Subject: [PATCH v6 1/3] doc: dt: add documentation for Mediatek spi-nor controller

From: [email-masked] (Brian Norris)
Date: Wed, 11 Nov 2015 12:38:23 -0800

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 <[email-masked]>
> ---

Applied to l2-mtd.git/next (for 4.5). This will show up in
linux-next.git after the merge window.

Also squashed in a small diff (below), to fix up some language issues
and to refer the reader to the jedec,spi-nor.txt document.

>  .../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

The DT binding document shouldn't be talking about software (i.e.,
shouldn't be talking about "drivers").

> +
> +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 at 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 at 0 {
> +		compatible = "jedec,spi-nor";
> +		reg = <0>;
> +	};
> +};
> +

diff --git a/Documentation/devicetree/bindings/mtd/mtk-quadspi.txt b/Documentation/devicetree/bindings/mtd/mtk-quadspi.txt
index 866b492c38d2..fb314f09861b 100644
--- a/Documentation/devicetree/bindings/mtd/mtk-quadspi.txt
+++ b/Documentation/devicetree/bindings/mtd/mtk-quadspi.txt
@@ -1,19 +1,19 @@
-* MTD SPI nor driver for MTK MT81xx (and similar) serial flash controller
+* Serial NOR flash controller for MTK MT81xx (and similar)
 
 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,
+- clocks: 	  the phandle of the clocks needed by the nor controller
+- clock-names: 	  the names of the clocks
+		  the clocks should be named "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.
+The SPI flash must be a child of the nor_flash node and must have a
+compatible property. Also see jedec,spi-nor.txt.
 
 Required properties:
 - compatible:	  May include a device-specific string consisting of the manufacturer