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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>
This commit is contained in:
Anton Vorontsov 2008-12-18 19:37:23 +03:00 committed by Kumar Gala
parent 1b9e89046c
commit 94409d6e10
1 changed files with 31 additions and 1 deletions
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32
Documentation/powerpc/dts-bindings/fsl/board.txt
View File

@ -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;
};
};