gpio: swnode: remove deprecated lookup mechanism

GPIO software node lookup should rely exclusively on matching the
addresses of the referenced firmware nodes. Commit e5d527be7e69 ("gpio:
swnode: don't use the swnode's name as the key for GPIO lookup") tried to
enforce this but had to be reverted: it broke existing users who abused
the software node mechanism by creating "dummy" software nodes named
after the device they want to get GPIOs from, without ever attaching them
to the actual GPIO devices. Those users relied on GPIOLIB matching the
label of the GPIO controller against the name of the software node rather
than on a real firmware node link.

All such users have now been coverted to using attached software nodes
via the fwnode address lookup path and the kernel documentation has been
updated to recommend it as the correct approach. This allows us to remove
the old behavior.

This will allow us to leverage the upcoming support for fw_devlink for
software nodes in GPIO core.

Reviewed-by: Linus Walleij <linusw@kernel.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Link: https://patch.msgid.link/20260702-gpio-swnode-drop-label-matching-v2-1-0838349eb644@oss.qualcomm.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>

0 files changed, 0 insertions, 0 deletions