On Tue, Sep 29, 2026 at 06:42:20PM +0530, Arpit Saini wrote:
> Some boards drive the ILI7807S panel's backlight from an external
> WLED driver whose enable input is wired to a GPIO, typically modeled
> as a fixed regulator (e.g. vreg_wled).
You describe something else. What's fixed regulator should not matter
here. Which pin is it in ILI7807S?
It seems you just want to represent GPIO with a regulator. This is just
confusing and typical downstream workaround.
>
> Document the optional wled-supply property for the ILI7807S panel
> binding. When present, the supply can be used to control the enable
> input of the external WLED driver.
>
> Platforms without an external WLED enable supply can omit this
> property and continue to use the existing backlight handling.
>
> Fixes: 447a76a99e24 ("dt-bindings: display: panel: add Ilitek ILI7807S panel
> controller")
> Signed-off-by: Arpit Saini <[email protected]>
> ---
> .../devicetree/bindings/display/panel/ilitek,ili7807s.yaml | 12
> ++++++++++++
> 1 file changed, 12 insertions(+)
>
> diff --git
> a/Documentation/devicetree/bindings/display/panel/ilitek,ili7807s.yaml
> b/Documentation/devicetree/bindings/display/panel/ilitek,ili7807s.yaml
> index ba8c5bbf8ffc..8d56b74a962a 100644
> --- a/Documentation/devicetree/bindings/display/panel/ilitek,ili7807s.yaml
> +++ b/Documentation/devicetree/bindings/display/panel/ilitek,ili7807s.yaml
> @@ -34,6 +34,10 @@ properties:
> description: Negative LCD bias supply (AVEE), typically -5.5V
> (range -6.3V to -4.5V)
>
> + wled-supply:
> + description: Optional Supply for the WLED driver that provides the
> + panel backlight
> +
> required:
> - compatible
> - reg
> @@ -49,6 +53,13 @@ examples:
> - |
> #include <dt-bindings/gpio/gpio.h>
>
> + vreg_wled: regulator-wled {
> + compatible = "regulator-fixed";
> + regulator-name = "vreg_wled";
> + gpio = <&tlmm 91 GPIO_ACTIVE_HIGH>;
> + enable-active-high;
> + };
Irrelevant here
Best regards,
Krzysztof
