From: Oleksij Rempel <o.rempel@pengutronix.de>
To: Dmitry Torokhov <dmitry.torokhov@gmail.com>,
Rob Herring <robh+dt@kernel.org>,
Jonathan Cameron <Jonathan.Cameron@Huawei.com>
Cc: Oleksij Rempel <o.rempel@pengutronix.de>,
kernel@pengutronix.de, linux-kernel@vger.kernel.org,
linux-input@vger.kernel.org, David Jander <david@protonic.nl>,
devicetree@vger.kernel.org
Subject: [PATCH v4 4/5] dt-bindings: touchscreen: resistive-adc-touch: add support for z1 and z2 channels
Date: Wed, 19 May 2021 11:42:20 +0200 [thread overview]
Message-ID: <20210519094221.27792-5-o.rempel@pengutronix.de> (raw)
In-Reply-To: <20210519094221.27792-1-o.rempel@pengutronix.de>
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(+)
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>;
+ };
--
2.29.2
next prev parent reply other threads:[~2021-05-19 9:42 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-19 9:42 [PATCH v4 0/5] add z1 and z2 channels support for resistive-adc-touch driver Oleksij Rempel
2021-05-19 9:42 ` [PATCH v4 1/5] dt-bindings: touchscreen: validate nodename Oleksij Rempel
2021-05-19 15:29 ` Rob Herring
2021-05-19 9:42 ` [PATCH v4 2/5] dt-bindings: touchscreen: Convert resistive-adc-touch binding to json schema Oleksij Rempel
2021-05-21 1:35 ` Rob Herring
2021-05-19 9:42 ` [PATCH v4 3/5] dt-bindings: touchscreen: add touchscreen-x/y-plate-ohms property Oleksij Rempel
2021-05-21 1:35 ` Rob Herring
2021-05-19 9:42 ` Oleksij Rempel [this message]
2021-05-21 1:36 ` [PATCH v4 4/5] dt-bindings: touchscreen: resistive-adc-touch: add support for z1 and z2 channels Rob Herring
2021-05-19 9:42 ` [PATCH v4 5/5] Input: " Oleksij Rempel
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