linux-kernel - Re: [PATCH 2/2] dt-bindings: mtd: mtk-quadspi: update bindings for mmap flash read

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Message-ID: <20191107010928.GA14186@bogus>
Date:   Wed, 6 Nov 2019 19:09:28 -0600
From:   Rob Herring <robh@...nel.org>
To:     Chuanhong Guo <gch981213@...il.com>
Cc:     linux-mtd@...ts.infradead.org,
        David Woodhouse <dwmw2@...radead.org>,
        Brian Norris <computersforpeace@...il.com>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        Mark Rutland <mark.rutland@....com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Tudor Ambarus <tudor.ambarus@...rochip.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] dt-bindings: mtd: mtk-quadspi: update bindings for
 mmap flash read

On Wed, Nov 06, 2019 at 10:07:48PM +0800, Chuanhong Guo wrote:
> update register descriptions and add an example binding using it.
> 
> Signed-off-by: Chuanhong Guo <gch981213@...il.com>
> ---
>  .../devicetree/bindings/mtd/mtk-quadspi.txt   | 21 ++++++++++++++++++-
>  1 file changed, 20 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/mtd/mtk-quadspi.txt b/Documentation/devicetree/bindings/mtd/mtk-quadspi.txt
> index a12e3b5c495d..4860f6e96f5a 100644
> --- a/Documentation/devicetree/bindings/mtd/mtk-quadspi.txt
> +++ b/Documentation/devicetree/bindings/mtd/mtk-quadspi.txt
> @@ -12,7 +12,10 @@ Required properties:
>  		  "mediatek,mt7623-nor", "mediatek,mt8173-nor"
>  		  "mediatek,mt7629-nor", "mediatek,mt8173-nor"
>  		  "mediatek,mt8173-nor"
> -- reg: 		  physical base address and length of the controller's register
> +- reg: 		  Contains one or two entries, each of which is a tuple consisting of a
> +		  physical address and length. The first entry is the address and length
> +		  of the controller register set. The optional second entry is the address
> +		  and length of the area where the nor flash is mapped to.

All the compatibles support 2 entries? If not, which ones?

>  - 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,
> @@ -48,3 +51,19 @@ nor_flash: spi@...0d000 {
>  	};
>  };
>  
> +nor_flash: spi@...14000 {
> +	compatible = "mediatek,mt7629-nor",
> +		     "mediatek,mt8173-nor";
> +	reg = <0x11014000 0xe0>,
> +	      <0x30000000 0x10000000>;
> +	clocks = <&pericfg CLK_PERI_FLASH_PD>,
> +		 <&topckgen CLK_TOP_FLASH_SEL>;
> +	clock-names = "spi", "sf";
> +	#address-cells = <1>;
> +	#size-cells = <0>;
> +
> +	flash@0 {
> +		compatible = "jedec,spi-nor";
> +		reg = <0>;
> +	};
> +};
> -- 
> 2.21.0
>