| Message ID | 20210519094221.27792-5-o.rempel@pengutronix.de |
|---|---|
| State | Superseded |
| Headers | show |
| Series | add z1 and z2 channels support for resistive-adc-touch driver | expand |
On Wed, 19 May 2021 11:42:20 +0200, Oleksij Rempel wrote: > For pressure calculation based on plates resistance we need some additional > properties: > - z1 and z2 channels with additional measurements between plates > - actual resistance of the touchscreen. Currently we use only > X-resistance. > > Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> > --- > .../input/touchscreen/resistive-adc-touch.yaml | 16 ++++++++++++++++ > 1 file changed, 16 insertions(+) > Reviewed-by: Rob Herring <robh@kernel.org>
diff --git a/Documentation/devicetree/bindings/input/touchscreen/resistive-adc-touch.yaml b/Documentation/devicetree/bindings/input/touchscreen/resistive-adc-touch.yaml index 38b4cbee9429..7fc22a403d48 100644 --- a/Documentation/devicetree/bindings/input/touchscreen/resistive-adc-touch.yaml +++ b/Documentation/devicetree/bindings/input/touchscreen/resistive-adc-touch.yaml @@ -27,6 +27,8 @@ properties: - description: x - description: y - description: pressure (optional) + - description: z1 (optional) + - description: z2 (optional) io-channel-names: oneOf: @@ -37,6 +39,11 @@ properties: - enum: [x, y, pressure] - enum: [x, y, pressure] - enum: [x, y, pressure] + - items: + - enum: [x, y, z1, z2] + - enum: [x, y, z1, z2] + - enum: [x, y, z1, z2] + - enum: [x, y, z1, z2] touchscreen-size-x: true touchscreen-size-y: true @@ -46,6 +53,7 @@ properties: touchscreen-inverted-y: true touchscreen-swapped-x-y: true touchscreen-min-pressure: true + touchscreen-x-plate-ohms: true additionalProperties: false @@ -68,3 +76,11 @@ examples: io-channels = <&adc 24>, <&adc 25>, <&adc 26>; io-channel-names = "y", "pressure", "x"; }; + - | + touchscreen { + compatible = "resistive-adc-touch"; + touchscreen-min-pressure = <50000>; + io-channels = <&adc 1>, <&adc 2>, <&adc 3>, <&adc 4>; + io-channel-names = "x", "z1", "z2", "y"; + touchscreen-x-plate-ohms = <800>; + };
For pressure calculation based on plates resistance we need some additional properties: - z1 and z2 channels with additional measurements between plates - actual resistance of the touchscreen. Currently we use only X-resistance. Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> --- .../input/touchscreen/resistive-adc-touch.yaml | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)