linux-kernel - [PATCH 1/4] leds-lp5521: add 'name' in the lp5521_led

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Message-ID: <B567DBAB974C0544994013492B949F8E3812CD3806@EXMAIL03.scwf.nsc.com>
Date:	Sat, 21 Jan 2012 10:09:21 -0800
From:	"Kim, Milo" <Milo.Kim@...com>
To:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"rpurdie@...ys.net" <rpurdie@...ys.net>
Subject: [PATCH 1/4] leds-lp5521: 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.

* kernel patch based on 3.0.1

Signed-off-by: Milo(Woogyom) Kim <milo.kim@...com>
---
 Documentation/leds/leds-lp5521.txt |    6 ++++++
 drivers/leds/leds-lp5521.c         |   11 ++++++++---
 include/linux/leds-lp5521.h        |    1 +
 3 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/Documentation/leds/leds-lp5521.txt b/Documentation/leds/leds-lp5521.txt
index c4d8d15..f48ab75 100644
--- a/Documentation/leds/leds-lp5521.txt
+++ b/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,
diff --git a/drivers/leds/leds-lp5521.c b/drivers/leds/leds-lp5521.c
index cc1dc48..c0e7c10 100644
--- a/drivers/leds/leds-lp5521.c
+++ b/drivers/leds/leds-lp5521.c
@@ -617,10 +617,15 @@ static int __devinit lp5521_init_led(struct lp5521_led *led,
 		return -EINVAL;
 	}
 
-	snprintf(name, sizeof(name), "%s:channel%d",
-			pdata->label ?: client->name, chan);
 	led->cdev.brightness_set = lp5521_set_brightness;
-	led->cdev.name = name;
+	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.name = name;
+	}
+
 	res = led_classdev_register(dev, &led->cdev);
 	if (res < 0) {
 		dev_err(dev, "couldn't register led on channel %d\n", chan);
diff --git a/include/linux/leds-lp5521.h b/include/linux/leds-lp5521.h
index fd548d2..e675b8d 100644
--- a/include/linux/leds-lp5521.h
+++ b/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;
-- 
1.7.4.1

Best Regards,
Milo (Woogyom) Kim
Texas Instruments Incorporated

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