linux-kernel - Re: [PATCH v9 7/7] dt-bindings: ufshcd-pltfrm: Add core reset string

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Date:   Thu, 27 Sep 2018 10:06:06 -0500
From:   Rob Herring <robh@...nel.org>
To:     Can Guo <quic_cang@...cinc.com>
Cc:     subhashj@...eaurora.org, asutoshd@...eaurora.org,
        vivek.gautam@...eaurora.org, evgreen@...omium.org,
        rnayak@...eaurora.org, vinholikatti@...il.com,
        jejb@...ux.vnet.ibm.com, martin.petersen@...cle.com,
        Can Guo <cang@...eaurora.org>,
        Amit Nischal <anischal@...eaurora.org>,
        Mark Rutland <mark.rutland@....com>,
        Mathieu Malaterre <malat@...ian.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v9 7/7] dt-bindings: ufshcd-pltfrm: Add core reset string

On Thu, Sep 20, 2018 at 09:28:00PM -0700, Can Guo wrote:
> From: Can Guo <cang@...eaurora.org>
> 
> Add core reset support string for UFS.
> 
> Signed-off-by: Amit Nischal <anischal@...eaurora.org>
> Signed-off-by: Can Guo <cang@...eaurora.org>
> ---
>  Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt b/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt
> index c39dfef..6b697c4 100644
> --- a/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt
> +++ b/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt
> @@ -11,6 +11,11 @@ Required properties:
>  					  "qcom,ufshc"
>  - interrupts        : <interrupt mapping for UFS host controller IRQ>
>  - reg               : <registers mapping>
> +- reset             : reset specifier pair consists of phandle for the reset provider
> +                      and reset lines used by this controller. It is mandatory for
> +		      QCOM SDM845 platform.
> +- reset-names       : reset signal name strings sorted in the same order as the
> +		      resets property. It is mandatory for QCOM SDM845 platform.

This already exists as of 4.19 under optional properties. (And you can't 
add new required properties anyways.)

>  
>  Optional properties:
>  - phys                  : phandle to UFS PHY node
> @@ -64,6 +69,8 @@ Example:
>  		clocks = <&core 0>, <&ref 0>, <&iface 0>;
>  		clock-names = "core_clk", "ref_clk", "iface_clk";
>  		freq-table-hz = <100000000 200000000>, <0 0>, <0 0>;
> +		resets = <clock_gcc GCC_UFS_BCR>;
> +		reset-names = "core_reset";

And the name should be "rst" (or omitted).

>  		phys = <&ufsphy1>;
>  		phy-names = "ufsphy";
>  	};
> -- 
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>