pinctrl: renesas: gpio: support software nodes for function GPIOs

This patch extends the sh-pfc GPIO driver to support software-node-based
configuration for the secondary 'function' GPIO chip.

While the primary GPIO chip typically uses the firmware node attached to
the parent platform device, the secondary chip should target a specific
child node to avoid ambiguity when defining GPIO hogs or properties.

Update gpio_function_setup() to look for a child node named 'functions',
but only when the parent is a software node. This ensures the behavior
is restricted to legacy platforms being migrated to software nodes.

Assisted-by: Gemini:gemini-3.1-pro
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Reviewed-by: Linus Walleij <linusw@kernel.org>
Signed-off-by: Linus Walleij <linusw@kernel.org>

0 files changed, 0 insertions, 0 deletions