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Commit 816cab93 authored by Zhang Rui's avatar Zhang Rui
Browse files

Thermal: introduce int3400 thermal driver 



Introduce int3400 thermal driver. And make INT3400 driver
enumerate the other int340x thermal components shown in _ART/_TRT.

Signed-off-by: default avatarZhang Rui <rui.zhang@intel.com>
parent e3ec483a

drivers/acpi/int340x_thermal.c

+1 −1
Original line number Diff line number Diff line
@@ -33,7 +33,7 @@ static const struct acpi_device_id int340x_thermal_device_ids[] = { 
static int int340x_thermal_handler_attach(struct acpi_device *adev,

					const struct acpi_device_id *id)

{

#ifdef CONFIG_INT340X_THERMAL

#if defined(CONFIG_INT340X_THERMAL) || defined(CONFIG_INT340X_THERMAL_MODULE)

	if (id->driver_data == DO_ENUMERATION)

		acpi_create_platform_device(adev);

#endif

drivers/thermal/Kconfig

+1 −1
Original line number Diff line number Diff line
@@ -235,7 +235,7 @@ config INTEL_SOC_DTS_THERMAL 
	  was set by the driver based on the TJ MAX temperature.



config INT340X_THERMAL

	bool

	tristate "ACPI INT340X thermal drivers"

	depends on X86 && ACPI

	help

	  Newer laptops and tablets that use ACPI may have thermal sensors and

drivers/thermal/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -32,4 +32,5 @@ obj-$(CONFIG_X86_PKG_TEMP_THERMAL) += x86_pkg_temp_thermal.o 
obj-$(CONFIG_INTEL_SOC_DTS_THERMAL)	+= intel_soc_dts_thermal.o

obj-$(CONFIG_TI_SOC_THERMAL)	+= ti-soc-thermal/

obj-$(CONFIG_ACPI_INT3403_THERMAL)	+= int3403_thermal.o

obj-$(CONFIG_INT340X_THERMAL)  += int340x_thermal/

obj-$(CONFIG_ST_THERMAL)	+= st/

drivers/thermal/int340x_thermal/Makefile

0 → 100644
+1 −0
Original line number Diff line number Diff line 
obj-$(CONFIG_INT340X_THERMAL)	+= int3400_thermal.o

drivers/thermal/int340x_thermal/int3400_thermal.c

0 → 100644
+245 −0
Original line number Diff line number Diff line 
/*

 * INT3400 thermal driver

 *

 * Copyright (C) 2014, Intel Corporation

 * Authors: Zhang Rui <rui.zhang@intel.com>

 *

 * 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.

 *

 */



#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/acpi.h>



struct art {

	acpi_handle source;

	acpi_handle target;

	u64 weight;

	u64 ac0_max;

	u64 ac1_max;

	u64 ac2_max;

	u64 ac3_max;

	u64 ac4_max;

	u64 ac5_max;

	u64 ac6_max;

	u64 ac7_max;

	u64 ac8_max;

	u64 ac9_max;

};



struct trt {

	acpi_handle source;

	acpi_handle target;

	u64 influence;

	u64 sampling_period;

	u64 reverved1;

	u64 reverved2;

	u64 reverved3;

	u64 reverved4;

};



struct int3400_thermal_priv {

	struct acpi_device *adev;

	int art_count;

	struct art *arts;

	int trt_count;

	struct trt *trts;

};



static int parse_art(struct int3400_thermal_priv *priv)

{

	acpi_handle handle = priv->adev->handle;

	acpi_status status;

	int result = 0;

	int i;

	struct acpi_device *adev;

	union acpi_object *p;

	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };

	struct acpi_buffer element = { 0, NULL };

	struct acpi_buffer art_format = {

				sizeof("RRNNNNNNNNNNN"), "RRNNNNNNNNNNN" };



	if (!acpi_has_method(handle, "_ART"))

		return 0;



	status = acpi_evaluate_object(handle, "_ART", NULL, &buffer);

	if (ACPI_FAILURE(status))

		return -ENODEV;



	p = buffer.pointer;

	if (!p || (p->type != ACPI_TYPE_PACKAGE)) {

		pr_err("Invalid _ART data\n");

		result = -EFAULT;

		goto end;

	}



	/* ignore p->package.elements[0], as this is _ART Revision field */

	priv->art_count = p->package.count - 1;

	priv->arts = kzalloc(sizeof(struct art) * priv->art_count, GFP_KERNEL);

	if (!priv->arts) {

		result = -ENOMEM;

		goto end;

	}



	for (i = 0; i < priv->art_count; i++) {

		struct art *art = &(priv->arts[i]);



		element.length = sizeof(struct art);

		element.pointer = art;



		status = acpi_extract_package(&(p->package.elements[i + 1]),

					      &art_format, &element);

		if (ACPI_FAILURE(status)) {

			pr_err("Invalid _ART data");

			result = -EFAULT;

			kfree(priv->arts);

			goto end;

		}

		result = acpi_bus_get_device(art->source, &adev);

		if (!result)

			acpi_create_platform_device(adev, NULL);

		else

			pr_warn("Failed to get source ACPI device\n");

		result = acpi_bus_get_device(art->target, &adev);

		if (!result)

			acpi_create_platform_device(adev, NULL);

		else

			pr_warn("Failed to get source ACPI device\n");

	}

end:

	kfree(buffer.pointer);

	return result;

}



static int parse_trt(struct int3400_thermal_priv *priv)

{

	acpi_handle handle = priv->adev->handle;

	acpi_status status;

	int result = 0;

	int i;

	struct acpi_device *adev;

	union acpi_object *p;

	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };

	struct acpi_buffer element = { 0, NULL };

	struct acpi_buffer trt_format = { sizeof("RRNNNNNN"), "RRNNNNNN" };



	if (!acpi_has_method(handle, "_TRT"))

		return 0;



	status = acpi_evaluate_object(handle, "_TRT", NULL, &buffer);

	if (ACPI_FAILURE(status))

		return -ENODEV;



	p = buffer.pointer;

	if (!p || (p->type != ACPI_TYPE_PACKAGE)) {

		pr_err("Invalid _TRT data\n");

		result = -EFAULT;

		goto end;

	}



	priv->trt_count = p->package.count;

	priv->trts = kzalloc(sizeof(struct trt) * priv->trt_count, GFP_KERNEL);

	if (!priv->trts) {

		result = -ENOMEM;

		goto end;

	}



	for (i = 0; i < priv->trt_count; i++) {

		struct trt *trt = &(priv->trts[i]);



		element.length = sizeof(struct trt);

		element.pointer = trt;



		status = acpi_extract_package(&(p->package.elements[i]),

					      &trt_format, &element);

		if (ACPI_FAILURE(status)) {

			pr_err("Invalid _ART data");

			result = -EFAULT;

			kfree(priv->trts);

			goto end;

		}



		result = acpi_bus_get_device(trt->source, &adev);

		if (!result)

			acpi_create_platform_device(adev, NULL);

		else

			pr_warn("Failed to get source ACPI device\n");

		result = acpi_bus_get_device(trt->target, &adev);

		if (!result)

			acpi_create_platform_device(adev, NULL);

		else

			pr_warn("Failed to get target ACPI device\n");

	}

end:

	kfree(buffer.pointer);

	return result;

}



static int int3400_thermal_probe(struct platform_device *pdev)

{

	struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);

	struct int3400_thermal_priv *priv;

	int result;



	if (!adev)

		return -ENODEV;



	priv = kzalloc(sizeof(struct int3400_thermal_priv), GFP_KERNEL);

	if (!priv)

		return -ENOMEM;



	priv->adev = adev;



	result = parse_art(priv);

	if (result)

		goto free_priv;



	result = parse_trt(priv);

	if (result)

		goto free_art;



	platform_set_drvdata(pdev, priv);



	return 0;

free_art:

	kfree(priv->arts);

free_priv:

	kfree(priv);

	return result;

}



static int int3400_thermal_remove(struct platform_device *pdev)

{

	struct int3400_thermal_priv *priv = platform_get_drvdata(pdev);



	kfree(priv->trts);

	kfree(priv->arts);

	kfree(priv);

	return 0;

}



static const struct acpi_device_id int3400_thermal_match[] = {

	{"INT3400", 0},

	{}

};



MODULE_DEVICE_TABLE(acpi, int3400_thermal_match);



static struct platform_driver int3400_thermal_driver = {

	.probe = int3400_thermal_probe,

	.remove = int3400_thermal_remove,

	.driver = {

		   .name = "int3400 thermal",

		   .owner = THIS_MODULE,

		   .acpi_match_table = ACPI_PTR(int3400_thermal_match),

		   },

};



module_platform_driver(int3400_thermal_driver);



MODULE_DESCRIPTION("INT3400 Thermal driver");

MODULE_AUTHOR("Zhang Rui <rui.zhang@intel.com>");

MODULE_LICENSE("GPL");