From fade5a92931c241be5b7e185d946205cfdfcb26f Mon Sep 17 00:00:00 2001 From: "Lin, Meng-Bo" Date: Fri, 27 Oct 2023 15:53:59 -0700 Subject: [PATCH] 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 --- .../devicetree/bindings/input/touchscreen/cypress,tt21000.yaml | 3 +++ 1 file changed, 3 insertions(+) diff --git a/Documentation/devicetree/bindings/input/touchscreen/cypress,tt21000.yaml b/Documentation/devicetree/bindings/input/touchscreen/cypress,tt21000.yaml index 4080422a9eb5..037e5d3c447f 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