linux-kernel - RE: [PATCH 1/5] Documentation: dt: binding: fsl: Add 'fsl,ippdexpcr1-alt-addr' property

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Date:   Mon, 21 Sep 2020 22:20:03 +0000
From:   Leo Li <leoyang.li@....com>
To:     Ran Wang <ran.wang_1@....com>, Rob Herring <robh+dt@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>
CC:     "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Biwen Li <biwen.li@....com>, Ran Wang <ran.wang_1@....com>
Subject: RE: [PATCH 1/5] Documentation: dt: binding: fsl: Add
 'fsl,ippdexpcr1-alt-addr' property



> -----Original Message-----
> From: Ran Wang <ran.wang_1@....com>
> Sent: Wednesday, September 16, 2020 3:18 AM
> To: Leo Li <leoyang.li@....com>; Rob Herring <robh+dt@...nel.org>;
> Shawn Guo <shawnguo@...nel.org>
> Cc: linuxppc-dev@...ts.ozlabs.org; linux-arm-kernel@...ts.infradead.org;
> devicetree@...r.kernel.org; linux-kernel@...r.kernel.org; Biwen Li
> <biwen.li@....com>; Ran Wang <ran.wang_1@....com>
> Subject: [PATCH 1/5] Documentation: dt: binding: fsl: Add 'fsl,ippdexpcr1-alt-
> addr' property
> 
> From: Biwen Li <biwen.li@....com>
> 
> The 'fsl,ippdexpcr1-alt-addr' property is used to handle an errata A-008646 on
> LS1021A

It looks like the previous version of this patch has gotten the reviewed-by from Rob.  It would be good to be added to the patch for new submission.

> 
> Signed-off-by: Biwen Li <biwen.li@....com>
> Signed-off-by: Ran Wang <ran.wang_1@....com>
> ---
>  Documentation/devicetree/bindings/soc/fsl/rcpm.txt | 19
> +++++++++++++++++++
>  1 file changed, 19 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/soc/fsl/rcpm.txt
> b/Documentation/devicetree/bindings/soc/fsl/rcpm.txt
> index 5a33619..1be58a3 100644
> --- a/Documentation/devicetree/bindings/soc/fsl/rcpm.txt
> +++ b/Documentation/devicetree/bindings/soc/fsl/rcpm.txt
> @@ -34,6 +34,11 @@ Chassis Version		Example Chips
>  Optional properties:
>   - little-endian : RCPM register block is Little Endian. Without it RCPM
>     will be Big Endian (default case).
> + - fsl,ippdexpcr1-alt-addr : The property is related to a hardware issue
> +   on SoC LS1021A and only needed on SoC LS1021A.
> +   Must include 2 entries:
> +   The first entry must be a link to the SCFG device node.
> +   The 2nd entry must be offset of register IPPDEXPCR1 in SCFG.
> 
>  Example:
>  The RCPM node for T4240:
> @@ -43,6 +48,20 @@ The RCPM node for T4240:
>  		#fsl,rcpm-wakeup-cells = <2>;
>  	};
> 
> +The RCPM node for LS1021A:
> +	rcpm: rcpm@...2140 {
> +		compatible = "fsl,ls1021a-rcpm", "fsl,qoriq-rcpm-2.1+";
> +		reg = <0x0 0x1ee2140 0x0 0x8>;
> +		#fsl,rcpm-wakeup-cells = <2>;
> +
> +		/*
> +		 * The second and third entry compose an alt offset
> +		 * address for IPPDEXPCR1(SCFG_SPARECR8)
> +		 */
> +		fsl,ippdexpcr1-alt-addr = <&scfg 0x51c>;
> +	};
> +
> +
>  * Freescale RCPM Wakeup Source Device Tree Bindings
>  -------------------------------------------
>  Required fsl,rcpm-wakeup property should be added to a device node if the
> device
> --
> 2.7.4