[PATCH v4 7/9] arm64: dts: amlogic: t7: khadas-vim4: Add SDIO power sequence and WiFi clock

Ronald Claveau
2026-03-25T09:18:53Z

Add the SDIO power sequence node using mmc-pwrseq-simple and a
32.768kHz PWM-based clock required by the Wi-Fi module.

Signed-off-by: Ronald Claveau <linux-kernel-dev@aliel.fr>
---
.../dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts b/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts
index 2450084d37642..770f06b0b16c7 100644
--- a/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts
+++ b/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts
@@ -67,6 +67,15 @@ sd_3v3: regulator-sdcard-3v3 {
regulator-always-on;
};

+ sdio_pwrseq: sdio-pwrseq {
+ compatible = "mmc-pwrseq-simple";
+ reset-gpios = <&gpio GPIOX_6 GPIO_ACTIVE_LOW>;
+ post-power-on-delay-ms = <500>;
+ power-off-delay-us = <200000>;
+ clocks = <&wifi32k>;
+ clock-names = "ext_clock";
+ };
+
vcc5v: regulator-vcc-5v {
compatible = "regulator-fixed";
regulator-name = "VCC5V";
@@ -135,6 +144,19 @@ vddio_c: regulator-gpio-c {
states = <1800000 1
3300000 0>;
};
+
+ wifi32k: wifi32k {
+ compatible = "pwm-clock";
+ #clock-cells = <0>;
+ clock-frequency = <32768>;
+ pwms = <&pwm_ab 0 30518 0>;
+ };
+};
+
+&pwm_ab {
+ status = "okay";
+ pinctrl-0 = <&pwm_a_pins>;
+ pinctrl-names = "default";
};

&uart_a {

--
2.49.0