| Message ID | 20220409095129.45786-1-stefan.wahren@i2se.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | gpiolib: of: Introduce hook for missing gpio-ranges | expand |
On Sat, Apr 9, 2022 at 11:52 AM Stefan Wahren <stefan.wahren@i2se.com> wrote: > This patch series tries to provide backward compatibility for DTB which > lacks the gpio-ranges property. > > The commit ("pinctrl: msm: fix gpio-hog related boot issues") by Christian > Lamparter already contains a fallback in case the gpio-ranges property > is missing. But this approach doesn't work on BCM2835 with a gpio-hog > defined for the SoC GPIOs. > > Based Christian's on explanation i conclude that the fallback must happen > during the gpiochip_add() call and not afterwards. So the approach is to > call an optional hook, which can be implemented in the platform driver. > > This series has been tested on Raspberry Pi 3 B Plus. > > Changes since RFC: > - just add all collected Fixes, Reviewed-by, Tested-by and Acked-by Patches applied! Sorry for being a bit slow on this :/ Yours, Linus Walleij
This patch series tries to provide backward compatibility for DTB which lacks the gpio-ranges property. The commit ("pinctrl: msm: fix gpio-hog related boot issues") by Christian Lamparter already contains a fallback in case the gpio-ranges property is missing. But this approach doesn't work on BCM2835 with a gpio-hog defined for the SoC GPIOs. Based Christian's on explanation i conclude that the fallback must happen during the gpiochip_add() call and not afterwards. So the approach is to call an optional hook, which can be implemented in the platform driver. This series has been tested on Raspberry Pi 3 B Plus. Changes since RFC: - just add all collected Fixes, Reviewed-by, Tested-by and Acked-by Stefan Wahren (2): gpiolib: of: Introduce hook for missing gpio-ranges pinctrl: bcm2835: implement hook for missing gpio-ranges drivers/gpio/gpiolib-of.c | 5 +++++ drivers/pinctrl/bcm/pinctrl-bcm2835.c | 18 ++++++++++++++++++ include/linux/gpio/driver.h | 12 ++++++++++++ 3 files changed, 35 insertions(+)