Re: [PATCH v2 4/5] riscv: dts: thead: Add IO labels for the IO expansion on I2C1

[Drew Fustini <fustini@kernel.org>]

On Tue, Jul 14, 2026 at 03:45:14PM +0800, Icenowy Zheng wrote:
> From: Emil Renner Berthing <emil.renner.berthing@canonical.com>
> 
> Add labels for GPIOs on the IO expansion chip on the I2C1 bus.
> 
> Signed-off-by: Emil Renner Berthing <emil.renner.berthing@canonical.com>
> [Icenowy: Splitted off the patch adding all 3 IO expansions]
> Signed-off-by: Icenowy Zheng <zhengxingda@iscas.ac.cn>
> ---
>  arch/riscv/boot/dts/thead/th1520-lichee-pi-4a.dts | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/arch/riscv/boot/dts/thead/th1520-lichee-pi-4a.dts b/arch/riscv/boot/dts/thead/th1520-lichee-pi-4a.dts
> index 74b120c6b063a..78f5979a56c14 100644
> --- a/arch/riscv/boot/dts/thead/th1520-lichee-pi-4a.dts
> +++ b/arch/riscv/boot/dts/thead/th1520-lichee-pi-4a.dts
> @@ -128,6 +128,14 @@ ioexp2: gpio@18 {
>  		reg = <0x18>;
>  		gpio-controller;
>  		#gpio-cells = <2>;
> +		gpio-line-names = "",
> +				  "cam0_reset",
> +				  "cam1_reset",
> +				  "cam2_reset",
> +				  "wl_host_wake",

I am not sure the line name really matters all that, but it seems that
pin 4 is also used as a reset gpio:

  wifi_pwrseq: wifi-pwrseq {
      compatible = "mmc-pwrseq-simple";
      reset-gpios = <&ioexp2 4 GPIO_ACTIVE_LOW>;
      post-power-on-delay-ms = <200>;
  };       

Did you notice that too?

Thanks,
Drew