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authorKim, Milo <Milo.Kim@ti.com>2012-08-22 15:32:29 +0800
committerBryan Wu <bryan.wu@canonical.com>2012-09-11 18:32:41 +0800
commit94b43b677104e50b9f8dd75aacb3c69e16089a68 (patch)
tree991fa64dbabaa3eee5c0dd900a4bbe5ca0c0e3aa
parent127aedc8ecae2628511533ddeb239e99e4bed5e8 (diff)
downloadlinux-linaro-stable-94b43b677104e50b9f8dd75aacb3c69e16089a68.tar.gz
leds-lp5523: add channel name in the platform data
The name of each led channel is configurable. If the name is NULL, just use the channel id for making the channel name Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Bryan Wu <bryan.wu@canonical.com>
-rw-r--r--Documentation/leds/leds-lp5523.txt21
-rw-r--r--drivers/leds/leds-lp5523.c10
-rw-r--r--include/linux/leds-lp5523.h1
3 files changed, 26 insertions, 6 deletions
diff --git a/Documentation/leds/leds-lp5523.txt b/Documentation/leds/leds-lp5523.txt
index fad2feb8b7ce..c2743f59f9ac 100644
--- a/Documentation/leds/leds-lp5523.txt
+++ b/Documentation/leds/leds-lp5523.txt
@@ -10,8 +10,22 @@ Contact: Samu Onkalo (samu.p.onkalo-at-nokia.com)
Description
-----------
LP5523 can drive up to 9 channels. Leds can be controlled directly via
-the led class control interface. Channels have generic names:
-lp5523:channelx where x is 0...8
+the led class control interface.
+The name of each channel is configurable in the platform data - name and label.
+There are three options to make the channel name.
+
+a) Define the 'name' in the platform data
+To make specific channel name, then use 'name' platform data.
+/sys/class/leds/R1 (name: 'R1')
+/sys/class/leds/B1 (name: 'B1')
+
+b) Use the 'label' with no 'name' field
+For one device name with channel number, then use 'label'.
+/sys/class/leds/RGB:channelN (label: 'RGB', N: 0 ~ 8)
+
+c) Default
+If both fields are NULL, 'lp5523' is used by default.
+/sys/class/leds/lp5523:channelN (N: 0 ~ 8)
The chip provides 3 engines. Each engine can control channels without
interaction from the main CPU. Details of the micro engine code can be found
@@ -46,12 +60,13 @@ Note - chan_nr can have values between 0 and 8.
static struct lp5523_led_config lp5523_led_config[] = {
{
+ .name = "D1",
.chan_nr = 0,
.led_current = 50,
.max_current = 130,
},
...
- }, {
+ {
.chan_nr = 8,
.led_current = 50,
.max_current = 130,
diff --git a/drivers/leds/leds-lp5523.c b/drivers/leds/leds-lp5523.c
index fbc12acada95..9fd9a92ed916 100644
--- a/drivers/leds/leds-lp5523.c
+++ b/drivers/leds/leds-lp5523.c
@@ -846,10 +846,14 @@ static int __devinit lp5523_init_led(struct lp5523_led *led, struct device *dev,
return -EINVAL;
}
- snprintf(name, sizeof(name), "%s:channel%d",
- pdata->label ?: "lp5523", chan);
+ if (pdata->led_config[chan].name) {
+ led->cdev.name = pdata->led_config[chan].name;
+ } else {
+ snprintf(name, sizeof(name), "%s:channel%d",
+ pdata->label ?: "lp5523", chan);
+ led->cdev.name = name;
+ }
- led->cdev.name = name;
led->cdev.brightness_set = lp5523_set_brightness;
res = led_classdev_register(dev, &led->cdev);
if (res < 0) {
diff --git a/include/linux/leds-lp5523.h b/include/linux/leds-lp5523.h
index 2694289babd0..727877fb406d 100644
--- a/include/linux/leds-lp5523.h
+++ b/include/linux/leds-lp5523.h
@@ -26,6 +26,7 @@
/* See Documentation/leds/leds-lp5523.txt */
struct lp5523_led_config {
+ const char *name;
u8 chan_nr;
u8 led_current; /* mA x10, 0 if led is not connected */
u8 max_current;