realtek: add mux pinctrl for rtl931x

Add a pinctrl-single node to manage the sys-led mux and JTAG mux.
This allows using the associated pins as GPIOs:
  - sys-led: GPIO0
  - JTAG: GPIO6, GPIO7, others unknown (TDO, TDI, TMS, TCK /TRST)

Suggested-by: Birger Koblitz <mail@birger-koblitz.de>
Signed-off-by: Sander Vanheule <sander@svanheule.net>

diff --git a/target/linux/realtek/dts-5.10/rtl931x.dtsi b/target/linux/realtek/dts-5.10/rtl931x.dtsi
index 29aee1f7b268f156eab3a38ffa8b1fa7a77f8679..a5166141e6fd028f54ecf8f66ab222f82a938725 100644 (file)
--- a/target/linux/realtek/dts-5.10/rtl931x.dtsi
+++ b/target/linux/realtek/dts-5.10/rtl931x.dtsi
@@ -155,6 +155,25 @@
                };
        };
 
+       pinmux: pinmux@1b001358 {
+               compatible = "pinctrl-single";
+               reg = <0x1b001358 0x4>;
+
+               pinctrl-single,bit-per-mux;
+               pinctrl-single,register-width = <32>;
+               pinctrl-single,function-mask = <0x1>;
+               #pinctrl-cells = <2>;
+
+               /* Enable GPIO6 and GPIO7, possibly unknown others */
+               pinmux_disable_jtag: disable_jtag {
+                       pinctrl-single,bits = <0x0 0x0 0x8000>;
+               };
+
+               /* Controls GPIO0 */
+               pinmux_disable_sys_led: disable_sys_led {
+                       pinctrl-single,bits = <0x0 0x0 0x100>;
+               };
+       };
 
        ethernet0: ethernet@1b00a300 {
                status = "okay";