Henning Schild 0cd7777c74 leds: simatic-ipc-leds-gpio: Make sure we have the GPIO providing driver ... [ Upstream commit c64964ebee ] If we register a "leds-gpio" platform device for GPIO pins that do not exist we get a -EPROBE_DEFER and the probe will be tried again later. If there is no driver to provide that pin we will poll forever and also create a lot of log messages. So check if that GPIO driver is configured, if so it will come up eventually. If not, we exit our probe function early and do not even bother registering the "leds-gpio". This method was chosen over "Kconfig depends" since this way we can add support for more devices and GPIO backends more easily without "depends":ing on all GPIO backends. Fixes: a6c80bec3c ("leds: simatic-ipc-leds-gpio: Add GPIO version of Siemens driver") Signed-off-by: Henning Schild <henning.schild@siemens.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Lee Jones <lee@kernel.org> Link: https://lore.kernel.org/r/20221007153323.1326-1-henning.schild@siemens.com Signed-off-by: Sasha Levin <sashal@kernel.org>		2023-03-10 09:33:26 +01:00
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Kconfig	leds: simatic-ipc-leds-gpio: Add GPIO version of Siemens driver	2022-07-14 10:50:43 +01:00
Makefile	leds: simatic-ipc-leds-gpio: Add GPIO version of Siemens driver	2022-07-14 10:50:43 +01:00
simatic-ipc-leds-gpio.c	leds: simatic-ipc-leds-gpio: Make sure we have the GPIO providing driver	2023-03-10 09:33:26 +01:00
simatic-ipc-leds.c	leds: simatic-ipc-leds-gpio: Add GPIO version of Siemens driver	2022-07-14 10:50:43 +01:00