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-rw-r--r--drivers/thermal/Kconfig14
-rw-r--r--drivers/thermal/Makefile3
-rw-r--r--drivers/thermal/armada_thermal.c6
-rw-r--r--drivers/thermal/devfreq_cooling.c569
-rw-r--r--drivers/thermal/imx_thermal.c21
-rw-r--r--drivers/thermal/rockchip_thermal.c38
-rw-r--r--drivers/thermal/ti-soc-thermal/Kconfig15
-rw-r--r--drivers/thermal/ti-soc-thermal/Makefile1
-rw-r--r--drivers/thermal/ti-soc-thermal/omap3-thermal-data.c176
-rw-r--r--drivers/thermal/ti-soc-thermal/ti-bandgap.c14
-rw-r--r--drivers/thermal/ti-soc-thermal/ti-bandgap.h11
11 files changed, 835 insertions, 33 deletions
diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
index 5aabc4bc0d75..90629f69bb22 100644
--- a/drivers/thermal/Kconfig
+++ b/drivers/thermal/Kconfig
@@ -147,6 +147,20 @@ config CLOCK_THERMAL
device that is configured to use this cooling mechanism will be
controlled to reduce clock frequency whenever temperature is high.
+config DEVFREQ_THERMAL
+ bool "Generic device cooling support"
+ depends on PM_DEVFREQ
+ depends on PM_OPP
+ help
+ This implements the generic devfreq cooling mechanism through
+ frequency reduction for devices using devfreq.
+
+ This will throttle the device by limiting the maximum allowed DVFS
+ frequency corresponding to the cooling level.
+
+ In order to use the power extensions of the cooling device,
+ devfreq should use the simple_ondemand governor.
+
If you want this support, you should say Y here.
config THERMAL_EMULATION
diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile
index 26f160809959..cfae6a654793 100644
--- a/drivers/thermal/Makefile
+++ b/drivers/thermal/Makefile
@@ -22,6 +22,9 @@ thermal_sys-$(CONFIG_CPU_THERMAL) += cpu_cooling.o
# clock cooling
thermal_sys-$(CONFIG_CLOCK_THERMAL) += clock_cooling.o
+# devfreq cooling
+thermal_sys-$(CONFIG_DEVFREQ_THERMAL) += devfreq_cooling.o
+
# platform thermal drivers
obj-$(CONFIG_QCOM_SPMI_TEMP_ALARM) += qcom-spmi-temp-alarm.o
obj-$(CONFIG_SPEAR_THERMAL) += spear_thermal.o
diff --git a/drivers/thermal/armada_thermal.c b/drivers/thermal/armada_thermal.c
index 26b8d326546a..ae75328945f7 100644
--- a/drivers/thermal/armada_thermal.c
+++ b/drivers/thermal/armada_thermal.c
@@ -224,9 +224,9 @@ static const struct armada_thermal_data armada380_data = {
.is_valid_shift = 10,
.temp_shift = 0,
.temp_mask = 0x3ff,
- .coef_b = 2931108200UL,
- .coef_m = 5000000UL,
- .coef_div = 10502,
+ .coef_b = 1172499100UL,
+ .coef_m = 2000096UL,
+ .coef_div = 4201,
.inverted = true,
};
diff --git a/drivers/thermal/devfreq_cooling.c b/drivers/thermal/devfreq_cooling.c
new file mode 100644
index 000000000000..a27206815066
--- /dev/null
+++ b/drivers/thermal/devfreq_cooling.c
@@ -0,0 +1,569 @@
+/*
+ * devfreq_cooling: Thermal cooling device implementation for devices using
+ * devfreq
+ *
+ * Copyright (C) 2014-2015 ARM Limited
+ *
+ * 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.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * TODO:
+ * - If OPPs are added or removed after devfreq cooling has
+ * registered, the devfreq cooling won't react to it.
+ */
+
+#include <linux/devfreq.h>
+#include <linux/devfreq_cooling.h>
+#include <linux/export.h>
+#include <linux/slab.h>
+#include <linux/pm_opp.h>
+#include <linux/thermal.h>
+
+#include <trace/events/thermal.h>
+
+static DEFINE_MUTEX(devfreq_lock);
+static DEFINE_IDR(devfreq_idr);
+
+/**
+ * struct devfreq_cooling_device - Devfreq cooling device
+ * @id: unique integer value corresponding to each
+ * devfreq_cooling_device registered.
+ * @cdev: Pointer to associated thermal cooling device.
+ * @devfreq: Pointer to associated devfreq device.
+ * @cooling_state: Current cooling state.
+ * @power_table: Pointer to table with maximum power draw for each
+ * cooling state. State is the index into the table, and
+ * the power is in mW.
+ * @freq_table: Pointer to a table with the frequencies sorted in descending
+ * order. You can index the table by cooling device state
+ * @freq_table_size: Size of the @freq_table and @power_table
+ * @power_ops: Pointer to devfreq_cooling_power, used to generate the
+ * @power_table.
+ */
+struct devfreq_cooling_device {
+ int id;
+ struct thermal_cooling_device *cdev;
+ struct devfreq *devfreq;
+ unsigned long cooling_state;
+ u32 *power_table;
+ u32 *freq_table;
+ size_t freq_table_size;
+ struct devfreq_cooling_power *power_ops;
+};
+
+/**
+ * get_idr - function to get a unique id.
+ * @idr: struct idr * handle used to create a id.
+ * @id: int * value generated by this function.
+ *
+ * This function will populate @id with an unique
+ * id, using the idr API.
+ *
+ * Return: 0 on success, an error code on failure.
+ */
+static int get_idr(struct idr *idr, int *id)
+{
+ int ret;
+
+ mutex_lock(&devfreq_lock);
+ ret = idr_alloc(idr, NULL, 0, 0, GFP_KERNEL);
+ mutex_unlock(&devfreq_lock);
+ if (unlikely(ret < 0))
+ return ret;
+ *id = ret;
+
+ return 0;
+}
+
+/**
+ * release_idr - function to free the unique id.
+ * @idr: struct idr * handle used for creating the id.
+ * @id: int value representing the unique id.
+ */
+static void release_idr(struct idr *idr, int id)
+{
+ mutex_lock(&devfreq_lock);
+ idr_remove(idr, id);
+ mutex_unlock(&devfreq_lock);
+}
+
+/**
+ * partition_enable_opps() - disable all opps above a given state
+ * @dfc: Pointer to devfreq we are operating on
+ * @cdev_state: cooling device state we're setting
+ *
+ * Go through the OPPs of the device, enabling all OPPs until
+ * @cdev_state and disabling those frequencies above it.
+ */
+static int partition_enable_opps(struct devfreq_cooling_device *dfc,
+ unsigned long cdev_state)
+{
+ int i;
+ struct device *dev = dfc->devfreq->dev.parent;
+
+ for (i = 0; i < dfc->freq_table_size; i++) {
+ struct dev_pm_opp *opp;
+ int ret = 0;
+ unsigned int freq = dfc->freq_table[i];
+ bool want_enable = i >= cdev_state ? true : false;
+
+ rcu_read_lock();
+ opp = dev_pm_opp_find_freq_exact(dev, freq, !want_enable);
+ rcu_read_unlock();
+
+ if (PTR_ERR(opp) == -ERANGE)
+ continue;
+ else if (IS_ERR(opp))
+ return PTR_ERR(opp);
+
+ if (want_enable)
+ ret = dev_pm_opp_enable(dev, freq);
+ else
+ ret = dev_pm_opp_disable(dev, freq);
+
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int devfreq_cooling_get_max_state(struct thermal_cooling_device *cdev,
+ unsigned long *state)
+{
+ struct devfreq_cooling_device *dfc = cdev->devdata;
+
+ *state = dfc->freq_table_size - 1;
+
+ return 0;
+}
+
+static int devfreq_cooling_get_cur_state(struct thermal_cooling_device *cdev,
+ unsigned long *state)
+{
+ struct devfreq_cooling_device *dfc = cdev->devdata;
+
+ *state = dfc->cooling_state;
+
+ return 0;
+}
+
+static int devfreq_cooling_set_cur_state(struct thermal_cooling_device *cdev,
+ unsigned long state)
+{
+ struct devfreq_cooling_device *dfc = cdev->devdata;
+ struct devfreq *df = dfc->devfreq;
+ struct device *dev = df->dev.parent;
+ int ret;
+
+ if (state == dfc->cooling_state)
+ return 0;
+
+ dev_dbg(dev, "Setting cooling state %lu\n", state);
+
+ if (state >= dfc->freq_table_size)
+ return -EINVAL;
+
+ ret = partition_enable_opps(dfc, state);
+ if (ret)
+ return ret;
+
+ dfc->cooling_state = state;
+
+ return 0;
+}
+
+/**
+ * freq_get_state() - get the cooling state corresponding to a frequency
+ * @dfc: Pointer to devfreq cooling device
+ * @freq: frequency in Hz
+ *
+ * Return: the cooling state associated with the @freq, or
+ * THERMAL_CSTATE_INVALID if it wasn't found.
+ */
+static unsigned long
+freq_get_state(struct devfreq_cooling_device *dfc, unsigned long freq)
+{
+ int i;
+
+ for (i = 0; i < dfc->freq_table_size; i++) {
+ if (dfc->freq_table[i] == freq)
+ return i;
+ }
+
+ return THERMAL_CSTATE_INVALID;
+}
+
+/**
+ * get_static_power() - calculate the static power
+ * @dfc: Pointer to devfreq cooling device
+ * @freq: Frequency in Hz
+ *
+ * Calculate the static power in milliwatts using the supplied
+ * get_static_power(). The current voltage is calculated using the
+ * OPP library. If no get_static_power() was supplied, assume the
+ * static power is negligible.
+ */
+static unsigned long
+get_static_power(struct devfreq_cooling_device *dfc, unsigned long freq)
+{
+ struct devfreq *df = dfc->devfreq;
+ struct device *dev = df->dev.parent;
+ unsigned long voltage;
+ struct dev_pm_opp *opp;
+
+ if (!dfc->power_ops->get_static_power)
+ return 0;
+
+ rcu_read_lock();
+
+ opp = dev_pm_opp_find_freq_exact(dev, freq, true);
+ if (IS_ERR(opp) && (PTR_ERR(opp) == -ERANGE))
+ opp = dev_pm_opp_find_freq_exact(dev, freq, false);
+
+ voltage = dev_pm_opp_get_voltage(opp) / 1000; /* mV */
+
+ rcu_read_unlock();
+
+ if (voltage == 0) {
+ dev_warn_ratelimited(dev,
+ "Failed to get voltage for frequency %lu: %ld\n",
+ freq, IS_ERR(opp) ? PTR_ERR(opp) : 0);
+ return 0;
+ }
+
+ return dfc->power_ops->get_static_power(voltage);
+}
+
+/**
+ * get_dynamic_power - calculate the dynamic power
+ * @dfc: Pointer to devfreq cooling device
+ * @freq: Frequency in Hz
+ * @voltage: Voltage in millivolts
+ *
+ * Calculate the dynamic power in milliwatts consumed by the device at
+ * frequency @freq and voltage @voltage. If the get_dynamic_power()
+ * was supplied as part of the devfreq_cooling_power struct, then that
+ * function is used. Otherwise, a simple power model (Pdyn = Coeff *
+ * Voltage^2 * Frequency) is used.
+ */
+static unsigned long
+get_dynamic_power(struct devfreq_cooling_device *dfc, unsigned long freq,
+ unsigned long voltage)
+{
+ unsigned long power;
+ u32 freq_mhz;
+ struct devfreq_cooling_power *dfc_power = dfc->power_ops;
+
+ if (dfc_power->get_dynamic_power)
+ return dfc_power->get_dynamic_power(freq, voltage);
+
+ freq_mhz = freq / 1000000;
+ power = (u64)dfc_power->dyn_power_coeff * freq_mhz * voltage * voltage;
+ do_div(power, 1000000000);
+
+ return power;
+}
+
+static int devfreq_cooling_get_requested_power(struct thermal_cooling_device *cdev,
+ struct thermal_zone_device *tz,
+ u32 *power)
+{
+ struct devfreq_cooling_device *dfc = cdev->devdata;
+ struct devfreq *df = dfc->devfreq;
+ struct devfreq_dev_status *status = &df->last_status;
+ unsigned long state;
+ unsigned long freq = status->current_frequency;
+ u32 dyn_power, static_power;
+
+ /* Get dynamic power for state */
+ state = freq_get_state(dfc, freq);
+ if (state == THERMAL_CSTATE_INVALID)
+ return -EAGAIN;
+
+ dyn_power = dfc->power_table[state];
+
+ /* Scale dynamic power for utilization */
+ dyn_power = (dyn_power * status->busy_time) / status->total_time;
+
+ /* Get static power */
+ static_power = get_static_power(dfc, freq);
+
+ trace_thermal_power_devfreq_get_power(cdev, status, freq, dyn_power,
+ static_power);
+
+ *power = dyn_power + static_power;
+
+ return 0;
+}
+
+static int devfreq_cooling_state2power(struct thermal_cooling_device *cdev,
+ struct thermal_zone_device *tz,
+ unsigned long state,
+ u32 *power)
+{
+ struct devfreq_cooling_device *dfc = cdev->devdata;
+ unsigned long freq;
+ u32 static_power;
+
+ if (state < 0 || state >= dfc->freq_table_size)
+ return -EINVAL;
+
+ freq = dfc->freq_table[state];
+ static_power = get_static_power(dfc, freq);
+
+ *power = dfc->power_table[state] + static_power;
+ return 0;
+}
+
+static int devfreq_cooling_power2state(struct thermal_cooling_device *cdev,
+ struct thermal_zone_device *tz,
+ u32 power, unsigned long *state)
+{
+ struct devfreq_cooling_device *dfc = cdev->devdata;
+ struct devfreq *df = dfc->devfreq;
+ struct devfreq_dev_status *status = &df->last_status;
+ unsigned long freq = status->current_frequency;
+ unsigned long busy_time;
+ s32 dyn_power;
+ u32 static_power;
+ int i;
+
+ static_power = get_static_power(dfc, freq);
+
+ dyn_power = power - static_power;
+ dyn_power = dyn_power > 0 ? dyn_power : 0;
+
+ /* Scale dynamic power for utilization */
+ busy_time = status->busy_time ?: 1;
+ dyn_power = (dyn_power * status->total_time) / busy_time;
+
+ /*
+ * Find the first cooling state that is within the power
+ * budget for dynamic power.
+ */
+ for (i = 0; i < dfc->freq_table_size - 1; i++)
+ if (dyn_power >= dfc->power_table[i])
+ break;
+
+ *state = i;
+ trace_thermal_power_devfreq_limit(cdev, freq, *state, power);
+ return 0;
+}
+
+static struct thermal_cooling_device_ops devfreq_cooling_ops = {
+ .get_max_state = devfreq_cooling_get_max_state,
+ .get_cur_state = devfreq_cooling_get_cur_state,
+ .set_cur_state = devfreq_cooling_set_cur_state,
+};
+
+/**
+ * devfreq_cooling_gen_tables() - Generate power and freq tables.
+ * @dfc: Pointer to devfreq cooling device.
+ *
+ * Generate power and frequency tables: the power table hold the
+ * device's maximum power usage at each cooling state (OPP). The
+ * static and dynamic power using the appropriate voltage and
+ * frequency for the state, is acquired from the struct
+ * devfreq_cooling_power, and summed to make the maximum power draw.
+ *
+ * The frequency table holds the frequencies in descending order.
+ * That way its indexed by cooling device state.
+ *
+ * The tables are malloced, and pointers put in dfc. They must be
+ * freed when unregistering the devfreq cooling device.
+ *
+ * Return: 0 on success, negative error code on failure.
+ */
+static int devfreq_cooling_gen_tables(struct devfreq_cooling_device *dfc)
+{
+ struct devfreq *df = dfc->devfreq;
+ struct device *dev = df->dev.parent;
+ int ret, num_opps;
+ unsigned long freq;
+ u32 *power_table = NULL;
+ u32 *freq_table;
+ int i;
+
+ num_opps = dev_pm_opp_get_opp_count(dev);
+
+ if (dfc->power_ops) {
+ power_table = kcalloc(num_opps, sizeof(*power_table),
+ GFP_KERNEL);
+ if (!power_table)
+ ret = -ENOMEM;
+ }
+
+ freq_table = kcalloc(num_opps, sizeof(*freq_table),
+ GFP_KERNEL);
+ if (!freq_table) {
+ ret = -ENOMEM;
+ goto free_power_table;
+ }
+
+ for (i = 0, freq = ULONG_MAX; i < num_opps; i++, freq--) {
+ unsigned long power_dyn, voltage;
+ struct dev_pm_opp *opp;
+
+ rcu_read_lock();
+
+ opp = dev_pm_opp_find_freq_floor(dev, &freq);
+ if (IS_ERR(opp)) {
+ rcu_read_unlock();
+ ret = PTR_ERR(opp);
+ goto free_tables;
+ }
+
+ voltage = dev_pm_opp_get_voltage(opp) / 1000; /* mV */
+
+ rcu_read_unlock();
+
+ if (dfc->power_ops) {
+ power_dyn = get_dynamic_power(dfc, freq, voltage);
+
+ dev_dbg(dev, "Dynamic power table: %lu MHz @ %lu mV: %lu = %lu mW\n",
+ freq / 1000000, voltage, power_dyn, power_dyn);
+
+ power_table[i] = power_dyn;
+ }
+
+ freq_table[i] = freq;
+ }
+
+ if (dfc->power_ops)
+ dfc->power_table = power_table;
+
+ dfc->freq_table = freq_table;
+ dfc->freq_table_size = num_opps;
+
+ return 0;
+
+free_tables:
+ kfree(freq_table);
+free_power_table:
+ kfree(power_table);
+
+ return ret;
+}
+
+/**
+ * of_devfreq_cooling_register_power() - Register devfreq cooling device,
+ * with OF and power information.
+ * @np: Pointer to OF device_node.
+ * @df: Pointer to devfreq device.
+ * @dfc_power: Pointer to devfreq_cooling_power.
+ *
+ * Register a devfreq cooling device. The available OPPs must be
+ * registered on the device.
+ *
+ * If @dfc_power is provided, the cooling device is registered with the
+ * power extensions. For the power extensions to work correctly,
+ * devfreq should use the simple_ondemand governor, other governors
+ * are not currently supported.
+ */
+struct devfreq_cooling_device *
+of_devfreq_cooling_register_power(struct device_node *np, struct devfreq *df,
+ struct devfreq_cooling_power *dfc_power)
+{
+ struct thermal_cooling_device *cdev;
+ struct devfreq_cooling_device *dfc;
+ char dev_name[THERMAL_NAME_LENGTH];
+ int err;
+
+ dfc = kzalloc(sizeof(*dfc), GFP_KERNEL);
+ if (!dfc)
+ return ERR_PTR(-ENOMEM);
+
+ dfc->devfreq = df;
+
+ if (dfc_power) {
+ dfc->power_ops = dfc_power;
+
+ devfreq_cooling_ops.get_requested_power =
+ devfreq_cooling_get_requested_power;
+ devfreq_cooling_ops.state2power = devfreq_cooling_state2power;
+ devfreq_cooling_ops.power2state = devfreq_cooling_power2state;
+ }
+
+ err = devfreq_cooling_gen_tables(dfc);
+ if (err)
+ goto free_dfc;
+
+ err = get_idr(&devfreq_idr, &dfc->id);
+ if (err)
+ goto free_tables;
+
+ snprintf(dev_name, sizeof(dev_name), "thermal-devfreq-%d", dfc->id);
+
+ cdev = thermal_of_cooling_device_register(np, dev_name, dfc,
+ &devfreq_cooling_ops);
+ if (IS_ERR(cdev)) {
+ err = PTR_ERR(cdev);
+ dev_err(df->dev.parent,
+ "Failed to register devfreq cooling device (%d)\n",
+ err);
+ goto release_idr;
+ }
+
+ dfc->cdev = cdev;
+
+ return dfc;
+
+release_idr:
+ release_idr(&devfreq_idr, dfc->id);
+free_tables:
+ kfree(dfc->power_table);
+ kfree(dfc->freq_table);
+free_dfc:
+ kfree(dfc);
+
+ return ERR_PTR(err);
+}
+EXPORT_SYMBOL_GPL(of_devfreq_cooling_register_power);
+
+/**
+ * of_devfreq_cooling_register() - Register devfreq cooling device,
+ * with OF information.
+ * @np: Pointer to OF device_node.
+ * @df: Pointer to devfreq device.
+ */
+struct devfreq_cooling_device *
+of_devfreq_cooling_register(struct device_node *np, struct devfreq *df)
+{
+ return of_devfreq_cooling_register_power(np, df, NULL);
+}
+EXPORT_SYMBOL_GPL(of_devfreq_cooling_register);
+
+/**
+ * devfreq_cooling_register() - Register devfreq cooling device.
+ * @df: Pointer to devfreq device.
+ */
+struct devfreq_cooling_device *devfreq_cooling_register(struct devfreq *df)
+{
+ return of_devfreq_cooling_register(NULL, df);
+}
+EXPORT_SYMBOL_GPL(devfreq_cooling_register);
+
+/**
+ * devfreq_cooling_unregister() - Unregister devfreq cooling device.
+ * @dfc: Pointer to devfreq cooling device to unregister.
+ */
+void devfreq_cooling_unregister(struct devfreq_cooling_device *dfc)
+{
+ if (!dfc)
+ return;
+
+ thermal_cooling_device_unregister(dfc->cdev);
+ release_idr(&devfreq_idr, dfc->id);
+ kfree(dfc->power_table);
+ kfree(dfc->freq_table);
+
+ kfree(dfc);
+}
+EXPORT_SYMBOL_GPL(devfreq_cooling_unregister);
diff --git a/drivers/thermal/imx_thermal.c b/drivers/thermal/imx_thermal.c
index 4bec1d3c3d27..c8fe3cac2e0e 100644
--- a/drivers/thermal/imx_thermal.c
+++ b/drivers/thermal/imx_thermal.c
@@ -288,7 +288,7 @@ static int imx_set_trip_temp(struct thermal_zone_device *tz, int trip,
if (trip == IMX_TRIP_CRITICAL)
return -EPERM;
- if (temp > IMX_TEMP_PASSIVE)
+ if (temp < 0 || temp > IMX_TEMP_PASSIVE)
return -EINVAL;
data->temp_passive = temp;
@@ -487,14 +487,6 @@ static int imx_thermal_probe(struct platform_device *pdev)
if (data->irq < 0)
return data->irq;
- ret = devm_request_threaded_irq(&pdev->dev, data->irq,
- imx_thermal_alarm_irq, imx_thermal_alarm_irq_thread,
- 0, "imx_thermal", data);
- if (ret < 0) {
- dev_err(&pdev->dev, "failed to request alarm irq: %d\n", ret);
- return ret;
- }
-
platform_set_drvdata(pdev, data);
ret = imx_get_sensor_data(pdev);
@@ -571,6 +563,17 @@ static int imx_thermal_probe(struct platform_device *pdev)
regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_POWER_DOWN);
regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_MEASURE_TEMP);
+ ret = devm_request_threaded_irq(&pdev->dev, data->irq,
+ imx_thermal_alarm_irq, imx_thermal_alarm_irq_thread,
+ 0, "imx_thermal", data);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "failed to request alarm irq: %d\n", ret);
+ clk_disable_unprepare(data->thermal_clk);
+ thermal_zone_device_unregister(data->tz);
+ cpufreq_cooling_unregister(data->cdev);
+ return ret;
+ }
+
data->irq_enabled = true;
data->mode = THERMAL_DEVICE_ENABLED;
diff --git a/drivers/thermal/rockchip_thermal.c b/drivers/thermal/rockchip_thermal.c
index c89ffb26a354..4d5b7d4b68a7 100644
--- a/drivers/thermal/rockchip_thermal.c
+++ b/drivers/thermal/rockchip_thermal.c
@@ -106,16 +106,14 @@ struct rockchip_thermal_data {
#define TSADCV2_AUTO_PERIOD_HT 0x6c
#define TSADCV2_AUTO_EN BIT(0)
-#define TSADCV2_AUTO_DISABLE ~BIT(0)
#define TSADCV2_AUTO_SRC_EN(chn) BIT(4 + (chn))
#define TSADCV2_AUTO_TSHUT_POLARITY_HIGH BIT(8)
-#define TSADCV2_AUTO_TSHUT_POLARITY_LOW ~BIT(8)
#define TSADCV2_INT_SRC_EN(chn) BIT(chn)
#define TSADCV2_SHUT_2GPIO_SRC_EN(chn) BIT(4 + (chn))
#define TSADCV2_SHUT_2CRU_SRC_EN(chn) BIT(8 + (chn))
-#define TSADCV2_INT_PD_CLEAR ~BIT(8)
+#define TSADCV2_INT_PD_CLEAR_MASK ~BIT(8)
#define TSADCV2_DATA_MASK 0xfff
#define TSADCV2_HIGHT_INT_DEBOUNCE_COUNT 4
@@ -124,7 +122,7 @@ struct rockchip_thermal_data {
#define TSADCV2_AUTO_PERIOD_HT_TIME 50 /* msec */
struct tsadc_table {
- unsigned long code;
+ u32 code;
long temp;
};
@@ -164,7 +162,6 @@ static const struct tsadc_table v2_code_table[] = {
{3452, 115000},
{3437, 120000},
{3421, 125000},
- {0, 125000},
};
static u32 rk_tsadcv2_temp_to_code(long temp)
@@ -191,19 +188,21 @@ static u32 rk_tsadcv2_temp_to_code(long temp)
return 0;
}
-static int rk_tsadcv2_code_to_temp(u32 code)
+static int rk_tsadcv2_code_to_temp(u32 code, int *temp)
{
- unsigned int low = 0;
+ unsigned int low = 1;
unsigned int high = ARRAY_SIZE(v2_code_table) - 1;
unsigned int mid = (low + high) / 2;
unsigned int num;
unsigned long denom;
- /* Invalid code, return -EAGAIN */
- if (code > TSADCV2_DATA_MASK)
- return -EAGAIN;
+ BUILD_BUG_ON(ARRAY_SIZE(v2_code_table) < 2);
- while (low <= high && mid) {
+ code &= TSADCV2_DATA_MASK;
+ if (code < v2_code_table[high].code)
+ return -EAGAIN; /* Incorrect reading */
+
+ while (low <= high) {
if (code >= v2_code_table[mid].code &&
code < v2_code_table[mid - 1].code)
break;
@@ -223,7 +222,9 @@ static int rk_tsadcv2_code_to_temp(u32 code)
num = v2_code_table[mid].temp - v2_code_table[mid - 1].temp;
num *= v2_code_table[mid - 1].code - code;
denom = v2_code_table[mid - 1].code - v2_code_table[mid].code;
- return v2_code_table[mid - 1].temp + (num / denom);
+ *temp = v2_code_table[mid - 1].temp + (num / denom);
+
+ return 0;
}
/**
@@ -241,10 +242,10 @@ static void rk_tsadcv2_initialize(void __iomem *regs,
enum tshut_polarity tshut_polarity)
{
if (tshut_polarity == TSHUT_HIGH_ACTIVE)
- writel_relaxed(0 | (TSADCV2_AUTO_TSHUT_POLARITY_HIGH),
+ writel_relaxed(0U | TSADCV2_AUTO_TSHUT_POLARITY_HIGH,
regs + TSADCV2_AUTO_CON);
else
- writel_relaxed(0 | (TSADCV2_AUTO_TSHUT_POLARITY_LOW),
+ writel_relaxed(0U & ~TSADCV2_AUTO_TSHUT_POLARITY_HIGH,
regs + TSADCV2_AUTO_CON);
writel_relaxed(TSADCV2_AUTO_PERIOD_TIME, regs + TSADCV2_AUTO_PERIOD);
@@ -261,7 +262,7 @@ static void rk_tsadcv2_irq_ack(void __iomem *regs)
u32 val;
val = readl_relaxed(regs + TSADCV2_INT_PD);
- writel_relaxed(val & TSADCV2_INT_PD_CLEAR, regs + TSADCV2_INT_PD);
+ writel_relaxed(val & TSADCV2_INT_PD_CLEAR_MASK, regs + TSADCV2_INT_PD);
}
static void rk_tsadcv2_control(void __iomem *regs, bool enable)
@@ -281,14 +282,9 @@ static int rk_tsadcv2_get_temp(int chn, void __iomem *regs, int *temp)
{
u32 val;
- /* the A/D value of the channel last conversion need some time */
val = readl_relaxed(regs + TSADCV2_DATA(chn));
- if (val == 0)
- return -EAGAIN;
-
- *temp = rk_tsadcv2_code_to_temp(val);
- return 0;
+ return rk_tsadcv2_code_to_temp(val, temp);
}
static void rk_tsadcv2_tshut_temp(int chn, void __iomem *regs, long temp)
diff --git a/drivers/thermal/ti-soc-thermal/Kconfig b/drivers/thermal/ti-soc-thermal/Kconfig
index cb6686ff09ae..ea8283f08aa6 100644
--- a/drivers/thermal/ti-soc-thermal/Kconfig
+++ b/drivers/thermal/ti-soc-thermal/Kconfig
@@ -19,6 +19,21 @@ config TI_THERMAL
This includes trip points definitions, extrapolation rules and
CPU cooling device bindings.
+config OMAP3_THERMAL
+ bool "Texas Instruments OMAP3 thermal support"
+ depends on TI_SOC_THERMAL
+ depends on ARCH_OMAP3 || COMPILE_TEST
+ help
+ If you say yes here you get thermal support for the Texas Instruments
+ OMAP3 SoC family. The current chips supported are:
+ - OMAP3430
+
+ OMAP3 chips normally don't need thermal management, and sensors in
+ this generation are not accurate, nor they are very close to
+ the important hotspots.
+
+ Say 'N' here.
+
config OMAP4_THERMAL
bool "Texas Instruments OMAP4 thermal support"
depends on TI_SOC_THERMAL
diff --git a/drivers/thermal/ti-soc-thermal/Makefile b/drivers/thermal/ti-soc-thermal/Makefile
index 1226b2484e55..0f89bdf03790 100644
--- a/drivers/thermal/ti-soc-thermal/Makefile
+++ b/drivers/thermal/ti-soc-thermal/Makefile
@@ -2,5 +2,6 @@ obj-$(CONFIG_TI_SOC_THERMAL) += ti-soc-thermal.o
ti-soc-thermal-y := ti-bandgap.o
ti-soc-thermal-$(CONFIG_TI_THERMAL) += ti-thermal-common.o
ti-soc-thermal-$(CONFIG_DRA752_THERMAL) += dra752-thermal-data.o
+ti-soc-thermal-$(CONFIG_OMAP3_THERMAL) += omap3-thermal-data.o
ti-soc-thermal-$(CONFIG_OMAP4_THERMAL) += omap4-thermal-data.o
ti-soc-thermal-$(CONFIG_OMAP5_THERMAL) += omap5-thermal-data.o
diff --git a/drivers/thermal/ti-soc-thermal/omap3-thermal-data.c b/drivers/thermal/ti-soc-thermal/omap3-thermal-data.c
new file mode 100644
index 000000000000..3ee34340edab
--- /dev/null
+++ b/drivers/thermal/ti-soc-thermal/omap3-thermal-data.c
@@ -0,0 +1,176 @@
+/*
+ * OMAP3 thermal driver.
+ *
+ * Copyright (C) 2011-2012 Texas Instruments Inc.
+ * Copyright (C) 2014 Pavel Machek <pavel@ucw.cz>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.
+ *
+ * Note
+ * http://www.ti.com/lit/er/sprz278f/sprz278f.pdf "Advisory
+ * 3.1.1.186 MMC OCP Clock Not Gated When Thermal Sensor Is Used"
+ *
+ * Also TI says:
+ * Just be careful when you try to make thermal policy like decisions
+ * based on this sensor. Placement of the sensor w.r.t the actual logic
+ * generating heat has to be a factor as well. If you are just looking
+ * for an approximation temperature (thermometerish kind), you might be
+ * ok with this. I am not sure we'd find any TI data around this.. just a
+ * heads up.
+ */
+
+#include "ti-thermal.h"
+#include "ti-bandgap.h"
+
+/*
+ * OMAP34XX has one instance of thermal sensor for MPU
+ * need to describe the individual bit fields
+ */
+static struct temp_sensor_registers
+omap34xx_mpu_temp_sensor_registers = {
+ .temp_sensor_ctrl = 0,
+ .bgap_soc_mask = BIT(8),
+ .bgap_eocz_mask = BIT(7),
+ .bgap_dtemp_mask = 0x7f,
+
+ .bgap_mode_ctrl = 0,
+ .mode_ctrl_mask = BIT(9),
+};
+
+/* Thresholds and limits for OMAP34XX MPU temperature sensor */
+static struct temp_sensor_data omap34xx_mpu_temp_sensor_data = {
+ .min_freq = 32768,
+ .max_freq = 32768,
+ .max_temp = 125000,
+ .min_temp = -40000,
+ .hyst_val = 5000,
+};
+
+/*
+ * Temperature values in milli degree celsius
+ */
+static const int
+omap34xx_adc_to_temp[128] = {
+ -40000, -40000, -40000, -40000, -40000, -39000, -38000, -36000,
+ -34000, -32000, -31000, -29000, -28000, -26000, -25000, -24000,
+ -22000, -21000, -19000, -18000, -17000, -15000, -14000, -12000,
+ -11000, -9000, -8000, -7000, -5000, -4000, -2000, -1000, 0000,
+ 1000, 3000, 4000, 5000, 7000, 8000, 10000, 11000, 13000, 14000,
+ 15000, 17000, 18000, 20000, 21000, 22000, 24000, 25000, 27000,
+ 28000, 30000, 31000, 32000, 34000, 35000, 37000, 38000, 39000,
+ 41000, 42000, 44000, 45000, 47000, 48000, 49000, 51000, 52000,
+ 53000, 55000, 56000, 58000, 59000, 60000, 62000, 63000, 65000,
+ 66000, 67000, 69000, 70000, 72000, 73000, 74000, 76000, 77000,
+ 79000, 80000, 81000, 83000, 84000, 85000, 87000, 88000, 89000,
+ 91000, 92000, 94000, 95000, 96000, 98000, 99000, 100000,
+ 102000, 103000, 105000, 106000, 107000, 109000, 110000, 111000,
+ 113000, 114000, 116000, 117000, 118000, 120000, 121000, 122000,
+ 124000, 124000, 125000, 125000, 125000, 125000, 125000
+};
+
+/* OMAP34XX data */
+const struct ti_bandgap_data omap34xx_data = {
+ .features = TI_BANDGAP_FEATURE_CLK_CTRL | TI_BANDGAP_FEATURE_UNRELIABLE,
+ .fclock_name = "ts_fck",
+ .div_ck_name = "ts_fck",
+ .conv_table = omap34xx_adc_to_temp,
+ .adc_start_val = 0,
+ .adc_end_val = 127,
+ .expose_sensor = ti_thermal_expose_sensor,
+ .remove_sensor = ti_thermal_remove_sensor,
+
+ .sensors = {
+ {
+ .registers = &omap34xx_mpu_temp_sensor_registers,
+ .ts_data = &omap34xx_mpu_temp_sensor_data,
+ .domain = "cpu",
+ .slope = 0,
+ .constant = 20000,
+ .slope_pcb = 0,
+ .constant_pcb = 20000,
+ .register_cooling = NULL,
+ .unregister_cooling = NULL,
+ },
+ },
+ .sensor_count = 1,
+};
+
+/*
+ * OMAP36XX has one instance of thermal sensor for MPU
+ * need to describe the individual bit fields
+ */
+static struct temp_sensor_registers
+omap36xx_mpu_temp_sensor_registers = {
+ .temp_sensor_ctrl = 0,
+ .bgap_soc_mask = BIT(9),
+ .bgap_eocz_mask = BIT(8),
+ .bgap_dtemp_mask = 0xFF,
+
+ .bgap_mode_ctrl = 0,
+ .mode_ctrl_mask = BIT(10),
+};
+
+/* Thresholds and limits for OMAP36XX MPU temperature sensor */
+static struct temp_sensor_data omap36xx_mpu_temp_sensor_data = {
+ .min_freq = 32768,
+ .max_freq = 32768,
+ .max_temp = 125000,
+ .min_temp = -40000,
+ .hyst_val = 5000,
+};
+
+/*
+ * Temperature values in milli degree celsius
+ */
+static const int
+omap36xx_adc_to_temp[128] = {
+ -40000, -40000, -40000, -40000, -40000, -40000, -40000, -40000,
+ -40000, -40000, -40000, -40000, -40000, -38000, -35000, -34000,
+ -32000, -30000, -28000, -26000, -24000, -22000, -20000, -18500,
+ -17000, -15000, -13500, -12000, -10000, -8000, -6500, -5000, -3500,
+ -1500, 0, 2000, 3500, 5000, 6500, 8500, 10000, 12000, 13500,
+ 15000, 17000, 19000, 21000, 23000, 25000, 27000, 28500, 30000,
+ 32000, 33500, 35000, 37000, 38500, 40000, 42000, 43500, 45000,
+ 47000, 48500, 50000, 52000, 53500, 55000, 57000, 58500, 60000,
+ 62000, 64000, 66000, 68000, 70000, 71500, 73500, 75000, 77000,
+ 78500, 80000, 82000, 83500, 85000, 87000, 88500, 90000, 92000,
+ 93500, 95000, 97000, 98500, 100000, 102000, 103500, 105000, 107000,
+ 109000, 111000, 113000, 115000, 117000, 118500, 120000, 122000,
+ 123500, 125000, 125000, 125000, 125000, 125000, 125000, 125000,
+ 125000, 125000, 125000, 125000, 125000, 125000, 125000, 125000,
+ 125000, 125000, 125000, 125000, 125000, 125000, 125000
+};
+
+/* OMAP36XX data */
+const struct ti_bandgap_data omap36xx_data = {
+ .features = TI_BANDGAP_FEATURE_CLK_CTRL | TI_BANDGAP_FEATURE_UNRELIABLE,
+ .fclock_name = "ts_fck",
+ .div_ck_name = "ts_fck",
+ .conv_table = omap36xx_adc_to_temp,
+ .adc_start_val = 0,
+ .adc_end_val = 127,
+ .expose_sensor = ti_thermal_expose_sensor,
+ .remove_sensor = ti_thermal_remove_sensor,
+
+ .sensors = {
+ {
+ .registers = &omap36xx_mpu_temp_sensor_registers,
+ .ts_data = &omap36xx_mpu_temp_sensor_data,
+ .domain = "cpu",
+ .slope = 0,
+ .constant = 20000,
+ .slope_pcb = 0,
+ .constant_pcb = 20000,
+ .register_cooling = NULL,
+ .unregister_cooling = NULL,
+ },
+ },
+ .sensor_count = 1,
+};
diff --git a/drivers/thermal/ti-soc-thermal/ti-bandgap.c b/drivers/thermal/ti-soc-thermal/ti-bandgap.c
index 10c47c048f7a..1e34a1efc554 100644
--- a/drivers/thermal/ti-soc-thermal/ti-bandgap.c
+++ b/drivers/thermal/ti-soc-thermal/ti-bandgap.c
@@ -1274,6 +1274,10 @@ int ti_bandgap_probe(struct platform_device *pdev)
}
bgp->dev = &pdev->dev;
+ if (TI_BANDGAP_HAS(bgp, UNRELIABLE))
+ dev_warn(&pdev->dev,
+ "This OMAP thermal sensor is unreliable. You've been warned\n");
+
if (TI_BANDGAP_HAS(bgp, TSHUT)) {
ret = ti_bandgap_tshut_init(bgp, pdev);
if (ret) {
@@ -1579,6 +1583,16 @@ static SIMPLE_DEV_PM_OPS(ti_bandgap_dev_pm_ops, ti_bandgap_suspend,
#endif
static const struct of_device_id of_ti_bandgap_match[] = {
+#ifdef CONFIG_OMAP3_THERMAL
+ {
+ .compatible = "ti,omap34xx-bandgap",
+ .data = (void *)&omap34xx_data,
+ },
+ {
+ .compatible = "ti,omap36xx-bandgap",
+ .data = (void *)&omap36xx_data,
+ },
+#endif
#ifdef CONFIG_OMAP4_THERMAL
{
.compatible = "ti,omap4430-bandgap",
diff --git a/drivers/thermal/ti-soc-thermal/ti-bandgap.h b/drivers/thermal/ti-soc-thermal/ti-bandgap.h
index 0c52f7afba00..fe0adb898764 100644
--- a/drivers/thermal/ti-soc-thermal/ti-bandgap.h
+++ b/drivers/thermal/ti-soc-thermal/ti-bandgap.h
@@ -322,6 +322,8 @@ struct ti_temp_sensor {
* has Errata 814
* TI_BANDGAP_FEATURE_ERRATA_813 - used to workaorund when the bandgap device
* has Errata 813
+ * TI_BANDGAP_FEATURE_UNRELIABLE - used when the sensor readings are too
+ * inaccurate.
* TI_BANDGAP_HAS(b, f) - macro to check if a bandgap device is capable of a
* specific feature (above) or not. Return non-zero, if yes.
*/
@@ -337,6 +339,7 @@ struct ti_temp_sensor {
#define TI_BANDGAP_FEATURE_HISTORY_BUFFER BIT(9)
#define TI_BANDGAP_FEATURE_ERRATA_814 BIT(10)
#define TI_BANDGAP_FEATURE_ERRATA_813 BIT(11)
+#define TI_BANDGAP_FEATURE_UNRELIABLE BIT(12)
#define TI_BANDGAP_HAS(b, f) \
((b)->conf->features & TI_BANDGAP_FEATURE_ ## f)
@@ -390,6 +393,14 @@ int ti_bandgap_set_sensor_data(struct ti_bandgap *bgp, int id, void *data);
void *ti_bandgap_get_sensor_data(struct ti_bandgap *bgp, int id);
int ti_bandgap_get_trend(struct ti_bandgap *bgp, int id, int *trend);
+#ifdef CONFIG_OMAP3_THERMAL
+extern const struct ti_bandgap_data omap34xx_data;
+extern const struct ti_bandgap_data omap36xx_data;
+#else
+#define omap34xx_data NULL
+#define omap36xx_data NULL
+#endif
+
#ifdef CONFIG_OMAP4_THERMAL
extern const struct ti_bandgap_data omap4430_data;
extern const struct ti_bandgap_data omap4460_data;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-21 17:29:34 +0000