| Message ID | 20221117190507.87535-2-linmengbo0689@protonmail.com |
|---|---|
| State | New |
| Headers | show |
| Series | [1/2] dt-bindings: input: cyttsp5: document vddio-supply | expand |
diff --git a/Documentation/devicetree/bindings/input/touchscreen/cypress,tt21000.yaml b/Documentation/devicetree/bindings/input/touchscreen/cypress,tt21000.yaml index 1959ec394768..869a9bdd962f 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
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 <linmengbo0689@protonmail.com> --- .../devicetree/bindings/input/touchscreen/cypress,tt21000.yaml | 3 +++ 1 file changed, 3 insertions(+)