On Mon, May 14, 2007 at 12:16:22AM +0100, Richard Purdie wrote:
> On Wed, 2007-05-09 at 20:03 +0400, Anton Vorontsov wrote:
> > Following patch sitting for a long time in our handhelds.org tree.
> >
> > kogiidena, I'm almost sure you'll find it useful, just apply patch,
> > and implement .is_led_supported function for your trigger, which will
> > eliminate trigger showing in
> > /sys/class/leds/LED_WHICH_NOT_SUPPORTS_CUSTOM_TRIGGER/triggers
>
> I like the approach and will apply something like this.
Splendid!
> Comments
> follow..
...
> Missing newline.
...
> ditto.
Thanks, fixed.
> Thanks,
>
> Richard
From: Anton Vorontsov <[email protected]>
Date: Mon, 14 May 2007 23:39:30 +0400
Subject: [PATCH] Custom triggers support, which are might not supported by all LEDs
Signed-off-by: Anton Vorontsov <[email protected]>
---
drivers/leds/led-triggers.c | 11 ++++++++++-
include/linux/leds.h | 1 +
2 files changed, 11 insertions(+), 1 deletions(-)
diff --git a/drivers/leds/led-triggers.c b/drivers/leds/led-triggers.c
index 454fb09..7fde7d0 100644
--- a/drivers/leds/led-triggers.c
+++ b/drivers/leds/led-triggers.c
@@ -53,6 +53,10 @@ ssize_t led_trigger_store(struct class_device *dev, const char *buf,
read_lock(&triggers_list_lock);
list_for_each_entry(trig, &trigger_list, next_trig) {
if (!strcmp(trigger_name, trig->name)) {
+ if (trig->is_led_supported &&
+ !trig->is_led_supported(led_cdev))
+ break;
+
write_lock(&led_cdev->trigger_lock);
led_trigger_set(led_cdev, trig);
write_unlock(&led_cdev->trigger_lock);
@@ -85,6 +89,9 @@ ssize_t led_trigger_show(struct class_device *dev, char *buf)
if (led_cdev->trigger && !strcmp(led_cdev->trigger->name,
trig->name))
len += sprintf(buf+len, "[%s] ", trig->name);
+ else if (trig->is_led_supported &&
+ !trig->is_led_supported(led_cdev))
+ continue;
else
len += sprintf(buf+len, "%s ", trig->name);
}
@@ -171,7 +178,9 @@ int led_trigger_register(struct led_trigger *trigger)
list_for_each_entry(led_cdev, &leds_list, node) {
write_lock(&led_cdev->trigger_lock);
if (!led_cdev->trigger && led_cdev->default_trigger &&
- !strcmp(led_cdev->default_trigger, trigger->name))
+ !strcmp(led_cdev->default_trigger, trigger->name) &&
+ (!trigger->is_led_supported ||
+ trigger->is_led_supported(led_cdev)))
led_trigger_set(led_cdev, trigger);
write_unlock(&led_cdev->trigger_lock);
}
diff --git a/include/linux/leds.h b/include/linux/leds.h
index 88afcef..71175f6 100644
--- a/include/linux/leds.h
+++ b/include/linux/leds.h
@@ -70,6 +70,7 @@ struct led_trigger {
const char *name;
void (*activate)(struct led_classdev *led_cdev);
void (*deactivate)(struct led_classdev *led_cdev);
+ int (*is_led_supported)(struct led_classdev *led_cdev);
/* LEDs under control by this trigger (for simple triggers) */
rwlock_t leddev_list_lock;
--
1.5.1.1-dirty
-
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