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2018-10-11leds: sc27xx: Add pattern_set/clear interfaces for LED controllerBaolin Wang2-0/+143
This patch implements the 'pattern_set'and 'pattern_clear' interfaces to support SC27XX LED breathing mode. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Acked-by: Pavel Machek <pavel@ucw.c> Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
2018-10-11leds: core: Introduce LED pattern triggerBaolin Wang5-0/+516
This patch adds a new LED trigger that LED device can configure to employ software or hardware pattern engine. Consumers can write 'pattern' file to enable the software pattern which alters the brightness for the specified duration with one software timer. Moreover consumers can write 'hw_pattern' file to enable the hardware pattern for some LED controllers which can autonomously control brightness over time, according to some preprogrammed hardware patterns. Signed-off-by: Raphael Teysseyre <rteysseyre@gmail.com> Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
2018-09-10leds: add Panasonic AN30259A supportSimon Shields3-0/+379
AN30259A is a 3-channel LED driver which uses I2C. It supports timed operation via an internal PWM clock, and variable brightness. This driver offers support for basic hardware-based blinking and brightness control. The datasheet is freely available: https://www.alliedelec.com/m/d/a9d2b3ee87c2d1a535a41dd747b1c247.pdf Signed-off-by: Simon Shields <simon@lineageos.org> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>