On Fri, Nov 06, 2015 at 11:48:07PM +0800, Bayi Cheng wrote:
> Add device tree binding documentation for serial flash with
> Mediatek serial flash controller
>
> Signed-off-by: Bayi Cheng <bayi.cheng@xxxxxxxxxxxx>
Acked-by: Rob Herring <robh@xxxxxxxxxx>
> ---
> .../devicetree/bindings/mtd/mtk-quadspi.txt | 41 ++++++++++++++++++++++
> 1 file changed, 41 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/mtd/mtk-quadspi.txt
>
> diff --git a/Documentation/devicetree/bindings/mtd/mtk-quadspi.txt b/Documentation/devicetree/bindings/mtd/mtk-quadspi.txt
> new file mode 100644
> index 0000000..866b492
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mtd/mtk-quadspi.txt
> @@ -0,0 +1,41 @@
> +* MTD SPI nor driver for MTK MT81xx (and similar) serial flash controller
> +
> +Required properties:
> +- compatible: should be "mediatek,mt8173-nor";
> +- reg: physical base address and length of the controller's register
> +- clocks: the phandle of the clock needed by the nor controller
> +- clock-names: the name of the clocks
> + the clocks needed "spi" and "sf". "spi" is used for spi bus,
> + and "sf" is used for controller, these are the clocks witch
> + hardware needs to enabling nor flash and nor flash controller.
> + See Documentation/devicetree/bindings/clock/clock-bindings.txt for details.
> +- #address-cells: should be <1>
> +- #size-cells: should be <0>
> +
> +The SPI Flash must be a child of the nor_flash node and must have a
> +compatible property.
> +
> +Required properties:
> +- compatible: May include a device-specific string consisting of the manufacturer
> + and name of the chip. Must also include "jedec,spi-nor" for any
> + SPI NOR flash that can be identified by the JEDEC READ ID opcode (0x9F).
> +- reg : Chip-Select number
> +
> +Example:
> +
> +nor_flash: spi@1100d000 {
> + compatible = "mediatek,mt8173-nor";
> + reg = <0 0x1100d000 0 0xe0>;
> + clocks = <&pericfg CLK_PERI_SPI>,
> + <&topckgen CLK_TOP_SPINFI_IFR_SEL>;
> + clock-names = "spi", "sf";
> + #address-cells = <1>;
> + #size-cells = <0>;
> + status = "disabled";
> +
> + flash@0 {
> + compatible = "jedec,spi-nor";
> + reg = <0>;
> + };
> +};
> +
> --
> 1.8.1.1.dirty
>
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