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Date:   Tue, 17 Oct 2017 16:17:39 -0500
From:   Rob Herring <robh@...nel.org>
To:     Li Wei <liwei213@...wei.com>
Cc:     mark.rutland@....com, xuwei5@...ilicon.com,
        catalin.marinas@....com, will.deacon@....com,
        vinholikatti@...il.com, jejb@...ux.vnet.ibm.com,
        martin.petersen@...cle.com, khilman@...libre.com, arnd@...db.de,
        gregory.clement@...e-electrons.com,
        thomas.petazzoni@...e-electrons.com, yamada.masahiro@...ionext.com,
        riku.voipio@...aro.org, treding@...dia.com, krzk@...nel.org,
        eric@...olt.net, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-scsi@...r.kernel.org, guodong.xu@...aro.org,
        fengbaopeng@...ilicon.com, lihuan41@...ilicon.com,
        wangyupeng4@...ilicon.com
Subject: Re: [PATCH v4 2/5] dt-bindings: scsi: ufs: add document for hisi-ufs

On Fri, Oct 13, 2017 at 03:49:33PM +0800, Li Wei wrote:
> add ufs node document for Hisilicon.
> 
> Signed-off-by: Li Wei <liwei213@...wei.com>
> ---
>  Documentation/devicetree/bindings/ufs/ufs-hisi.txt | 47 ++++++++++++++++++++++
>  1 file changed, 47 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/ufs/ufs-hisi.txt
> 
> diff --git a/Documentation/devicetree/bindings/ufs/ufs-hisi.txt b/Documentation/devicetree/bindings/ufs/ufs-hisi.txt
> new file mode 100644
> index 000000000000..ee114a65143d
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/ufs/ufs-hisi.txt
> @@ -0,0 +1,47 @@
> +* Hisilicon Universal Flash Storage (UFS) Host Controller
> +
> +UFS nodes are defined to describe on-chip UFS hardware macro.
> +Each UFS Host Controller should have its own node.
> +
> +Required properties:
> +- compatible        : compatible list, contains one of the following -
> +			"hisilicon,hi3660-ufs" for hisi ufs host controller
> +			 present on Hi3660 chipset.
> +- reg               : should contain UFS register address space & UFS SYS CTRL register address,
> +- interrupt-parent  : interrupt device
> +- interrupts        : interrupt number
> +- clocks	        : List of phandle and clock specifier pairs
> +- clock-names       : List of clock input name strings sorted in the same
> +		      order as the clocks property. "clk_ref", "clk_phy" is optional
> +- resets            : reset node register, one reset the clk and the other reset the controller
> +- reset-names       : describe reset node register
> +
> +Optional properties for board device:
> +- reset-gpio			: specifies to reset devices

Should be "reset-gpios".

> +
> +Example:
> +
> +	ufs: ufs@...b0000 {
> +		compatible = "hisilicon,hi3660-ufs", "jedec,ufs-1.1";
> +		/* 0: HCI standard */
> +		/* 1: UFS SYS CTRL */
> +		reg = <0x0 0xff3b0000 0x0 0x1000>,
> +			<0x0 0xff3b1000 0x0 0x1000>;
> +		interrupt-parent = <&gic>;
> +		interrupts = <GIC_SPI 278 IRQ_TYPE_LEVEL_HIGH>;
> +		clocks = <&crg_ctrl HI3660_CLK_GATE_UFSIO_REF>,
> +			<&crg_ctrl HI3660_CLK_GATE_UFSPHY_CFG>;
> +		clock-names = "clk_ref", "clk_phy";
> +		freq-table-hz = <0 0>, <0 0>;
> +		/* offset: 0x84; bit: 12 */
> +		/* offset: 0x84; bit: 7  */
> +		resets = <&crg_rst 0x84 12>,
> +			<&crg_rst 0x84 7>;
> +		reset-names = "rst", "assert";
> +	};
> +
> +	&ufs {
> +		reset-gpio = <&gpio18 1 0>;
> +		status = "okay";

Don't show status or the chip/board split in examples.

> +	};
> +
> -- 
> 2.11.0
> 

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