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powerpc/85xx: clean up FPGA device tree nodes for Freecsale QorIQ boards

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Standarize and document the FPGA nodes used on Freescale QorIQ reference
boards.  There are different kinds of FPGAs used on the boards, but
only two are currently standard: "pixis", "ngpixis", and "qixis".  Although
there are minor differences among the boards that have one kind of FPGA, most
of the functionality is the same, so it makes sense to create common
compatibility strings.

We also need to update the P1022DS platform file, because the compatible
string for its PIXIS node has changed.  This means that older kernels are
not compatible with newer device trees.  This is not a real problem, however,
since that particular function doesn't work anyway.  When the DIU is active,
the PIXIS is in "indirect mode", and so cannot be accessed as a memory-mapped
device.

Signed-off-by: Timur Tabi <[email protected]>
Signed-off-by: Kumar Gala <[email protected]>
This commit is contained in:
Timur Tabi 2011-09-15 13:04:13 -05:00 • committed by Kumar Gala
commit 499ccb27a8
7 changed files with 42 additions and 22 deletions
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30
Documentation/devicetree/bindings/powerpc/fsl/board.txt
View file

@ -1,3 +1,8 @@
Freescale Reference Board Bindings
This document describes device tree bindings for various devices that
exist on some Freescale reference boards.
* Board Control and Status (BCSR)
Required properties:
@ -12,25 +17,26 @@ Example:
reg = <f8000000 8000>;
};
* Freescale on board FPGA
* Freescale on-board FPGA
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 length of the FPPGA register
set.
- compatible: should be a board-specific string followed by a string
indicating the type of FPGA. Example:
"fsl,<board>-fpga", "fsl,fpga-pixis"
- reg: should contain the address and the length of the FPGA register set.
- interrupt-parent: should specify phandle for the interrupt controller.
- interrupts : should specify event (wakeup) IRQ.
- interrupts: should specify event (wakeup) IRQ.
Example (MPC8610HPCD):
Example (P1022DS):
board-control@e8000000 {
compatible = "fsl,fpga-pixis";
reg = <0xe8000000 32>;
interrupt-parent = <&mpic>;
interrupts = <8 8>;
};
board-control@3,0 {
compatible = "fsl,p1022ds-fpga", "fsl,fpga-ngpixis";
reg = <3 0 0x30>;
interrupt-parent = <&mpic>;
interrupts = <8 8 0 0>;
};
* Freescale BCSR GPIO banks