linux-kernel - Re: [PATCH v1 3/3] riscv: dts: starfive: Add mmc node

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Message-ID: <899cbd21-1ac9-682e-7d07-f8a3c49d4504@starfivetech.com>
Date:   Mon, 16 Jan 2023 18:13:20 +0800
From:   William Qiu <william.qiu@...rfivetech.com>
To:     Linus Walleij <linus.walleij@...aro.org>
CC:     <linux-riscv@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-mmc@...r.kernel.org>, Rob Herring <robh+dt@...nel.org>,
        "Krzysztof Kozlowski" <krzysztof.kozlowski+dt@...aro.org>,
        Jaehoon Chung <jh80.chung@...sung.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1 3/3] riscv: dts: starfive: Add mmc node



On 2022/12/9 5:15, Linus Walleij wrote:
> Hi William,
> 
> thanks for your patch!
> 
> On Wed, Dec 7, 2022 at 2:17 PM William Qiu <william.qiu@...rfivetech.com> wrote:
> 
>> +                       starfive,sys-syscon = <&sys_syscon 0x14 0x1a 0x7c000000>;
> (...)
>> +                       starfive,sys-syscon = <&sys_syscon 0x9c 0x1 0x3e>;
> 
> These are registster offsets and shifts. Don't define such stuff in your device
> tree, use #defines in the code and just provide the phandle.
> 
Hi Linus,

I'm sorry to bother you, but as for the definition of syscon, after discussing with 
my colleagues, we think it is easier to distinguish SDIO0 and SDIO1 by defining it in
the device tree, and the code compatibility is better. I expected to discuss this issue
with you in V2,, but I am not sure whether you have seen V2, so I can only ask for
your advice in V1.

Best Regards
William Qiu
> Yours,
> Linus Walleij