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devicetree:bindings: add devicetree bindings for ceva ahci 

adds bindings for CEVA AHCI SATA controller. optional property
broken-gen2 is useful incase of hardware speed limitation.

Signed-off-by: Suneel Garapati <suneel.garapati@xilinx.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Suneel Garapati 2015-06-09 14:23:49 +05:30 committed by Tejun Heo
parent 5163fb6254
commit 03a740fb68
1 changed files with 20 additions and 0 deletions
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Documentation/devicetree/bindings/ata/ahci-ceva.txt Normal file
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Binding for CEVA AHCI SATA Controller
Required properties:
- reg: Physical base address and size of the controller's register area.
- compatible: Compatibility string. Must be 'ceva,ahci-1v84'.
- clocks: Input clock specifier. Refer to common clock bindings.
- interrupts: Interrupt specifier. Refer to interrupt binding.
Optional properties:
- ceva,broken-gen2: limit to gen1 speed instead of gen2.
Examples:
ahci@fd0c0000 {
compatible = "ceva,ahci-1v84";
reg = <0xfd0c0000 0x200>;
interrupt-parent = <&gic>;
interrupts = <0 133 4>;
clocks = <&clkc SATA_CLK_ID>;
ceva,broken-gen2;
};