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: [RFC PATCH v1 2/3] dt-bindings: touchscreen: resistive-adc-touch: add support for z1 and z2 channels
Date: Mon, 17 May 2021 14:59:08 +0200 [thread overview]
Message-ID: <20210517125909.12024-3-o.rempel@pengutronix.de> (raw)
In-Reply-To: <20210517125909.12024-1-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>
---
.../bindings/input/touchscreen/resistive-adc-touch.yaml | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/Documentation/devicetree/bindings/input/touchscreen/resistive-adc-touch.yaml b/Documentation/devicetree/bindings/input/touchscreen/resistive-adc-touch.yaml
index 53df21a6589e..538c3b1ef1e1 100644
--- a/Documentation/devicetree/bindings/input/touchscreen/resistive-adc-touch.yaml
+++ b/Documentation/devicetree/bindings/input/touchscreen/resistive-adc-touch.yaml
@@ -43,6 +43,7 @@ properties:
touchscreen-inverted-y: true
touchscreen-swapped-x-y: true
touchscreen-min-pressure: true
+ touchscreen-x-plate-ohms: true
additionalProperties: false
@@ -59,3 +60,11 @@ examples:
io-channels = <&adc 24>, <&adc 25>, <&adc 26>;
io-channel-names = "x", "y", "pressure";
};
+ - |
+ resistive_touch {
+ compatible = "resistive-adc-touch";
+ touchscreen-min-pressure = <50000>;
+ io-channels = <&adc 1>, <&adc 2>, <&adc 3>, <&adc 4>;
+ io-channel-names = "x", "y", "z1", "z2";
+ touchscreen-x-plate-ohms = <800>;
+ };
--
2.29.2
next prev parent reply other threads:[~2021-05-17 12:59 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-17 12:59 [RFC PATCH v1 0/3] add pressure calculation support for resistive-adc-touch driver Oleksij Rempel
2021-05-17 12:59 ` [RFC PATCH v1 1/3] dt-bindings: touchscreen: add touchscreen-x/y-plate-ohms property Oleksij Rempel
2021-05-17 12:59 ` Oleksij Rempel [this message]
2021-05-17 12:59 ` [RFC PATCH v1 3/3] Input: resistive-adc-touch: add support for z1 and z2 channels Oleksij Rempel
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