drivers/leds/leds-lp5521.c: add 'name' in the lp5521_led_config

The name of each led channel can be configurable.  For the compatibility,
the name is set to default value(xx:channelN) when 'name' is not defined.
Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Arun MURTHY <arun.murthy@stericsson.com>
Cc: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Documentation/leds/leds-lp5521.txt

@@ -43,17 +43,23 @@ Format: 10x mA i.e 10 means 1.0 mA
 example platform data:
 
 Note: chan_nr can have values between 0 and 2.
+The name of each channel can be configurable.
+If the name field is not defined, the default name will be set to 'xxxx:channelN'
+(XXXX : pdata->label or i2c client name, N : channel number)
 
 static struct lp5521_led_config lp5521_led_config[] = {
         {
+		.name = "red",
                 .chan_nr        = 0,
                 .led_current    = 50,
 		.max_current    = 130,
         }, {
+		.name = "green",
                 .chan_nr        = 1,
                 .led_current    = 0,
 		.max_current    = 130,
         }, {
+		.name = "blue",
                 .chan_nr        = 2,
                 .led_current    = 0,
 		.max_current    = 130,

drivers/leds/leds-lp5521.c

@@ -620,10 +620,15 @@ static int __devinit lp5521_init_led(struct lp5521_led *led,
 		return -EINVAL;
 	}
 
+	led->cdev.brightness_set = lp5521_set_brightness;
+	if (pdata->led_config[chan].name) {
+		led->cdev.name = pdata->led_config[chan].name;
+	} else {
 		snprintf(name, sizeof(name), "%s:channel%d",
 			pdata->label ?: client->name, chan);
-	led->cdev.brightness_set = lp5521_set_brightness;
 		led->cdev.name = name;
+	}
+
 	res = led_classdev_register(dev, &led->cdev);
 	if (res < 0) {
 		dev_err(dev, "couldn't register led on channel %d\n", chan);

include/linux/leds-lp5521.h

@@ -26,6 +26,7 @@
 /* See Documentation/leds/leds-lp5521.txt */
 
 struct lp5521_led_config {
+	char		*name;
 	u8		chan_nr;
 	u8		led_current; /* mA x10, 0 if led is not connected */
 	u8		max_current;