diff options
| author | Stephan Gerhold <stephan@gerhold.net> | 2020-12-09 19:37:46 -0800 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2020-12-09 19:47:10 -0800 |
| commit | 3e730ec11d51283ad62a98436967c01b718132ab (patch) | |
| tree | 7796c4fc3d6d41b87e29f1293cfc6d0da2e63c69 | |
| parent | 31a10f5b4b9ff323668c37173695ea463fc89863 (diff) | |
dt-bindings: input: tm2-touchkey: document vddio-supply
The Samsung touchkey 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 tm2-touchkey
driver so that the regulator gets enabled when needed.
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20201203131242.44397-2-stephan@gerhold.net
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
| -rw-r--r-- | Documentation/devicetree/bindings/input/cypress,tm2-touchkey.yaml | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/input/cypress,tm2-touchkey.yaml b/Documentation/devicetree/bindings/input/cypress,tm2-touchkey.yaml index 90d4def83182..52dca8b64081 100644 --- a/Documentation/devicetree/bindings/input/cypress,tm2-touchkey.yaml +++ b/Documentation/devicetree/bindings/input/cypress,tm2-touchkey.yaml @@ -37,6 +37,11 @@ properties: vcc-supply: description: Optional regulator for MCU, 1.8V-3.3V (depending on MCU). + vddio-supply: + description: | + Optional regulator that provides digital I/O voltage, + e.g. for pulling up the interrupt line or the I2C pins. + linux,keycodes: minItems: 1 maxItems: 4 |