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authorAnton Vorontsov <avorontsov@ru.mvista.com>2008-12-18 19:37:23 +0300
committerKumar Gala <galak@kernel.crashing.org>2008-12-30 20:13:44 +0300
commit94409d6e1088517b6d6c8e669c604cc86d08ac1b (patch)
tree742776bdb3139b49145daa2833f636b607eb45d4 /Documentation/powerpc
parent1b9e89046c31fd39d08742915b6bd72f6c239608 (diff)
downloadlinux-94409d6e1088517b6d6c8e669c604cc86d08ac1b.tar.xz
powerpc: Add device tree bindings for BCSR GPIO banks
The patch adds bindings for BCSR GPIO banks, the bindings are used to describe particular BCSR registers that act as simple GPIO controllers. These GPIO banks might control power switches, SPI chip-selects, LEDs, etc. While at it, also fix "length" spelling error in the PIXIS FPGA bindings. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'Documentation/powerpc')
-rw-r--r--Documentation/powerpc/dts-bindings/fsl/board.txt32
1 files changed, 31 insertions, 1 deletions
diff --git a/Documentation/powerpc/dts-bindings/fsl/board.txt b/Documentation/powerpc/dts-bindings/fsl/board.txt
index 81a917ef96e9..6c974d28eeb4 100644
--- a/Documentation/powerpc/dts-bindings/fsl/board.txt
+++ b/Documentation/powerpc/dts-bindings/fsl/board.txt
@@ -18,7 +18,7 @@ This is the memory-mapped registers for on board FPGA.
Required properities:
- compatible : should be "fsl,fpga-pixis".
-- reg : should contain the address and the lenght of the FPPGA register
+- reg : should contain the address and the length of the FPPGA register
set.
Example (MPC8610HPCD):
@@ -27,3 +27,33 @@ Example (MPC8610HPCD):
compatible = "fsl,fpga-pixis";
reg = <0xe8000000 32>;
};
+
+* Freescale BCSR GPIO banks
+
+Some BCSR registers act as simple GPIO controllers, each such
+register can be represented by the gpio-controller node.
+
+Required properities:
+- compatible : Should be "fsl,<board>-bcsr-gpio".
+- reg : Should contain the address and the length of the GPIO bank
+ register.
+- #gpio-cells : Should be two. The first cell is the pin number and the
+ second cell is used to specify optional paramters (currently unused).
+- gpio-controller : Marks the port as GPIO controller.
+
+Example:
+
+ bcsr@1,0 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "fsl,mpc8360mds-bcsr";
+ reg = <1 0 0x8000>;
+ ranges = <0 1 0 0x8000>;
+
+ bcsr13: gpio-controller@d {
+ #gpio-cells = <2>;
+ compatible = "fsl,mpc8360mds-bcsr-gpio";
+ reg = <0xd 1>;
+ gpio-controller;
+ };
+ };