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authorCaesar Wang <wxt@rock-chips.com>2017-02-09 18:03:56 -0800
committerJiri Kosina <jkosina@suse.cz>2017-03-06 13:48:44 +0100
commitcb5cfd91a7ae5ae355e657e5ce4931836b7665eb (patch)
treede926ac001ac7c3e1af51b45609926fd74515654 /Documentation/devicetree/bindings/input
parent81bbef23db51c0b450d90607fbbc2ad80ee0d43f (diff)
devicetree: i2c-hid: Add regulator support
Document a "vdd-supply" and an initialization delay. Can be used for powering on/off a HID. Signed-off-by: Caesar Wang <wxt@rock-chips.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: Jiri Kosina <jikos@kernel.org> Cc: linux-input@vger.kernel.org Signed-off-by: Brian Norris <briannorris@chromium.org> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'Documentation/devicetree/bindings/input')
-rw-r--r--Documentation/devicetree/bindings/input/hid-over-i2c.txt16
1 files changed, 16 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/input/hid-over-i2c.txt b/Documentation/devicetree/bindings/input/hid-over-i2c.txt
index 488edcb264c4..28e8bd8b7d64 100644
--- a/Documentation/devicetree/bindings/input/hid-over-i2c.txt
+++ b/Documentation/devicetree/bindings/input/hid-over-i2c.txt
@@ -17,6 +17,22 @@ Required properties:
- interrupt-parent: the phandle for the interrupt controller
- interrupts: interrupt line
+Additional optional properties:
+
+Some devices may support additional optional properties to help with, e.g.,
+power sequencing. The following properties can be supported by one or more
+device-specific compatible properties, which should be used in addition to the
+"hid-over-i2c" string.
+
+- compatible:
+ * "wacom,w9013" (Wacom W9013 digitizer). Supports:
+ - vdd-supply
+ - post-power-on-delay-ms
+
+- vdd-supply: phandle of the regulator that provides the supply voltage.
+- post-power-on-delay-ms: time required by the device after enabling its regulators
+ before it is ready for communication. Must be used with 'vdd-supply'.
+
Example:
i2c-hid-dev@2c {