dt-bindings: mfd: rockchip,rk805: Convert pinctrl to DT schema

pinctrl-rk805.txt describes the pinmux controller that is part of the
Rockchip RK805 PMIC. The PMIC itself is already described by
rockchip,rk805.yaml, so the pinmux part belongs there as well: the
pinctrl node is a child of the PMIC node, not a separate device.

Fold the pinmux description into rockchip,rk805.yaml and drop the
standalone text binding.

While doing so, add the missing child node schema. The rockchip,rk805.yaml
schema ends with 'additionalProperties: false' but did not describe the pin
configuration child nodes at all, so a valid pinmux node like the one shown
in pinctrl-rk805.txt was rejected:

    pmic@18 (rockchip,rk805): 'rk805-default-pins' does not match any of
    the regexes: '^pinctrl-[0-9]+$'

The pin configuration nodes require 'pins'; without it a node that names
no pin is accepted silently, while the text binding it replaces listed
'pins' as required. The RK805 exposes two output-only GPIOs, so 'pins' is
an enum of gpio0 and gpio1 and a typo such as "gpio2" is caught.

The nodes may be direct children of the PMIC, or sit one level deeper
inside a "pinmux" grouping node, which is the layout the example of the
text binding used. pinctrl-bindings.txt allows the configuration nodes to
be grandchildren of the pin controller, and the driver reaches both
layouts: pinconf_generic_dt_node_to_map() parses the referenced node and
then walks its children. The example shows both.

The example also regains the gpio-controller and #gpio-cells lines that the
example of the text binding had.

Reported-by: Sashiko <sashiko-bot@kernel.org>
Link: https://sashiko.dev/#/patchset/20260923034245.396417-1-quchaosheng000406@163.com?part=1
Link: https://sashiko.dev/#/patchset/20260923062746.516666-1-quchaosheng000406@163.com?part=1
Link: https://sashiko.dev/#/patchset/20260923074337.575122-1-quchaosheng000406@163.com?part=1
Assisted-by: LLM
Signed-off-by: Quchaosheng <quchaosheng000406@163.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20260923083001.606935-1-quchaosheng000406@163.com
Signed-off-by: Lee Jones <lee@kernel.org>

0 files changed, 0 insertions, 0 deletions