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

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Message-ID: <20151109163922.GA13578@rob-hp-laptop>
Date:	Mon, 9 Nov 2015 10:39:22 -0600
From:	Rob Herring <robh@...nel.org>
To:	Bayi Cheng <bayi.cheng@...iatek.com>
Cc:	David Woodhouse <dwmw2@...radead.org>,
	Brian Norris <computersforpeace@...il.com>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Matthias Brugger <matthias.bgg@...il.com>,
	Daniel Kurtz <djkurtz@...omium.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-mtd@...ts.infradead.org, srv_heupstream@...iatek.com,
	jteki@...nedev.com, ezequiel@...guardiasur.com.ar
Subject: Re: [PATCH v6 1/3] doc: dt: add documentation for Mediatek spi-nor
 controller

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@...iatek.com>

Acked-by: Rob Herring <robh@...nel.org>

> ---
>  .../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@...0d000 {
> +	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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