_attribute_group = {
- .attrs = lp5521_led_attributes
-};
-
/* device attributes */
-static DEVICE_ATTR(engine1_mode, S_IRUGO | S_IWUSR,
- show_engine1_mode, store_engine1_mode);
-static DEVICE_ATTR(engine2_mode, S_IRUGO | S_IWUSR,
- show_engine2_mode, store_engine2_mode);
-static DEVICE_ATTR(engine3_mode, S_IRUGO | S_IWUSR,
- show_engine3_mode, store_engine3_mode);
-static DEVICE_ATTR(engine1_load, S_IWUSR, NULL, store_engine1_load);
-static DEVICE_ATTR(engine2_load, S_IWUSR, NULL, store_engine2_load);
-static DEVICE_ATTR(engine3_load, S_IWUSR, NULL, store_engine3_load);
static DEVICE_ATTR(selftest, S_IRUGO, lp5521_selftest, NULL);
-static DEVICE_ATTR(led_pattern, S_IWUSR, NULL, store_led_pattern);
static struct attribute *lp5521_attributes[] = {
- &dev_attr_engine1_mode.attr,
- &dev_attr_engine2_mode.attr,
- &dev_attr_engine3_mode.attr,
&dev_attr_selftest.attr,
- &dev_attr_engine1_load.attr,
- &dev_attr_engine2_load.attr,
- &dev_attr_engine3_load.attr,
- &dev_attr_led_pattern.attr,
NULL
};
@@ -668,217 +375,91 @@ static const struct attribute_group lp5521_group = {
.attrs = lp5521_attributes,
};
-static int lp5521_register_sysfs(struct i2c_client *client)
-{
- struct device *dev = &client->dev;
- return sysfs_create_group(&dev->kobj, &lp5521_group);
-}
-
-static void lp5521_unregister_sysfs(struct i2c_client *client)
-{
- struct lp5521_chip *chip = i2c_get_clientdata(client);
- struct device *dev = &client->dev;
- int i;
-
- sysfs_remove_group(&dev->kobj, &lp5521_group);
-
- for (i = 0; i < chip->num_leds; i++)
- sysfs_remove_group(&chip->leds[i].cdev.dev->kobj,
- &lp5521_led_attribute_group);
-}
-
-static int lp5521_init_led(struct lp5521_led *led,
- struct i2c_client *client,
- int chan, struct lp5521_platform_data *pdata)
-{
- struct device *dev = &client->dev;
- char name[32];
- int res;
-
- if (chan >= LP5521_MAX_LEDS)
- return -EINVAL;
-
- if (pdata->led_config[chan].led_current == 0)
- return 0;
-
- led->led_current = pdata->led_config[chan].led_current;
- led->max_current = pdata->led_config[chan].max_current;
- led->chan_nr = pdata->led_config[chan].chan_nr;
-
- if (led->chan_nr >= LP5521_MAX_LEDS) {
- dev_err(dev, "Use channel numbers between 0 and %d\n",
- LP5521_MAX_LEDS - 1);
- return -EINVAL;
- }
-
- led->cdev.brightness_set = lp5521_set_brightness;
- if (pdata->led_config[chan].name) {
- led->cdev.name = pdata->led_config[chan].name;
- } else {
- snprintf(name, sizeof(name), "%s:channel%d",
- pdata->label ?: client->name, chan);
- led->cdev.name = name;
- }
-
- res = led_classdev_register(dev, &led->cdev);
- if (res < 0) {
- dev_err(dev, "couldn't register led on channel %d\n", chan);
- return res;
- }
-
- res = sysfs_create_group(&led->cdev.dev->kobj,
- &lp5521_led_attribute_group);
- if (res < 0) {
- dev_err(dev, "couldn't register current attribute\n");
- led_classdev_unregister(&led->cdev);
- return res;
- }
- return 0;
-}
+/* Chip specific configurations */
+static struct lp55xx_device_config lp5521_cfg = {
+ .reset = {
+ .addr = LP5521_REG_RESET,
+ .val = LP5521_RESET,
+ },
+ .enable = {
+ .addr = LP5521_REG_ENABLE,
+ .val = LP5521_ENABLE_DEFAULT,
+ },
+ .max_channel = LP5521_MAX_LEDS,
+ .post_init_device = lp5521_post_init_device,
+ .brightness_work_fn = lp5521_led_brightness_work,
+ .set_led_current = lp5521_set_led_current,
+ .firmware_cb = lp5521_firmware_loaded,
+ .run_engine = lp5521_run_engine,
+ .dev_attr_group = &lp5521_group,
+};
static int lp5521_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
- struct lp5521_chip *chip;
- struct lp5521_platform_data *pdata;
- int ret, i, led;
- u8 buf;
-
- chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
- if (!chip)
- return -ENOMEM;
-
- i2c_set_clientdata(client, chip);
- chip->client = client;
-
- pdata = client->dev.platform_data;
+ int ret;
+ struct lp55xx_chip *chip;
+ struct lp55xx_led *led;
+ struct lp55xx_platform_data *pdata = client->dev.platform_data;
if (!pdata) {
dev_err(&client->dev, "no platform data\n");
return -EINVAL;
}
- mutex_init(&chip->lock);
-
- chip->pdata = pdata;
-
- if (pdata->setup_resources) {
- ret = pdata->setup_resources();
- if (ret < 0)
- return ret;
- }
+ chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
- if (pdata->enable) {
- pdata->enable(0);
- usleep_range(1000, 2000); /* Keep enable down at least 1ms */
- pdata->enable(1);
- usleep_range(1000, 2000); /* 500us abs min. */
- }
+ led = devm_kzalloc(&client->dev,
+ sizeof(*led) * pdata->num_channels, GFP_KERNEL);
+ if (!led)
+ return -ENOMEM;
- lp5521_write(client, LP5521_REG_RESET, 0xff);
- usleep_range(10000, 20000); /*
- * Exact value is not available. 10 - 20ms
- * appears to be enough for reset.
- */
+ chip->cl = client;
+ chip->pdata = pdata;
+ chip->cfg = &lp5521_cfg;
- /*
- * Make sure that the chip is reset by reading back the r channel
- * current reg. This is dummy read is required on some platforms -
- * otherwise further access to the R G B channels in the
- * LP5521_REG_ENABLE register will not have any effect - strange!
- */
- ret = lp5521_read(client, LP5521_REG_R_CURRENT, &buf);
- if (ret) {
- dev_err(&client->dev, "error in resetting chip\n");
- goto fail2;
- }
- if (buf != LP5521_REG_R_CURR_DEFAULT) {
- dev_err(&client->dev,
- "unexpected data in register (expected 0x%x got 0x%x)\n",
- LP5521_REG_R_CURR_DEFAULT, buf);
- ret = -EINVAL;
- goto fail2;
- }
- usleep_range(10000, 20000);
+ mutex_init(&chip->lock);
- ret = lp5521_detect(client);
+ i2c_set_clientdata(client, led);
- if (ret) {
- dev_err(&client->dev, "Chip not found\n");
- goto fail2;
- }
+ ret = lp55xx_init_device(chip);
+ if (ret)
+ goto err_init;
dev_info(&client->dev, "%s programmable led chip found\n", id->name);
- ret = lp5521_configure(client);
- if (ret < 0) {
- dev_err(&client->dev, "error configuring chip\n");
- goto fail1;
- }
-
- /* Initialize leds */
- chip->num_channels = pdata->num_channels;
- chip->num_leds = 0;
- led = 0;
- for (i = 0; i < pdata->num_channels; i++) {
- /* Do not initialize channels that are not connected */
- if (pdata->led_config[i].led_current == 0)
- continue;
-
- ret = lp5521_init_led(&chip->leds[led], client, i, pdata);
- if (ret) {
- dev_err(&client->dev, "error initializing leds\n");
- goto fail2;
- }
- chip->num_leds++;
-
- chip->leds[led].id = led;
- /* Set initial LED current */
- lp5521_set_led_current(chip, led,
- chip->leds[led].led_current);
-
- INIT_WORK(&(chip->leds[led].brightness_work),
- lp5521_led_brightness_work);
-
- led++;
- }
+ ret = lp55xx_register_leds(led, chip);
+ if (ret)
+ goto err_register_leds;
- ret = lp5521_register_sysfs(client);
+ ret = lp55xx_register_sysfs(chip);
if (ret) {
dev_err(&client->dev, "registering sysfs failed\n");
- goto fail2;
- }
- return ret;
-fail2:
- for (i = 0; i < chip->num_leds; i++) {
- led_classdev_unregister(&chip->leds[i].cdev);
- cancel_work_sync(&chip->leds[i].brightness_work);
+ goto err_register_sysfs;
}
-fail1:
- if (pdata->enable)
- pdata->enable(0);
- if (pdata->release_resources)
- pdata->release_resources();
+
+ return 0;
+
+err_register_sysfs:
+ lp55xx_unregister_leds(led, chip);
+err_register_leds:
+ lp55xx_deinit_device(chip);
+err_init:
return ret;
}
static int lp5521_remove(struct i2c_client *client)
{
- struct lp5521_chip *chip = i2c_get_clientdata(client);
- int i;
+ struct lp55xx_led *led = i2c_get_clientdata(client);
+ struct lp55xx_chip *chip = led->chip;
- lp5521_run_led_pattern(PATTERN_OFF, chip);
- lp5521_unregister_sysfs(client);
-
- for (i = 0; i < chip->num_leds; i++) {
- led_classdev_unregister(&chip->leds[i].cdev);
- cancel_work_sync(&chip->leds[i].brightness_work);
- }
+ lp5521_stop_engine(chip);
+ lp55xx_unregister_sysfs(chip);
+ lp55xx_unregister_leds(led, chip);
+ lp55xx_deinit_device(chip);
- if (chip->pdata->enable)
- chip->pdata->enable(0);
- if (chip->pdata->release_resources)
- chip->pdata->release_resources();
return 0;
}
@@ -900,5 +481,6 @@ static struct i2c_driver lp5521_driver = {
module_i2c_driver(lp5521_driver);
MODULE_AUTHOR("Mathias Nyman, Yuri Zaporozhets, Samu Onkalo");
+MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>");
MODULE_DESCRIPTION("LP5521 LED engine");
MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/leds-lp5523.c b/drivers/leds/leds-lp5523.c
index 7f5be8948cde..229f734040af 100644
--- a/drivers/leds/leds-lp5523.c
+++ b/drivers/leds/leds-lp5523.c
@@ -2,8 +2,10 @@
* lp5523.c - LP5523 LED Driver
*
* Copyright (C) 2010 Nokia Corporation
+ * Copyright (C) 2012 Texas Instruments
*
* Contact: Samu Onkalo <samu.p.onkalo@nokia.com>
+ * Milo(Woogyom) Kim <milo.kim@ti.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
@@ -20,502 +22,351 @@
* 02110-1301 USA
*/
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/i2c.h>
-#include <linux/mutex.h>
-#include <linux/gpio.h>
-#include <linux/interrupt.h>
#include <linux/delay.h>
-#include <linux/ctype.h>
-#include <linux/spinlock.h>
-#include <linux/wait.h>
+#include <linux/firmware.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
#include <linux/leds.h>
-#include <linux/leds-lp5523.h>
-#include <linux/workqueue.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/platform_data/leds-lp55xx.h>
#include <linux/slab.h>
+#include "leds-lp55xx-common.h"
+
+#define LP5523_PROGRAM_LENGTH 32
+#define LP5523_MAX_LEDS 9
+
+/* Registers */
#define LP5523_REG_ENABLE 0x00
#define LP5523_REG_OP_MODE 0x01
-#define LP5523_REG_RATIOMETRIC_MSB 0x02
-#define LP5523_REG_RATIOMETRIC_LSB 0x03
#define LP5523_REG_ENABLE_LEDS_MSB 0x04
#define LP5523_REG_ENABLE_LEDS_LSB 0x05
-#define LP5523_REG_LED_CNTRL_BASE 0x06
#define LP5523_REG_LED_PWM_BASE 0x16
#define LP5523_REG_LED_CURRENT_BASE 0x26
#define LP5523_REG_CONFIG 0x36
-#define LP5523_REG_CHANNEL1_PC 0x37
-#define LP5523_REG_CHANNEL2_PC 0x38
-#define LP5523_REG_CHANNEL3_PC 0x39
-#define LP5523_REG_STATUS 0x3a
-#define LP5523_REG_GPO 0x3b
-#define LP5523_REG_VARIABLE 0x3c
-#define LP5523_REG_RESET 0x3d
-#define LP5523_REG_TEMP_CTRL 0x3e
-#define LP5523_REG_TEMP_READ 0x3f
-#define LP5523_REG_TEMP_WRITE 0x40
+#define LP5523_REG_STATUS 0x3A
+#define LP5523_REG_RESET 0x3D
#define LP5523_REG_LED_TEST_CTRL 0x41
#define LP5523_REG_LED_TEST_ADC 0x42
-#define LP5523_REG_ENG1_VARIABLE 0x45
-#define LP5523_REG_ENG2_VARIABLE 0x46
-#define LP5523_REG_ENG3_VARIABLE 0x47
-#define LP5523_REG_MASTER_FADER1 0x48
-#define LP5523_REG_MASTER_FADER2 0x49
-#define LP5523_REG_MASTER_FADER3 0x4a
-#define LP5523_REG_CH1_PROG_START 0x4c
-#define LP5523_REG_CH2_PROG_START 0x4d
-#define LP5523_REG_CH3_PROG_START 0x4e
-#define LP5523_REG_PROG_PAGE_SEL 0x4f
+#define LP5523_REG_PROG_PAGE_SEL 0x4F
#define LP5523_REG_PROG_MEM 0x50
-#define LP5523_CMD_LOAD 0x15 /* 00010101 */
-#define LP5523_CMD_RUN 0x2a /* 00101010 */
-#define LP5523_CMD_DISABLED 0x00 /* 00000000 */
-
+/* Bit description in registers */
#define LP5523_ENABLE 0x40
#define LP5523_AUTO_INC 0x40
#define LP5523_PWR_SAVE 0x20
#define LP5523_PWM_PWR_SAVE 0x04
-#define LP5523_CP_1 0x08
-#define LP5523_CP_1_5 0x10
#define LP5523_CP_AUTO 0x18
-#define LP5523_INT_CLK 0x01
#define LP5523_AUTO_CLK 0x02
+
#define LP5523_EN_LEDTEST 0x80
#define LP5523_LEDTEST_DONE 0x80
-
-#define LP5523_DEFAULT_CURRENT 50 /* microAmps */
-#define LP5523_PROGRAM_LENGTH 32 /* in bytes */
-#define LP5523_PROGRAM_PAGES 6
+#define LP5523_RESET 0xFF
#define LP5523_ADC_SHORTCIRC_LIM 80
-
-#define LP5523_LEDS 9
-#define LP5523_ENGINES 3
-
-#define LP5523_ENG_MASK_BASE 0x30 /* 00110000 */
-
-#define LP5523_ENG_STATUS_MASK 0x07 /* 00000111 */
-
-#define LP5523_IRQ_FLAGS IRQF_TRIGGER_FALLING
-
#define LP5523_EXT_CLK_USED 0x08
-#define LED_ACTIVE(mux, led) (!!(mux & (0x0001 << led)))
-#define SHIFT_MASK(id) (((id) - 1) * 2)
+/* Memory Page Selection */
+#define LP5523_PAGE_ENG1 0
+#define LP5523_PAGE_ENG2 1
+#define LP5523_PAGE_ENG3 2
+
+/* Program Memory Operations */
+#define LP5523_MODE_ENG1_M 0x30 /* Operation Mode Register */
+#define LP5523_MODE_ENG2_M 0x0C
+#define LP5523_MODE_ENG3_M 0x03
+#define LP5523_LOAD_ENG1 0x10
+#define LP5523_LOAD_ENG2 0x04
+#define LP5523_LOAD_ENG3 0x01
+
+#define LP5523_ENG1_IS_LOADING(mode) \
+ ((mode & LP5523_MODE_ENG1_M) == LP5523_LOAD_ENG1)
+#define LP5523_ENG2_IS_LOADING(mode) \
+ ((mode & LP5523_MODE_ENG2_M) == LP5523_LOAD_ENG2)
+#define LP5523_ENG3_IS_LOADING(mode) \
+ ((mode & LP5523_MODE_ENG3_M) == LP5523_LOAD_ENG3)
+
+#define LP5523_EXEC_ENG1_M 0x30 /* Enable Register */
+#define LP5523_EXEC_ENG2_M 0x0C
+#define LP5523_EXEC_ENG3_M 0x03
+#define LP5523_EXEC_M 0x3F
+#define LP5523_RUN_ENG1 0x20
+#define LP5523_RUN_ENG2 0x08
+#define LP5523_RUN_ENG3 0x02
enum lp5523_chip_id {
LP5523,
LP55231,
};
-struct lp5523_engine {
- int id;
- u8 mode;
- u8 prog_page;
- u8 mux_page;
- u16 led_mux;
- u8 engine_mask;
-};
-
-struct lp5523_led {
- int id;
- u8 chan_nr;
- u8 led_current;
- u8 max_current;
- struct led_classdev cdev;
- struct work_struct brightness_work;
- u8 brightness;
-};
-
-struct lp5523_chip {
- struct mutex lock; /* Serialize control */
- struct i2c_client *client;
- struct lp5523_engine engines[LP5523_ENGINES];
- struct lp5523_led leds[LP5523_LEDS];
- struct lp5523_platform_data *pdata;
- u8 num_channels;
- u8 num_leds;
-};
-
-static inline struct lp5523_led *cdev_to_led(struct led_classdev *cdev)
+static inline void lp5523_wait_opmode_done(void)
{
- return container_of(cdev, struct lp5523_led, cdev);
-}
-
-static inline struct lp5523_chip *engine_to_lp5523(struct lp5523_engine *engine)
-{
- return container_of(engine, struct lp5523_chip,
- engines[engine->id - 1]);
-}
-
-static inline struct lp5523_chip *led_to_lp5523(struct lp5523_led *led)
-{
- return container_of(led, struct lp5523_chip,
- leds[led->id]);
+ usleep_range(1000, 2000);
}
-static void lp5523_set_mode(struct lp5523_engine *engine, u8 mode);
-static int lp5523_set_engine_mode(struct lp5523_engine *engine, u8 mode);
-static int lp5523_load_program(struct lp5523_engine *engine, const u8 *pattern);
-
-static void lp5523_led_brightness_work(struct work_struct *work);
-
-static int lp5523_write(struct i2c_client *client, u8 reg, u8 value)
+static void lp5523_set_led_current(struct lp55xx_led *led, u8 led_current)
{
- return i2c_smbus_write_byte_data(client, reg, value);
+ led->led_current = led_current;
+ lp55xx_write(led->chip, LP5523_REG_LED_CURRENT_BASE + led->chan_nr,
+ led_current);
}
-static int lp5523_read(struct i2c_client *client, u8 reg, u8 *buf)
-{
- s32 ret = i2c_smbus_read_byte_data(client, reg);
-
- if (ret < 0)
- return ret;
-
- *buf = ret;
- return 0;
-}
-
-static int lp5523_detect(struct i2c_client *client)
+static int lp5523_post_init_device(struct lp55xx_chip *chip)
{
int ret;
- u8 buf;
- ret = lp5523_write(client, LP5523_REG_ENABLE, LP5523_ENABLE);
- if (ret)
- return ret;
- ret = lp5523_read(client, LP5523_REG_ENABLE, &buf);
+ ret = lp55xx_write(chip, LP5523_REG_ENABLE, LP5523_ENABLE);
if (ret)
return ret;
- if (buf == 0x40)
- return 0;
- else
- return -ENODEV;
-}
-static int lp5523_configure(struct i2c_client *client)
-{
- struct lp5523_chip *chip = i2c_get_clientdata(client);
- int ret = 0;
- u8 status;
-
- /* one pattern per engine setting led mux start and stop addresses */
- static const u8 pattern[][LP5523_PROGRAM_LENGTH] = {
- { 0x9c, 0x30, 0x9c, 0xb0, 0x9d, 0x80, 0xd8, 0x00, 0},
- { 0x9c, 0x40, 0x9c, 0xc0, 0x9d, 0x80, 0xd8, 0x00, 0},
- { 0x9c, 0x50, 0x9c, 0xd0, 0x9d, 0x80, 0xd8, 0x00, 0},
- };
-
- ret |= lp5523_write(client, LP5523_REG_ENABLE, LP5523_ENABLE);
/* Chip startup time is 500 us, 1 - 2 ms gives some margin */
usleep_range(1000, 2000);
- ret |= lp5523_write(client, LP5523_REG_CONFIG,
+ ret = lp55xx_write(chip, LP5523_REG_CONFIG,
LP5523_AUTO_INC | LP5523_PWR_SAVE |
LP5523_CP_AUTO | LP5523_AUTO_CLK |
LP5523_PWM_PWR_SAVE);
+ if (ret)
+ return ret;
/* turn on all leds */
- ret |= lp5523_write(client, LP5523_REG_ENABLE_LEDS_MSB, 0x01);
- ret |= lp5523_write(client, LP5523_REG_ENABLE_LEDS_LSB, 0xff);
-
- /* hardcode 32 bytes of memory for each engine from program memory */
- ret |= lp5523_write(client, LP5523_REG_CH1_PROG_START, 0x00);
- ret |= lp5523_write(client, LP5523_REG_CH2_PROG_START, 0x10);
- ret |= lp5523_write(client, LP5523_REG_CH3_PROG_START, 0x20);
-
- /* write led mux address space for each channel */
- ret |= lp5523_load_program(&chip->engines[0], pattern[0]);
- ret |= lp5523_load_program(&chip->engines[1], pattern[1]);
- ret |= lp5523_load_program(&chip->engines[2], pattern[2]);
-
- if (ret) {
- dev_err(&client->dev, "could not load mux programs\n");
- return -1;
- }
-
- /* set all engines exec state and mode to run 00101010 */
- ret |= lp5523_write(client, LP5523_REG_ENABLE,
- (LP5523_CMD_RUN | LP5523_ENABLE));
-
- ret |= lp5523_write(client, LP5523_REG_OP_MODE, LP5523_CMD_RUN);
-
- if (ret) {
- dev_err(&client->dev, "could not start mux programs\n");
- return -1;
- }
-
- /* Let the programs run for couple of ms and check the engine status */
- usleep_range(3000, 6000);
- ret = lp5523_read(client, LP5523_REG_STATUS, &status);
- if (ret < 0)
+ ret = lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_MSB, 0x01);
+ if (ret)
return ret;
- status &= LP5523_ENG_STATUS_MASK;
-
- if (status == LP5523_ENG_STATUS_MASK) {
- dev_dbg(&client->dev, "all engines configured\n");
- } else {
- dev_info(&client->dev, "status == %x\n", status);
- dev_err(&client->dev, "cound not configure LED engine\n");
- return -1;
- }
-
- dev_info(&client->dev, "disabling engines\n");
-
- ret |= lp5523_write(client, LP5523_REG_OP_MODE, LP5523_CMD_DISABLED);
-
- return ret;
+ return lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_LSB, 0xff);
}
-static int lp5523_set_engine_mode(struct lp5523_engine *engine, u8 mode)
+static void lp5523_load_engine(struct lp55xx_chip *chip)
{
- struct lp5523_chip *chip = engine_to_lp5523(engine);
- struct i2c_client *client = chip->client;
- int ret;
- u8 engine_state;
+ enum lp55xx_engine_index idx = chip->engine_idx;
+ u8 mask[] = {
+ [LP55XX_ENGINE_1] = LP5523_MODE_ENG1_M,
+ [LP55XX_ENGINE_2] = LP5523_MODE_ENG2_M,
+ [LP55XX_ENGINE_3] = LP5523_MODE_ENG3_M,
+ };
- ret = lp5523_read(client, LP5523_REG_OP_MODE, &engine_state);
- if (ret)
- goto fail;
+ u8 val[] = {
+ [LP55XX_ENGINE_1] = LP5523_LOAD_ENG1,
+ [LP55XX_ENGINE_2] = LP5523_LOAD_ENG2,
+ [LP55XX_ENGINE_3] = LP5523_LOAD_ENG3,
+ };
- engine_state &= ~(engine->engine_mask);
+ u8 page_sel[] = {
+ [LP55XX_ENGINE_1] = LP5523_PAGE_ENG1,
+ [LP55XX_ENGINE_2] = LP5523_PAGE_ENG2,
+ [LP55XX_ENGINE_3] = LP5523_PAGE_ENG3,
+ };
- /* set mode only for this engine */
- mode &= engine->engine_mask;
+ lp55xx_update_bits(chip, LP5523_REG_OP_MODE, mask[idx], val[idx]);
- engine_state |= mode;
+ lp5523_wait_opmode_done();
- ret |= lp5523_write(client, LP5523_REG_OP_MODE, engine_state);
-fail:
- return ret;
+ lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, page_sel[idx]);
}
-static int lp5523_load_mux(struct lp5523_engine *engine, u16 mux)
+static void lp5523_stop_engine(struct lp55xx_chip *chip)
{
- struct lp5523_chip *chip = engine_to_lp5523(engine);
- struct i2c_client *client = chip->client;
- int ret = 0;
-
- ret |= lp5523_set_engine_mode(engine, LP5523_CMD_LOAD);
+ lp55xx_write(chip, LP5523_REG_OP_MODE, 0);
+ lp5523_wait_opmode_done();
+}
- ret |= lp5523_write(client, LP5523_REG_PROG_PAGE_SEL, engine->mux_page);
- ret |= lp5523_write(client, LP5523_REG_PROG_MEM,
- (u8)(mux >> 8));
- ret |= lp5523_write(client, LP5523_REG_PROG_MEM + 1, (u8)(mux));
- engine->led_mux = mux;
+static void lp5523_turn_off_channels(struct lp55xx_chip *chip)
+{
+ int i;
- return ret;
+ for (i = 0; i < LP5523_MAX_LEDS; i++)
+ lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0);
}
-static int lp5523_load_program(struct lp5523_engine *engine, const u8 *pattern)
+static void lp5523_run_engine(struct lp55xx_chip *chip, bool start)
{
- struct lp5523_chip *chip = engine_to_lp5523(engine);
- struct i2c_client *client = chip->client;
+ int ret;
+ u8 mode;
+ u8 exec;
- int ret = 0;
+ /* stop engine */
+ if (!start) {
+ lp5523_stop_engine(chip);
+ lp5523_turn_off_channels(chip);
+ return;
+ }
- ret |= lp5523_set_engine_mode(engine, LP5523_CMD_LOAD);
+ /*
+ * To run the engine,
+ * operation mode and enable register should updated at the same time
+ */
- ret |= lp5523_write(client, LP5523_REG_PROG_PAGE_SEL,
- engine->prog_page);
- ret |= i2c_smbus_write_i2c_block_data(client, LP5523_REG_PROG_MEM,
- LP5523_PROGRAM_LENGTH, pattern);
+ ret = lp55xx_read(chip, LP5523_REG_OP_MODE, &mode);
+ if (ret)
+ return;
- return ret;
-}
+ ret = lp55xx_read(chip, LP5523_REG_ENABLE, &exec);
+ if (ret)
+ return;
-static int lp5523_run_program(struct lp5523_engine *engine)
-{
- struct lp5523_chip *chip = engine_to_lp5523(engine);
- struct i2c_client *client = chip->client;
- int ret;
+ /* change operation mode to RUN only when each engine is loading */
+ if (LP5523_ENG1_IS_LOADING(mode)) {
+ mode = (mode & ~LP5523_MODE_ENG1_M) | LP5523_RUN_ENG1;
+ exec = (exec & ~LP5523_EXEC_ENG1_M) | LP5523_RUN_ENG1;
+ }
- ret = lp5523_write(client, LP5523_REG_ENABLE,
- LP5523_CMD_RUN | LP5523_ENABLE);
- if (ret)
- goto fail;
+ if (LP5523_ENG2_IS_LOADING(mode)) {
+ mode = (mode & ~LP5523_MODE_ENG2_M) | LP5523_RUN_ENG2;
+ exec = (exec & ~LP5523_EXEC_ENG2_M) | LP5523_RUN_ENG2;
+ }
- ret = lp5523_set_engine_mode(engine, LP5523_CMD_RUN);
-fail:
- return ret;
+ if (LP5523_ENG3_IS_LOADING(mode)) {
+ mode = (mode & ~LP5523_MODE_ENG3_M) | LP5523_RUN_ENG3;
+ exec = (exec & ~LP5523_EXEC_ENG3_M) | LP5523_RUN_ENG3;
+ }
+
+ lp55xx_write(chip, LP5523_REG_OP_MODE, mode);
+ lp5523_wait_opmode_done();
+
+ lp55xx_update_bits(chip, LP5523_REG_ENABLE, LP5523_EXEC_M, exec);
}
-static int lp5523_mux_parse(const char *buf, u16 *mux, size_t len)
+static int lp5523_update_program_memory(struct lp55xx_chip *chip,
+ const u8 *data, size_t size)
{
+ u8 pattern[LP5523_PROGRAM_LENGTH] = {0};
+ unsigned cmd;
+ char c[3];
+ int update_size;
+ int nrchars;
+ int offset = 0;
+ int ret;
int i;
- u16 tmp_mux = 0;
-
- len = min_t(int, len, LP5523_LEDS);
- for (i = 0; i < len; i++) {
- switch (buf[i]) {
- case '1':
- tmp_mux |= (1 << i);
- break;
- case '0':
- break;
- case '\n':
- i = len;
- break;
- default:
- return -1;
- }
- }
- *mux = tmp_mux;
- return 0;
-}
+ /* clear program memory before updating */
+ for (i = 0; i < LP5523_PROGRAM_LENGTH; i++)
+ lp55xx_write(chip, LP5523_REG_PROG_MEM + i, 0);
-static void lp5523_mux_to_array(u16 led_mux, char *array)
-{
- int i, pos = 0;
- for (i = 0; i < LP5523_LEDS; i++)
- pos += sprintf(array + pos, "%x", LED_ACTIVE(led_mux, i));
+ i = 0;
+ while ((offset < size - 1) && (i < LP5523_PROGRAM_LENGTH)) {
+ /* separate sscanfs because length is working only for %s */
+ ret = sscanf(data + offset, "%2s%n ", c, &nrchars);
+ if (ret != 1)
+ goto err;
- array[pos] = '\0';
-}
+ ret = sscanf(c, "%2x", &cmd);
+ if (ret != 1)
+ goto err;
-/*--------------------------------------------------------------*/
-/* Sysfs interface */
-/*--------------------------------------------------------------*/
+ pattern[i] = (u8)cmd;
+ offset += nrchars;
+ i++;
+ }
-static ssize_t show_engine_leds(struct device *dev,
- struct device_attribute *attr,
- char *buf, int nr)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct lp5523_chip *chip = i2c_get_clientdata(client);
- char mux[LP5523_LEDS + 1];
+ /* Each instruction is 16bit long. Check that length is even */
+ if (i % 2)
+ goto err;
- lp5523_mux_to_array(chip->engines[nr - 1].led_mux, mux);
+ update_size = i;
+ for (i = 0; i < update_size; i++)
+ lp55xx_write(chip, LP5523_REG_PROG_MEM + i, pattern[i]);
- return sprintf(buf, "%s\n", mux);
-}
+ return 0;
-#define show_leds(nr) \
-static ssize_t show_engine##nr##_leds(struct device *dev, \
- struct device_attribute *attr, \
- char *buf) \
-{ \
- return show_engine_leds(dev, attr, buf, nr); \
+err:
+ dev_err(&chip->cl->dev, "wrong pattern format\n");
+ return -EINVAL;
}
-show_leds(1)
-show_leds(2)
-show_leds(3)
-static ssize_t store_engine_leds(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len, int nr)
+static void lp5523_firmware_loaded(struct lp55xx_chip *chip)
{
- struct i2c_client *client = to_i2c_client(dev);
- struct lp5523_chip *chip = i2c_get_clientdata(client);
- u16 mux = 0;
- ssize_t ret;
+ const struct firmware *fw = chip->fw;
- if (lp5523_mux_parse(buf, &mux, len))
- return -EINVAL;
-
- mutex_lock(&chip->lock);
- ret = -EINVAL;
- if (chip->engines[nr - 1].mode != LP5523_CMD_LOAD)
- goto leave;
+ if (fw->size > LP5523_PROGRAM_LENGTH) {
+ dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n",
+ fw->size);
+ return;
+ }
- if (lp5523_load_mux(&chip->engines[nr - 1], mux))
- goto leave;
+ /*
+ * Program momery sequence
+ * 1) set engine mode to "LOAD"
+ * 2) write firmware data into program memory
+ */
- ret = len;
-leave:
- mutex_unlock(&chip->lock);
- return ret;
+ lp5523_load_engine(chip);
+ lp5523_update_program_memory(chip, fw->data, fw->size);
}
-#define store_leds(nr) \
-static ssize_t store_engine##nr##_leds(struct device *dev, \
- struct device_attribute *attr, \
- const char *buf, size_t len) \
-{ \
- return store_engine_leds(dev, attr, buf, len, nr); \
-}
-store_leds(1)
-store_leds(2)
-store_leds(3)
-
static ssize_t lp5523_selftest(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- struct i2c_client *client = to_i2c_client(dev);
- struct lp5523_chip *chip = i2c_get_clientdata(client);
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ struct lp55xx_platform_data *pdata = chip->pdata;
int i, ret, pos = 0;
- int led = 0;
u8 status, adc, vdd;
mutex_lock(&chip->lock);
- ret = lp5523_read(chip->client, LP5523_REG_STATUS, &status);
+ ret = lp55xx_read(chip, LP5523_REG_STATUS, &status);
if (ret < 0)
goto fail;
/* Check that ext clock is really in use if requested */
- if ((chip->pdata) && (chip->pdata->clock_mode == LP5523_CLOCK_EXT))
+ if (pdata->clock_mode == LP55XX_CLOCK_EXT) {
if ((status & LP5523_EXT_CLK_USED) == 0)
goto fail;
+ }
/* Measure VDD (i.e. VBAT) first (channel 16 corresponds to VDD) */
- lp5523_write(chip->client, LP5523_REG_LED_TEST_CTRL,
- LP5523_EN_LEDTEST | 16);
+ lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL, LP5523_EN_LEDTEST | 16);
usleep_range(3000, 6000); /* ADC conversion time is typically 2.7 ms */
- ret = lp5523_read(chip->client, LP5523_REG_STATUS, &status);
+ ret = lp55xx_read(chip, LP5523_REG_STATUS, &status);
if (ret < 0)
goto fail;
if (!(status & LP5523_LEDTEST_DONE))
usleep_range(3000, 6000); /* Was not ready. Wait little bit */
- ret = lp5523_read(chip->client, LP5523_REG_LED_TEST_ADC, &vdd);
+ ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &vdd);
if (ret < 0)
goto fail;
vdd--; /* There may be some fluctuation in measurement */
- for (i = 0; i < LP5523_LEDS; i++) {
+ for (i = 0; i < LP5523_MAX_LEDS; i++) {
/* Skip non-existing channels */
- if (chip->pdata->led_config[i].led_current == 0)
+ if (pdata->led_config[i].led_current == 0)
continue;
/* Set default current */
- lp5523_write(chip->client,
- LP5523_REG_LED_CURRENT_BASE + i,
- chip->pdata->led_config[i].led_current);
+ lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + i,
+ pdata->led_config[i].led_current);
- lp5523_write(chip->client, LP5523_REG_LED_PWM_BASE + i, 0xff);
+ lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0xff);
/* let current stabilize 2 - 4ms before measurements start */
usleep_range(2000, 4000);
- lp5523_write(chip->client,
- LP5523_REG_LED_TEST_CTRL,
+ lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL,
LP5523_EN_LEDTEST | i);
/* ADC conversion time is 2.7 ms typically */
usleep_range(3000, 6000);
- ret = lp5523_read(chip->client, LP5523_REG_STATUS, &status);
+ ret = lp55xx_read(chip, LP5523_REG_STATUS, &status);
if (ret < 0)
goto fail;
if (!(status & LP5523_LEDTEST_DONE))
usleep_range(3000, 6000);/* Was not ready. Wait. */
- ret = lp5523_read(chip->client, LP5523_REG_LED_TEST_ADC, &adc);
+
+ ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &adc);
if (ret < 0)
goto fail;
if (adc >= vdd || adc < LP5523_ADC_SHORTCIRC_LIM)
pos += sprintf(buf + pos, "LED %d FAIL\n", i);
- lp5523_write(chip->client, LP5523_REG_LED_PWM_BASE + i, 0x00);
+ lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0x00);
/* Restore current */
- lp5523_write(chip->client,
- LP5523_REG_LED_CURRENT_BASE + i,
- chip->leds[led].led_current);
+ lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + i,
+ led->led_current);
led++;
}
if (pos == 0)
@@ -530,249 +381,22 @@ release_lock:
return pos;
}
-static void lp5523_set_brightness(struct led_classdev *cdev,
- enum led_brightness brightness)
-{
- struct lp5523_led *led = cdev_to_led(cdev);
-
- led->brightness = (u8)brightness;
-
- schedule_work(&led->brightness_work);
-}
-
static void lp5523_led_brightness_work(struct work_struct *work)
{
- struct lp5523_led *led = container_of(work,
- struct lp5523_led,
+ struct lp55xx_led *led = container_of(work, struct lp55xx_led,
brightness_work);
- struct lp5523_chip *chip = led_to_lp5523(led);
- struct i2c_client *client = chip->client;
+ struct lp55xx_chip *chip = led->chip;
mutex_lock(&chip->lock);
-
- lp5523_write(client, LP5523_REG_LED_PWM_BASE + led->chan_nr,
+ lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + led->chan_nr,
led->brightness);
-
- mutex_unlock(&chip->lock);
-}
-
-static int lp5523_do_store_load(struct lp5523_engine *engine,
- const char *buf, size_t len)
-{
- struct lp5523_chip *chip = engine_to_lp5523(engine);
- struct i2c_client *client = chip->client;
- int ret, nrchars, offset = 0, i = 0;
- char c[3];
- unsigned cmd;
- u8 pattern[LP5523_PROGRAM_LENGTH] = {0};
-
- if (engine->mode != LP5523_CMD_LOAD)
- return -EINVAL;
-
- while ((offset < len - 1) && (i < LP5523_PROGRAM_LENGTH)) {
- /* separate sscanfs because length is working only for %s */
- ret = sscanf(buf + offset, "%2s%n ", c, &nrchars);
- ret = sscanf(c, "%2x", &cmd);
- if (ret != 1)
- goto fail;
- pattern[i] = (u8)cmd;
-
- offset += nrchars;
- i++;
- }
-
- /* Each instruction is 16bit long. Check that length is even */
- if (i % 2)
- goto fail;
-
- mutex_lock(&chip->lock);
- ret = lp5523_load_program(engine, pattern);
mutex_unlock(&chip->lock);
-
- if (ret) {
- dev_err(&client->dev, "failed loading pattern\n");
- return ret;
- }
-
- return len;
-fail:
- dev_err(&client->dev, "wrong pattern format\n");
- return -EINVAL;
-}
-
-static ssize_t store_engine_load(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len, int nr)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct lp5523_chip *chip = i2c_get_clientdata(client);
- return lp5523_do_store_load(&chip->engines[nr - 1], buf, len);
}
-#define store_load(nr) \
-static ssize_t store_engine##nr##_load(struct device *dev, \
- struct device_attribute *attr, \
- const char *buf, size_t len) \
-{ \
- return store_engine_load(dev, attr, buf, len, nr); \
-}
-store_load(1)
-store_load(2)
-store_load(3)
-
-static ssize_t show_engine_mode(struct device *dev,
- struct device_attribute *attr,
- char *buf, int nr)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct lp5523_chip *chip = i2c_get_clientdata(client);
- switch (chip->engines[nr - 1].mode) {
- case LP5523_CMD_RUN:
- return sprintf(buf, "run\n");
- case LP5523_CMD_LOAD:
- return sprintf(buf, "load\n");
- case LP5523_CMD_DISABLED:
- return sprintf(buf, "disabled\n");
- default:
- return sprintf(buf, "disabled\n");
- }
-}
-
-#define show_mode(nr) \
-static ssize_t show_engine##nr##_mode(struct device *dev, \
- struct device_attribute *attr, \
- char *buf) \
-{ \
- return show_engine_mode(dev, attr, buf, nr); \
-}
-show_mode(1)
-show_mode(2)
-show_mode(3)
-
-static ssize_t store_engine_mode(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len, int nr)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct lp5523_chip *chip = i2c_get_clientdata(client);
- struct lp5523_engine *engine = &chip->engines[nr - 1];
- mutex_lock(&chip->lock);
-
- if (!strncmp(buf, "run", 3))
- lp5523_set_mode(engine, LP5523_CMD_RUN);
- else if (!strncmp(buf, "load", 4))
- lp5523_set_mode(engine, LP5523_CMD_LOAD);
- else if (!strncmp(buf, "disabled", 8))
- lp5523_set_mode(engine, LP5523_CMD_DISABLED);
-
- mutex_unlock(&chip->lock);
- return len;
-}
-
-#define store_mode(nr) \
-static ssize_t store_engine##nr##_mode(struct device *dev, \
- struct device_attribute *attr, \
- const char *buf, size_t len) \
-{ \
- return store_engine_mode(dev, attr, buf, len, nr); \
-}
-store_mode(1)
-store_mode(2)
-store_mode(3)
-
-static ssize_t show_max_current(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct led_classdev *led_cdev = dev_get_drvdata(dev);
- struct lp5523_led *led = cdev_to_led(led_cdev);
-
- return sprintf(buf, "%d\n", led->max_current);
-}
-
-static ssize_t show_current(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct led_classdev *led_cdev = dev_get_drvdata(dev);
- struct lp5523_led *led = cdev_to_led(led_cdev);
-
- return sprintf(buf, "%d\n", led->led_current);
-}
-
-static ssize_t store_current(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len)
-{
- struct led_classdev *led_cdev = dev_get_drvdata(dev);
- struct lp5523_led *led = cdev_to_led(led_cdev);
- struct lp5523_chip *chip = led_to_lp5523(led);
- ssize_t ret;
- unsigned long curr;
-
- if (kstrtoul(buf, 0, &curr))
- return -EINVAL;
-
- if (curr > led->max_current)
- return -EINVAL;
-
- mutex_lock(&chip->lock);
- ret = lp5523_write(chip->client,
- LP5523_REG_LED_CURRENT_BASE + led->chan_nr,
- (u8)curr);
- mutex_unlock(&chip->lock);
-
- if (ret < 0)
- return ret;
-
- led->led_current = (u8)curr;
-
- return len;
-}
-
-/* led class device attributes */
-static DEVICE_ATTR(led_current, S_IRUGO | S_IWUSR, show_current, store_current);
-static DEVICE_ATTR(max_current, S_IRUGO , show_max_current, NULL);
-
-static struct attribute *lp5523_led_attributes[] = {
- &dev_attr_led_current.attr,
- &dev_attr_max_current.attr,
- NULL,
-};
-
-static struct attribute_group lp5523_led_attribute_group = {
- .attrs = lp5523_led_attributes
-};
-
-/* device attributes */
-static DEVICE_ATTR(engine1_mode, S_IRUGO | S_IWUSR,
- show_engine1_mode, store_engine1_mode);
-static DEVICE_ATTR(engine2_mode, S_IRUGO | S_IWUSR,
- show_engine2_mode, store_engine2_mode);
-static DEVICE_ATTR(engine3_mode, S_IRUGO | S_IWUSR,
- show_engine3_mode, store_engine3_mode);
-static DEVICE_ATTR(engine1_leds, S_IRUGO | S_IWUSR,
- show_engine1_leds, store_engine1_leds);
-static DEVICE_ATTR(engine2_leds, S_IRUGO | S_IWUSR,
- show_engine2_leds, store_engine2_leds);
-static DEVICE_ATTR(engine3_leds, S_IRUGO | S_IWUSR,
- show_engine3_leds, store_engine3_leds);
-static DEVICE_ATTR(engine1_load, S_IWUSR, NULL, store_engine1_load);
-static DEVICE_ATTR(engine2_load, S_IWUSR, NULL, store_engine2_load);
-static DEVICE_ATTR(engine3_load, S_IWUSR, NULL, store_engine3_load);
static DEVICE_ATTR(selftest, S_IRUGO, lp5523_selftest, NULL);
static struct attribute *lp5523_attributes[] = {
- &dev_attr_engine1_mode.attr,
- &dev_attr_engine2_mode.attr,
- &dev_attr_engine3_mode.attr,
&dev_attr_selftest.attr,
- &dev_attr_engine1_load.attr,
- &dev_attr_engine1_leds.attr,
- &dev_attr_engine2_load.attr,
- &dev_attr_engine2_leds.attr,
- &dev_attr_engine3_load.attr,
- &dev_attr_engine3_leds.attr,
NULL,
};
@@ -780,252 +404,91 @@ static const struct attribute_group lp5523_group = {
.attrs = lp5523_attributes,
};
-static int lp5523_register_sysfs(struct i2c_client *client)
-{
- struct device *dev = &client->dev;
- int ret;
-
- ret = sysfs_create_group(&dev->kobj, &lp5523_group);
- if (ret < 0)
- return ret;
-
- return 0;
-}
-
-static void lp5523_unregister_sysfs(struct i2c_client *client)
-{
- struct lp5523_chip *chip = i2c_get_clientdata(client);
- struct device *dev = &client->dev;
- int i;
-
- sysfs_remove_group(&dev->kobj, &lp5523_group);
-
- for (i = 0; i < chip->num_leds; i++)
- sysfs_remove_group(&chip->leds[i].cdev.dev->kobj,
- &lp5523_led_attribute_group);
-}
-
-/*--------------------------------------------------------------*/
-/* Set chip operating mode */
-/*--------------------------------------------------------------*/
-static void lp5523_set_mode(struct lp5523_engine *engine, u8 mode)
-{
- /* if in that mode already do nothing, except for run */
- if (mode == engine->mode && mode != LP5523_CMD_RUN)
- return;
-
- switch (mode) {
- case LP5523_CMD_RUN:
- lp5523_run_program(engine);
- break;
- case LP5523_CMD_LOAD:
- lp5523_set_engine_mode(engine, LP5523_CMD_DISABLED);
- lp5523_set_engine_mode(engine, LP5523_CMD_LOAD);
- break;
- case LP5523_CMD_DISABLED:
- lp5523_set_engine_mode(engine, LP5523_CMD_DISABLED);
- break;
- default:
- return;
- }
-
- engine->mode = mode;
-}
-
-/*--------------------------------------------------------------*/
-/* Probe, Attach, Remove */
-/*--------------------------------------------------------------*/
-static int __init lp5523_init_engine(struct lp5523_engine *engine, int id)
-{
- if (id < 1 || id > LP5523_ENGINES)
- return -1;
- engine->id = id;
- engine->engine_mask = LP5523_ENG_MASK_BASE >> SHIFT_MASK(id);
- engine->prog_page = id - 1;
- engine->mux_page = id + 2;
-
- return 0;
-}
+/* Chip specific configurations */
+static struct lp55xx_device_config lp5523_cfg = {
+ .reset = {
+ .addr = LP5523_REG_RESET,
+ .val = LP5523_RESET,
+ },
+ .enable = {
+ .addr = LP5523_REG_ENABLE,
+ .val = LP5523_ENABLE,
+ },
+ .max_channel = LP5523_MAX_LEDS,
+ .post_init_device = lp5523_post_init_device,
+ .brightness_work_fn = lp5523_led_brightness_work,
+ .set_led_current = lp5523_set_led_current,
+ .firmware_cb = lp5523_firmware_loaded,
+ .run_engine = lp5523_run_engine,
+ .dev_attr_group = &lp5523_group,
+};
-static int lp5523_init_led(struct lp5523_led *led, struct device *dev,
- int chan, struct lp5523_platform_data *pdata,
- const char *chip_name)
+static int lp5523_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
{
- char name[32];
- int res;
+ int ret;
+ struct lp55xx_chip *chip;
+ struct lp55xx_led *led;
+ struct lp55xx_platform_data *pdata = client->dev.platform_data;
- if (chan >= LP5523_LEDS)
+ if (!pdata) {
+ dev_err(&client->dev, "no platform data\n");
return -EINVAL;
-
- if (pdata->led_config[chan].led_current) {
- led->led_current = pdata->led_config[chan].led_current;
- led->max_current = pdata->led_config[chan].max_current;
- led->chan_nr = pdata->led_config[chan].chan_nr;
-
- if (led->chan_nr >= LP5523_LEDS) {
- dev_err(dev, "Use channel numbers between 0 and %d\n",
- LP5523_LEDS - 1);
- return -EINVAL;
- }
-
- if (pdata->led_config[chan].name) {
- led->cdev.name = pdata->led_config[chan].name;
- } else {
- snprintf(name, sizeof(name), "%s:channel%d",
- pdata->label ? : chip_name, chan);
- led->cdev.name = name;
- }
-
- led->cdev.brightness_set = lp5523_set_brightness;
- res = led_classdev_register(dev, &led->cdev);
- if (res < 0) {
- dev_err(dev, "couldn't register led on channel %d\n",
- chan);
- return res;
- }
- res = sysfs_create_group(&led->cdev.dev->kobj,
- &lp5523_led_attribute_group);
- if (res < 0) {
- dev_err(dev, "couldn't register current attribute\n");
- led_classdev_unregister(&led->cdev);
- return res;
- }
- } else {
- led->led_current = 0;
}
- return 0;
-}
-
-static int lp5523_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
-{
- struct lp5523_chip *chip;
- struct lp5523_platform_data *pdata;
- int ret, i, led;
chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
if (!chip)
return -ENOMEM;
- i2c_set_clientdata(client, chip);
- chip->client = client;
+ led = devm_kzalloc(&client->dev,
+ sizeof(*led) * pdata->num_channels, GFP_KERNEL);
+ if (!led)
+ return -ENOMEM;
- pdata = client->dev.platform_data;
-
- if (!pdata) {
- dev_err(&client->dev, "no platform data\n");
- return -EINVAL;
- }
+ chip->cl = client;
+ chip->pdata = pdata;
+ chip->cfg = &lp5523_cfg;
mutex_init(&chip->lock);
- chip->pdata = pdata;
+ i2c_set_clientdata(client, led);
- if (pdata->setup_resources) {
- ret = pdata->setup_resources();
- if (ret < 0)
- return ret;
- }
-
- if (pdata->enable) {
- pdata->enable(0);
- usleep_range(1000, 2000); /* Keep enable down at least 1ms */
- pdata->enable(1);
- usleep_range(1000, 2000); /* 500us abs min. */
- }
-
- lp5523_write(client, LP5523_REG_RESET, 0xff);
- usleep_range(10000, 20000); /*
- * Exact value is not available. 10 - 20ms
- * appears to be enough for reset.
- */
- ret = lp5523_detect(client);
+ ret = lp55xx_init_device(chip);
if (ret)
- goto fail1;
+ goto err_init;
dev_info(&client->dev, "%s Programmable led chip found\n", id->name);
- /* Initialize engines */
- for (i = 0; i < ARRAY_SIZE(chip->engines); i++) {
- ret = lp5523_init_engine(&chip->engines[i], i + 1);
- if (ret) {
- dev_err(&client->dev, "error initializing engine\n");
- goto fail1;
- }
- }
- ret = lp5523_configure(client);
- if (ret < 0) {
- dev_err(&client->dev, "error configuring chip\n");
- goto fail1;
- }
-
- /* Initialize leds */
- chip->num_channels = pdata->num_channels;
- chip->num_leds = 0;
- led = 0;
- for (i = 0; i < pdata->num_channels; i++) {
- /* Do not initialize channels that are not connected */
- if (pdata->led_config[i].led_current == 0)
- continue;
-
- INIT_WORK(&chip->leds[led].brightness_work,
- lp5523_led_brightness_work);
-
- ret = lp5523_init_led(&chip->leds[led], &client->dev, i, pdata,
- id->name);
- if (ret) {
- dev_err(&client->dev, "error initializing leds\n");
- goto fail2;
- }
- chip->num_leds++;
-
- chip->leds[led].id = led;
- /* Set LED current */
- lp5523_write(client,
- LP5523_REG_LED_CURRENT_BASE + chip->leds[led].chan_nr,
- chip->leds[led].led_current);
-
- led++;
- }
+ ret = lp55xx_register_leds(led, chip);
+ if (ret)
+ goto err_register_leds;
- ret = lp5523_register_sysfs(client);
+ ret = lp55xx_register_sysfs(chip);
if (ret) {
dev_err(&client->dev, "registering sysfs failed\n");
- goto fail2;
+ goto err_register_sysfs;
}
- return ret;
-fail2:
- for (i = 0; i < chip->num_leds; i++) {
- led_classdev_unregister(&chip->leds[i].cdev);
- flush_work(&chip->leds[i].brightness_work);
- }
-fail1:
- if (pdata->enable)
- pdata->enable(0);
- if (pdata->release_resources)
- pdata->release_resources();
+
+ return 0;
+
+err_register_sysfs:
+ lp55xx_unregister_leds(led, chip);
+err_register_leds:
+ lp55xx_deinit_device(chip);
+err_init:
return ret;
}
static int lp5523_remove(struct i2c_client *client)
{
- struct lp5523_chip *chip = i2c_get_clientdata(client);
- int i;
-
- /* Disable engine mode */
- lp5523_write(client, LP5523_REG_OP_MODE, LP5523_CMD_DISABLED);
+ struct lp55xx_led *led = i2c_get_clientdata(client);
+ struct lp55xx_chip *chip = led->chip;
- lp5523_unregister_sysfs(client);
-
- for (i = 0; i < chip->num_leds; i++) {
- led_classdev_unregister(&chip->leds[i].cdev);
- flush_work(&chip->leds[i].brightness_work);
- }
+ lp5523_stop_engine(chip);
+ lp55xx_unregister_sysfs(chip);
+ lp55xx_unregister_leds(led, chip);
+ lp55xx_deinit_device(chip);
- if (chip->pdata->enable)
- chip->pdata->enable(0);
- if (chip->pdata->release_resources)
- chip->pdata->release_resources();
return 0;
}
@@ -1049,5 +512,6 @@ static struct i2c_driver lp5523_driver = {
module_i2c_driver(lp5523_driver);
MODULE_AUTHOR("Mathias Nyman <mathias.nyman@nokia.com>");
+MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>");
MODULE_DESCRIPTION("LP5523 LED engine");
MODULE_LICENSE("GPL");
diff --git a/drivers/leds/leds-lp55xx-common.c b/drivers/leds/leds-lp55xx-common.c
new file mode 100644
index 000000000000..d9eb84157423
--- /dev/null
+++ b/drivers/leds/leds-lp55xx-common.c
@@ -0,0 +1,523 @@
+/*
+ * LP5521/LP5523/LP55231 Common Driver
+ *
+ * Copyright 2012 Texas Instruments
+ *
+ * Author: Milo(Woogyom) Kim <milo.kim@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Derived from leds-lp5521.c, leds-lp5523.c
+ */
+
+#include <linux/delay.h>
+#include <linux/firmware.h>
+#include <linux/i2c.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/platform_data/leds-lp55xx.h>
+
+#include "leds-lp55xx-common.h"
+
+static struct lp55xx_led *cdev_to_lp55xx_led(struct led_classdev *cdev)
+{
+ return container_of(cdev, struct lp55xx_led, cdev);
+}
+
+static struct lp55xx_led *dev_to_lp55xx_led(struct device *dev)
+{
+ return cdev_to_lp55xx_led(dev_get_drvdata(dev));
+}
+
+static void lp55xx_reset_device(struct lp55xx_chip *chip)
+{
+ struct lp55xx_device_config *cfg = chip->cfg;
+ u8 addr = cfg->reset.addr;
+ u8 val = cfg->reset.val;
+
+ /* no error checking here because no ACK from the device after reset */
+ lp55xx_write(chip, addr, val);
+}
+
+static int lp55xx_detect_device(struct lp55xx_chip *chip)
+{
+ struct lp55xx_device_config *cfg = chip->cfg;
+ u8 addr = cfg->enable.addr;
+ u8 val = cfg->enable.val;
+ int ret;
+
+ ret = lp55xx_write(chip, addr, val);
+ if (ret)
+ return ret;
+
+ usleep_range(1000, 2000);
+
+ ret = lp55xx_read(chip, addr, &val);
+ if (ret)
+ return ret;
+
+ if (val != cfg->enable.val)
+ return -ENODEV;
+
+ return 0;
+}
+
+static int lp55xx_post_init_device(struct lp55xx_chip *chip)
+{
+ struct lp55xx_device_config *cfg = chip->cfg;
+
+ if (!cfg->post_init_device)
+ return 0;
+
+ return cfg->post_init_device(chip);
+}
+
+static ssize_t lp55xx_show_current(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct lp55xx_led *led = dev_to_lp55xx_led(dev);
+
+ return sprintf(buf, "%d\n", led->led_current);
+}
+
+static ssize_t lp55xx_store_current(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct lp55xx_led *led = dev_to_lp55xx_led(dev);
+ struct lp55xx_chip *chip = led->chip;
+ unsigned long curr;
+
+ if (kstrtoul(buf, 0, &curr))
+ return -EINVAL;
+
+ if (curr > led->max_current)
+ return -EINVAL;
+
+ if (!chip->cfg->set_led_current)
+ return len;
+
+ mutex_lock(&chip->lock);
+ chip->cfg->set_led_current(led, (u8)curr);
+ mutex_unlock(&chip->lock);
+
+ return len;
+}
+
+static ssize_t lp55xx_show_max_current(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct lp55xx_led *led = dev_to_lp55xx_led(dev);
+
+ return sprintf(buf, "%d\n", led->max_current);
+}
+
+static DEVICE_ATTR(led_current, S_IRUGO | S_IWUSR, lp55xx_show_current,
+ lp55xx_store_current);
+static DEVICE_ATTR(max_current, S_IRUGO , lp55xx_show_max_current, NULL);
+
+static struct attribute *lp55xx_led_attributes[] = {
+ &dev_attr_led_current.attr,
+ &dev_attr_max_current.attr,
+ NULL,
+};
+
+static struct attribute_group lp55xx_led_attr_group = {
+ .attrs = lp55xx_led_attributes
+};
+
+static void lp55xx_set_brightness(struct led_classdev *cdev,
+ enum led_brightness brightness)
+{
+ struct lp55xx_led *led = cdev_to_lp55xx_led(cdev);
+
+ led->brightness = (u8)brightness;
+ schedule_work(&led->brightness_work);
+}
+
+static int lp55xx_init_led(struct lp55xx_led *led,
+ struct lp55xx_chip *chip, int chan)
+{
+ struct lp55xx_platform_data *pdata = chip->pdata;
+ struct lp55xx_device_config *cfg = chip->cfg;
+ struct device *dev = &chip->cl->dev;
+ char name[32];
+ int ret;
+ int max_channel = cfg->max_channel;
+
+ if (chan >= max_channel) {
+ dev_err(dev, "invalid channel: %d / %d\n", chan, max_channel);
+ return -EINVAL;
+ }
+
+ if (pdata->led_config[chan].led_current == 0)
+ return 0;
+
+ led->led_current = pdata->led_config[chan].led_current;
+ led->max_current = pdata->led_config[chan].max_current;
+ led->chan_nr = pdata->led_config[chan].chan_nr;
+
+ if (led->chan_nr >= max_channel) {
+ dev_err(dev, "Use channel numbers between 0 and %d\n",
+ max_channel - 1);
+ return -EINVAL;
+ }
+
+ led->cdev.brightness_set = lp55xx_set_brightness;
+
+ if (pdata->led_config[chan].name) {
+ led->cdev.name = pdata->led_config[chan].name;
+ } else {
+ snprintf(name, sizeof(name), "%s:channel%d",
+ pdata->label ? : chip->cl->name, chan);
+ led->cdev.name = name;
+ }
+
+ /*
+ * register led class device for each channel and
+ * add device attributes
+ */
+
+ ret = led_classdev_register(dev, &led->cdev);
+ if (ret) {
+ dev_err(dev, "led register err: %d\n", ret);
+ return ret;
+ }
+
+ ret = sysfs_create_group(&led->cdev.dev->kobj, &lp55xx_led_attr_group);
+ if (ret) {
+ dev_err(dev, "led sysfs err: %d\n", ret);
+ led_classdev_unregister(&led->cdev);
+ return ret;
+ }
+
+ return 0;
+}
+
+static void lp55xx_firmware_loaded(const struct firmware *fw, void *context)
+{
+ struct lp55xx_chip *chip = context;
+ struct device *dev = &chip->cl->dev;
+
+ if (!fw) {
+ dev_err(dev, "firmware request failed\n");
+ goto out;
+ }
+
+ /* handling firmware data is chip dependent */
+ mutex_lock(&chip->lock);
+
+ chip->fw = fw;
+ if (chip->cfg->firmware_cb)
+ chip->cfg->firmware_cb(chip);
+
+ mutex_unlock(&chip->lock);
+
+out:
+ /* firmware should be released for other channel use */
+ release_firmware(chip->fw);
+}
+
+static int lp55xx_request_firmware(struct lp55xx_chip *chip)
+{
+ const char *name = chip->cl->name;
+ struct device *dev = &chip->cl->dev;
+
+ return request_firmware_nowait(THIS_MODULE, true, name, dev,
+ GFP_KERNEL, chip, lp55xx_firmware_loaded);
+}
+
+static ssize_t lp55xx_show_engine_select(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+
+ return sprintf(buf, "%d\n", chip->engine_idx);
+}
+
+static ssize_t lp55xx_store_engine_select(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ unsigned long val;
+ int ret;
+
+ if (kstrtoul(buf, 0, &val))
+ return -EINVAL;
+
+ /* select the engine to be run */
+
+ switch (val) {
+ case LP55XX_ENGINE_1:
+ case LP55XX_ENGINE_2:
+ case LP55XX_ENGINE_3:
+ mutex_lock(&chip->lock);
+ chip->engine_idx = val;
+ ret = lp55xx_request_firmware(chip);
+ mutex_unlock(&chip->lock);
+ break;
+ default:
+ dev_err(dev, "%lu: invalid engine index. (1, 2, 3)\n", val);
+ return -EINVAL;
+ }
+
+ if (ret) {
+ dev_err(dev, "request firmware err: %d\n", ret);
+ return ret;
+ }
+
+ return len;
+}
+
+static inline void lp55xx_run_engine(struct lp55xx_chip *chip, bool start)
+{
+ if (chip->cfg->run_engine)
+ chip->cfg->run_engine(chip, start);
+}
+
+static ssize_t lp55xx_store_engine_run(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ unsigned long val;
+
+ if (kstrtoul(buf, 0, &val))
+ return -EINVAL;
+
+ /* run or stop the selected engine */
+
+ if (val <= 0) {
+ lp55xx_run_engine(chip, false);
+ return len;
+ }
+
+ mutex_lock(&chip->lock);
+ lp55xx_run_engine(chip, true);
+ mutex_unlock(&chip->lock);
+
+ return len;
+}
+
+static DEVICE_ATTR(select_engine, S_IRUGO | S_IWUSR,
+ lp55xx_show_engine_select, lp55xx_store_engine_select);
+static DEVICE_ATTR(run_engine, S_IWUSR, NULL, lp55xx_store_engine_run);
+
+static struct attribute *lp55xx_engine_attributes[] = {
+ &dev_attr_select_engine.attr,
+ &dev_attr_run_engine.attr,
+ NULL,
+};
+
+static const struct attribute_group lp55xx_engine_attr_group = {
+ .attrs = lp55xx_engine_attributes,
+};
+
+int lp55xx_write(struct lp55xx_chip *chip, u8 reg, u8 val)
+{
+ return i2c_smbus_write_byte_data(chip->cl, reg, val);
+}
+EXPORT_SYMBOL_GPL(lp55xx_write);
+
+int lp55xx_read(struct lp55xx_chip *chip, u8 reg, u8 *val)
+{
+ s32 ret;
+
+ ret = i2c_smbus_read_byte_data(chip->cl, reg);
+ if (ret < 0)
+ return ret;
+
+ *val = ret;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(lp55xx_read);
+
+int lp55xx_update_bits(struct lp55xx_chip *chip, u8 reg, u8 mask, u8 val)
+{
+ int ret;
+ u8 tmp;
+
+ ret = lp55xx_read(chip, reg, &tmp);
+ if (ret)
+ return ret;
+
+ tmp &= ~mask;
+ tmp |= val & mask;
+
+ return lp55xx_write(chip, reg, tmp);
+}
+EXPORT_SYMBOL_GPL(lp55xx_update_bits);
+
+int lp55xx_init_device(struct lp55xx_chip *chip)
+{
+ struct lp55xx_platform_data *pdata;
+ struct lp55xx_device_config *cfg;
+ struct device *dev = &chip->cl->dev;
+ int ret = 0;
+
+ WARN_ON(!chip);
+
+ pdata = chip->pdata;
+ cfg = chip->cfg;
+
+ if (!pdata || !cfg)
+ return -EINVAL;
+
+ if (pdata->setup_resources) {
+ ret = pdata->setup_resources();
+ if (ret < 0) {
+ dev_err(dev, "setup resoure err: %d\n", ret);
+ goto err;
+ }
+ }
+
+ if (pdata->enable) {
+ pdata->enable(0);
+ usleep_range(1000, 2000); /* Keep enable down at least 1ms */
+ pdata->enable(1);
+ usleep_range(1000, 2000); /* 500us abs min. */
+ }
+
+ lp55xx_reset_device(chip);
+
+ /*
+ * Exact value is not available. 10 - 20ms
+ * appears to be enough for reset.
+ */
+ usleep_range(10000, 20000);
+
+ ret = lp55xx_detect_device(chip);
+ if (ret) {
+ dev_err(dev, "device detection err: %d\n", ret);
+ goto err;
+ }
+
+ /* chip specific initialization */
+ ret = lp55xx_post_init_device(chip);
+ if (ret) {
+ dev_err(dev, "post init device err: %d\n", ret);
+ goto err_post_init;
+ }
+
+ return 0;
+
+err_post_init:
+ lp55xx_deinit_device(chip);
+err:
+ return ret;
+}
+EXPORT_SYMBOL_GPL(lp55xx_init_device);
+
+void lp55xx_deinit_device(struct lp55xx_chip *chip)
+{
+ struct lp55xx_platform_data *pdata = chip->pdata;
+
+ if (pdata->enable)
+ pdata->enable(0);
+
+ if (pdata->release_resources)
+ pdata->release_resources();
+}
+EXPORT_SYMBOL_GPL(lp55xx_deinit_device);
+
+int lp55xx_register_leds(struct lp55xx_led *led, struct lp55xx_chip *chip)
+{
+ struct lp55xx_platform_data *pdata = chip->pdata;
+ struct lp55xx_device_config *cfg = chip->cfg;
+ int num_channels = pdata->num_channels;
+ struct lp55xx_led *each;
+ u8 led_current;
+ int ret;
+ int i;
+
+ if (!cfg->brightness_work_fn) {
+ dev_err(&chip->cl->dev, "empty brightness configuration\n");
+ return -EINVAL;
+ }
+
+ for (i = 0; i < num_channels; i++) {
+
+ /* do not initialize channels that are not connected */
+ if (pdata->led_config[i].led_current == 0)
+ continue;
+
+ led_current = pdata->led_config[i].led_current;
+ each = led + i;
+ ret = lp55xx_init_led(each, chip, i);
+ if (ret)
+ goto err_init_led;
+
+ INIT_WORK(&each->brightness_work, cfg->brightness_work_fn);
+
+ chip->num_leds++;
+ each->chip = chip;
+
+ /* setting led current at each channel */
+ if (cfg->set_led_current)
+ cfg->set_led_current(each, led_current);
+ }
+
+ return 0;
+
+err_init_led:
+ lp55xx_unregister_leds(led, chip);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(lp55xx_register_leds);
+
+void lp55xx_unregister_leds(struct lp55xx_led *led, struct lp55xx_chip *chip)
+{
+ int i;
+ struct lp55xx_led *each;
+
+ for (i = 0; i < chip->num_leds; i++) {
+ each = led + i;
+ led_classdev_unregister(&each->cdev);
+ flush_work(&each->brightness_work);
+ }
+}
+EXPORT_SYMBOL_GPL(lp55xx_unregister_leds);
+
+int lp55xx_register_sysfs(struct lp55xx_chip *chip)
+{
+ struct device *dev = &chip->cl->dev;
+ struct lp55xx_device_config *cfg = chip->cfg;
+ int ret;
+
+ if (!cfg->run_engine || !cfg->firmware_cb)
+ goto dev_specific_attrs;
+
+ ret = sysfs_create_group(&dev->kobj, &lp55xx_engine_attr_group);
+ if (ret)
+ return ret;
+
+dev_specific_attrs:
+ return cfg->dev_attr_group ?
+ sysfs_create_group(&dev->kobj, cfg->dev_attr_group) : 0;
+}
+EXPORT_SYMBOL_GPL(lp55xx_register_sysfs);
+
+void lp55xx_unregister_sysfs(struct lp55xx_chip *chip)
+{
+ struct device *dev = &chip->cl->dev;
+ struct lp55xx_device_config *cfg = chip->cfg;
+
+ if (cfg->dev_attr_group)
+ sysfs_remove_group(&dev->kobj, cfg->dev_attr_group);
+
+ sysfs_remove_group(&dev->kobj, &lp55xx_engine_attr_group);
+}
+EXPORT_SYMBOL_GPL(lp55xx_unregister_sysfs);
+
+MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>");
+MODULE_DESCRIPTION("LP55xx Common Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/leds/leds-lp55xx-common.h b/drivers/leds/leds-lp55xx-common.h
new file mode 100644
index 000000000000..ece4761a1302
--- /dev/null
+++ b/drivers/leds/leds-lp55xx-common.h
@@ -0,0 +1,134 @@
+/*
+ * LP55XX Common Driver Header
+ *
+ * Copyright (C) 2012 Texas Instruments
+ *
+ * Author: Milo(Woogyom) Kim <milo.kim@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * Derived from leds-lp5521.c, leds-lp5523.c
+ */
+
+#ifndef _LEDS_LP55XX_COMMON_H
+#define _LEDS_LP55XX_COMMON_H
+
+enum lp55xx_engine_index {
+ LP55XX_ENGINE_INVALID,
+ LP55XX_ENGINE_1,
+ LP55XX_ENGINE_2,
+ LP55XX_ENGINE_3,
+};
+
+struct lp55xx_led;
+struct lp55xx_chip;
+
+/*
+ * struct lp55xx_reg
+ * @addr : Register address
+ * @val : Register value
+ */
+struct lp55xx_reg {
+ u8 addr;
+ u8 val;
+};
+
+/*
+ * struct lp55xx_device_config
+ * @reset : Chip specific reset command
+ * @enable : Chip specific enable command
+ * @max_channel : Maximum number of channels
+ * @post_init_device : Chip specific initialization code
+ * @brightness_work_fn : Brightness work function
+ * @set_led_current : LED current set function
+ * @firmware_cb : Call function when the firmware is loaded
+ * @run_engine : Run internal engine for pattern
+ * @dev_attr_group : Device specific attributes
+ */
+struct lp55xx_device_config {
+ const struct lp55xx_reg reset;
+ const struct lp55xx_reg enable;
+ const int max_channel;
+
+ /* define if the device has specific initialization process */
+ int (*post_init_device) (struct lp55xx_chip *chip);
+
+ /* access brightness register */
+ void (*brightness_work_fn)(struct work_struct *work);
+
+ /* current setting function */
+ void (*set_led_current) (struct lp55xx_led *led, u8 led_current);
+
+ /* access program memory when the firmware is loaded */
+ void (*firmware_cb)(struct lp55xx_chip *chip);
+
+ /* used for running firmware LED patterns */
+ void (*run_engine) (struct lp55xx_chip *chip, bool start);
+
+ /* additional device specific attributes */
+ const struct attribute_group *dev_attr_group;
+};
+
+/*
+ * struct lp55xx_chip
+ * @cl : I2C communication for access registers
+ * @pdata : Platform specific data
+ * @lock : Lock for user-space interface
+ * @num_leds : Number of registered LEDs
+ * @cfg : Device specific configuration data
+ * @engine_idx : Selected engine number
+ * @fw : Firmware data for running a LED pattern
+ */
+struct lp55xx_chip {
+ struct i2c_client *cl;
+ struct lp55xx_platform_data *pdata;
+ struct mutex lock; /* lock for user-space interface */
+ int num_leds;
+ struct lp55xx_device_config *cfg;
+ enum lp55xx_engine_index engine_idx;
+ const struct firmware *fw;
+};
+
+/*
+ * struct lp55xx_led
+ * @chan_nr : Channel number
+ * @cdev : LED class device
+ * @led_current : Current setting at each led channel
+ * @max_current : Maximun current at each led channel
+ * @brightness_work : Workqueue for brightness control
+ * @brightness : Brightness value
+ * @chip : The lp55xx chip data
+ */
+struct lp55xx_led {
+ int chan_nr;
+ struct led_classdev cdev;
+ u8 led_current;
+ u8 max_current;
+ struct work_struct brightness_work;
+ u8 brightness;
+ struct lp55xx_chip *chip;
+};
+
+/* register access */
+extern int lp55xx_write(struct lp55xx_chip *chip, u8 reg, u8 val);
+extern int lp55xx_read(struct lp55xx_chip *chip, u8 reg, u8 *val);
+extern int lp55xx_update_bits(struct lp55xx_chip *chip, u8 reg,
+ u8 mask, u8 val);
+
+/* common device init/deinit functions */
+extern int lp55xx_init_device(struct lp55xx_chip *chip);
+extern void lp55xx_deinit_device(struct lp55xx_chip *chip);
+
+/* common LED class device functions */
+extern int lp55xx_register_leds(struct lp55xx_led *led,
+ struct lp55xx_chip *chip);
+extern void lp55xx_unregister_leds(struct lp55xx_led *led,
+ struct lp55xx_chip *chip);
+
+/* common device attributes functions */
+extern int lp55xx_register_sysfs(struct lp55xx_chip *chip);
+extern void lp55xx_unregister_sysfs(struct lp55xx_chip *chip);
+
+#endif /* _LEDS_LP55XX_COMMON_H */
diff --git a/drivers/leds/leds-lp8788.c b/drivers/leds/leds-lp8788.c
index 4353942c5fd1..7c2cb384e7ae 100644
--- a/drivers/leds/leds-lp8788.c
+++ b/drivers/leds/leds-lp8788.c
@@ -130,9 +130,10 @@ static int lp8788_led_probe(struct platform_device *pdev)
struct lp8788 *lp = dev_get_drvdata(pdev->dev.parent);
struct lp8788_led_platform_data *led_pdata;
struct lp8788_led *led;
+ struct device *dev = &pdev->dev;
int ret;
- led = devm_kzalloc(lp->dev, sizeof(struct lp8788_led), GFP_KERNEL);
+ led = devm_kzalloc(dev, sizeof(struct lp8788_led), GFP_KERNEL);
if (!led)
return -ENOMEM;
@@ -154,13 +155,13 @@ static int lp8788_led_probe(struct platform_device *pdev)
ret = lp8788_led_init_device(led, led_pdata);
if (ret) {
- dev_err(lp->dev, "led init device err: %d\n", ret);
+ dev_err(dev, "led init device err: %d\n", ret);
return ret;
}
- ret = led_classdev_register(lp->dev, &led->led_dev);
+ ret = led_classdev_register(dev, &led->led_dev);
if (ret) {
- dev_err(lp->dev, "led register err: %d\n", ret);
+ dev_err(dev, "led register err: %d\n", ret);
return ret;
}
diff --git a/drivers/leds/leds-pca9532.c b/drivers/leds/leds-pca9532.c
index cee8a5b483ac..0c597bdd23f9 100644
--- a/drivers/leds/leds-pca9532.c
+++ b/drivers/leds/leds-pca9532.c
@@ -186,7 +186,7 @@ static int pca9532_set_blink(struct led_classdev *led_cdev,
int err = 0;
if (*delay_on == 0 && *delay_off == 0) {
- /* led subsystem ask us for a blink rate */
+ /* led subsystem ask us for a blink rate */
*delay_on = 1000;
*delay_off = 1000;
}
@@ -311,7 +311,6 @@ static int pca9532_destroy_devices(struct pca9532_data *data, int n_devs)
break;
case PCA9532_TYPE_N2100_BEEP:
if (data->idev != NULL) {
- input_unregister_device(data->idev);
cancel_work_sync(&data->work);
data->idev = NULL;
}
@@ -382,7 +381,7 @@ static int pca9532_configure(struct i2c_client *client,
BUG_ON(data->idev);
led->state = PCA9532_PWM1;
pca9532_setled(led);
- data->idev = input_allocate_device();
+ data->idev = devm_input_allocate_device(&client->dev);
if (data->idev == NULL) {
err = -ENOMEM;
goto exit;
@@ -401,7 +400,6 @@ static int pca9532_configure(struct i2c_client *client,
INIT_WORK(&data->work, pca9532_input_work);
err = input_register_device(data->idev);
if (err) {
- input_free_device(data->idev);
cancel_work_sync(&data->work);
data->idev = NULL;
goto exit;
diff --git a/drivers/leds/leds-pwm.c b/drivers/leds/leds-pwm.c
index 2157524f277c..a1ea5f6a8d39 100644
--- a/drivers/leds/leds-pwm.c
+++ b/drivers/leds/leds-pwm.c
@@ -16,6 +16,7 @@
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
+#include <linux/of_platform.h>
#include <linux/fb.h>
#include <linux/leds.h>
#include <linux/err.h>
@@ -30,6 +31,11 @@ struct led_pwm_data {
unsigned int period;
};
+struct led_pwm_priv {
+ int num_leds;
+ struct led_pwm_data leds[0];
+};
+
static void led_pwm_set(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
@@ -47,88 +53,152 @@ static void led_pwm_set(struct led_classdev *led_cdev,
}
}
-static int led_pwm_probe(struct platform_device *pdev)
+static inline size_t sizeof_pwm_leds_priv(int num_leds)
{
- struct led_pwm_platform_data *pdata = pdev->dev.platform_data;
- struct led_pwm *cur_led;
- struct led_pwm_data *leds_data, *led_dat;
- int i, ret = 0;
+ return sizeof(struct led_pwm_priv) +
+ (sizeof(struct led_pwm_data) * num_leds);
+}
+
+static struct led_pwm_priv *led_pwm_create_of(struct platform_device *pdev)
+{
+ struct device_node *node = pdev->dev.of_node;
+ struct device_node *child;
+ struct led_pwm_priv *priv;
+ int count, ret;
- if (!pdata)
- return -EBUSY;
+ /* count LEDs in this device, so we know how much to allocate */
+ count = of_get_child_count(node);
+ if (!count)
+ return NULL;
- leds_data = devm_kzalloc(&pdev->dev,
- sizeof(struct led_pwm_data) * pdata->num_leds,
- GFP_KERNEL);
- if (!leds_data)
- return -ENOMEM;
+ priv = devm_kzalloc(&pdev->dev, sizeof_pwm_leds_priv(count),
+ GFP_KERNEL);
+ if (!priv)
+ return NULL;
- for (i = 0; i < pdata->num_leds; i++) {
- cur_led = &pdata->leds[i];
- led_dat = &leds_data[i];
+ for_each_child_of_node(node, child) {
+ struct led_pwm_data *led_dat = &priv->leds[priv->num_leds];
- led_dat->pwm = pwm_request(cur_led->pwm_id,
- cur_led->name);
+ led_dat->cdev.name = of_get_property(child, "label",
+ NULL) ? : child->name;
+
+ led_dat->pwm = devm_of_pwm_get(&pdev->dev, child, NULL);
if (IS_ERR(led_dat->pwm)) {
- ret = PTR_ERR(led_dat->pwm);
- dev_err(&pdev->dev, "unable to request PWM %d\n",
- cur_led->pwm_id);
+ dev_err(&pdev->dev, "unable to request PWM for %s\n",
+ led_dat->cdev.name);
goto err;
}
+ /* Get the period from PWM core when n*/
+ led_dat->period = pwm_get_period(led_dat->pwm);
+
+ led_dat->cdev.default_trigger = of_get_property(child,
+ "linux,default-trigger", NULL);
+ of_property_read_u32(child, "max-brightness",
+ &led_dat->cdev.max_brightness);
- led_dat->cdev.name = cur_led->name;
- led_dat->cdev.default_trigger = cur_led->default_trigger;
- led_dat->active_low = cur_led->active_low;
- led_dat->period = cur_led->pwm_period_ns;
led_dat->cdev.brightness_set = led_pwm_set;
led_dat->cdev.brightness = LED_OFF;
- led_dat->cdev.max_brightness = cur_led->max_brightness;
led_dat->cdev.flags |= LED_CORE_SUSPENDRESUME;
ret = led_classdev_register(&pdev->dev, &led_dat->cdev);
if (ret < 0) {
- pwm_free(led_dat->pwm);
+ dev_err(&pdev->dev, "failed to register for %s\n",
+ led_dat->cdev.name);
+ of_node_put(child);
goto err;
}
+ priv->num_leds++;
}
- platform_set_drvdata(pdev, leds_data);
+ return priv;
+err:
+ while (priv->num_leds--)
+ led_classdev_unregister(&priv->leds[priv->num_leds].cdev);
- return 0;
+ return NULL;
+}
-err:
- if (i > 0) {
- for (i = i - 1; i >= 0; i--) {
- led_classdev_unregister(&leds_data[i].cdev);
- pwm_free(leds_data[i].pwm);
+static int led_pwm_probe(struct platform_device *pdev)
+{
+ struct led_pwm_platform_data *pdata = pdev->dev.platform_data;
+ struct led_pwm_priv *priv;
+ int i, ret = 0;
+
+ if (pdata && pdata->num_leds) {
+ priv = devm_kzalloc(&pdev->dev,
+ sizeof_pwm_leds_priv(pdata->num_leds),
+ GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ for (i = 0; i < pdata->num_leds; i++) {
+ struct led_pwm *cur_led = &pdata->leds[i];
+ struct led_pwm_data *led_dat = &priv->leds[i];
+
+ led_dat->pwm = devm_pwm_get(&pdev->dev, cur_led->name);
+ if (IS_ERR(led_dat->pwm)) {
+ ret = PTR_ERR(led_dat->pwm);
+ dev_err(&pdev->dev,
+ "unable to request PWM for %s\n",
+ cur_led->name);
+ goto err;
+ }
+
+ led_dat->cdev.name = cur_led->name;
+ led_dat->cdev.default_trigger = cur_led->default_trigger;
+ led_dat->active_low = cur_led->active_low;
+ led_dat->period = cur_led->pwm_period_ns;
+ led_dat->cdev.brightness_set = led_pwm_set;
+ led_dat->cdev.brightness = LED_OFF;
+ led_dat->cdev.max_brightness = cur_led->max_brightness;
+ led_dat->cdev.flags |= LED_CORE_SUSPENDRESUME;
+
+ ret = led_classdev_register(&pdev->dev, &led_dat->cdev);
+ if (ret < 0)
+ goto err;
}
+ priv->num_leds = pdata->num_leds;
+ } else {
+ priv = led_pwm_create_of(pdev);
+ if (!priv)
+ return -ENODEV;
}
+ platform_set_drvdata(pdev, priv);
+
+ return 0;
+
+err:
+ while (i--)
+ led_classdev_unregister(&priv->leds[i].cdev);
+
return ret;
}
static int led_pwm_remove(struct platform_device *pdev)
{
+ struct led_pwm_priv *priv = platform_get_drvdata(pdev);
int i;
- struct led_pwm_platform_data *pdata = pdev->dev.platform_data;
- struct led_pwm_data *leds_data;
- leds_data = platform_get_drvdata(pdev);
-
- for (i = 0; i < pdata->num_leds; i++) {
- led_classdev_unregister(&leds_data[i].cdev);
- pwm_free(leds_data[i].pwm);
- }
+ for (i = 0; i < priv->num_leds; i++)
+ led_classdev_unregister(&priv->leds[i].cdev);
return 0;
}
+static const struct of_device_id of_pwm_leds_match[] = {
+ { .compatible = "pwm-leds", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, of_pwm_leds_match);
+
static struct platform_driver led_pwm_driver = {
.probe = led_pwm_probe,
.remove = led_pwm_remove,
.driver = {
.name = "leds_pwm",
.owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(of_pwm_leds_match),
},
};
diff --git a/drivers/leds/leds-renesas-tpu.c b/drivers/leds/leds-renesas-tpu.c
index e0fff1ca5923..d3c2b7e68fbc 100644
--- a/drivers/leds/leds-renesas-tpu.c
+++ b/drivers/leds/leds-renesas-tpu.c
@@ -133,24 +133,24 @@ static int r_tpu_enable(struct r_tpu_priv *p, enum led_brightness brightness)
rate = clk_get_rate(p->clk);
/* pick the lowest acceptable rate */
- for (k = 0; k < ARRAY_SIZE(prescaler); k++)
- if ((rate / prescaler[k]) < p->min_rate)
+ for (k = ARRAY_SIZE(prescaler) - 1; k >= 0; k--)
+ if ((rate / prescaler[k]) >= p->min_rate)
break;
- if (!k) {
+ if (k < 0) {
dev_err(&p->pdev->dev, "clock rate mismatch\n");
goto err0;
}
dev_dbg(&p->pdev->dev, "rate = %lu, prescaler %u\n",
- rate, prescaler[k - 1]);
+ rate, prescaler[k]);
/* clear TCNT on TGRB match, count on rising edge, set prescaler */
- r_tpu_write(p, TCR, 0x0040 | (k - 1));
+ r_tpu_write(p, TCR, 0x0040 | k);
/* output 0 until TGRA, output 1 until TGRB */
r_tpu_write(p, TIOR, 0x0002);
- rate /= prescaler[k - 1] * p->refresh_rate;
+ rate /= prescaler[k] * p->refresh_rate;
r_tpu_write(p, TGRB, rate);
dev_dbg(&p->pdev->dev, "TRGB = 0x%04lx\n", rate);
diff --git a/drivers/leds/leds-ss4200.c b/drivers/leds/leds-ss4200.c
index ec9b287ecfbf..64e204e714f6 100644
--- a/drivers/leds/leds-ss4200.c
+++ b/drivers/leds/leds-ss4200.c
@@ -63,8 +63,7 @@ MODULE_LICENSE("GPL");
/*
* PCI ID of the Intel ICH7 LPC Device within which the GPIO block lives.
*/
-static const struct pci_device_id ich7_lpc_pci_id[] =
-{
+static DEFINE_PCI_DEVICE_TABLE(ich7_lpc_pci_id) = {
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_0) },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_1) },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_30) },
diff --git a/drivers/leds/leds-sunfire.c b/drivers/leds/leds-sunfire.c
index 07ff5a3a6cee..89792990088d 100644
--- a/drivers/leds/leds-sunfire.c
+++ b/drivers/leds/leds-sunfire.c
@@ -3,6 +3,8 @@
* Copyright (C) 2008 David S. Miller <davem@davemloft.net>
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
@@ -14,9 +16,6 @@
#include <asm/fhc.h>
#include <asm/upa.h>
-#define DRIVER_NAME "leds-sunfire"
-#define PFX DRIVER_NAME ": "
-
MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
MODULE_DESCRIPTION("Sun Fire LED driver");
MODULE_LICENSE("GPL");
@@ -130,14 +129,14 @@ static int sunfire_led_generic_probe(struct platform_device *pdev,
int i, err;
if (pdev->num_resources != 1) {
- printk(KERN_ERR PFX "Wrong number of resources %d, should be 1\n",
+ dev_err(&pdev->dev, "Wrong number of resources %d, should be 1\n",
pdev->num_resources);
return -EINVAL;
}
p = devm_kzalloc(&pdev->dev, sizeof(*p), GFP_KERNEL);
if (!p) {
- printk(KERN_ERR PFX "Could not allocate struct sunfire_drvdata\n");
+ dev_err(&pdev->dev, "Could not allocate struct sunfire_drvdata\n");
return -ENOMEM;
}
@@ -152,7 +151,7 @@ static int sunfire_led_generic_probe(struct platform_device *pdev,
err = led_classdev_register(&pdev->dev, lp);
if (err) {
- printk(KERN_ERR PFX "Could not register %s LED\n",
+ dev_err(&pdev->dev, "Could not register %s LED\n",
lp->name);
for (i--; i >= 0; i--)
led_classdev_unregister(&p->leds[i].led_cdev);
@@ -188,7 +187,7 @@ static struct led_type clockboard_led_types[NUM_LEDS_PER_BOARD] = {
{
.name = "clockboard-right",
.handler = clockboard_right_set,
- .default_trigger= "heartbeat",
+ .default_trigger = "heartbeat",
},
};
@@ -209,7 +208,7 @@ static struct led_type fhc_led_types[NUM_LEDS_PER_BOARD] = {
{
.name = "fhc-right",
.handler = fhc_right_set,
- .default_trigger= "heartbeat",
+ .default_trigger = "heartbeat",
},
};
@@ -244,13 +243,13 @@ static int __init sunfire_leds_init(void)
int err = platform_driver_register(&sunfire_clockboard_led_driver);
if (err) {
- printk(KERN_ERR PFX "Could not register clock board LED driver\n");
+ pr_err("Could not register clock board LED driver\n");
return err;
}
err = platform_driver_register(&sunfire_fhc_led_driver);
if (err) {
- printk(KERN_ERR PFX "Could not register FHC LED driver\n");
+ pr_err("Could not register FHC LED driver\n");
platform_driver_unregister(&sunfire_clockboard_led_driver);
}
diff --git a/drivers/leds/leds-tca6507.c b/drivers/leds/leds-tca6507.c
index b26a63bae16b..070ba0741b21 100644
--- a/drivers/leds/leds-tca6507.c
+++ b/drivers/leds/leds-tca6507.c
@@ -667,8 +667,68 @@ static void tca6507_remove_gpio(struct tca6507_chip *tca)
}
#endif /* CONFIG_GPIOLIB */
+#ifdef CONFIG_OF
+static struct tca6507_platform_data *
+tca6507_led_dt_init(struct i2c_client *client)
+{
+ struct device_node *np = client->dev.of_node, *child;
+ struct tca6507_platform_data *pdata;
+ struct led_info *tca_leds;
+ int count;
+
+ count = of_get_child_count(np);
+ if (!count || count > NUM_LEDS)
+ return ERR_PTR(-ENODEV);
+
+ tca_leds = devm_kzalloc(&client->dev,
+ sizeof(struct led_info) * count, GFP_KERNEL);
+ if (!tca_leds)
+ return ERR_PTR(-ENOMEM);
+
+ for_each_child_of_node(np, child) {
+ struct led_info led;
+ u32 reg;
+ int ret;
+
+ led.name =
+ of_get_property(child, "label", NULL) ? : child->name;
+ led.default_trigger =
+ of_get_property(child, "linux,default-trigger", NULL);
+
+ ret = of_property_read_u32(child, "reg", &reg);
+ if (ret != 0)
+ continue;
+
+ tca_leds[reg] = led;
+ }
+ pdata = devm_kzalloc(&client->dev,
+ sizeof(struct tca6507_platform_data), GFP_KERNEL);
+ if (!pdata)
+ return ERR_PTR(-ENOMEM);
+
+ pdata->leds.leds = tca_leds;
+ pdata->leds.num_leds = count;
+
+ return pdata;
+}
+
+static const struct of_device_id of_tca6507_leds_match[] = {
+ { .compatible = "ti,tca6507", },
+ {},
+};
+
+#else
+static struct tca6507_platform_data *
+tca6507_led_dt_init(struct i2c_client *client)
+{
+ return ERR_PTR(-ENODEV);
+}
+
+#define of_tca6507_leds_match NULL
+#endif
+
static int tca6507_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
+ const struct i2c_device_id *id)
{
struct tca6507_chip *tca;
struct i2c_adapter *adapter;
@@ -683,9 +743,12 @@ static int tca6507_probe(struct i2c_client *client,
return -EIO;
if (!pdata || pdata->leds.num_leds != NUM_LEDS) {
- dev_err(&client->dev, "Need %d entries in platform-data list\n",
- NUM_LEDS);
- return -ENODEV;
+ pdata = tca6507_led_dt_init(client);
+ if (IS_ERR(pdata)) {
+ dev_err(&client->dev, "Need %d entries in platform-data list\n",
+ NUM_LEDS);
+ return PTR_ERR(pdata);
+ }
}
tca = devm_kzalloc(&client->dev, sizeof(*tca), GFP_KERNEL);
if (!tca)
@@ -750,6 +813,7 @@ static struct i2c_driver tca6507_driver = {
.driver = {
.name = "leds-tca6507",
.owner = THIS_MODULE,
+ .of_match_table = of_tca6507_leds_match,
},
.probe = tca6507_probe,
.remove = tca6507_remove,
diff --git a/drivers/leds/leds-wm831x-status.c b/drivers/leds/leds-wm831x-status.c
index 74a24cf897c3..6bd5c679d877 100644
--- a/drivers/leds/leds-wm831x-status.c
+++ b/drivers/leds/leds-wm831x-status.c
@@ -157,7 +157,7 @@ static int wm831x_status_blink_set(struct led_classdev *led_cdev,
return ret;
}
-static const char *led_src_texts[] = {
+static const char * const led_src_texts[] = {
"otp",
"power",
"charger",
diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index 903138b18842..4a13da48fefe 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -471,7 +471,7 @@ static struct pwm_chip *of_node_to_pwmchip(struct device_node *np)
}
/**
- * of_pwm_request() - request a PWM via the PWM framework
+ * of_pwm_get() - request a PWM via the PWM framework
* @np: device node to get the PWM from
* @con_id: consumer name
*
@@ -486,8 +486,7 @@ static struct pwm_chip *of_node_to_pwmchip(struct device_node *np)
* becomes mandatory for devices that look up the PWM device via the con_id
* parameter.
*/
-static struct pwm_device *of_pwm_request(struct device_node *np,
- const char *con_id)
+struct pwm_device *of_pwm_get(struct device_node *np, const char *con_id)
{
struct pwm_device *pwm = NULL;
struct of_phandle_args args;
@@ -545,6 +544,7 @@ put:
return pwm;
}
+EXPORT_SYMBOL_GPL(of_pwm_get);
/**
* pwm_add_table() - register PWM device consumers
@@ -587,7 +587,7 @@ struct pwm_device *pwm_get(struct device *dev, const char *con_id)
/* look up via DT first */
if (IS_ENABLED(CONFIG_OF) && dev && dev->of_node)
- return of_pwm_request(dev->of_node, con_id);
+ return of_pwm_get(dev->of_node, con_id);
/*
* We look up the provider in the static table typically provided by
@@ -708,6 +708,36 @@ struct pwm_device *devm_pwm_get(struct device *dev, const char *con_id)
}
EXPORT_SYMBOL_GPL(devm_pwm_get);
+/**
+ * devm_of_pwm_get() - resource managed of_pwm_get()
+ * @dev: device for PWM consumer
+ * @np: device node to get the PWM from
+ * @con_id: consumer name
+ *
+ * This function performs like of_pwm_get() but the acquired PWM device will
+ * automatically be released on driver detach.
+ */
+struct pwm_device *devm_of_pwm_get(struct device *dev, struct device_node *np,
+ const char *con_id)
+{
+ struct pwm_device **ptr, *pwm;
+
+ ptr = devres_alloc(devm_pwm_release, sizeof(**ptr), GFP_KERNEL);
+ if (!ptr)
+ return ERR_PTR(-ENOMEM);
+
+ pwm = of_pwm_get(np, con_id);
+ if (!IS_ERR(pwm)) {
+ *ptr = pwm;
+ devres_add(dev, ptr);
+ } else {
+ devres_free(ptr);
+ }
+
+ return pwm;
+}
+EXPORT_SYMBOL_GPL(devm_of_pwm_get);
+
static int devm_pwm_match(struct device *dev, void *res, void *data)
{
struct pwm_device **p = res;
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-24 21:31:17 +0000