On 10/10/2024 15:29, Andreas Kemnade wrote:
> Set them to the state seen in a running system, initialized
> by vendor u-boot or kernel. Add line names where they are defined in the
> vendor kernel.
> gpio15 resets something in the display, otherwise meaning of the
> gpios is not known.
>
> Signed-off-by: Andreas Kemnade <andreas@xxxxxxxxxxxx>
> ---
> .../boot/dts/ti/omap/omap4-epson-embt2ws.dts | 92 +++++++++++++++++++
> 1 file changed, 92 insertions(+)
>
> diff --git a/arch/arm/boot/dts/ti/omap/omap4-epson-embt2ws.dts b/arch/arm/boot/dts/ti/omap/omap4-epson-embt2ws.dts
> index 7684868a2eed..983a21d95db3 100644
> --- a/arch/arm/boot/dts/ti/omap/omap4-epson-embt2ws.dts
> +++ b/arch/arm/boot/dts/ti/omap/omap4-epson-embt2ws.dts
> @@ -115,6 +115,73 @@ wl12xx_vmmc: wl12xx-vmmc {
> };
> };
>
> +&gpio1 {
> + pinctrl-names = "default";
> + pinctrl-0 = <&gpio1_hog_pins &gpio1wk_hog_pins>;
> +
> + lb-reset-hog {
> + gpio-hog;
> + gpios = <9 GPIO_ACTIVE_HIGH>;
> + output-low;
> + line-name = "lb_reset";
> + };
> +
> + power-en-hog {
> + gpio-hog;
> + gpios = <10 GPIO_ACTIVE_HIGH>;
> + output-high;
> + line-name = "power_en";
> + };
As GPIO 9 and 10 come form the Wake-up domain, my guess is
they are used as wake-up input source. Reset button / Power off/wake button?
