riscv: dts: spacemit: add gpio support for K1 SoC

Populate the GPIO node in the device tree for SpacemiT K1 SoC.
Each of 32 pins will act as one bank and map pins to pinctrl controller.

Link: https://lore.kernel.org/r/20250424-03-k1-gpio-v9-2-eaece8cc5a86@gentoo.org
Signed-off-by: Yixun Lan <dlan@gentoo.org>

diff --git a/arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi b/arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi
index a8eac5517f8578d60cb45214589ccb45ac376b9a..283663647a86ff137917ced8bfe79a129c86342a 100644 (file)
--- a/arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi
+++ b/arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi
@@ -7,6 +7,9 @@
 
 #define K1_PADCONF(pin, func) (((pin) << 16) | (func))
 
+/* Map GPIO pin to each bank's <index, offset> */
+#define K1_GPIO(x)     (x / 32) (x % 32)
+
 &pinctrl {
        uart0_2_cfg: uart0-2-cfg {
                uart0-2-pins {

diff --git a/arch/riscv/boot/dts/spacemit/k1.dtsi b/arch/riscv/boot/dts/spacemit/k1.dtsi
index 2c7aa9b37fee27afe839346b45983fc5070031cf..c0f8c5fca975d73b6ea6886da13fcf55289cb16c 100644 (file)
--- a/arch/riscv/boot/dts/spacemit/k1.dtsi
+++ b/arch/riscv/boot/dts/spacemit/k1.dtsi
@@ -465,6 +465,24 @@
                        status = "disabled";
                };
 
+               gpio: gpio@d4019000 {
+                       compatible = "spacemit,k1-gpio";
+                       reg = <0x0 0xd4019000 0x0 0x100>;
+                       clocks = <&syscon_apbc CLK_GPIO>,
+                                <&syscon_apbc CLK_GPIO_BUS>;
+                       clock-names = "core", "bus";
+                       gpio-controller;
+                       #gpio-cells = <3>;
+                       interrupts = <58>;
+                       interrupt-parent = <&plic>;
+                       interrupt-controller;
+                       #interrupt-cells = <3>;
+                       gpio-ranges = <&pinctrl 0 0 0 32>,
+                                     <&pinctrl 1 0 32 32>,
+                                     <&pinctrl 2 0 64 32>,
+                                     <&pinctrl 3 0 96 32>;
+               };
+
                pinctrl: pinctrl@d401e000 {
                        compatible = "spacemit,k1-pinctrl";
                        reg = <0x0 0xd401e000 0x0 0x400>;