linux-kernel - Re: [PATCH v3 4/5] dt-bindings: mtd: Add bindings for TI's AM654 HyperBus memory controller

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Date:   Sun, 14 Apr 2019 20:55:53 +0300
From:   Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:     Vignesh Raghavendra <vigneshr@...com>,
        David Woodhouse <dwmw2@...radead.org>,
        Brian Norris <computersforpeace@...il.com>,
        Boris Brezillon <bbrezillon@...nel.org>,
        Marek Vasut <marek.vasut@...il.com>,
        Richard Weinberger <richard@....at>,
        Rob Herring <robh+dt@...nel.org>
Cc:     linux-mtd@...ts.infradead.org,
        Tudor Ambarus <Tudor.Ambarus@...rochip.com>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Joakim Tjernlund <Joakim.Tjernlund@...inera.com>,
        devicetree@...r.kernel.org, Mason Yang <masonccyang@...c.com.tw>,
        linux-arm-kernel@...ts.infradead.org, nsekhar@...com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 4/5] dt-bindings: mtd: Add bindings for TI's AM654
 HyperBus memory controller

On 04/12/2019 12:29 PM, Vignesh Raghavendra wrote:

> Add binding documentation for TI's HyperBus memory controller present on
> AM654 SoC.
> 
> Signed-off-by: Vignesh Raghavendra <vigneshr@...com>
> ---
>  .../devicetree/bindings/mtd/ti,am654-hbmc.txt | 31 +++++++++++++++++++
>  MAINTAINERS                                   |  1 +
>  2 files changed, 32 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mtd/ti,am654-hbmc.txt
> 
> diff --git a/Documentation/devicetree/bindings/mtd/ti,am654-hbmc.txt b/Documentation/devicetree/bindings/mtd/ti,am654-hbmc.txt
> new file mode 100644
> index 000000000000..00888482df25
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mtd/ti,am654-hbmc.txt
> @@ -0,0 +1,31 @@
[...]
> +Optional properties:
> +- mux-controls: phandle to the multiplexer that controls selection of
> +		HBMC vs OSPI. Mux state of 1 indicates HBMC is selected.

   I thought this is usually done with the help of drivers/pinctrl/..

> +
> +Example:
> +	hbmc: hbmc@...34000 {
> +		compatible = "ti,am654-hbmc";
> +		reg = <0x0 0x47034000 0x0 0x100>,
> +			<0x5 0x00000000 0x1 0x0000000>;
> +		power-domains = <&k3_pds 55>;
> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +		ranges = <0x0 0x5 0x00000000 0x4000000>, /* CS0 - 64MB */
> +			 <0x1 0x5 0x04000000 0x4000000>; /* CS1 - 64MB
> +
> +		/* Slave flash node */
> +		flash@0{

   Need space before {.

> +			compatible = "cypress,hyperflash";
> +			reg = <0x0 0x4000000>;
> +		};
> +	};
[...]

MBR, Sergei