linux-kernel - [PATCH v4 3/3] Input: atmel_mxt_ts: Document optional voltage regulators

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Message-Id: <20181207142857.15818-4-pawel.mikolaj.chmiel@gmail.com>
Date:   Fri,  7 Dec 2018 15:28:57 +0100
From:   Paweł Chmiel <pawel.mikolaj.chmiel@...il.com>
To:     nick@...anahar.org
Cc:     dmitry.torokhov@...il.com, robh+dt@...nel.org,
        mark.rutland@....com, nicolas.ferre@...rochip.com,
        alexandre.belloni@...tlin.com, linux-input@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org,
        Paweł Chmiel <pawel.mikolaj.chmiel@...il.com>
Subject: [PATCH v4 3/3] Input: atmel_mxt_ts: Document optional voltage regulators

Document new optional voltage regulators, which can be used
to power down/up touchscreen.

Signed-off-by: Paweł Chmiel <pawel.mikolaj.chmiel@...il.com>
Reviewed-by: Rob Herring <robh@...nel.org>
---
Changes from v1:
  - Added reviewed-by
---
 .../devicetree/bindings/input/atmel,maxtouch.txt          | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/input/atmel,maxtouch.txt b/Documentation/devicetree/bindings/input/atmel,maxtouch.txt
index c88919480d37..17930ecadad3 100644
--- a/Documentation/devicetree/bindings/input/atmel,maxtouch.txt
+++ b/Documentation/devicetree/bindings/input/atmel,maxtouch.txt
@@ -31,6 +31,12 @@ Optional properties for main touchpad device:
 
 - reset-gpios: GPIO specifier for the touchscreen's reset pin (active low)
 
+- avdd-supply: Analog power supply. It powers up the analog channel block
+    of the controller to detect the touches.
+
+- vdd-supply: Digital power supply. It powers up the digital block
+    of the controller to enable i2c communication.
+
 Example:
 
 	touch@4b {
@@ -38,4 +44,6 @@ Example:
 		reg = <0x4b>;
 		interrupt-parent = <&gpio>;
 		interrupts = <TEGRA_GPIO(W, 3) IRQ_TYPE_LEVEL_LOW>;
+		avdd-supply = <&atsp_reg>;
+		vdd-supply = <&tsp_reg>;
 	};
-- 
2.17.1