dell-led: move driver to drivers/platform/x86/dell-wmi-led.c

The dell-led driver handles a specific WMI GUID present on some Dell
laptops and as such it belongs in the x86 platform driver subsystem.
Source code is moved along with the relevant Kconfig and Makefile
entries, with some minor modifications:

  - Kconfig option is renamed from CONFIG_LEDS_DELL_NETBOOKS to
    CONFIG_DELL_WMI_LED,

  - the X86 Kconfig dependency is removed as the whole
    drivers/platform/x86 menu depends on it, so there is no need to
    duplicate it,

  - the name of the module's source file is removed from the header
    comment to avoid the need to update it in the future.

Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Tested-by: Alex Hung <alex.hung@canonical.com>
Reviewed-by: Pali Rohár <pali.rohar@gmail.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>

3 files changed, 0 insertions, 211 deletions

diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index 8d1b4c9b3bda..6a88474b2970 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -463,14 +463,6 @@ config LEDS_ADP5520
 	  To compile this driver as a module, choose M here: the module will
 	  be called leds-adp5520.
 
-config LEDS_DELL_NETBOOKS
-	tristate "External LED on Dell Business Netbooks"
-	depends on LEDS_CLASS
-	depends on X86 && ACPI_WMI
-	help
-	  This adds support for the Latitude 2100 and similar
-	  notebooks that have an external LED.
-
 config LEDS_MC13783
 	tristate "LED Support for MC13XXX PMIC"
 	depends on LEDS_CLASS
diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
index 6b8273736478..558d24675454 100644
--- a/drivers/leds/Makefile
+++ b/drivers/leds/Makefile
@@ -52,7 +52,6 @@ obj-$(CONFIG_LEDS_REGULATOR)		+= leds-regulator.o
 obj-$(CONFIG_LEDS_INTEL_SS4200)		+= leds-ss4200.o
 obj-$(CONFIG_LEDS_LT3593)		+= leds-lt3593.o
 obj-$(CONFIG_LEDS_ADP5520)		+= leds-adp5520.o
-obj-$(CONFIG_LEDS_DELL_NETBOOKS)	+= dell-led.o
 obj-$(CONFIG_LEDS_MC13783)		+= leds-mc13783.o
 obj-$(CONFIG_LEDS_NS2)			+= leds-ns2.o
 obj-$(CONFIG_LEDS_NETXBIG)		+= leds-netxbig.o
diff --git a/drivers/leds/dell-led.c b/drivers/leds/dell-led.c
deleted file mode 100644
index e5c57389efd6..000000000000
--- a/drivers/leds/dell-led.c
+++ /dev/null
@@ -1,202 +0,0 @@
-/*
- * dell_led.c - Dell LED Driver
- *
- * Copyright (C) 2010 Dell Inc.
- * Louis Davis <louis_davis@dell.com>
- * Jim Dailey <jim_dailey@dell.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- */
-
-#include <linux/acpi.h>
-#include <linux/leds.h>
-#include <linux/slab.h>
-#include <linux/module.h>
-
-MODULE_AUTHOR("Louis Davis/Jim Dailey");
-MODULE_DESCRIPTION("Dell LED Control Driver");
-MODULE_LICENSE("GPL");
-
-#define DELL_LED_BIOS_GUID "F6E4FE6E-909D-47cb-8BAB-C9F6F2F8D396"
-MODULE_ALIAS("wmi:" DELL_LED_BIOS_GUID);
-
-/* Error Result Codes: */
-#define INVALID_DEVICE_ID	250
-#define INVALID_PARAMETER	251
-#define INVALID_BUFFER		252
-#define INTERFACE_ERROR		253
-#define UNSUPPORTED_COMMAND	254
-#define UNSPECIFIED_ERROR	255
-
-/* Device ID */
-#define DEVICE_ID_PANEL_BACK	1
-
-/* LED Commands */
-#define CMD_LED_ON	16
-#define CMD_LED_OFF	17
-#define CMD_LED_BLINK	18
-
-struct bios_args {
-	unsigned char length;
-	unsigned char result_code;
-	unsigned char device_id;
-	unsigned char command;
-	unsigned char on_time;
-	unsigned char off_time;
-};
-
-static int dell_led_perform_fn(u8 length,
-		u8 result_code,
-		u8 device_id,
-		u8 command,
-		u8 on_time,
-		u8 off_time)
-{
-	struct bios_args *bios_return;
-	u8 return_code;
-	union acpi_object *obj;
-	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
-	struct acpi_buffer input;
-	acpi_status status;
-
-	struct bios_args args;
-	args.length = length;
-	args.result_code = result_code;
-	args.device_id = device_id;
-	args.command = command;
-	args.on_time = on_time;
-	args.off_time = off_time;
-
-	input.length = sizeof(struct bios_args);
-	input.pointer = &args;
-
-	status = wmi_evaluate_method(DELL_LED_BIOS_GUID,
-		1,
-		1,
-		&input,
-		&output);
-
-	if (ACPI_FAILURE(status))
-		return status;
-
-	obj = output.pointer;
-
-	if (!obj)
-		return -EINVAL;
-	else if (obj->type != ACPI_TYPE_BUFFER) {
-		kfree(obj);
-		return -EINVAL;
-	}
-
-	bios_return = ((struct bios_args *)obj->buffer.pointer);
-	return_code = bios_return->result_code;
-
-	kfree(obj);
-
-	return return_code;
-}
-
-static int led_on(void)
-{
-	return dell_led_perform_fn(3,	/* Length of command */
-		INTERFACE_ERROR,	/* Init to  INTERFACE_ERROR */
-		DEVICE_ID_PANEL_BACK,	/* Device ID */
-		CMD_LED_ON,		/* Command */
-		0,			/* not used */
-		0);			/* not used */
-}
-
-static int led_off(void)
-{
-	return dell_led_perform_fn(3,	/* Length of command */
-		INTERFACE_ERROR,	/* Init to  INTERFACE_ERROR */
-		DEVICE_ID_PANEL_BACK,	/* Device ID */
-		CMD_LED_OFF,		/* Command */
-		0,			/* not used */
-		0);			/* not used */
-}
-
-static int led_blink(unsigned char on_eighths,
-		unsigned char off_eighths)
-{
-	return dell_led_perform_fn(5,	/* Length of command */
-		INTERFACE_ERROR,	/* Init to  INTERFACE_ERROR */
-		DEVICE_ID_PANEL_BACK,	/* Device ID */
-		CMD_LED_BLINK,		/* Command */
-		on_eighths,		/* blink on in eigths of a second */
-		off_eighths);		/* blink off in eights of a second */
-}
-
-static void dell_led_set(struct led_classdev *led_cdev,
-		enum led_brightness value)
-{
-	if (value == LED_OFF)
-		led_off();
-	else
-		led_on();
-}
-
-static int dell_led_blink(struct led_classdev *led_cdev,
-		unsigned long *delay_on,
-		unsigned long *delay_off)
-{
-	unsigned long on_eighths;
-	unsigned long off_eighths;
-
-	/* The Dell LED delay is based on 125ms intervals.
-	   Need to round up to next interval. */
-
-	on_eighths = (*delay_on + 124) / 125;
-	if (0 == on_eighths)
-		on_eighths = 1;
-	if (on_eighths > 255)
-		on_eighths = 255;
-	*delay_on = on_eighths * 125;
-
-	off_eighths = (*delay_off + 124) / 125;
-	if (0 == off_eighths)
-		off_eighths = 1;
-	if (off_eighths > 255)
-		off_eighths = 255;
-	*delay_off = off_eighths * 125;
-
-	led_blink(on_eighths, off_eighths);
-
-	return 0;
-}
-
-static struct led_classdev dell_led = {
-	.name		= "dell::lid",
-	.brightness	= LED_OFF,
-	.max_brightness = 1,
-	.brightness_set = dell_led_set,
-	.blink_set	= dell_led_blink,
-	.flags		= LED_CORE_SUSPENDRESUME,
-};
-
-static int __init dell_led_init(void)
-{
-	int error = 0;
-
-	if (!wmi_has_guid(DELL_LED_BIOS_GUID))
-		return -ENODEV;
-
-	error = led_off();
-	if (error != 0)
-		return -ENODEV;
-
-	return led_classdev_register(NULL, &dell_led);
-}
-
-static void __exit dell_led_exit(void)
-{
-	led_classdev_unregister(&dell_led);
-
-	led_off();
-}
-
-module_init(dell_led_init);
-module_exit(dell_led_exit);