| Message ID | 1526975559-18966-5-git-send-email-eugen.hristev@microchip.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Tue, 22 May 2018 10:52:34 +0300 Eugen Hristev <eugen.hristev@microchip.com> wrote: > Added bindings for generic resistive touchscreen ADC. > > Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com> > Reviewed-by: Rob Herring <robh@kernel.org> Applied, thanks Jonathan > --- > Changes in v5: > - changed property name touchscreen-threshold-pressure to > touchscreen-min-pressure > > Changes in v3: > - renamed file and compatible to exclude "generic" keyword > - removed the pressure threshold property, added it as a common > touchscreen property in the touchscreen common bindings in a separate > commit. > > Changes in v2: > - modified bindings to have a generic resistive touchscreen adc driver > instead of specific architecture one. > > .../input/touchscreen/resistive-adc-touch.txt | 30 ++++++++++++++++++++++ > 1 file changed, 30 insertions(+) > create mode 100644 Documentation/devicetree/bindings/input/touchscreen/resistive-adc-touch.txt > > diff --git a/Documentation/devicetree/bindings/input/touchscreen/resistive-adc-touch.txt b/Documentation/devicetree/bindings/input/touchscreen/resistive-adc-touch.txt > new file mode 100644 > index 0000000..51456c0 > --- /dev/null > +++ b/Documentation/devicetree/bindings/input/touchscreen/resistive-adc-touch.txt > @@ -0,0 +1,30 @@ > +Generic resistive touchscreen ADC > + > +Required properties: > + > + - compatible: must be "resistive-adc-touch" > +The device must be connected to an ADC device that provides channels for > +position measurement and optional pressure. > +Refer to ../iio/iio-bindings.txt for details > + - iio-channels: must have at least two channels connected to an ADC device. > +These should correspond to the channels exposed by the ADC device and should > +have the right index as the ADC device registers them. These channels > +represent the relative position on the "x" and "y" axes. > + - iio-channel-names: must have all the channels' names. Mandatory channels > +are "x" and "y". > + > +Optional properties: > + - iio-channels: The third channel named "pressure" is optional and can be > +used if the ADC device also measures pressure besides position. > +If this channel is missing, pressure will be ignored and the touchscreen > +will only report position. > + - iio-channel-names: optional channel named "pressure". > + > +Example: > + > + resistive_touch: resistive_touch { > + compatible = "resistive-adc-touch"; > + touchscreen-min-pressure = <50000>; > + io-channels = <&adc 24>, <&adc 25>, <&adc 26>; > + io-channel-names = "x", "y", "pressure"; > + };
diff --git a/Documentation/devicetree/bindings/input/touchscreen/resistive-adc-touch.txt b/Documentation/devicetree/bindings/input/touchscreen/resistive-adc-touch.txt new file mode 100644 index 0000000..51456c0 --- /dev/null +++ b/Documentation/devicetree/bindings/input/touchscreen/resistive-adc-touch.txt @@ -0,0 +1,30 @@ +Generic resistive touchscreen ADC + +Required properties: + + - compatible: must be "resistive-adc-touch" +The device must be connected to an ADC device that provides channels for +position measurement and optional pressure. +Refer to ../iio/iio-bindings.txt for details + - iio-channels: must have at least two channels connected to an ADC device. +These should correspond to the channels exposed by the ADC device and should +have the right index as the ADC device registers them. These channels +represent the relative position on the "x" and "y" axes. + - iio-channel-names: must have all the channels' names. Mandatory channels +are "x" and "y". + +Optional properties: + - iio-channels: The third channel named "pressure" is optional and can be +used if the ADC device also measures pressure besides position. +If this channel is missing, pressure will be ignored and the touchscreen +will only report position. + - iio-channel-names: optional channel named "pressure". + +Example: + + resistive_touch: resistive_touch { + compatible = "resistive-adc-touch"; + touchscreen-min-pressure = <50000>; + io-channels = <&adc 24>, <&adc 25>, <&adc 26>; + io-channel-names = "x", "y", "pressure"; + };