Hi all,
As GPIO hogs are configured at GPIO controller initialization time,
adding/removing GPIO hogs in Device Tree overlays currently does not
work. Hence this patch series adds support for that, by registering an
of_reconfig notifier, as is already done for platform, i2c, and SPI
devices.
Changes compared to v1[1]:
- Drop RFC state,
- Document that modifying existing gpio-hog nodes is not supported.
After I posted v1, Frank created a unittest[2] to demonstrate the
problem, and to verify to my series fixes it (thanks a lot!).
Thanks!
[1] "[PATCH/RFC 0/2] gpio: of: Add DT overlay support for GPIO hogs"
https://lore.kernel.org/r/20191230133852.5890-1-geert+renesas@xxxxxxxxx/
[2] "[RFC PATCH 0/2] of: unittest: add overlay gpio test to catch gpio hog
problem"
https://lore.kernel.org/r/1579070828-18221-1-git-send-email-frowand.list@xxxxxxxxx/
Geert Uytterhoeven (2):
gpio: of: Extract of_gpiochip_add_hog()
gpio: of: Add DT overlay support for GPIO hogs
drivers/gpio/gpiolib-of.c | 139 +++++++++++++++++++++++++++++++++-----
drivers/gpio/gpiolib-of.h | 2 +
drivers/gpio/gpiolib.c | 14 +++-
drivers/gpio/gpiolib.h | 3 +
4 files changed, 139 insertions(+), 19 deletions(-)
--
2.17.1
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
