[Resend] [PATCH] asus-laptop: add Lenovo SL LenovoCare LED support

[Ike Panhc <ike.pan@canonical.com>]

Resend because the email address of signed-off is wrong in prior mail

This patch is to enable the LenovoCare LED support on Lenovo SL laptop. Based
on the found of the control interface by Alexandre Rostovtsev

Turn on the LenovoCare LED:
 (As root privileges) echo 1 > /sys/class/leds/asus\:\:LenovoCare/brightness
Trun off the LenovoCare LED:
 (As root privileges) echo 0 > /sys/class/leds/asus\:\:LenovoCare/brightness

The patch against current checkout of acpi4asus is below.

Signed-off-by: Ike Panhc <ike.pan@canonical.com>
---
 drivers/platform/x86/asus-laptop.c |   21 ++++++++++++++++++---
 1 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/drivers/platform/x86/asus-laptop.c b/drivers/platform/x86/asus-laptop.c
index 3348cc6..f3c52b6 100644
--- a/drivers/platform/x86/asus-laptop.c
+++ b/drivers/platform/x86/asus-laptop.c
@@ -87,6 +87,7 @@
 #define LCD_ON      0x80	/* LCD backlight */
 #define GPS_ON      0x100	/* GPS */
 #define KEY_ON      0x200	/* Keyboard backlight */
+#define LLED_ON     0x400	/* Lenovo SL: LenovoCare LED */
 
 #define ASUS_LOG    ASUS_HOTK_FILE ": "
 #define ASUS_ERR    KERN_ERR    ASUS_LOG
@@ -123,6 +124,7 @@ ASUS_HANDLE(tled_set, ASUS_HOTK_PREFIX "TLED");
 ASUS_HANDLE(rled_set, ASUS_HOTK_PREFIX "RLED");	/* W1JC */
 ASUS_HANDLE(pled_set, ASUS_HOTK_PREFIX "PLED");	/* A7J */
 ASUS_HANDLE(gled_set, ASUS_HOTK_PREFIX "GLED");	/* G1, G2 (probably) */
+ASUS_HANDLE(lled_set, "\\_SB_.PCI0.SBRG.EC0_.HKEY.TVLS"); /* LenovoCare */
 
 /* LEDD */
 ASUS_HANDLE(ledd_set, ASUS_HOTK_PREFIX "SLCM");
@@ -285,6 +287,7 @@ ASUS_LED(rled, "record", 1);
 ASUS_LED(pled, "phone", 1);
 ASUS_LED(gled, "gaming", 1);
 ASUS_LED(kled, "kbd_backlight", 3);
+ASUS_LED(lled, "LenovoCare", 1);
 
 struct key_entry {
 	char type;
@@ -419,6 +422,9 @@ static void write_status(acpi_handle handle, int out, int mask)
 		handle = (out) ? gps_on_handle : gps_off_handle;
 		out = 0x02;
 		break;
+	case LLED_ON:
+		out = (out & 0x1) * 0xFF;
+		break;
 	default:
 		out &= 0x1;
 		break;
@@ -452,6 +458,7 @@ ASUS_LED_HANDLER(pled, PLED_ON);
 ASUS_LED_HANDLER(rled, RLED_ON);
 ASUS_LED_HANDLER(tled, TLED_ON);
 ASUS_LED_HANDLER(gled, GLED_ON);
+ASUS_LED_HANDLER(lled, LLED_ON);
 
 /*
  * Keyboard backlight
@@ -1146,6 +1153,7 @@ static int asus_hotk_get_info(void)
 	ASUS_HANDLE_INIT(rled_set);
 	ASUS_HANDLE_INIT(pled_set);
 	ASUS_HANDLE_INIT(gled_set);
+	ASUS_HANDLE_INIT(lled_set);
 
 	ASUS_HANDLE_INIT(ledd_set);
 
@@ -1338,6 +1346,7 @@ static void asus_led_exit(void)
 	ASUS_LED_UNREGISTER(rled);
 	ASUS_LED_UNREGISTER(gled);
 	ASUS_LED_UNREGISTER(kled);
+	ASUS_LED_UNREGISTER(lled);
 }
 
 static void asus_input_exit(void)
@@ -1417,19 +1426,25 @@ static int asus_led_init(struct device *dev)
 	if (rv)
 		goto out4;
 
+	rv = ASUS_LED_REGISTER(lled, dev);
+	if (rv)
+		goto out5;
+
 	if (kled_set_handle && kled_get_handle)
 		rv = ASUS_LED_REGISTER(kled, dev);
 	if (rv)
-		goto out5;
+		goto out6;
 
 	led_workqueue = create_singlethread_workqueue("led_workqueue");
 	if (!led_workqueue)
-		goto out6;
+		goto out7;
 
 	return 0;
-out6:
+out7:
 	rv = -ENOMEM;
 	ASUS_LED_UNREGISTER(kled);
+out6:
+	ASUS_LED_UNREGISTER(lled);
 out5:
 	ASUS_LED_UNREGISTER(gled);
 out4:
-- 
1.6.3.3