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-rw-r--r--drivers/mfd/Kconfig13
-rw-r--r--drivers/mfd/Makefile1
-rw-r--r--drivers/mfd/max77686-irq.c309
-rw-r--r--drivers/mfd/max77686.c156
4 files changed, 479 insertions, 0 deletions
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index e129c820df7d..a7d0c851afc5 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -422,6 +422,19 @@ config PMIC_ADP5520
individual components like LCD backlight, LEDs, GPIOs and Kepad
under the corresponding menus.
+config MFD_MAX77686
+ bool "Maxim Semiconductor MAX77686 PMIC Support"
+ depends on I2C=y && GENERIC_HARDIRQS
+ select MFD_CORE
+ select REGMAP_I2C
+ select IRQ_DOMAIN
+ help
+ Say yes here to support for Maxim Semiconductor MAX77686.
+ This is a Power Management IC with RTC on chip.
+ This driver provides common support for accessing the device;
+ additional drivers must be enabled in order to use the functionality
+ of the device.
+
config MFD_MAX77693
bool "Maxim Semiconductor MAX77693 PMIC Support"
depends on I2C=y && GENERIC_HARDIRQS
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 75f6ed68a4b9..8ee7a3bf595b 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -78,6 +78,7 @@ obj-$(CONFIG_PMIC_DA9052) += da9052-core.o
obj-$(CONFIG_MFD_DA9052_SPI) += da9052-spi.o
obj-$(CONFIG_MFD_DA9052_I2C) += da9052-i2c.o
+obj-$(CONFIG_MFD_MAX77686) += max77686.o max77686-irq.o
obj-$(CONFIG_MFD_MAX77693) += max77693.o max77693-irq.o
max8925-objs := max8925-core.o max8925-i2c.o
obj-$(CONFIG_MFD_MAX8925) += max8925.o
diff --git a/drivers/mfd/max77686-irq.c b/drivers/mfd/max77686-irq.c
new file mode 100644
index 000000000000..fc101220f990
--- /dev/null
+++ b/drivers/mfd/max77686-irq.c
@@ -0,0 +1,309 @@
+/*
+ * max77686-irq.c - Interrupt controller support for MAX77686
+ *
+ * Copyright (C) 2012 Samsung Electronics Co.Ltd
+ * Chiwoong Byun <woong.byun@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * This driver is based on max8997-irq.c
+ */
+
+#include <linux/err.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/gpio.h>
+#include <linux/mfd/max77686.h>
+#include <linux/mfd/max77686-private.h>
+#include <linux/irqdomain.h>
+#include <linux/regmap.h>
+
+enum {
+ MAX77686_DEBUG_IRQ_INFO = 1 << 0,
+ MAX77686_DEBUG_IRQ_MASK = 1 << 1,
+ MAX77686_DEBUG_IRQ_INT = 1 << 2,
+};
+
+static int debug_mask = 0;
+module_param(debug_mask, int, 0);
+MODULE_PARM_DESC(debug_mask, "Set debug_mask : 0x0=off 0x1=IRQ_INFO 0x2=IRQ_MASK 0x4=IRQ_INI)");
+
+static const u8 max77686_mask_reg[] = {
+ [PMIC_INT1] = MAX77686_REG_INT1MSK,
+ [PMIC_INT2] = MAX77686_REG_INT2MSK,
+ [RTC_INT] = MAX77686_RTC_INTM,
+};
+
+static struct regmap *max77686_get_regmap(struct max77686_dev *max77686,
+ enum max77686_irq_source src)
+{
+ switch (src) {
+ case PMIC_INT1 ... PMIC_INT2:
+ return max77686->regmap;
+ case RTC_INT:
+ return max77686->rtc_regmap;
+ default:
+ return ERR_PTR(-EINVAL);
+ }
+}
+
+struct max77686_irq_data {
+ int mask;
+ enum max77686_irq_source group;
+};
+
+#define DECLARE_IRQ(idx, _group, _mask) \
+ [(idx)] = { .group = (_group), .mask = (_mask) }
+static const struct max77686_irq_data max77686_irqs[] = {
+ DECLARE_IRQ(MAX77686_PMICIRQ_PWRONF, PMIC_INT1, 1 << 0),
+ DECLARE_IRQ(MAX77686_PMICIRQ_PWRONR, PMIC_INT1, 1 << 1),
+ DECLARE_IRQ(MAX77686_PMICIRQ_JIGONBF, PMIC_INT1, 1 << 2),
+ DECLARE_IRQ(MAX77686_PMICIRQ_JIGONBR, PMIC_INT1, 1 << 3),
+ DECLARE_IRQ(MAX77686_PMICIRQ_ACOKBF, PMIC_INT1, 1 << 4),
+ DECLARE_IRQ(MAX77686_PMICIRQ_ACOKBR, PMIC_INT1, 1 << 5),
+ DECLARE_IRQ(MAX77686_PMICIRQ_ONKEY1S, PMIC_INT1, 1 << 6),
+ DECLARE_IRQ(MAX77686_PMICIRQ_MRSTB, PMIC_INT1, 1 << 7),
+ DECLARE_IRQ(MAX77686_PMICIRQ_140C, PMIC_INT2, 1 << 0),
+ DECLARE_IRQ(MAX77686_PMICIRQ_120C, PMIC_INT2, 1 << 1),
+ DECLARE_IRQ(MAX77686_RTCIRQ_RTC60S, RTC_INT, 1 << 0),
+ DECLARE_IRQ(MAX77686_RTCIRQ_RTCA1, RTC_INT, 1 << 1),
+ DECLARE_IRQ(MAX77686_RTCIRQ_RTCA2, RTC_INT, 1 << 2),
+ DECLARE_IRQ(MAX77686_RTCIRQ_SMPL, RTC_INT, 1 << 3),
+ DECLARE_IRQ(MAX77686_RTCIRQ_RTC1S, RTC_INT, 1 << 4),
+ DECLARE_IRQ(MAX77686_RTCIRQ_WTSR, RTC_INT, 1 << 5),
+};
+
+static void max77686_irq_lock(struct irq_data *data)
+{
+ struct max77686_dev *max77686 = irq_get_chip_data(data->irq);
+
+ if (debug_mask & MAX77686_DEBUG_IRQ_MASK)
+ pr_info("%s\n", __func__);
+
+ mutex_lock(&max77686->irqlock);
+}
+
+static void max77686_irq_sync_unlock(struct irq_data *data)
+{
+ struct max77686_dev *max77686 = irq_get_chip_data(data->irq);
+ int i;
+
+ for (i = 0; i < MAX77686_IRQ_GROUP_NR; i++) {
+ u8 mask_reg = max77686_mask_reg[i];
+ struct regmap *map = max77686_get_regmap(max77686, i);
+
+ if (debug_mask & MAX77686_DEBUG_IRQ_MASK)
+ pr_debug("%s: mask_reg[%d]=0x%x, cur=0x%x\n",
+ __func__, i, mask_reg, max77686->irq_masks_cur[i]);
+
+ if (mask_reg == MAX77686_REG_INVALID ||
+ IS_ERR_OR_NULL(map))
+ continue;
+
+ max77686->irq_masks_cache[i] = max77686->irq_masks_cur[i];
+
+ regmap_write(map, max77686_mask_reg[i],
+ max77686->irq_masks_cur[i]);
+ }
+
+ mutex_unlock(&max77686->irqlock);
+}
+
+static const inline struct max77686_irq_data *to_max77686_irq(int irq)
+{
+ struct irq_data *data = irq_get_irq_data(irq);
+ return &max77686_irqs[data->hwirq];
+}
+
+static void max77686_irq_mask(struct irq_data *data)
+{
+ struct max77686_dev *max77686 = irq_get_chip_data(data->irq);
+ const struct max77686_irq_data *irq_data = to_max77686_irq(data->irq);
+
+ max77686->irq_masks_cur[irq_data->group] |= irq_data->mask;
+
+ if (debug_mask & MAX77686_DEBUG_IRQ_MASK)
+ pr_info("%s: group=%d, cur=0x%x\n",
+ __func__, irq_data->group,
+ max77686->irq_masks_cur[irq_data->group]);
+}
+
+static void max77686_irq_unmask(struct irq_data *data)
+{
+ struct max77686_dev *max77686 = irq_get_chip_data(data->irq);
+ const struct max77686_irq_data *irq_data = to_max77686_irq(data->irq);
+
+ max77686->irq_masks_cur[irq_data->group] &= ~irq_data->mask;
+
+ if (debug_mask & MAX77686_DEBUG_IRQ_MASK)
+ pr_info("%s: group=%d, cur=0x%x\n",
+ __func__, irq_data->group,
+ max77686->irq_masks_cur[irq_data->group]);
+}
+
+static struct irq_chip max77686_irq_chip = {
+ .name = "max77686",
+ .irq_bus_lock = max77686_irq_lock,
+ .irq_bus_sync_unlock = max77686_irq_sync_unlock,
+ .irq_mask = max77686_irq_mask,
+ .irq_unmask = max77686_irq_unmask,
+};
+
+static irqreturn_t max77686_irq_thread(int irq, void *data)
+{
+ struct max77686_dev *max77686 = data;
+ unsigned int irq_reg[MAX77686_IRQ_GROUP_NR] = {};
+ unsigned int irq_src;
+ int ret;
+ int i, cur_irq;
+
+ ret = regmap_read(max77686->regmap, MAX77686_REG_INTSRC, &irq_src);
+ if (ret < 0) {
+ dev_err(max77686->dev, "Failed to read interrupt source: %d\n",
+ ret);
+ return IRQ_NONE;
+ }
+
+ if (debug_mask & MAX77686_DEBUG_IRQ_INT)
+ pr_info("%s: irq_src=0x%x\n", __func__, irq_src);
+
+ if (irq_src == MAX77686_IRQSRC_PMIC) {
+ ret = regmap_bulk_read(max77686->rtc_regmap,
+ MAX77686_REG_INT1, irq_reg, 2);
+ if (ret < 0) {
+ dev_err(max77686->dev, "Failed to read interrupt source: %d\n",
+ ret);
+ return IRQ_NONE;
+ }
+
+ if (debug_mask & MAX77686_DEBUG_IRQ_INT)
+ pr_info("%s: int1=0x%x, int2=0x%x\n", __func__,
+ irq_reg[PMIC_INT1], irq_reg[PMIC_INT2]);
+ }
+
+ if (irq_src & MAX77686_IRQSRC_RTC) {
+ ret = regmap_read(max77686->rtc_regmap,
+ MAX77686_RTC_INT, &irq_reg[RTC_INT]);
+ if (ret < 0) {
+ dev_err(max77686->dev, "Failed to read interrupt source: %d\n",
+ ret);
+ return IRQ_NONE;
+ }
+
+ if (debug_mask & MAX77686_DEBUG_IRQ_INT)
+ pr_info("%s: rtc int=0x%x\n", __func__,
+ irq_reg[RTC_INT]);
+
+ }
+
+ for (i = 0; i < MAX77686_IRQ_NR; i++) {
+ if (irq_reg[max77686_irqs[i].group] & max77686_irqs[i].mask) {
+ cur_irq = irq_find_mapping(max77686->irq_domain, i);
+ if (cur_irq)
+ handle_nested_irq(cur_irq);
+ }
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int max77686_irq_domain_map(struct irq_domain *d, unsigned int irq,
+ irq_hw_number_t hw)
+{
+ struct max77686_dev *max77686 = d->host_data;
+
+ irq_set_chip_data(irq, max77686);
+ irq_set_chip_and_handler(irq, &max77686_irq_chip, handle_edge_irq);
+ irq_set_nested_thread(irq, 1);
+#ifdef CONFIG_ARM
+ set_irq_flags(irq, IRQF_VALID);
+#else
+ irq_set_noprobe(irq);
+#endif
+ return 0;
+}
+
+static struct irq_domain_ops max77686_irq_domain_ops = {
+ .map = max77686_irq_domain_map,
+};
+
+int max77686_irq_init(struct max77686_dev *max77686)
+{
+ struct irq_domain *domain;
+ int i;
+ int ret;
+ int val;
+ struct regmap *map;
+
+ mutex_init(&max77686->irqlock);
+
+ max77686->irq = gpio_to_irq(max77686->irq_gpio);
+
+ if (debug_mask & MAX77686_DEBUG_IRQ_INT) {
+ ret = gpio_request(max77686->irq_gpio, "pmic_irq");
+ if (ret < 0) {
+ dev_err(max77686->dev,
+ "Failed to request gpio %d with ret: %d\n",
+ max77686->irq_gpio, ret);
+ return IRQ_NONE;
+ }
+
+ gpio_direction_input(max77686->irq_gpio);
+ val = gpio_get_value(max77686->irq_gpio);
+ gpio_free(max77686->irq_gpio);
+ pr_info("%s: gpio_irq=%x\n", __func__, val);
+ }
+
+ /* Mask individual interrupt sources */
+ for (i = 0; i < MAX77686_IRQ_GROUP_NR; i++) {
+ max77686->irq_masks_cur[i] = 0xff;
+ max77686->irq_masks_cache[i] = 0xff;
+ map = max77686_get_regmap(max77686, i);
+
+ if (IS_ERR_OR_NULL(map))
+ continue;
+ if (max77686_mask_reg[i] == MAX77686_REG_INVALID)
+ continue;
+
+ regmap_write(map, max77686_mask_reg[i], 0xff);
+ }
+ domain = irq_domain_add_linear(NULL, MAX77686_IRQ_NR,
+ &max77686_irq_domain_ops, max77686);
+ if (!domain) {
+ dev_err(max77686->dev, "could not create irq domain\n");
+ return -ENODEV;
+ }
+ max77686->irq_domain = domain;
+
+ ret = request_threaded_irq(max77686->irq, NULL, max77686_irq_thread,
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+ "max77686-irq", max77686);
+
+ if (ret)
+ dev_err(max77686->dev, "Failed to request IRQ %d: %d\n",
+ max77686->irq, ret);
+
+
+ if (debug_mask & MAX77686_DEBUG_IRQ_INFO)
+ pr_info("%s-\n", __func__);
+
+ return 0;
+}
+
+void max77686_irq_exit(struct max77686_dev *max77686)
+{
+ if (max77686->irq)
+ free_irq(max77686->irq, max77686);
+}
diff --git a/drivers/mfd/max77686.c b/drivers/mfd/max77686.c
new file mode 100644
index 000000000000..11e56017e0b0
--- /dev/null
+++ b/drivers/mfd/max77686.c
@@ -0,0 +1,156 @@
+/*
+ * max77686.c - mfd core driver for the Maxim 77686
+ *
+ * Copyright (C) 2012 Samsung Electronics
+ * Chiwoong Byun <woong.byun@smasung.com>
+ * Jonghwa Lee <jonghwa3.lee@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * This driver is based on max8997.c
+ */
+
+#include <linux/export.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/pm_runtime.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/max77686.h>
+#include <linux/mfd/max77686-private.h>
+#include <linux/err.h>
+
+#define I2C_ADDR_RTC (0x0C >> 1)
+
+static struct mfd_cell max77686_devs[] = {
+ { .name = "max77686-pmic", },
+ { .name = "max77686-rtc", },
+};
+
+static struct regmap_config max77686_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+};
+
+static int max77686_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct max77686_dev *max77686;
+ struct max77686_platform_data *pdata = i2c->dev.platform_data;
+ unsigned int data;
+ int ret = 0;
+
+ max77686 = kzalloc(sizeof(struct max77686_dev), GFP_KERNEL);
+ if (max77686 == NULL)
+ return -ENOMEM;
+
+ max77686->regmap = regmap_init_i2c(i2c, &max77686_regmap_config);
+ if (IS_ERR(max77686->regmap)) {
+ ret = PTR_ERR(max77686->regmap);
+ dev_err(max77686->dev, "Failed to allocate register map: %d\n",
+ ret);
+ kfree(max77686);
+ return ret;
+ }
+
+ i2c_set_clientdata(i2c, max77686);
+ max77686->dev = &i2c->dev;
+ max77686->i2c = i2c;
+ max77686->type = id->driver_data;
+
+ if (!pdata) {
+ ret = -EIO;
+ goto err;
+ }
+
+ max77686->wakeup = pdata->wakeup;
+ max77686->irq_gpio = pdata->irq_gpio;
+
+ mutex_init(&max77686->iolock);
+
+ if (regmap_read(max77686->regmap,
+ MAX77686_REG_DEVICE_ID, &data) < 0) {
+ dev_err(max77686->dev,
+ "device not found on this channel (this is not an error)\n");
+ ret = -ENODEV;
+ goto err;
+ } else
+ dev_info(max77686->dev, "device found\n");
+
+ max77686->rtc = i2c_new_dummy(i2c->adapter, I2C_ADDR_RTC);
+ i2c_set_clientdata(max77686->rtc, max77686);
+
+ max77686_irq_init(max77686);
+
+ ret = mfd_add_devices(max77686->dev, -1, max77686_devs,
+ ARRAY_SIZE(max77686_devs), NULL, 0);
+
+ if (ret < 0)
+ goto err_mfd;
+
+ return ret;
+
+err_mfd:
+ mfd_remove_devices(max77686->dev);
+ i2c_unregister_device(max77686->rtc);
+err:
+ kfree(max77686);
+ return ret;
+}
+
+static int max77686_i2c_remove(struct i2c_client *i2c)
+{
+ struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
+
+ mfd_remove_devices(max77686->dev);
+ i2c_unregister_device(max77686->rtc);
+ kfree(max77686);
+
+ return 0;
+}
+
+static const struct i2c_device_id max77686_i2c_id[] = {
+ { "max77686", TYPE_MAX77686 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, max77686_i2c_id);
+
+static struct i2c_driver max77686_i2c_driver = {
+ .driver = {
+ .name = "max77686",
+ .owner = THIS_MODULE,
+ },
+ .probe = max77686_i2c_probe,
+ .remove = max77686_i2c_remove,
+ .id_table = max77686_i2c_id,
+};
+
+static int __init max77686_i2c_init(void)
+{
+ return i2c_add_driver(&max77686_i2c_driver);
+}
+/* init early so consumer devices can complete system boot */
+subsys_initcall(max77686_i2c_init);
+
+static void __exit max77686_i2c_exit(void)
+{
+ i2c_del_driver(&max77686_i2c_driver);
+}
+module_exit(max77686_i2c_exit);
+
+MODULE_DESCRIPTION("MAXIM 77686 multi-function core driver");
+MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-20 22:38:21 +0000