Merge "thermal: qcom-spmi-temp-alarm: add support for GEN2 PMIC peripherals" (4416159a) · Commits · e / devices / android_kernel_fairphone_FP3

drivers/thermal/qcom-spmi-temp-alarm.c

+71 −21

Original line number	Diff line number	Diff line
		/*
		* Copyright (c) 2011-2015, The Linux Foundation. All rights reserved.
		* 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
		@@ -11,6 +11,7 @@
		* GNU General Public License for more details.
		*/

		#include <linux/bitops.h>
		#include <linux/delay.h>
		#include <linux/err.h>
		#include <linux/iio/consumer.h>
		@@ -29,13 +30,17 @@
		#define QPNP_TM_REG_ALARM_CTRL 0x46

		#define QPNP_TM_TYPE 0x09
		#define QPNP_TM_SUBTYPE 0x08
		#define QPNP_TM_SUBTYPE_GEN1 0x08
		#define QPNP_TM_SUBTYPE_GEN2 0x09

		#define STATUS_STAGE_MASK 0x03
		#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_THRESHOLD_MASK 0x03
		#define SHUTDOWN_CTRL1_OVERRIDE_MASK GENMASK(7, 6)
		#define SHUTDOWN_CTRL1_THRESHOLD_MASK GENMASK(1, 0)

		#define ALARM_CTRL_FORCE_ENABLE 0x80
		#define ALARM_CTRL_FORCE_ENABLE BIT(7)

		/*
		* Trip point values based on threshold control
		@@ -58,6 +63,7 @@
		struct qpnp_tm_chip {
		struct regmap *map;
		struct thermal_zone_device *tz_dev;
		unsigned int subtype;
		long temp;
		unsigned int thresh;
		unsigned int stage;
		@@ -66,6 +72,9 @@ struct qpnp_tm_chip {
		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;
		@@ -84,30 +93,59 @@ 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, &reg);
		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;
		unsigned int stage, stage_new, stage_old;
		int ret;
		u8 reg = 0;

		ret = qpnp_tm_read(chip, QPNP_TM_REG_STATUS, &reg);
		ret = qpnp_tm_get_temp_stage(chip);
		if (ret < 0)
		return ret;
		stage = ret;

		stage = reg & STATUS_STAGE_MASK;
		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 > chip->stage) {
		if (stage_new > stage_old) {
		/* increasing stage, use lower bound */
		chip->temp = (stage - 1) * TEMP_STAGE_STEP +
		chip->temp = (stage_new - 1) * TEMP_STAGE_STEP +
		chip->thresh * TEMP_THRESH_STEP +
		TEMP_STAGE_HYSTERESIS + TEMP_THRESH_MIN;
		} else if (stage < chip->stage) {
		} else if (stage_new < stage_old) {
		/* decreasing stage, use upper bound */
		chip->temp = stage * TEMP_STAGE_STEP +
		chip->temp = stage_new * TEMP_STAGE_STEP +
		chip->thresh * TEMP_THRESH_STEP -
		TEMP_STAGE_HYSTERESIS + TEMP_THRESH_MIN;
		}
		@@ -162,28 +200,37 @@ static irqreturn_t qpnp_tm_isr(int irq, void *data)
		*/
		static int qpnp_tm_init(struct qpnp_tm_chip *chip)
		{
		unsigned int stage;
		int ret;
		u8 reg;
		u8 reg = 0;

		chip->thresh = THRESH_MIN;
		ret = qpnp_tm_read(chip, QPNP_TM_REG_SHUTDOWN_CTRL1, &reg);
		if (ret < 0)
		return ret;

		chip->thresh = reg & SHUTDOWN_CTRL1_THRESHOLD_MASK;
		chip->temp = DEFAULT_TEMP;

		ret = qpnp_tm_read(chip, QPNP_TM_REG_STATUS, &reg);
		ret = qpnp_tm_get_temp_stage(chip);
		if (ret < 0)
		return ret;
		chip->stage = ret;

		chip->stage = reg & STATUS_STAGE_MASK;
		stage = chip->subtype == QPNP_TM_SUBTYPE_GEN1
		? chip->stage : alarm_state_map[chip->stage];

		if (chip->stage)
		if (stage)
		chip->temp = chip->thresh * TEMP_THRESH_STEP +
		(chip->stage - 1) * TEMP_STAGE_STEP +
		(stage - 1) * TEMP_STAGE_STEP +
		TEMP_THRESH_MIN;

		/*
		* Set threshold and disable software override of stage 2 and 3
		* shutdowns.
		*/
		reg = chip->thresh & SHUTDOWN_CTRL1_THRESHOLD_MASK;
		chip->thresh = THRESH_MIN;
		reg &= ~(SHUTDOWN_CTRL1_OVERRIDE_MASK \| SHUTDOWN_CTRL1_THRESHOLD_MASK);
		reg \|= chip->thresh & SHUTDOWN_CTRL1_THRESHOLD_MASK;
		ret = qpnp_tm_write(chip, QPNP_TM_REG_SHUTDOWN_CTRL1, reg);
		if (ret < 0)
		return ret;
		@@ -242,13 +289,16 @@ static int qpnp_tm_probe(struct platform_device *pdev)
		goto fail;
		}

		if (type != QPNP_TM_TYPE \|\| subtype != QPNP_TM_SUBTYPE) {
		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);
		ret = -ENODEV;
		goto fail;
		}

		chip->subtype = subtype;

		ret = qpnp_tm_init(chip);
		if (ret < 0) {
		dev_err(&pdev->dev, "init failed\n");