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: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>

1 files changed, 28 insertions, 34 deletions

diff --git a/drivers/acpi/fan.c b/drivers/acpi/fan.c
index fff9696bea25..8a5b450576df 100644
--- a/drivers/acpi/fan.c
+++ b/drivers/acpi/fan.c
@@ -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,
-                .remove = acpi_fan_remove,
-                },
-        .drv.pm = FAN_PM_OPS_PTR,
+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,
+        },
 };
 
 /* 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 @@ end:
         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);