[PATCH 3/3] Drop platform sysfs support

[Mario Limonciello]

With rfkill support being added, the platform support is no longer
necessary.  Standard rfkill interfaces can be used to administer the box
now.
-- 
Mario Limonciello
*Dell | Linux Engineering*
mario_limonciello@xxxxxxxx
--- drivers/platform/x86/compal-laptop.c.old	2009-08-17 07:02:15.012836625 -0500
+++ drivers/platform/x86/compal-laptop.c	2009-08-17 07:03:03.925633380 -0500
@@ -26,13 +26,6 @@
 /*
  * comapl-laptop.c - Compal laptop support.
  *
- * This driver exports a few files in /sys/devices/platform/compal-laptop/:
- *
- *   wlan - wlan subsystem state: contains 0 or 1 (rw)
- *
- *   bluetooth - Bluetooth subsystem state: contains 0 or 1 (rw)
- *
- *   raw - raw value taken from embedded controller register (ro)
  *
  * In addition to these platform device attributes the driver
  * registers itself in the Linux backlight control subsystem and is
@@ -174,67 +167,6 @@
 	return ret;
 }
 
-static int set_wlan_state(int state)
-{
-	u8 result, value;
-
-	ec_read(COMPAL_EC_COMMAND_WIRELESS, &result);
-
-	if ((result & KILLSWITCH_MASK) == 0)
-		return -EINVAL;
-	else {
-		if (state)
-			value = (u8) (result | WLAN_MASK);
-		else
-			value = (u8) (result & ~WLAN_MASK);
-		ec_write(COMPAL_EC_COMMAND_WIRELESS, value);
-	}
-
-	return 0;
-}
-
-static int set_bluetooth_state(int state)
-{
-	u8 result, value;
-
-	ec_read(COMPAL_EC_COMMAND_WIRELESS, &result);
-
-	if ((result & KILLSWITCH_MASK) == 0)
-		return -EINVAL;
-	else {
-		if (state)
-			value = (u8) (result | BT_MASK);
-		else
-			value = (u8) (result & ~BT_MASK);
-		ec_write(COMPAL_EC_COMMAND_WIRELESS, value);
-	}
-
-	return 0;
-}
-
-static int get_wireless_state(int *wlan, int *bluetooth)
-{
-	u8 result;
-
-	ec_read(COMPAL_EC_COMMAND_WIRELESS, &result);
-
-	if (wlan) {
-		if ((result & KILLSWITCH_MASK) == 0)
-			*wlan = 0;
-		else
-			*wlan = result & WLAN_MASK;
-	}
-
-	if (bluetooth) {
-		if ((result & KILLSWITCH_MASK) == 0)
-			*bluetooth = 0;
-		else
-			*bluetooth = (result & BT_MASK) >> 1;
-	}
-
-	return 0;
-}
-
 /* Backlight device stuff */
 
 static int bl_get_brightness(struct backlight_device *b)
@@ -255,96 +187,6 @@
 
 static struct backlight_device *compalbl_device;
 
-/* Platform device */
-
-static ssize_t show_wlan(struct device *dev,
-	struct device_attribute *attr, char *buf)
-{
-	int ret, enabled;
-
-	ret = get_wireless_state(&enabled, NULL);
-	if (ret < 0)
-		return ret;
-
-	return sprintf(buf, "%i\n", enabled);
-}
-
-static ssize_t show_raw(struct device *dev,
-	struct device_attribute *attr, char *buf)
-{
-	u8 result;
-
-	ec_read(COMPAL_EC_COMMAND_WIRELESS, &result);
-
-	return sprintf(buf, "%i\n", result);
-}
-
-static ssize_t show_bluetooth(struct device *dev,
-	struct device_attribute *attr, char *buf)
-{
-	int ret, enabled;
-
-	ret = get_wireless_state(NULL, &enabled);
-	if (ret < 0)
-		return ret;
-
-	return sprintf(buf, "%i\n", enabled);
-}
-
-static ssize_t store_wlan_state(struct device *dev,
-	struct device_attribute *attr, const char *buf, size_t count)
-{
-	int state, ret;
-
-	if (sscanf(buf, "%i", &state) != 1 || (state < 0 || state > 1))
-		return -EINVAL;
-
-	ret = set_wlan_state(state);
-	if (ret < 0)
-		return ret;
-
-	return count;
-}
-
-static ssize_t store_bluetooth_state(struct device *dev,
-	struct device_attribute *attr, const char *buf, size_t count)
-{
-	int state, ret;
-
-	if (sscanf(buf, "%i", &state) != 1 || (state < 0 || state > 1))
-		return -EINVAL;
-
-	ret = set_bluetooth_state(state);
-	if (ret < 0)
-		return ret;
-
-	return count;
-}
-
-static DEVICE_ATTR(bluetooth, 0644, show_bluetooth, store_bluetooth_state);
-static DEVICE_ATTR(wlan, 0644, show_wlan, store_wlan_state);
-static DEVICE_ATTR(raw, 0444, show_raw, NULL);
-
-static struct attribute *compal_attributes[] = {
-	&dev_attr_bluetooth.attr,
-	&dev_attr_wlan.attr,
-	&dev_attr_raw.attr,
-	NULL
-};
-
-static struct attribute_group compal_attribute_group = {
-	.attrs = compal_attributes
-};
-
-static struct platform_driver compal_driver = {
-	.driver = {
-		.name = "compal-laptop",
-		.owner = THIS_MODULE,
-	}
-};
-
-static struct platform_device *compal_device;
-
 /* Initialization */
 
 static int dmi_check_cb(const struct dmi_system_id *id)
@@ -454,49 +296,16 @@
 		compalbl_device = backlight_device_register("compal-laptop", NULL, NULL,
 							    &compalbl_ops);
 		if (IS_ERR(compalbl_device))
-			return PTR_ERR(compalbl_device);
+			goto fail_backlight;
 
 		compalbl_device->props.max_brightness = COMPAL_LCD_LEVEL_MAX-1;
 	}
 
-	ret = platform_driver_register(&compal_driver);
-	if (ret)
-		goto fail_backlight;
-
-	/* Register platform stuff */
-
-	compal_device = platform_device_alloc("compal-laptop", -1);
-	if (!compal_device) {
-		ret = -ENOMEM;
-		goto fail_platform_driver;
-	}
-
-	ret = platform_device_add(compal_device);
-	if (ret)
-		goto fail_platform_device1;
-
-	ret = sysfs_create_group(&compal_device->dev.kobj,
-		&compal_attribute_group);
-	if (ret)
-		goto fail_platform_device2;
-
 	printk(KERN_INFO "compal-laptop: driver "COMPAL_DRIVER_VERSION
 		" successfully loaded.\n");
 
 	return 0;
 
-fail_platform_device2:
-
-	platform_device_del(compal_device);
-
-fail_platform_device1:
-
-	platform_device_put(compal_device);
-
-fail_platform_driver:
-
-	platform_driver_unregister(&compal_driver);
-
 fail_backlight:
 
 	backlight_device_unregister(compalbl_device);
@@ -514,9 +323,6 @@
 static void __exit compal_cleanup(void)
 {
 
-	sysfs_remove_group(&compal_device->dev.kobj, &compal_attribute_group);
-	platform_device_unregister(compal_device);
-	platform_driver_unregister(&compal_driver);
 	backlight_device_unregister(compalbl_device);
 	if (wifi_rfkill)
 		rfkill_unregister(wifi_rfkill);

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