leds: timer trigger: simplifications from core changes
The trigger core learned error handling for the activate callback and can handle device attributes now. This allows simplifying the driver considerably. Note that .deactivate() is only called when .activate() succeeded, so the check for .trigger_data being non-NULL can go away. 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>
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