From: Lin, Meng-Bo Date: Fri, 27 Oct 2023 22:53:59 +0000 (-0700) Subject: dt-bindings: input: cyttsp5: document vddio-supply X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=fade5a92931c241be5b7e185d946205cfdfcb26f;p=linux.git dt-bindings: input: cyttsp5: document vddio-supply The Samsung touchscreen controllers are often used with external pull-up for the interrupt line and the I2C lines, so we might need to enable a regulator to bring the lines into usable state. Otherwise, this might cause spurious interrupts and reading from I2C will fail. Document support for a "vddio-supply" that is enabled by the cyttsp5 driver so that the regulator gets enabled when needed. Signed-off-by: Lin, Meng-Bo Acked-by: Krzysztof Kozlowski Reviewed-by: Alistair Francis Link: https://lore.kernel.org/r/20221117190507.87535-2-linmengbo0689@protonmail.com Signed-off-by: Dmitry Torokhov --- diff --git a/Documentation/devicetree/bindings/input/touchscreen/cypress,tt21000.yaml b/Documentation/devicetree/bindings/input/touchscreen/cypress,tt21000.yaml index 4080422a9eb5c..037e5d3c447f8 100644 --- a/Documentation/devicetree/bindings/input/touchscreen/cypress,tt21000.yaml +++ b/Documentation/devicetree/bindings/input/touchscreen/cypress,tt21000.yaml @@ -34,6 +34,9 @@ properties: vdd-supply: description: Regulator for voltage. + vddio-supply: + description: Optional Regulator for I/O voltage. + reset-gpios: maxItems: 1