linux-kernel - Re: [PATCH V2 2/2] soc: s4: Add support for power domains controller

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Date:   Wed, 12 Jan 2022 09:36:23 +0100
From:   Neil Armstrong <narmstrong@...libre.com>
To:     Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        "Shunzhou.Jiang" <shunzhou.jiang@...ogic.com>
Cc:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org,
        khilman@...libre.com, jbrunet@...libre.com
Subject: Re: [PATCH V2 2/2] soc: s4: Add support for power domains controller

Hi Shunzhou,

On 30/12/2021 23:15, Martin Blumenstingl wrote:
> On Thu, Dec 30, 2021 at 10:44 AM Shunzhou.Jiang
> <shunzhou.jiang@...ogic.com> wrote:
>>
>> From: Shunzhou Jiang <shunzhou.jiang@...ogic.com>
>>
>> Add support s4 Power controller. In s4, power control
>> registers are in secure domain, and should be accessed by smc.
>>
>> Signed-off-by: Shunzhou Jiang <shunzhou.jiang@...ogic.com>
> Also here I don't have any datasheet to compare this with, so this gets my:
> Acked-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
> 
> [...]
>> +       SEC_PD(S4_VPU_HDMI,     GENPD_FLAG_ALWAYS_ON),
>> +       SEC_PD(S4_USB_COMB,     GENPD_FLAG_ALWAYS_ON),
>> +       SEC_PD(S4_GE2D,         0),
>> +       SEC_PD(S4_ETH,          GENPD_FLAG_ALWAYS_ON),
> For the A1 SoC's UART entry we have the following comment which
> explains why we want to to be "always on":
>   UART should keep working in ATF after suspend and before resume
> 
> If for some reason you need to re-send this series then it would be
> great if you could add a comment above each entry with
> GENPD_FLAG_ALWAYS_ON.
> It will help others (like me) understand these SoCs better.

Can you resend with those comments added so I can apply the patches ?

Thanks,
Neil

> 
> 
> Best regards,
> Martin
>