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| author | Lin, Meng-Bo <linmengbo0689@protonmail.com> | 2023-10-28 00:53:59 +0200 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2023-10-28 01:05:06 +0200 |
| commit | fade5a92931c241be5b7e185d946205cfdfcb26f (patch) | |
| tree | 15d6208abd7cc9a58063098b54ab2a864aeecc50 /Documentation | |
| parent | Input: tegra-kbc - use device_get_match_data() (diff) | |
| download | linux-fade5a92931c241be5b7e185d946205cfdfcb26f.tar.xz linux-fade5a92931c241be5b7e185d946205cfdfcb26f.zip | |
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 <linmengbo0689@protonmail.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Alistair Francis <alistair@alistair23.me>
Link: https://lore.kernel.org/r/20221117190507.87535-2-linmengbo0689@protonmail.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/input/touchscreen/cypress,tt21000.yaml | 3 |
1 files changed, 3 insertions, 0 deletions
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 |