linux-kernel - [PATCH 1/2] devicetree: i2c-hid: Add regulator support

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Message-Id: <1480717140-14558-1-git-send-email-briannorris@chromium.org>
Date:   Fri,  2 Dec 2016 14:18:59 -0800
From:   Brian Norris <briannorris@...omium.org>
To:     Jiri Kosina <jikos@...nel.org>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>
Cc:     Caesar Wang <wxt@...k-chips.com>,
        linux-rockchip@...ts.infradead.org,
        Rob Herring <robh+dt@...nel.org>, linux-input@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Mark Rutland <mark.rutland@....com>,
        Doug Anderson <dianders@...omium.org>,
        Brian Norris <briannorris@...omium.org>
Subject: [PATCH 1/2] devicetree: i2c-hid: Add regulator support

From: Caesar Wang <wxt@...k-chips.com>

Document a "vdd-supply" and an initialization delay. Can be used for
powering on/off a HID.

Signed-off-by: Caesar Wang <wxt@...k-chips.com>
Cc: Rob Herring <robh+dt@...nel.org>
Cc: Jiri Kosina <jikos@...nel.org>
Cc: linux-input@...r.kernel.org
Signed-off-by: Brian Norris <briannorris@...omium.org>
---
v2:
 * add compatible property for wacom, per Rob's request
 * name the regulator property specifically (VDD)

v3:
 * remove wacom property, per Benjamin's request
 * add delay property

v4: no change
---
 Documentation/devicetree/bindings/input/hid-over-i2c.txt | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/input/hid-over-i2c.txt b/Documentation/devicetree/bindings/input/hid-over-i2c.txt
index 488edcb264c4..1ea290167652 100644
--- a/Documentation/devicetree/bindings/input/hid-over-i2c.txt
+++ b/Documentation/devicetree/bindings/input/hid-over-i2c.txt
@@ -17,6 +17,11 @@ Required properties:
 - interrupt-parent: the phandle for the interrupt controller
 - interrupts: interrupt line
 
+Optional properties:
+- vdd-supply: phandle of the regulator that provides the supply voltage.
+- init-delay-ms: time required by the device after power-on before it is ready
+  for communication.
+
 Example:
 
 	i2c-hid-dev@2c {
-- 
2.8.0.rc3.226.g39d4020