On Fri, Feb 8, 2019 at 2:16 AM Enrico Weigelt, metux IT consult <[email protected]> wrote:
> From: "Enrico Weigelt, metux IT consult" <[email protected]> > > Driver for PCengines APUv2 board that supports GPIOs via AMD PCH > and attached LEDs and keys. > > Cc: [email protected] > Cc: [email protected] > Cc: [email protected] > Cc: [email protected] > Cc: [email protected] > Cc: [email protected] > > Signed-off-by: Enrico Weigelt, metux IT consult <[email protected]> Andy can provide more details on this patch here are some quick remarks: > +#define GPIO_BASE 100 > + > +#define GPIO_LED1 (GPIO_BASE+0) > +#define GPIO_LED2 (GPIO_BASE+1) > +#define GPIO_LED3 (GPIO_BASE+2) > +#define GPIO_MODESW (GPIO_BASE+3) > +#define GPIO_SIMSWAP (GPIO_BASE+4) Instead of hardcoding the GPIO base and offsets like this, use: #include <linux/gpio/machine.h> and define a descriptor table using the name of your gpiochip. There should be examples of other board quirks doing this. I have already patched gpio-leds.c to accept LEDs from descriptor tables, see commit commit 45d4c6de4e497e5b0026c77044ae5fcddf8fecd8 "leds: gpio: Try to lookup gpiod from device" Yours, Linus Walleij
