linux-kernel - Re: [PATCH v1 1/2] riscv: dts: starfive: enable DCDC1&ALDO4 node in axp15060

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Date:   Fri, 11 Aug 2023 10:20:07 +0800
From:   William Qiu <william.qiu@...rfivetech.com>
To:     Emil Renner Berthing <emil.renner.berthing@...onical.com>
CC:     <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-riscv@...ts.infradead.org>,
        Emil Renner Berthing <kernel@...il.dk>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>
Subject: Re: [PATCH v1 1/2] riscv: dts: starfive: enable DCDC1&ALDO4 node in
 axp15060

On 2023/8/10 19:31, Emil Renner Berthing wrote:
> On Wed, 9 Aug 2023 at 03:41, William Qiu <william.qiu@...rfivetech.com> wrote:
>>
>> Enable DCDC1 node for vmmc-supply and enable ALDO4 node for
>> vqmmc-supply.
>>
>> Signed-off-by: William Qiu <william.qiu@...rfivetech.com>
>> ---
>>  .../starfive/jh7110-starfive-visionfive-2.dtsi   | 16 ++++++++++++++++
>>  1 file changed, 16 insertions(+)
>>
>> diff --git a/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-2.dtsi b/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-2.dtsi
>> index d2f3b9eb859b..d67e26b9c791 100644
>> --- a/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-2.dtsi
>> +++ b/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-2.dtsi
>> @@ -165,12 +165,28 @@ axp15060: pmic@36 {
>>                 #interrupt-cells = <1>;
>>
>>                 regulators {
>> +                       vcc_3v3: dcdc1 {
>> +                               regulator-boot-on;
>> +                               regulator-always-on;
>> +                               regulator-min-microvolt = <3300000>;
>> +                               regulator-max-microvolt = <3300000>;
>> +                               regulator-name = "vcc_3v3";
>> +                       };
>> +
>>                         vdd_cpu: dcdc2 {
>>                                 regulator-always-on;
>>                                 regulator-min-microvolt = <500000>;
>>                                 regulator-max-microvolt = <1540000>;
>>                                 regulator-name = "vdd-cpu";
>>                         };
>> +
>> +                       emmc_vdd: aldo4 {
>> +                               regulator-boot-on;
>> +                               regulator-always-on;
> 
> Hi William,
> 
> Just a question: You mark these regulators as always-on, so they'll
> never be shut off even if the device is suspended. Is that because the
> mmc driver can't deal with reinitializing the mmc/sd-card if the card
> has been shut off while suspended or is there some other reason to
> mark them always-on?
> 

Hi Emil,

Because now hibernation's storage medium is currently SD/eMMC, so we need
to mark SD/eMMC always-on.

Best Regards,
William
>> +                               regulator-min-microvolt = <1800000>;
>> +                               regulator-max-microvolt = <1800000>;
>> +                               regulator-name = "emmc_vdd";
>> +                       };
>>                 };
>>         };
>>  };
>> --
>> 2.34.1
>>
>>
>> _______________________________________________
>> linux-riscv mailing list
>> linux-riscv@...ts.infradead.org
>> http://lists.infradead.org/mailman/listinfo/linux-riscv

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