linux-kernel - Re: [PATCH V2] arm: dts: imx7ulp: fix reg of cpu node

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Date:   Wed, 18 Dec 2019 09:44:04 -0300
From:   Fabio Estevam <festevam@...il.com>
To:     Peng Fan <peng.fan@....com>
Cc:     "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "baruch@...s.co.il" <baruch@...s.co.il>,
        dl-linux-imx <linux-imx@....com>,
        Aisheng Dong <aisheng.dong@....com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Alice Guo <alice.guo@....com>
Subject: Re: [PATCH V2] arm: dts: imx7ulp: fix reg of cpu node

On Wed, Dec 18, 2019 at 9:22 AM Peng Fan <peng.fan@....com> wrote:
>
> From: Peng Fan <peng.fan@....com>
>
> According to arm cpus binding doc,
> "
>       On 32-bit ARM v7 or later systems this property is
>         required and matches the CPU MPIDR[23:0] register
>         bits.
>
>         Bits [23:0] in the reg cell must be set to
>         bits [23:0] in MPIDR.
>
>         All other bits in the reg cell must be set to 0.
> "
>
> In i.MX7ULP, the MPIDR[23:0] is 0xf00, not 0, so fix it.
> Otherwise there will be warning:
> "DT missing boot CPU MPIDR[23:0], fall back to default cpu_logical_map"
>
> Fixes: 20434dc92c05 ("ARM: dts: imx: add common imx7ulp dtsi support")
> Signed-off-by: Peng Fan <peng.fan@....com>

Reviewed-by: Fabio Estevam <festevam@...il.com>