Re: [PATCH v2 3/3] arm64: dts: amlogic: add support for Orbbec Zora P1

[sashiko-bot@kernel.org]

Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
- [High] Pin multiplexing conflict on GPIOX_16 between the Wi-Fi SDIO power sequence reset and the 32.768kHz PWM clock.
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--- Patch [3]: [PATCH v2 3/3] arm64: dts: amlogic: add support for Orbbec Zora P1 ---
commit 4c25c22b59ef54a3b08d02aab848d6f6aa6af1ef
Author: Alberto Robazza <robazzalberto@gmail.com>

arm64: dts: amlogic: add support for Orbbec Zora P1

This commit adds device tree support for the Orbbec Zora P1 board, an A311D
based device. It builds upon the ODROID-N2 device tree, adding specific GPIO
wiring for Wi-Fi and Bluetooth over SDIO and UART_A. It also includes the
board's compatible string and LED configurations.

> diff --git a/arch/arm64/boot/dts/amlogic/meson-g12b-zora-p1.dts b/arch/arm64/boot/dts/amlogic/meson-g12b-zora-p1.dts
> new file mode 100644
> --- /dev/null
> +++ b/arch/arm64/boot/dts/amlogic/meson-g12b-zora-p1.dts
[ ... ]
> +	sdio_pwrseq: sdio-pwrseq {
> +		compatible = "mmc-pwrseq-simple";
> +		reset-gpios = <&gpio GPIOX_16 GPIO_ACTIVE_LOW>;
> +		clocks = <&wifi32k>;
> +		clock-names = "ext_clock";
> +	};
> +
> +	wifi32k: wifi32k {
> +		compatible = "pwm-clock";
> +		#clock-cells = <0>;
> +		clock-frequency = <32768>;
> +		pwms = <&pwm_ef 0 30518 0>;
> +	};
[ ... ]
> +&pwm_ef {
> +	status = "okay";
> +	pinctrl-0 = <&pwm_e_pins>;

[Severity: High]
Will this create a pin multiplexing conflict on GPIOX_16?

The sdio_pwrseq node claims GPIOX_16 as a standard GPIO for the reset-gpios
line. However, the pwm_ef node requests the pwm_e_pins pinctrl group. On the
Amlogic G12B platform, pwm_e_pins maps exactly to GPIOX_16.

Since a single physical pin cannot concurrently output a 32kHz PWM clock signal
and function as a static GPIO reset signal for the Wi-Fi module, will the
pinctrl subsystem fail one of the requests and prevent the Wi-Fi module from
initializing?

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Sashiko AI review · https://sashiko.dev/#/patchset/20260726201647.264108-1-robazzalberto@gmail.com?part=3