[mirror_ubuntu-artful-kernel.git] / drivers / thermal / int340x_thermal / int3402_thermal.c

/*
 * INT3402 thermal driver for memory temperature reporting
 *
 * Copyright (C) 2014, Intel Corporation
 * Authors: Aaron Lu <aaron.lu@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>
#include <linux/thermal.h>
#include "int340x_thermal_zone.h"

#define INT3402_PERF_CHANGED_EVENT	0x80
#define INT3402_THERMAL_EVENT		0x90

struct int3402_thermal_data {
	acpi_handle *handle;
	struct int34x_thermal_zone *int340x_zone;
};

static void int3402_notify(acpi_handle handle, u32 event, void *data)
{
	struct int3402_thermal_data *priv = data;

	if (!priv)
		return;

	switch (event) {
	case INT3402_PERF_CHANGED_EVENT:
		break;
	case INT3402_THERMAL_EVENT:
		int340x_thermal_zone_device_update(priv->int340x_zone,
						   THERMAL_TRIP_VIOLATED);
		break;
	default:
		break;
	}
}

static int int3402_thermal_probe(struct platform_device *pdev)
{
	struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);
	struct int3402_thermal_data *d;
	int ret;

	if (!acpi_has_method(adev->handle, "_TMP"))
		return -ENODEV;

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

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

	ret = acpi_install_notify_handler(adev->handle,
					  ACPI_DEVICE_NOTIFY,
					  int3402_notify,
					  d);
	if (ret) {
		int340x_thermal_zone_remove(d->int340x_zone);
		return ret;
	}

	d->handle = adev->handle;
	platform_set_drvdata(pdev, d);

	return 0;
}

static int int3402_thermal_remove(struct platform_device *pdev)
{
	struct int3402_thermal_data *d = platform_get_drvdata(pdev);

	acpi_remove_notify_handler(d->handle,
				   ACPI_DEVICE_NOTIFY, int3402_notify);
	int340x_thermal_zone_remove(d->int340x_zone);

	return 0;
}

static const struct acpi_device_id int3402_thermal_match[] = {
	{"INT3402", 0},
	{}
};

MODULE_DEVICE_TABLE(acpi, int3402_thermal_match);

static struct platform_driver int3402_thermal_driver = {
	.probe = int3402_thermal_probe,
	.remove = int3402_thermal_remove,
	.driver = {
		   .name = "int3402 thermal",
		   .acpi_match_table = int3402_thermal_match,
		   },
};

module_platform_driver(int3402_thermal_driver);

MODULE_DESCRIPTION("INT3402 Thermal driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
77e337c6 AL	1	/*
	2	* INT3402 thermal driver for memory temperature reporting
	3	*
	4	* Copyright (C) 2014, Intel Corporation
	5	* Authors: Aaron Lu <aaron.lu@intel.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*
	11	*/
	12
	13	#include <linux/module.h>
	14	#include <linux/platform_device.h>
	15	#include <linux/acpi.h>
	16	#include <linux/thermal.h>
820cdeba	17	#include "int340x_thermal_zone.h"
77e337c6	18
acebf7ee SP	19	#define INT3402_PERF_CHANGED_EVENT 0x80
	20	#define INT3402_THERMAL_EVENT 0x90
	21
77e337c6	22	struct int3402_thermal_data {
77e337c6	23	acpi_handle *handle;
820cdeba	24	struct int34x_thermal_zone *int340x_zone;
77e337c6 AL	25	};
77e337c6 AL	26
acebf7ee SP	27	static void int3402_notify(acpi_handle handle, u32 event, void *data)
	28	{
	29	struct int3402_thermal_data *priv = data;
	30
	31	if (!priv)
	32	return;
	33
	34	switch (event) {
	35	case INT3402_PERF_CHANGED_EVENT:
	36	break;
	37	case INT3402_THERMAL_EVENT:
9176ae86 SP	38	int340x_thermal_zone_device_update(priv->int340x_zone,
9176ae86 SP	39	THERMAL_TRIP_VIOLATED);
acebf7ee SP	40	break;
	41	default:
	42	break;
	43	}
	44	}
	45
77e337c6 AL	46	static int int3402_thermal_probe(struct platform_device *pdev)
	47	{
	48	struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);
	49	struct int3402_thermal_data *d;
acebf7ee	50	int ret;
77e337c6 AL	51
	52	if (!acpi_has_method(adev->handle, "_TMP"))
	53	return -ENODEV;
	54
	55	d = devm_kzalloc(&pdev->dev, sizeof(*d), GFP_KERNEL);
	56	if (!d)
	57	return -ENOMEM;
	58
820cdeba SP	59	d->int340x_zone = int340x_thermal_zone_add(adev, NULL);
	60	if (IS_ERR(d->int340x_zone))
	61	return PTR_ERR(d->int340x_zone);
	62
acebf7ee SP	63	ret = acpi_install_notify_handler(adev->handle,
	64	ACPI_DEVICE_NOTIFY,
	65	int3402_notify,
	66	d);
	67	if (ret) {
	68	int340x_thermal_zone_remove(d->int340x_zone);
	69	return ret;
	70	}
	71
820cdeba SP	72	d->handle = adev->handle;
820cdeba SP	73	platform_set_drvdata(pdev, d);
77e337c6 AL	74
	75	return 0;
	76	}
	77
	78	static int int3402_thermal_remove(struct platform_device *pdev)
	79	{
820cdeba SP	80	struct int3402_thermal_data *d = platform_get_drvdata(pdev);
820cdeba SP	81
acebf7ee SP	82	acpi_remove_notify_handler(d->handle,
acebf7ee SP	83	ACPI_DEVICE_NOTIFY, int3402_notify);
820cdeba	84	int340x_thermal_zone_remove(d->int340x_zone);
77e337c6	85
77e337c6 AL	86	return 0;
	87	}
	88
	89	static const struct acpi_device_id int3402_thermal_match[] = {
	90	{"INT3402", 0},
	91	{}
	92	};
	93
	94	MODULE_DEVICE_TABLE(acpi, int3402_thermal_match);
	95
	96	static struct platform_driver int3402_thermal_driver = {
	97	.probe = int3402_thermal_probe,
	98	.remove = int3402_thermal_remove,
	99	.driver = {
	100	.name = "int3402 thermal",
77e337c6 AL	101	.acpi_match_table = int3402_thermal_match,
	102	},
	103	};
	104
	105	module_platform_driver(int3402_thermal_driver);
	106
	107	MODULE_DESCRIPTION("INT3402 Thermal driver");
	108	MODULE_LICENSE("GPL");