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

Neil Armstrong
2026-03-26T08:53:46Z

On 3/25/26 10:15, Ronald Claveau wrote:
> 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 {
>

Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>

Thanks,
Neil