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>

diff --git a/Documentation/powerpc/dts-bindings/fsl/board.txt b/Documentation/powerpc/dts-bindings/fsl/board.txt
index 81a917ef96e9afbeb609fd6984f8f0eaa1b316d2..6c974d28eeb404f03c63d3d0b79bfd5a5b00675b 100644 (file)
--- 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;
+               };
+       };