mbox series

[v2,0/2] gpio: of: Add DT overlay support for GPIO hogs

Message ID 20200220130149.26283-1-geert+renesas@glider.be
Headers show
Series gpio: of: Add DT overlay support for GPIO hogs | expand

Message

Geert Uytterhoeven Feb. 20, 2020, 1:01 p.m. UTC 
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@glider.be/
[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@gmail.com/

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(-)