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| author |   Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2018-07-02 22:05:22 +0200 |
|---|---|---|
| committer |   Jacek Anaszewski <jacek.anaszewski@gmail.com> | 2018-07-05 23:21:10 +0200 |
| commit | a7e7a3156300a7e1982b03cc9cb8fb0c86434c49 (patch) | |
| tree | f3354f80cf210ac750589fecb7a838fc5803d0ec /include/linux/leds.h | |
| parent | leds: triggers: let struct led_trigger::activate() return an error code (diff) | |
| download | linux-dev-a7e7a3156300a7e1982b03cc9cb8fb0c86434c49.tar.xz linux-dev-a7e7a3156300a7e1982b03cc9cb8fb0c86434c49.zip | |
leds: triggers: add device attribute support
As many triggers use device attributes, add support for these in
led_trigger_set which allows simplifying the drivers accordingly.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Diffstat (limited to 'include/linux/leds.h')
| -rw-r--r-- | include/linux/leds.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/leds.h b/include/linux/leds.h index ba5baaaa43bf..33484a5c7478 100644 --- a/include/linux/leds.h +++ b/include/linux/leds.h @@ -262,8 +262,19 @@ struct led_trigger { /* Link to next registered trigger */ struct list_head next_trig; + + const struct attribute_group **groups; }; +/* + * Currently the attributes in struct led_trigger::groups are added directly to + * the LED device. As this might change in the future, the following + * macros abstract getting the LED device and its trigger_data from the dev + * parameter passed to the attribute accessor functions. + */ +#define led_trigger_get_led(dev) ((struct led_classdev *)dev_get_drvdata((dev))) +#define led_trigger_get_drvdata(dev) (led_get_trigger_data(led_trigger_get_led(dev))) + ssize_t led_trigger_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count); ssize_t led_trigger_show(struct device *dev, struct device_attribute *attr, |