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authorDaniel Drake <dsd@laptop.org>2013-06-30 18:37:24 -0700
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2013-06-30 20:09:18 -0700
commitb56ece9a3ac3c9708b8f1cebf4ba24c258d40e52 (patch)
treecfea1bda9f765bf83f1e7d7c8fb9556143c51dd5 /Documentation/devicetree/bindings/serio
parent20c3da9f9fc6cdedca887953bbded72f7f025492 (diff)
downloadlinux-b56ece9a3ac3c9708b8f1cebf4ba24c258d40e52.tar.bz2
Input: add OLPC AP-SP driver
The OLPC XO-1.75 and XO-4 laptops include a PS/2 touchpad and an AT keyboard, yet they do not have a hardware PS/2 controller. Instead, a firmware runs on a dedicated core ("Security Processor", part of the SoC) that acts as a PS/2 controller through bit-banging. Communication between the main cpu (Application Processor) and the Security Processor happens via a standard command mechanism implemented by the SoC. Add a driver for this interface to enable keyboard/mouse input on this platform. Original author: Saadia Baloch Signed-off-by: Daniel Drake <dsd@laptop.org> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'Documentation/devicetree/bindings/serio')
-rw-r--r--Documentation/devicetree/bindings/serio/olpc,ap-sp.txt13
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diff --git a/Documentation/devicetree/bindings/serio/olpc,ap-sp.txt b/Documentation/devicetree/bindings/serio/olpc,ap-sp.txt
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+++ b/Documentation/devicetree/bindings/serio/olpc,ap-sp.txt
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+OLPC AP-SP serio interface
+
+Required properties:
+- compatible : "olpc,ap-sp"
+- reg : base address and length of SoC's WTM registers
+- interrupts : SP-AP interrupt
+
+Example:
+ ap-sp@d4290000 {
+ compatible = "olpc,ap-sp";
+ reg = <0xd4290000 0x1000>;
+ interrupts = <40>;
+ }