On Tue, Nov 04, 2014 at 08:47:01PM +0800, Zhou Wang wrote:
> Signed-off-by: Zhou Wang <wangzhou.bry@xxxxxxxxx>
> ---
> .../devicetree/bindings/mtd/hisi504-nand.txt | 40 ++++++++++++++++++++
> 1 file changed, 40 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/mtd/hisi504-nand.txt
>
> diff --git a/Documentation/devicetree/bindings/mtd/hisi504-nand.txt b/Documentation/devicetree/bindings/mtd/hisi504-nand.txt
> new file mode 100644
> index 0000000..c8b3988
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mtd/hisi504-nand.txt
> @@ -0,0 +1,40 @@
> +Hisilicon Hip04 Soc NAND controller DT binding
> +
> +Required properties:
> +- compatible: Should be "hisilicon,504-nfc".
> +- reg: The first contains base physical address and size of
> + NAND controller's registers. The second contains base
> + physical address and size of NAND controller's buffer.
> +- interrupts: Interrupt number for nfc.
> +- nand-bus-width: See nand.txt.
> +- nand-ecc-mode: See nand.txt.
Do you support all modes, or just "hw"? Might be worth noting here.
> +- hisi,nand-ecc-bits: ECC bits type support.
> + <0>: none ecc
> + <1>: Can correct 1bit per 512byte.
> + <6>: Can correct 16bits per 1K byte.
You should re-use the nand-ecc-strength and nand-ecc-step-size
properties here. So you'll support these options:
nand-ecc-strength=0 nand-ecc-step-size=<don't care>
nand-ecc-strength=1 nand-ecc-step-size=512
nand-ecc-strength=16 nand-ecc-step-size=1024
> +- #address-cells: partition address, should be set 1.
> +- #size-cells: partition size, should be set 1.
> +
> +Flash chip may optionally contain additional sub-nodes describing partitions of
> +the address space. See partition.txt for more detail.
> +
> +Example:
> +
> + nand: nand@4020000 {
> + compatible = "hisilicon,504-nfc";
> + reg = <0x4020000 0x10000>, <0x5000000 0x1000>;
> + interrupts = <0 379 4>;
> + nand-bus-width = <8>;
> + nand-ecc-mode = "hw";
> + hisi,nand-ecc-bits = <1>;
> + #address-cells = <1>;
> + #size-cells = <1>;
> +
> + partition@0 {
> + label = "nand_text";
> + reg = <0x00000000 0x00400000>;
> + };
> +
> + ...
> +
> + };
Brian
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