drivers/thermal/int340x_thermal/int3403_thermal.c - kernel/msm-4.19 - Gitiles

 /*
  * ACPI INT3403 thermal driver
  * Copyright (c) 2013, Intel Corporation.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,
  * version 2, as published by the Free Software Foundation.
  *
  * This program is distributed in the hope 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/kernel.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/types.h>
 #include <linux/acpi.h>
 #include <linux/thermal.h>
 #include <linux/platform_device.h>
 #include "int340x_thermal_zone.h"

 #define INT3403_TYPE_SENSOR		0x03
 #define INT3403_TYPE_CHARGER		0x0B
 #define INT3403_TYPE_BATTERY		0x0C
 #define INT3403_PERF_CHANGED_EVENT	0x80
 #define INT3403_PERF_TRIP_POINT_CHANGED	0x81
 #define INT3403_THERMAL_EVENT		0x90

 /* Preserved structure for future expandbility */
 struct int3403_sensor {
 	struct int34x_thermal_zone *int340x_zone;
 };

 struct int3403_performance_state {
 	u64 performance;
 	u64 power;
 	u64 latency;
 	u64 linear;
 	u64 control;
 	u64 raw_performace;
 	char *raw_unit;
 	int reserved;
 };

 struct int3403_cdev {
 	struct thermal_cooling_device *cdev;
 	unsigned long max_state;
 };

 struct int3403_priv {
 	struct platform_device *pdev;
 	struct acpi_device *adev;
 	unsigned long long type;
 	void *priv;
 };

 static void int3403_notify(acpi_handle handle,
 		u32 event, void *data)
 {
 	struct int3403_priv *priv = data;
 	struct int3403_sensor *obj;

 	if (!priv)
 		return;

 	obj = priv->priv;
 	if (priv->type != INT3403_TYPE_SENSOR || !obj)
 		return;

 	switch (event) {
 	case INT3403_PERF_CHANGED_EVENT:
 		break;
 	case INT3403_THERMAL_EVENT:
 		int340x_thermal_zone_device_update(obj->int340x_zone,
 						   THERMAL_TRIP_VIOLATED);
 		break;
 	case INT3403_PERF_TRIP_POINT_CHANGED:
 		int340x_thermal_read_trips(obj->int340x_zone);
 		int340x_thermal_zone_device_update(obj->int340x_zone,
 						   THERMAL_TRIP_CHANGED);
 		break;
 	default:
 		dev_err(&priv->pdev->dev, "Unsupported event [0x%x]\n", event);
 		break;
 	}
 }

 static int int3403_sensor_add(struct int3403_priv *priv)
 {
 	int result = 0;
 	struct int3403_sensor *obj;

 	obj = devm_kzalloc(&priv->pdev->dev, sizeof(*obj), GFP_KERNEL);
 	if (!obj)
 		return -ENOMEM;

 	priv->priv = obj;

 	obj->int340x_zone = int340x_thermal_zone_add(priv->adev, NULL);
 	if (IS_ERR(obj->int340x_zone))
 		return PTR_ERR(obj->int340x_zone);

 	result = acpi_install_notify_handler(priv->adev->handle,
 			ACPI_DEVICE_NOTIFY, int3403_notify,
 			(void *)priv);
 	if (result)
 		goto err_free_obj;

 	return 0;

  err_free_obj:
 	int340x_thermal_zone_remove(obj->int340x_zone);
 	return result;
 }

 static int int3403_sensor_remove(struct int3403_priv *priv)
 {
 	struct int3403_sensor *obj = priv->priv;

 	acpi_remove_notify_handler(priv->adev->handle,
 				   ACPI_DEVICE_NOTIFY, int3403_notify);
 	int340x_thermal_zone_remove(obj->int340x_zone);

 	return 0;
 }

 /* INT3403 Cooling devices */
 static int int3403_get_max_state(struct thermal_cooling_device *cdev,
 				 unsigned long *state)
 {
 	struct int3403_priv *priv = cdev->devdata;
 	struct int3403_cdev *obj = priv->priv;

 	*state = obj->max_state;
 	return 0;
 }

 static int int3403_get_cur_state(struct thermal_cooling_device *cdev,
 				 unsigned long *state)
 {
 	struct int3403_priv *priv = cdev->devdata;
 	unsigned long long level;
 	acpi_status status;

 	status = acpi_evaluate_integer(priv->adev->handle, "PPPC", NULL, &level);
 	if (ACPI_SUCCESS(status)) {
 		*state = level;
 		return 0;
 	} else
 		return -EINVAL;
 }

 static int
 int3403_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state)
 {
 	struct int3403_priv *priv = cdev->devdata;
 	acpi_status status;

 	status = acpi_execute_simple_method(priv->adev->handle, "SPPC", state);
 	if (ACPI_SUCCESS(status))
 		return 0;
 	else
 		return -EINVAL;
 }

 static const struct thermal_cooling_device_ops int3403_cooling_ops = {
 	.get_max_state = int3403_get_max_state,
 	.get_cur_state = int3403_get_cur_state,
 	.set_cur_state = int3403_set_cur_state,
 };

 static int int3403_cdev_add(struct int3403_priv *priv)
 {
 	int result = 0;
 	acpi_status status;
 	struct int3403_cdev *obj;
 	struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
 	union acpi_object *p;

 	obj = devm_kzalloc(&priv->pdev->dev, sizeof(*obj), GFP_KERNEL);
 	if (!obj)
 		return -ENOMEM;

 	status = acpi_evaluate_object(priv->adev->handle, "PPSS", NULL, &buf);
 	if (ACPI_FAILURE(status))
 		return -ENODEV;

 	p = buf.pointer;
 	if (!p || (p->type != ACPI_TYPE_PACKAGE)) {
 		printk(KERN_WARNING "Invalid PPSS data\n");
 		kfree(buf.pointer);
 		return -EFAULT;
 	}

 	obj->max_state = p->package.count - 1;
 	obj->cdev =
 		thermal_cooling_device_register(acpi_device_bid(priv->adev),
 				priv, &int3403_cooling_ops);
 	if (IS_ERR(obj->cdev))
 		result = PTR_ERR(obj->cdev);

 	priv->priv = obj;

 	kfree(buf.pointer);
 	/* TODO: add ACPI notification support */

 	return result;
 }

 static int int3403_cdev_remove(struct int3403_priv *priv)
 {
 	struct int3403_cdev *obj = priv->priv;

 	thermal_cooling_device_unregister(obj->cdev);
 	return 0;
 }

 static int int3403_add(struct platform_device *pdev)
 {
 	struct int3403_priv *priv;
 	int result = 0;
 	acpi_status status;

 	priv = devm_kzalloc(&pdev->dev, sizeof(struct int3403_priv),
 			    GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;

 	priv->pdev = pdev;
 	priv->adev = ACPI_COMPANION(&(pdev->dev));
 	if (!priv->adev) {
 		result = -EINVAL;
 		goto err;
 	}

 	status = acpi_evaluate_integer(priv->adev->handle, "PTYP",
 				       NULL, &priv->type);
 	if (ACPI_FAILURE(status)) {
 		result = -EINVAL;
 		goto err;
 	}

 	platform_set_drvdata(pdev, priv);
 	switch (priv->type) {
 	case INT3403_TYPE_SENSOR:
 		result = int3403_sensor_add(priv);
 		break;
 	case INT3403_TYPE_CHARGER:
 	case INT3403_TYPE_BATTERY:
 		result = int3403_cdev_add(priv);
 		break;
 	default:
 		result = -EINVAL;
 	}

 	if (result)
 		goto err;
 	return result;

 err:
 	return result;
 }

 static int int3403_remove(struct platform_device *pdev)
 {
 	struct int3403_priv *priv = platform_get_drvdata(pdev);

 	switch (priv->type) {
 	case INT3403_TYPE_SENSOR:
 		int3403_sensor_remove(priv);
 		break;
 	case INT3403_TYPE_CHARGER:
 	case INT3403_TYPE_BATTERY:
 		int3403_cdev_remove(priv);
 		break;
 	default:
 		break;
 	}

 	return 0;
 }

 static const struct acpi_device_id int3403_device_ids[] = {
 	{"INT3403", 0},
 	{"", 0},
 };
 MODULE_DEVICE_TABLE(acpi, int3403_device_ids);

 static struct platform_driver int3403_driver = {
 	.probe = int3403_add,
 	.remove = int3403_remove,
 	.driver = {
 		.name = "int3403 thermal",
 		.acpi_match_table = int3403_device_ids,
 	},
 };

 module_platform_driver(int3403_driver);

 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
 MODULE_LICENSE("GPL v2");
 MODULE_DESCRIPTION("ACPI INT3403 thermal driver");
	/*
	* ACPI INT3403 thermal driver
	* Copyright (c) 2013, Intel Corporation.
	*
	* This program is free software; you can redistribute it and/or modify it
	* under the terms and conditions of the GNU General Public License,
	* version 2, as published by the Free Software Foundation.
	*
	* This program is distributed in the hope 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/kernel.h>
	#include <linux/module.h>
	#include <linux/init.h>
	#include <linux/types.h>
	#include <linux/acpi.h>
	#include <linux/thermal.h>
	#include <linux/platform_device.h>
	#include "int340x_thermal_zone.h"

	#define INT3403_TYPE_SENSOR 0x03
	#define INT3403_TYPE_CHARGER 0x0B
	#define INT3403_TYPE_BATTERY 0x0C
	#define INT3403_PERF_CHANGED_EVENT 0x80
	#define INT3403_PERF_TRIP_POINT_CHANGED 0x81
	#define INT3403_THERMAL_EVENT 0x90

	/* Preserved structure for future expandbility */
	struct int3403_sensor {
	struct int34x_thermal_zone *int340x_zone;
	};

	struct int3403_performance_state {
	u64 performance;
	u64 power;
	u64 latency;
	u64 linear;
	u64 control;
	u64 raw_performace;
	char *raw_unit;
	int reserved;
	};

	struct int3403_cdev {
	struct thermal_cooling_device *cdev;
	unsigned long max_state;
	};

	struct int3403_priv {
	struct platform_device *pdev;
	struct acpi_device *adev;
	unsigned long long type;
	void *priv;
	};

	static void int3403_notify(acpi_handle handle,
	u32 event, void *data)
	{
	struct int3403_priv *priv = data;
	struct int3403_sensor *obj;

	if (!priv)
	return;

	obj = priv->priv;
	if (priv->type != INT3403_TYPE_SENSOR \|\| !obj)
	return;

	switch (event) {
	case INT3403_PERF_CHANGED_EVENT:
	break;
	case INT3403_THERMAL_EVENT:
	int340x_thermal_zone_device_update(obj->int340x_zone,
	THERMAL_TRIP_VIOLATED);
	break;
	case INT3403_PERF_TRIP_POINT_CHANGED:
	int340x_thermal_read_trips(obj->int340x_zone);
	int340x_thermal_zone_device_update(obj->int340x_zone,
	THERMAL_TRIP_CHANGED);
	break;
	default:
	dev_err(&priv->pdev->dev, "Unsupported event [0x%x]\n", event);
	break;
	}
	}

	static int int3403_sensor_add(struct int3403_priv *priv)
	{
	int result = 0;
	struct int3403_sensor *obj;

	obj = devm_kzalloc(&priv->pdev->dev, sizeof(*obj), GFP_KERNEL);
	if (!obj)
	return -ENOMEM;

	priv->priv = obj;

	obj->int340x_zone = int340x_thermal_zone_add(priv->adev, NULL);
	if (IS_ERR(obj->int340x_zone))
	return PTR_ERR(obj->int340x_zone);

	result = acpi_install_notify_handler(priv->adev->handle,
	ACPI_DEVICE_NOTIFY, int3403_notify,
	(void *)priv);
	if (result)
	goto err_free_obj;

	return 0;

	err_free_obj:
	int340x_thermal_zone_remove(obj->int340x_zone);
	return result;
	}

	static int int3403_sensor_remove(struct int3403_priv *priv)
	{
	struct int3403_sensor *obj = priv->priv;

	acpi_remove_notify_handler(priv->adev->handle,
	ACPI_DEVICE_NOTIFY, int3403_notify);
	int340x_thermal_zone_remove(obj->int340x_zone);

	return 0;
	}

	/* INT3403 Cooling devices */
	static int int3403_get_max_state(struct thermal_cooling_device *cdev,
	unsigned long *state)
	{
	struct int3403_priv *priv = cdev->devdata;
	struct int3403_cdev *obj = priv->priv;

	*state = obj->max_state;
	return 0;
	}

	static int int3403_get_cur_state(struct thermal_cooling_device *cdev,
	unsigned long *state)
	{
	struct int3403_priv *priv = cdev->devdata;
	unsigned long long level;
	acpi_status status;

	status = acpi_evaluate_integer(priv->adev->handle, "PPPC", NULL, &level);
	if (ACPI_SUCCESS(status)) {
	*state = level;
	return 0;
	} else
	return -EINVAL;
	}

	static int
	int3403_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state)
	{
	struct int3403_priv *priv = cdev->devdata;
	acpi_status status;

	status = acpi_execute_simple_method(priv->adev->handle, "SPPC", state);
	if (ACPI_SUCCESS(status))
	return 0;
	else
	return -EINVAL;
	}

	static const struct thermal_cooling_device_ops int3403_cooling_ops = {
	.get_max_state = int3403_get_max_state,
	.get_cur_state = int3403_get_cur_state,
	.set_cur_state = int3403_set_cur_state,
	};

	static int int3403_cdev_add(struct int3403_priv *priv)
	{
	int result = 0;
	acpi_status status;
	struct int3403_cdev *obj;
	struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
	union acpi_object *p;

	obj = devm_kzalloc(&priv->pdev->dev, sizeof(*obj), GFP_KERNEL);
	if (!obj)
	return -ENOMEM;

	status = acpi_evaluate_object(priv->adev->handle, "PPSS", NULL, &buf);
	if (ACPI_FAILURE(status))
	return -ENODEV;

	p = buf.pointer;
	if (!p \|\| (p->type != ACPI_TYPE_PACKAGE)) {
	printk(KERN_WARNING "Invalid PPSS data\n");
	kfree(buf.pointer);
	return -EFAULT;
	}

	obj->max_state = p->package.count - 1;
	obj->cdev =
	thermal_cooling_device_register(acpi_device_bid(priv->adev),
	priv, &int3403_cooling_ops);
	if (IS_ERR(obj->cdev))
	result = PTR_ERR(obj->cdev);

	priv->priv = obj;

	kfree(buf.pointer);
	/* TODO: add ACPI notification support */

	return result;
	}

	static int int3403_cdev_remove(struct int3403_priv *priv)
	{
	struct int3403_cdev *obj = priv->priv;

	thermal_cooling_device_unregister(obj->cdev);
	return 0;
	}

	static int int3403_add(struct platform_device *pdev)
	{
	struct int3403_priv *priv;
	int result = 0;
	acpi_status status;

	priv = devm_kzalloc(&pdev->dev, sizeof(struct int3403_priv),
	GFP_KERNEL);
	if (!priv)
	return -ENOMEM;

	priv->pdev = pdev;
	priv->adev = ACPI_COMPANION(&(pdev->dev));
	if (!priv->adev) {
	result = -EINVAL;
	goto err;
	}

	status = acpi_evaluate_integer(priv->adev->handle, "PTYP",
	NULL, &priv->type);
	if (ACPI_FAILURE(status)) {
	result = -EINVAL;
	goto err;
	}

	platform_set_drvdata(pdev, priv);
	switch (priv->type) {
	case INT3403_TYPE_SENSOR:
	result = int3403_sensor_add(priv);
	break;
	case INT3403_TYPE_CHARGER:
	case INT3403_TYPE_BATTERY:
	result = int3403_cdev_add(priv);
	break;
	default:
	result = -EINVAL;
	}

	if (result)
	goto err;
	return result;

	err:
	return result;
	}

	static int int3403_remove(struct platform_device *pdev)
	{
	struct int3403_priv *priv = platform_get_drvdata(pdev);

	switch (priv->type) {
	case INT3403_TYPE_SENSOR:
	int3403_sensor_remove(priv);
	break;
	case INT3403_TYPE_CHARGER:
	case INT3403_TYPE_BATTERY:
	int3403_cdev_remove(priv);
	break;
	default:
	break;
	}

	return 0;
	}

	static const struct acpi_device_id int3403_device_ids[] = {
	{"INT3403", 0},
	{"", 0},
	};
	MODULE_DEVICE_TABLE(acpi, int3403_device_ids);

	static struct platform_driver int3403_driver = {
	.probe = int3403_add,
	.remove = int3403_remove,
	.driver = {
	.name = "int3403 thermal",
	.acpi_match_table = int3403_device_ids,
	},
	};

	module_platform_driver(int3403_driver);

	MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
	MODULE_LICENSE("GPL v2");
	MODULE_DESCRIPTION("ACPI INT3403 thermal driver");