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-rw-r--r--Documentation/admin-guide/kernel-parameters.txt3
-rw-r--r--Documentation/devicetree/bindings/input/hid-over-i2c.txt16
-rw-r--r--Documentation/input/event-codes.txt5
3 files changed, 23 insertions, 1 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 2ba45caabada..0464a41cbf3b 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -4115,6 +4115,9 @@
usbhid.mousepoll=
[USBHID] The interval which mice are to be polled at.
+ usbhid.jspoll=
+ [USBHID] The interval which joysticks are to be polled at.
+
usb-storage.delay_use=
[UMS] The delay in seconds before a new device is
scanned for Logical Units (default 1).
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 {
diff --git a/Documentation/input/event-codes.txt b/Documentation/input/event-codes.txt
index 36ea940e5bb9..575415f4cef0 100644
--- a/Documentation/input/event-codes.txt
+++ b/Documentation/input/event-codes.txt
@@ -301,7 +301,10 @@ them as any other INPUT_PROP_BUTTONPAD device.
INPUT_PROP_ACCELEROMETER
-------------------------
Directional axes on this device (absolute and/or relative x, y, z) represent
-accelerometer data. All other axes retain their meaning. A device must not mix
+accelerometer data. Some devices also report gyroscope data, which devices
+can report through the rotational axes (absolute and/or relative rx, ry, rz).
+
+All other axes retain their meaning. A device must not mix
regular directional axes and accelerometer axes on the same event node.
Guidelines: