linux-kernel - Re: [PATCH 3/6] ARM: dts: sun8i: add a cpu0 label to cpu@0 node on A23/33

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Date:   Tue, 13 Dec 2016 16:45:05 +0000
From:   Sudeep Holla <sudeep.holla@....com>
To:     Chen-Yu Tsai <wens@...e.org>
Cc:     Sudeep Holla <sudeep.holla@....com>,
        Icenowy Zheng <icenowy@...c.xyz>,
        Russell King <linux@...linux.org.uk>,
        Maxime Ripard <maxime.ripard@...e-electrons.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Jorik Jonker <jorik@...pendief.biz>,
        Hans de Goede <hdegoede@...hat.com>,
        Quentin Schulz <quentin.schulz@...e-electrons.com>,
        devicetree <devicetree@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-clk <linux-clk@...r.kernel.org>
Subject: Re: [PATCH 3/6] ARM: dts: sun8i: add a cpu0 label to cpu@0 node on
 A23/33



On 13/12/16 16:31, Chen-Yu Tsai wrote:
> On Wed, Dec 14, 2016 at 12:09 AM, Sudeep Holla <sudeep.holla@....com> wrote:
>>
>>
>> On 13/12/16 15:22, Icenowy Zheng wrote:
>>> A "cpu0" label is needed on cpu@0 for cpufreq-dt to work.
>>>
>>
>> IIUC any label should be fine and I don't see anything in the driver
>> looking for such label name. All I see is it looks for cpu0 regulator
>> for *legacy* DTs
>>
>>> Add such a label, in order to prepare for cpufreq support of A23/33.
>>>
>>
>> You need this as you add the same label in the following patches. The
>> commit message sounds like cpufreq-dt search for that label by name.
> 
> I think a more proper explanation would be:
> 
> The cpu's supply regulator is specified at the board level, hence we
> need to add a label to it to reference it without replicating the whole
> tree structure.

Thanks for clarifying, was confused based on the commit log.

-- 
Regards,
Sudeep