tree f7f9d5ec26bd3e69366c6c5a3f14bdb1da30bda6
parent 4355157147fa0bd08b7c3ae15c6fc01f43f0ecb1
author Manikandan Muralidharan <manikandan.m@microchip.com> 1739170301 +0530
committer Eugen Hristev <eugen.hristev@linaro.org> 1739349116 +0200

pinctrl: at91: Bind GPIO driver to the pinctrl DT node

In Linux DT,the pinctrl node acts as parent nodes with all other
gpio banks as child nodes and a single driver in Linux handles both
pinctrl settings and gpio requests.Current U-Boot DT maintains both
pinctrl and gpio nodes as separate nodes and offers two different class
of U-Boot drivers: UCLASS_PINCTRL which handles pin functions and
UCLASS_GPIO which handles gpio requests. In order to align the DT
of U-Boot with the DT of Linux, a hook is been added in the pinctrl
driver to bind the gpio driver with the pinctrl driver so that
when adding gpio nodes as subnodes to pinctrl node (as per the Linux ABI),
the corresponding APIs will be redirected and handled by valid
drivers attached to the pinctrl driver.

Signed-off-by: Manikandan Muralidharan <manikandan.m@microchip.com>