source "drivers/thermal/tegra/Kconfig"
-config QCOM_SPMI_TEMP_ALARM
- tristate "Qualcomm SPMI PMIC Temperature Alarm"
- depends on OF && SPMI && IIO
- select REGMAP_SPMI
- help
- This enables a thermal sysfs driver for Qualcomm plug-and-play (QPNP)
- PMIC devices. It shows up in sysfs as a thermal sensor with multiple
- trip points. The temperature reported by the thermal sensor reflects the
- real time die temperature if an ADC is present or an estimate of the
- temperature based upon the over temperature stage value.
-
config GENERIC_ADC_THERMAL
tristate "Generic ADC based thermal sensor"
depends on IIO
# platform thermal drivers
obj-y += broadcom/
-obj-$(CONFIG_QCOM_SPMI_TEMP_ALARM) += qcom-spmi-temp-alarm.o
obj-$(CONFIG_SPEAR_THERMAL) += spear_thermal.o
obj-$(CONFIG_ROCKCHIP_THERMAL) += rockchip_thermal.o
obj-$(CONFIG_RCAR_THERMAL) += rcar_thermal.o
+++ /dev/null
-/*
- * Copyright (c) 2011-2015, 2017, The Linux Foundation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 and
- * only version 2 as published by the Free Software Foundation.
- *
- * 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.
- */
-
-#include <linux/bitops.h>
-#include <linux/delay.h>
-#include <linux/err.h>
-#include <linux/iio/consumer.h>
-#include <linux/interrupt.h>
-#include <linux/module.h>
-#include <linux/of.h>
-#include <linux/of_device.h>
-#include <linux/platform_device.h>
-#include <linux/regmap.h>
-#include <linux/thermal.h>
-
-#include "thermal_core.h"
-
-#define QPNP_TM_REG_TYPE 0x04
-#define QPNP_TM_REG_SUBTYPE 0x05
-#define QPNP_TM_REG_STATUS 0x08
-#define QPNP_TM_REG_SHUTDOWN_CTRL1 0x40
-#define QPNP_TM_REG_ALARM_CTRL 0x46
-
-#define QPNP_TM_TYPE 0x09
-#define QPNP_TM_SUBTYPE_GEN1 0x08
-#define QPNP_TM_SUBTYPE_GEN2 0x09
-
-#define STATUS_GEN1_STAGE_MASK GENMASK(1, 0)
-#define STATUS_GEN2_STATE_MASK GENMASK(6, 4)
-#define STATUS_GEN2_STATE_SHIFT 4
-
-#define SHUTDOWN_CTRL1_OVERRIDE_S2 BIT(6)
-#define SHUTDOWN_CTRL1_THRESHOLD_MASK GENMASK(1, 0)
-
-#define SHUTDOWN_CTRL1_RATE_25HZ BIT(3)
-
-#define ALARM_CTRL_FORCE_ENABLE BIT(7)
-
-/*
- * Trip point values based on threshold control
- * 0 = {105 C, 125 C, 145 C}
- * 1 = {110 C, 130 C, 150 C}
- * 2 = {115 C, 135 C, 155 C}
- * 3 = {120 C, 140 C, 160 C}
-*/
-#define TEMP_STAGE_STEP 20000 /* Stage step: 20.000 C */
-#define TEMP_STAGE_HYSTERESIS 2000
-
-#define TEMP_THRESH_MIN 105000 /* Threshold Min: 105 C */
-#define TEMP_THRESH_STEP 5000 /* Threshold step: 5 C */
-
-#define THRESH_MIN 0
-#define THRESH_MAX 3
-
-/* Stage 2 Threshold Min: 125 C */
-#define STAGE2_THRESHOLD_MIN 125000
-/* Stage 2 Threshold Max: 140 C */
-#define STAGE2_THRESHOLD_MAX 140000
-
-/* Temperature in Milli Celsius reported during stage 0 if no ADC is present */
-#define DEFAULT_TEMP 37000
-
-struct qpnp_tm_chip {
- struct regmap *map;
- struct device *dev;
- struct thermal_zone_device *tz_dev;
- unsigned int subtype;
- long temp;
- unsigned int thresh;
- unsigned int stage;
- unsigned int prev_stage;
- unsigned int base;
- /* protects .thresh, .stage and chip registers */
- struct mutex lock;
- bool initialized;
-
- struct iio_channel *adc;
-};
-
-/* This array maps from GEN2 alarm state to GEN1 alarm stage */
-static const unsigned int alarm_state_map[8] = {0, 1, 1, 2, 2, 3, 3, 3};
-
-static int qpnp_tm_read(struct qpnp_tm_chip *chip, u16 addr, u8 *data)
-{
- unsigned int val;
- int ret;
-
- ret = regmap_read(chip->map, chip->base + addr, &val);
- if (ret < 0)
- return ret;
-
- *data = val;
- return 0;
-}
-
-static int qpnp_tm_write(struct qpnp_tm_chip *chip, u16 addr, u8 data)
-{
- return regmap_write(chip->map, chip->base + addr, data);
-}
-
-/**
- * qpnp_tm_get_temp_stage() - return over-temperature stage
- * @chip: Pointer to the qpnp_tm chip
- *
- * Return: stage (GEN1) or state (GEN2) on success, or errno on failure.
- */
-static int qpnp_tm_get_temp_stage(struct qpnp_tm_chip *chip)
-{
- int ret;
- u8 reg = 0;
-
- ret = qpnp_tm_read(chip, QPNP_TM_REG_STATUS, ®);
- if (ret < 0)
- return ret;
-
- if (chip->subtype == QPNP_TM_SUBTYPE_GEN1)
- ret = reg & STATUS_GEN1_STAGE_MASK;
- else
- ret = (reg & STATUS_GEN2_STATE_MASK) >> STATUS_GEN2_STATE_SHIFT;
-
- return ret;
-}
-
-/*
- * This function updates the internal temp value based on the
- * current thermal stage and threshold as well as the previous stage
- */
-static int qpnp_tm_update_temp_no_adc(struct qpnp_tm_chip *chip)
-{
- unsigned int stage, stage_new, stage_old;
- int ret;
-
- WARN_ON(!mutex_is_locked(&chip->lock));
-
- ret = qpnp_tm_get_temp_stage(chip);
- if (ret < 0)
- return ret;
- stage = ret;
-
- if (chip->subtype == QPNP_TM_SUBTYPE_GEN1) {
- stage_new = stage;
- stage_old = chip->stage;
- } else {
- stage_new = alarm_state_map[stage];
- stage_old = alarm_state_map[chip->stage];
- }
-
- if (stage_new > stage_old) {
- /* increasing stage, use lower bound */
- chip->temp = (stage_new - 1) * TEMP_STAGE_STEP +
- chip->thresh * TEMP_THRESH_STEP +
- TEMP_STAGE_HYSTERESIS + TEMP_THRESH_MIN;
- } else if (stage_new < stage_old) {
- /* decreasing stage, use upper bound */
- chip->temp = stage_new * TEMP_STAGE_STEP +
- chip->thresh * TEMP_THRESH_STEP -
- TEMP_STAGE_HYSTERESIS + TEMP_THRESH_MIN;
- }
-
- chip->stage = stage;
-
- return 0;
-}
-
-static int qpnp_tm_get_temp(void *data, int *temp)
-{
- struct qpnp_tm_chip *chip = data;
- int ret, mili_celsius;
-
- if (!temp)
- return -EINVAL;
-
- if (!chip->initialized) {
- *temp = DEFAULT_TEMP;
- return 0;
- }
-
- if (!chip->adc) {
- mutex_lock(&chip->lock);
- ret = qpnp_tm_update_temp_no_adc(chip);
- mutex_unlock(&chip->lock);
- if (ret < 0)
- return ret;
- } else {
- ret = iio_read_channel_processed(chip->adc, &mili_celsius);
- if (ret < 0)
- return ret;
-
- chip->temp = mili_celsius;
- }
-
- *temp = chip->temp < 0 ? 0 : chip->temp;
-
- return 0;
-}
-
-static int qpnp_tm_update_critical_trip_temp(struct qpnp_tm_chip *chip,
- int temp)
-{
- u8 reg;
- bool disable_s2_shutdown = false;
-
- WARN_ON(!mutex_is_locked(&chip->lock));
-
- /*
- * Default: S2 and S3 shutdown enabled, thresholds at
- * 105C/125C/145C, monitoring at 25Hz
- */
- reg = SHUTDOWN_CTRL1_RATE_25HZ;
-
- if (temp == THERMAL_TEMP_INVALID ||
- temp < STAGE2_THRESHOLD_MIN) {
- chip->thresh = THRESH_MIN;
- goto skip;
- }
-
- if (temp <= STAGE2_THRESHOLD_MAX) {
- chip->thresh = THRESH_MAX -
- ((STAGE2_THRESHOLD_MAX - temp) /
- TEMP_THRESH_STEP);
- disable_s2_shutdown = true;
- } else {
- chip->thresh = THRESH_MAX;
-
- if (chip->adc)
- disable_s2_shutdown = true;
- else
- dev_warn(chip->dev,
- "No ADC is configured and critical temperature is above the maximum stage 2 threshold of 140 C! Configuring stage 2 shutdown at 140 C.\n");
- }
-
-skip:
- reg |= chip->thresh;
- if (disable_s2_shutdown)
- reg |= SHUTDOWN_CTRL1_OVERRIDE_S2;
-
- return qpnp_tm_write(chip, QPNP_TM_REG_SHUTDOWN_CTRL1, reg);
-}
-
-static int qpnp_tm_set_trip_temp(void *data, int trip, int temp)
-{
- struct qpnp_tm_chip *chip = data;
- const struct thermal_trip *trip_points;
- int ret;
-
- trip_points = of_thermal_get_trip_points(chip->tz_dev);
- if (!trip_points)
- return -EINVAL;
-
- if (trip_points[trip].type != THERMAL_TRIP_CRITICAL)
- return 0;
-
- mutex_lock(&chip->lock);
- ret = qpnp_tm_update_critical_trip_temp(chip, temp);
- mutex_unlock(&chip->lock);
-
- return ret;
-}
-
-static const struct thermal_zone_of_device_ops qpnp_tm_sensor_ops = {
- .get_temp = qpnp_tm_get_temp,
- .set_trip_temp = qpnp_tm_set_trip_temp,
-};
-
-static irqreturn_t qpnp_tm_isr(int irq, void *data)
-{
- struct qpnp_tm_chip *chip = data;
-
- thermal_zone_device_update(chip->tz_dev, THERMAL_EVENT_UNSPECIFIED);
-
- return IRQ_HANDLED;
-}
-
-static int qpnp_tm_get_critical_trip_temp(struct qpnp_tm_chip *chip)
-{
- int ntrips;
- const struct thermal_trip *trips;
- int i;
-
- ntrips = of_thermal_get_ntrips(chip->tz_dev);
- if (ntrips <= 0)
- return THERMAL_TEMP_INVALID;
-
- trips = of_thermal_get_trip_points(chip->tz_dev);
- if (!trips)
- return THERMAL_TEMP_INVALID;
-
- for (i = 0; i < ntrips; i++) {
- if (of_thermal_is_trip_valid(chip->tz_dev, i) &&
- trips[i].type == THERMAL_TRIP_CRITICAL)
- return trips[i].temperature;
- }
-
- return THERMAL_TEMP_INVALID;
-}
-
-/*
- * This function initializes the internal temp value based on only the
- * current thermal stage and threshold. Setup threshold control and
- * disable shutdown override.
- */
-static int qpnp_tm_init(struct qpnp_tm_chip *chip)
-{
- unsigned int stage;
- int ret;
- u8 reg = 0;
- int crit_temp;
-
- mutex_lock(&chip->lock);
-
- ret = qpnp_tm_read(chip, QPNP_TM_REG_SHUTDOWN_CTRL1, ®);
- if (ret < 0)
- goto out;
-
- chip->thresh = reg & SHUTDOWN_CTRL1_THRESHOLD_MASK;
- chip->temp = DEFAULT_TEMP;
-
- ret = qpnp_tm_get_temp_stage(chip);
- if (ret < 0)
- goto out;
- chip->stage = ret;
-
- stage = chip->subtype == QPNP_TM_SUBTYPE_GEN1
- ? chip->stage : alarm_state_map[chip->stage];
-
- if (stage)
- chip->temp = chip->thresh * TEMP_THRESH_STEP +
- (stage - 1) * TEMP_STAGE_STEP +
- TEMP_THRESH_MIN;
-
- crit_temp = qpnp_tm_get_critical_trip_temp(chip);
- ret = qpnp_tm_update_critical_trip_temp(chip, crit_temp);
- if (ret < 0)
- goto out;
-
- /* Enable the thermal alarm PMIC module in always-on mode. */
- reg = ALARM_CTRL_FORCE_ENABLE;
- ret = qpnp_tm_write(chip, QPNP_TM_REG_ALARM_CTRL, reg);
-
- chip->initialized = true;
-
-out:
- mutex_unlock(&chip->lock);
- return ret;
-}
-
-static int qpnp_tm_probe(struct platform_device *pdev)
-{
- struct qpnp_tm_chip *chip;
- struct device_node *node;
- u8 type, subtype;
- u32 res;
- int ret, irq;
-
- node = pdev->dev.of_node;
-
- chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);
- if (!chip)
- return -ENOMEM;
-
- dev_set_drvdata(&pdev->dev, chip);
- chip->dev = &pdev->dev;
-
- mutex_init(&chip->lock);
-
- chip->map = dev_get_regmap(pdev->dev.parent, NULL);
- if (!chip->map)
- return -ENXIO;
-
- ret = of_property_read_u32(node, "reg", &res);
- if (ret < 0)
- return ret;
-
- irq = platform_get_irq(pdev, 0);
- if (irq < 0)
- return irq;
-
- /* ADC based measurements are optional */
- chip->adc = devm_iio_channel_get(&pdev->dev, "thermal");
- if (IS_ERR(chip->adc)) {
- ret = PTR_ERR(chip->adc);
- chip->adc = NULL;
- if (ret == -EPROBE_DEFER)
- return ret;
- }
-
- chip->base = res;
-
- ret = qpnp_tm_read(chip, QPNP_TM_REG_TYPE, &type);
- if (ret < 0) {
- dev_err(&pdev->dev, "could not read type\n");
- return ret;
- }
-
- ret = qpnp_tm_read(chip, QPNP_TM_REG_SUBTYPE, &subtype);
- if (ret < 0) {
- dev_err(&pdev->dev, "could not read subtype\n");
- return ret;
- }
-
- if (type != QPNP_TM_TYPE || (subtype != QPNP_TM_SUBTYPE_GEN1
- && subtype != QPNP_TM_SUBTYPE_GEN2)) {
- dev_err(&pdev->dev, "invalid type 0x%02x or subtype 0x%02x\n",
- type, subtype);
- return -ENODEV;
- }
-
- chip->subtype = subtype;
-
- /*
- * Register the sensor before initializing the hardware to be able to
- * read the trip points. get_temp() returns the default temperature
- * before the hardware initialization is completed.
- */
- chip->tz_dev = devm_thermal_zone_of_sensor_register(
- &pdev->dev, 0, chip, &qpnp_tm_sensor_ops);
- if (IS_ERR(chip->tz_dev)) {
- dev_err(&pdev->dev, "failed to register sensor\n");
- return PTR_ERR(chip->tz_dev);
- }
-
- ret = qpnp_tm_init(chip);
- if (ret < 0) {
- dev_err(&pdev->dev, "init failed\n");
- return ret;
- }
-
- ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, qpnp_tm_isr,
- IRQF_ONESHOT, node->name, chip);
- if (ret < 0)
- return ret;
-
- thermal_zone_device_update(chip->tz_dev, THERMAL_EVENT_UNSPECIFIED);
-
- return 0;
-}
-
-static const struct of_device_id qpnp_tm_match_table[] = {
- { .compatible = "qcom,spmi-temp-alarm" },
- { }
-};
-MODULE_DEVICE_TABLE(of, qpnp_tm_match_table);
-
-static struct platform_driver qpnp_tm_driver = {
- .driver = {
- .name = "spmi-temp-alarm",
- .of_match_table = qpnp_tm_match_table,
- },
- .probe = qpnp_tm_probe,
-};
-module_platform_driver(qpnp_tm_driver);
-
-MODULE_ALIAS("platform:spmi-temp-alarm");
-MODULE_DESCRIPTION("QPNP PMIC Temperature Alarm driver");
-MODULE_LICENSE("GPL v2");
thermal zone device via the mode file results in disabling the sensor.
Also able to set threshold temperature for both hot and cold and update
when a threshold is reached.
+
+config QCOM_SPMI_TEMP_ALARM
+ tristate "Qualcomm SPMI PMIC Temperature Alarm"
+ depends on OF && SPMI && IIO
+ select REGMAP_SPMI
+ help
+ This enables a thermal sysfs driver for Qualcomm plug-and-play (QPNP)
+ PMIC devices. It shows up in sysfs as a thermal sensor with multiple
+ trip points. The temperature reported by the thermal sensor reflects the
+ real time die temperature if an ADC is present or an estimate of the
+ temperature based upon the over temperature stage value.
obj-$(CONFIG_QCOM_TSENS) += qcom_tsens.o
qcom_tsens-y += tsens.o tsens-common.o tsens-8916.o tsens-8974.o tsens-8960.o tsens-v2.o
+obj-$(CONFIG_QCOM_SPMI_TEMP_ALARM) += qcom-spmi-temp-alarm.o
--- /dev/null
+/*
+ * Copyright (c) 2011-2015, 2017, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * 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.
+ */
+
+#include <linux/bitops.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/iio/consumer.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/thermal.h>
+
+#include "../thermal_core.h"
+
+#define QPNP_TM_REG_TYPE 0x04
+#define QPNP_TM_REG_SUBTYPE 0x05
+#define QPNP_TM_REG_STATUS 0x08
+#define QPNP_TM_REG_SHUTDOWN_CTRL1 0x40
+#define QPNP_TM_REG_ALARM_CTRL 0x46
+
+#define QPNP_TM_TYPE 0x09
+#define QPNP_TM_SUBTYPE_GEN1 0x08
+#define QPNP_TM_SUBTYPE_GEN2 0x09
+
+#define STATUS_GEN1_STAGE_MASK GENMASK(1, 0)
+#define STATUS_GEN2_STATE_MASK GENMASK(6, 4)
+#define STATUS_GEN2_STATE_SHIFT 4
+
+#define SHUTDOWN_CTRL1_OVERRIDE_S2 BIT(6)
+#define SHUTDOWN_CTRL1_THRESHOLD_MASK GENMASK(1, 0)
+
+#define SHUTDOWN_CTRL1_RATE_25HZ BIT(3)
+
+#define ALARM_CTRL_FORCE_ENABLE BIT(7)
+
+/*
+ * Trip point values based on threshold control
+ * 0 = {105 C, 125 C, 145 C}
+ * 1 = {110 C, 130 C, 150 C}
+ * 2 = {115 C, 135 C, 155 C}
+ * 3 = {120 C, 140 C, 160 C}
+*/
+#define TEMP_STAGE_STEP 20000 /* Stage step: 20.000 C */
+#define TEMP_STAGE_HYSTERESIS 2000
+
+#define TEMP_THRESH_MIN 105000 /* Threshold Min: 105 C */
+#define TEMP_THRESH_STEP 5000 /* Threshold step: 5 C */
+
+#define THRESH_MIN 0
+#define THRESH_MAX 3
+
+/* Stage 2 Threshold Min: 125 C */
+#define STAGE2_THRESHOLD_MIN 125000
+/* Stage 2 Threshold Max: 140 C */
+#define STAGE2_THRESHOLD_MAX 140000
+
+/* Temperature in Milli Celsius reported during stage 0 if no ADC is present */
+#define DEFAULT_TEMP 37000
+
+struct qpnp_tm_chip {
+ struct regmap *map;
+ struct device *dev;
+ struct thermal_zone_device *tz_dev;
+ unsigned int subtype;
+ long temp;
+ unsigned int thresh;
+ unsigned int stage;
+ unsigned int prev_stage;
+ unsigned int base;
+ /* protects .thresh, .stage and chip registers */
+ struct mutex lock;
+ bool initialized;
+
+ struct iio_channel *adc;
+};
+
+/* This array maps from GEN2 alarm state to GEN1 alarm stage */
+static const unsigned int alarm_state_map[8] = {0, 1, 1, 2, 2, 3, 3, 3};
+
+static int qpnp_tm_read(struct qpnp_tm_chip *chip, u16 addr, u8 *data)
+{
+ unsigned int val;
+ int ret;
+
+ ret = regmap_read(chip->map, chip->base + addr, &val);
+ if (ret < 0)
+ return ret;
+
+ *data = val;
+ return 0;
+}
+
+static int qpnp_tm_write(struct qpnp_tm_chip *chip, u16 addr, u8 data)
+{
+ return regmap_write(chip->map, chip->base + addr, data);
+}
+
+/**
+ * qpnp_tm_get_temp_stage() - return over-temperature stage
+ * @chip: Pointer to the qpnp_tm chip
+ *
+ * Return: stage (GEN1) or state (GEN2) on success, or errno on failure.
+ */
+static int qpnp_tm_get_temp_stage(struct qpnp_tm_chip *chip)
+{
+ int ret;
+ u8 reg = 0;
+
+ ret = qpnp_tm_read(chip, QPNP_TM_REG_STATUS, ®);
+ if (ret < 0)
+ return ret;
+
+ if (chip->subtype == QPNP_TM_SUBTYPE_GEN1)
+ ret = reg & STATUS_GEN1_STAGE_MASK;
+ else
+ ret = (reg & STATUS_GEN2_STATE_MASK) >> STATUS_GEN2_STATE_SHIFT;
+
+ return ret;
+}
+
+/*
+ * This function updates the internal temp value based on the
+ * current thermal stage and threshold as well as the previous stage
+ */
+static int qpnp_tm_update_temp_no_adc(struct qpnp_tm_chip *chip)
+{
+ unsigned int stage, stage_new, stage_old;
+ int ret;
+
+ WARN_ON(!mutex_is_locked(&chip->lock));
+
+ ret = qpnp_tm_get_temp_stage(chip);
+ if (ret < 0)
+ return ret;
+ stage = ret;
+
+ if (chip->subtype == QPNP_TM_SUBTYPE_GEN1) {
+ stage_new = stage;
+ stage_old = chip->stage;
+ } else {
+ stage_new = alarm_state_map[stage];
+ stage_old = alarm_state_map[chip->stage];
+ }
+
+ if (stage_new > stage_old) {
+ /* increasing stage, use lower bound */
+ chip->temp = (stage_new - 1) * TEMP_STAGE_STEP +
+ chip->thresh * TEMP_THRESH_STEP +
+ TEMP_STAGE_HYSTERESIS + TEMP_THRESH_MIN;
+ } else if (stage_new < stage_old) {
+ /* decreasing stage, use upper bound */
+ chip->temp = stage_new * TEMP_STAGE_STEP +
+ chip->thresh * TEMP_THRESH_STEP -
+ TEMP_STAGE_HYSTERESIS + TEMP_THRESH_MIN;
+ }
+
+ chip->stage = stage;
+
+ return 0;
+}
+
+static int qpnp_tm_get_temp(void *data, int *temp)
+{
+ struct qpnp_tm_chip *chip = data;
+ int ret, mili_celsius;
+
+ if (!temp)
+ return -EINVAL;
+
+ if (!chip->initialized) {
+ *temp = DEFAULT_TEMP;
+ return 0;
+ }
+
+ if (!chip->adc) {
+ mutex_lock(&chip->lock);
+ ret = qpnp_tm_update_temp_no_adc(chip);
+ mutex_unlock(&chip->lock);
+ if (ret < 0)
+ return ret;
+ } else {
+ ret = iio_read_channel_processed(chip->adc, &mili_celsius);
+ if (ret < 0)
+ return ret;
+
+ chip->temp = mili_celsius;
+ }
+
+ *temp = chip->temp < 0 ? 0 : chip->temp;
+
+ return 0;
+}
+
+static int qpnp_tm_update_critical_trip_temp(struct qpnp_tm_chip *chip,
+ int temp)
+{
+ u8 reg;
+ bool disable_s2_shutdown = false;
+
+ WARN_ON(!mutex_is_locked(&chip->lock));
+
+ /*
+ * Default: S2 and S3 shutdown enabled, thresholds at
+ * 105C/125C/145C, monitoring at 25Hz
+ */
+ reg = SHUTDOWN_CTRL1_RATE_25HZ;
+
+ if (temp == THERMAL_TEMP_INVALID ||
+ temp < STAGE2_THRESHOLD_MIN) {
+ chip->thresh = THRESH_MIN;
+ goto skip;
+ }
+
+ if (temp <= STAGE2_THRESHOLD_MAX) {
+ chip->thresh = THRESH_MAX -
+ ((STAGE2_THRESHOLD_MAX - temp) /
+ TEMP_THRESH_STEP);
+ disable_s2_shutdown = true;
+ } else {
+ chip->thresh = THRESH_MAX;
+
+ if (chip->adc)
+ disable_s2_shutdown = true;
+ else
+ dev_warn(chip->dev,
+ "No ADC is configured and critical temperature is above the maximum stage 2 threshold of 140 C! Configuring stage 2 shutdown at 140 C.\n");
+ }
+
+skip:
+ reg |= chip->thresh;
+ if (disable_s2_shutdown)
+ reg |= SHUTDOWN_CTRL1_OVERRIDE_S2;
+
+ return qpnp_tm_write(chip, QPNP_TM_REG_SHUTDOWN_CTRL1, reg);
+}
+
+static int qpnp_tm_set_trip_temp(void *data, int trip, int temp)
+{
+ struct qpnp_tm_chip *chip = data;
+ const struct thermal_trip *trip_points;
+ int ret;
+
+ trip_points = of_thermal_get_trip_points(chip->tz_dev);
+ if (!trip_points)
+ return -EINVAL;
+
+ if (trip_points[trip].type != THERMAL_TRIP_CRITICAL)
+ return 0;
+
+ mutex_lock(&chip->lock);
+ ret = qpnp_tm_update_critical_trip_temp(chip, temp);
+ mutex_unlock(&chip->lock);
+
+ return ret;
+}
+
+static const struct thermal_zone_of_device_ops qpnp_tm_sensor_ops = {
+ .get_temp = qpnp_tm_get_temp,
+ .set_trip_temp = qpnp_tm_set_trip_temp,
+};
+
+static irqreturn_t qpnp_tm_isr(int irq, void *data)
+{
+ struct qpnp_tm_chip *chip = data;
+
+ thermal_zone_device_update(chip->tz_dev, THERMAL_EVENT_UNSPECIFIED);
+
+ return IRQ_HANDLED;
+}
+
+static int qpnp_tm_get_critical_trip_temp(struct qpnp_tm_chip *chip)
+{
+ int ntrips;
+ const struct thermal_trip *trips;
+ int i;
+
+ ntrips = of_thermal_get_ntrips(chip->tz_dev);
+ if (ntrips <= 0)
+ return THERMAL_TEMP_INVALID;
+
+ trips = of_thermal_get_trip_points(chip->tz_dev);
+ if (!trips)
+ return THERMAL_TEMP_INVALID;
+
+ for (i = 0; i < ntrips; i++) {
+ if (of_thermal_is_trip_valid(chip->tz_dev, i) &&
+ trips[i].type == THERMAL_TRIP_CRITICAL)
+ return trips[i].temperature;
+ }
+
+ return THERMAL_TEMP_INVALID;
+}
+
+/*
+ * This function initializes the internal temp value based on only the
+ * current thermal stage and threshold. Setup threshold control and
+ * disable shutdown override.
+ */
+static int qpnp_tm_init(struct qpnp_tm_chip *chip)
+{
+ unsigned int stage;
+ int ret;
+ u8 reg = 0;
+ int crit_temp;
+
+ mutex_lock(&chip->lock);
+
+ ret = qpnp_tm_read(chip, QPNP_TM_REG_SHUTDOWN_CTRL1, ®);
+ if (ret < 0)
+ goto out;
+
+ chip->thresh = reg & SHUTDOWN_CTRL1_THRESHOLD_MASK;
+ chip->temp = DEFAULT_TEMP;
+
+ ret = qpnp_tm_get_temp_stage(chip);
+ if (ret < 0)
+ goto out;
+ chip->stage = ret;
+
+ stage = chip->subtype == QPNP_TM_SUBTYPE_GEN1
+ ? chip->stage : alarm_state_map[chip->stage];
+
+ if (stage)
+ chip->temp = chip->thresh * TEMP_THRESH_STEP +
+ (stage - 1) * TEMP_STAGE_STEP +
+ TEMP_THRESH_MIN;
+
+ crit_temp = qpnp_tm_get_critical_trip_temp(chip);
+ ret = qpnp_tm_update_critical_trip_temp(chip, crit_temp);
+ if (ret < 0)
+ goto out;
+
+ /* Enable the thermal alarm PMIC module in always-on mode. */
+ reg = ALARM_CTRL_FORCE_ENABLE;
+ ret = qpnp_tm_write(chip, QPNP_TM_REG_ALARM_CTRL, reg);
+
+ chip->initialized = true;
+
+out:
+ mutex_unlock(&chip->lock);
+ return ret;
+}
+
+static int qpnp_tm_probe(struct platform_device *pdev)
+{
+ struct qpnp_tm_chip *chip;
+ struct device_node *node;
+ u8 type, subtype;
+ u32 res;
+ int ret, irq;
+
+ node = pdev->dev.of_node;
+
+ chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ dev_set_drvdata(&pdev->dev, chip);
+ chip->dev = &pdev->dev;
+
+ mutex_init(&chip->lock);
+
+ chip->map = dev_get_regmap(pdev->dev.parent, NULL);
+ if (!chip->map)
+ return -ENXIO;
+
+ ret = of_property_read_u32(node, "reg", &res);
+ if (ret < 0)
+ return ret;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
+ /* ADC based measurements are optional */
+ chip->adc = devm_iio_channel_get(&pdev->dev, "thermal");
+ if (IS_ERR(chip->adc)) {
+ ret = PTR_ERR(chip->adc);
+ chip->adc = NULL;
+ if (ret == -EPROBE_DEFER)
+ return ret;
+ }
+
+ chip->base = res;
+
+ ret = qpnp_tm_read(chip, QPNP_TM_REG_TYPE, &type);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "could not read type\n");
+ return ret;
+ }
+
+ ret = qpnp_tm_read(chip, QPNP_TM_REG_SUBTYPE, &subtype);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "could not read subtype\n");
+ return ret;
+ }
+
+ if (type != QPNP_TM_TYPE || (subtype != QPNP_TM_SUBTYPE_GEN1
+ && subtype != QPNP_TM_SUBTYPE_GEN2)) {
+ dev_err(&pdev->dev, "invalid type 0x%02x or subtype 0x%02x\n",
+ type, subtype);
+ return -ENODEV;
+ }
+
+ chip->subtype = subtype;
+
+ /*
+ * Register the sensor before initializing the hardware to be able to
+ * read the trip points. get_temp() returns the default temperature
+ * before the hardware initialization is completed.
+ */
+ chip->tz_dev = devm_thermal_zone_of_sensor_register(
+ &pdev->dev, 0, chip, &qpnp_tm_sensor_ops);
+ if (IS_ERR(chip->tz_dev)) {
+ dev_err(&pdev->dev, "failed to register sensor\n");
+ return PTR_ERR(chip->tz_dev);
+ }
+
+ ret = qpnp_tm_init(chip);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "init failed\n");
+ return ret;
+ }
+
+ ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, qpnp_tm_isr,
+ IRQF_ONESHOT, node->name, chip);
+ if (ret < 0)
+ return ret;
+
+ thermal_zone_device_update(chip->tz_dev, THERMAL_EVENT_UNSPECIFIED);
+
+ return 0;
+}
+
+static const struct of_device_id qpnp_tm_match_table[] = {
+ { .compatible = "qcom,spmi-temp-alarm" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, qpnp_tm_match_table);
+
+static struct platform_driver qpnp_tm_driver = {
+ .driver = {
+ .name = "spmi-temp-alarm",
+ .of_match_table = qpnp_tm_match_table,
+ },
+ .probe = qpnp_tm_probe,
+};
+module_platform_driver(qpnp_tm_driver);
+
+MODULE_ALIAS("platform:spmi-temp-alarm");
+MODULE_DESCRIPTION("QPNP PMIC Temperature Alarm driver");
+MODULE_LICENSE("GPL v2");
projects / openwrt / staging / blogic.git / commitdiff