[PATCH v13 5/7] riscv: dts: spacemit: enable the i2c8 adapter

Alex Elder
2025-08-25T17:21:12Z

Define properties for the I2C adapter that provides access to the
SpacemiT P1 PMIC. Enable this adapter on the Banana Pi BPI-F3.

Signed-off-by: Alex Elder <elder@riscstar.com>
---
arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts | 12 ++++++++++++
arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi | 7 +++++++
arch/riscv/boot/dts/spacemit/k1.dtsi | 13 +++++++++++++
3 files changed, 32 insertions(+)

diff --git a/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts b/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
index fe22c747c5012..ae9409fe398b2 100644
--- a/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
@@ -40,6 +40,18 @@ &emmc {
status = "okay";
};

+&i2c8 {
+ pinctrl-0 = <&i2c8_cfg>;
+ pinctrl-names = "default";
+ status = "okay";
+
+ pmic@41 {
+ compatible = "spacemit,p1";
+ reg = <0x41>;
+ interrupts = <64>;
+ };
+};
+
&uart0 {
pinctrl-names = "default";
pinctrl-0 = <&uart0_2_cfg>;
diff --git a/arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi b/arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi
index 3810557374228..96d7a46d4bf77 100644
--- a/arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi
+++ b/arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi
@@ -11,6 +11,13 @@
#define K1_GPIO(x) (x / 32) (x % 32)

&pinctrl {
+ i2c8_cfg: i2c8-cfg {
+ i2c8-0-pins {
+ pinmux = <K1_PADCONF(93, 0)>, /* PWR_SCL */
+ <K1_PADCONF(94, 0)>; /* PWR_SDA */
+ };
+ };
+
uart0_2_cfg: uart0-2-cfg {
uart0-2-pins {
pinmux = <K1_PADCONF(68, 2)>,
diff --git a/arch/riscv/boot/dts/spacemit/k1.dtsi b/arch/riscv/boot/dts/spacemit/k1.dtsi
index 6c68b2e54675e..cd9b91c3358e4 100644
--- a/arch/riscv/boot/dts/spacemit/k1.dtsi
+++ b/arch/riscv/boot/dts/spacemit/k1.dtsi
@@ -459,6 +459,19 @@ pwm7: pwm@d401bc00 {
status = "disabled";
};

+ i2c8: i2c@d401d800 {
+ compatible = "spacemit,k1-i2c";
+ reg = <0x0 0xd401d800 0x0 0x38>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ clocks = <&syscon_apbc CLK_TWSI8>,
+ <&syscon_apbc CLK_TWSI8_BUS>;
+ clock-names = "func", "bus";
+ clock-frequency = <400000>;
+ interrupts = <19>;
+ status = "disabled";
+ };
+
pinctrl: pinctrl@d401e000 {
compatible = "spacemit,k1-pinctrl";
reg = <0x0 0xd401e000 0x0 0x400>;
--
2.48.1