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Commit 19593a1f authored by Aaron Lu's avatar Aaron Lu Committed by Zhang Rui
Browse files

ACPI / fan: convert to platform driver 



Convert ACPI fan driver to a platform driver for the purpose of phasing
out ACPI bus.

Signed-off-by: default avatarAaron Lu <aaron.lu@intel.com>
Signed-off-by: default avatarZhang Rui <rui.zhang@intel.com>
parent 2bb3a2bf

drivers/acpi/fan.c

+28 −34
Original line number Diff line number Diff line
@@ -30,17 +30,14 @@ 
#include <asm/uaccess.h>

#include <linux/thermal.h>

#include <linux/acpi.h>



#define PREFIX "ACPI: "



#define ACPI_FAN_CLASS			"fan"

#include <linux/platform_device.h>



MODULE_AUTHOR("Paul Diefenbaugh");

MODULE_DESCRIPTION("ACPI Fan Driver");

MODULE_LICENSE("GPL");



static int acpi_fan_add(struct acpi_device *device);

static int acpi_fan_remove(struct acpi_device *device);

static int acpi_fan_probe(struct platform_device *pdev);

static int acpi_fan_remove(struct platform_device *pdev);



static const struct acpi_device_id fan_device_ids[] = {

	{"PNP0C0B", 0},
@@ -62,15 +59,14 @@ static struct dev_pm_ops acpi_fan_pm = { 
#define FAN_PM_OPS_PTR NULL

#endif



static struct acpi_driver acpi_fan_driver = {

	.name = "fan",

	.class = ACPI_FAN_CLASS,

	.ids = fan_device_ids,

	.ops = {

		.add = acpi_fan_add,

static struct platform_driver acpi_fan_driver = {

	.probe = acpi_fan_probe,

	.remove = acpi_fan_remove,

	.driver = {

		.name = "acpi-fan",

		.acpi_match_table = fan_device_ids,

		.pm = FAN_PM_OPS_PTR,

	},

	.drv.pm = FAN_PM_OPS_PTR,

};



/* thermal cooling device callbacks */
@@ -126,17 +122,15 @@ static const struct thermal_cooling_device_ops fan_cooling_ops = { 
                                 Driver Interface

   -------------------------------------------------------------------------- */



static int acpi_fan_add(struct acpi_device *device)

static int acpi_fan_probe(struct platform_device *pdev)

{

	int result = 0;

	struct thermal_cooling_device *cdev;



	strcpy(acpi_device_name(device), "Fan");

	strcpy(acpi_device_class(device), ACPI_FAN_CLASS);

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



	result = acpi_device_update_power(device, NULL);

	if (result) {

		printk(KERN_ERR PREFIX "Setting initial power state\n");

		dev_err(&pdev->dev, "Setting initial power state\n");

		goto end;

	}
@@ -147,24 +141,24 @@ static int acpi_fan_add(struct acpi_device *device) 
		goto end;

	}



	dev_dbg(&device->dev, "registered as cooling_device%d\n", cdev->id);

	dev_dbg(&pdev->dev, "registered as cooling_device%d\n", cdev->id);



	device->driver_data = cdev;

	result = sysfs_create_link(&device->dev.kobj,

	platform_set_drvdata(pdev, cdev);

	result = sysfs_create_link(&pdev->dev.kobj,

				   &cdev->device.kobj,

				   "thermal_cooling");

	if (result)

		dev_err(&device->dev, "Failed to create sysfs link "

		dev_err(&pdev->dev, "Failed to create sysfs link "

			"'thermal_cooling'\n");



	result = sysfs_create_link(&cdev->device.kobj,

				   &device->dev.kobj,

				   &pdev->dev.kobj,

				   "device");

	if (result)

		dev_err(&device->dev, "Failed to create sysfs link "

		dev_err(&pdev->dev, "Failed to create sysfs link "

			"'device'\n");



	printk(KERN_INFO PREFIX "%s [%s] (%s)\n",

	dev_info(&pdev->dev, "%s [%s] (%s)\n",

	       acpi_device_name(device), acpi_device_bid(device),

	       !device->power.state ? "on" : "off");
@@ -172,11 +166,11 @@ static int acpi_fan_add(struct acpi_device *device) 
	return result;

}



static int acpi_fan_remove(struct acpi_device *device)

static int acpi_fan_remove(struct platform_device *pdev)

{

	struct thermal_cooling_device *cdev = acpi_driver_data(device);

	struct thermal_cooling_device *cdev = platform_get_drvdata(pdev);



	sysfs_remove_link(&device->dev.kobj, "thermal_cooling");

	sysfs_remove_link(&pdev->dev.kobj, "thermal_cooling");

	sysfs_remove_link(&cdev->device.kobj, "device");

	thermal_cooling_device_unregister(cdev);
@@ -186,7 +180,7 @@ static int acpi_fan_remove(struct acpi_device *device) 
#ifdef CONFIG_PM_SLEEP

static int acpi_fan_suspend(struct device *dev)

{

	acpi_device_set_power(to_acpi_device(dev), ACPI_STATE_D0);

	acpi_device_set_power(ACPI_COMPANION(dev), ACPI_STATE_D0);



	return AE_OK;

}
@@ -195,12 +189,12 @@ static int acpi_fan_resume(struct device *dev) 
{

	int result;



	result = acpi_device_update_power(to_acpi_device(dev), NULL);

	result = acpi_device_update_power(ACPI_COMPANION(dev), NULL);

	if (result)

		printk(KERN_ERR PREFIX "Error updating fan power state\n");

		dev_err(dev, "Error updating fan power state\n");



	return result;

}

#endif



module_acpi_driver(acpi_fan_driver);
 
module_platform_driver(acpi_fan_driver);