linux-kernel - Re: [PATCH 3/6] regulator: qcom

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Date:   Tue, 31 Jan 2023 15:46:56 +0530
From:   Devi Priya <quic_devipriy@...cinc.com>
To:     Konrad Dybcio <konrad.dybcio@...aro.org>, <agross@...nel.org>,
        <andersson@...nel.org>, <lgirdwood@...il.com>,
        <broonie@...nel.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>,
        <linux-arm-msm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <devicetree@...r.kernel.org>
CC:     <quic_srichara@...cinc.com>, <quic_gokulsri@...cinc.com>,
        <quic_sjaganat@...cinc.com>, <quic_kathirav@...cinc.com>,
        <quic_arajkuma@...cinc.com>, <quic_anusha@...cinc.com>,
        <quic_poovendh@...cinc.com>, <quic_ipkumar@...cinc.com>
Subject: Re: [PATCH 3/6] regulator: qcom_smd: Add MP5496 regulators



On 1/27/2023 9:33 PM, Konrad Dybcio wrote:
> 
> 
> On 27.01.2023 17:01, Devi Priya wrote:
>>
>>
>> On 1/13/2023 8:54 PM, Konrad Dybcio wrote:
>>>
>>>
>>> On 13.01.2023 16:03, devi priya wrote:
>>>> Adding support for PMIC MP5496 on IPQ9574 SoC
>>>>
>>>> Co-developed-by: Praveenkumar I <quic_ipkumar@...cinc.com>
>>>> Signed-off-by: Praveenkumar I <quic_ipkumar@...cinc.com>
>>>> Signed-off-by: devi priya <quic_devipriy@...cinc.com>
>>>> ---
>>> Please simply extend the existing MP5496 support with this
>>> S1 regulator. If you don't explicitly define and set voltages
>>> for the other vregs, they will not be probed.
>>>
>>> Konrad
>> IPQ6018 and IPQ9574 platforms use the same PMIC MP5496 but they have a different power layout. IPQ9574 has S2 regulator which will be used for NSS scaling but S2 in IPQ6018 serves a different purpose. Hence it would not be possible to extend the existing MP5496 support for IPQ9574
> Does the s2 on IPQ9574 have a different voltage range than
> the one on IPQ6018? No? Then there's nothing blocking you
> from using the setup for both SoCs. As I've mentioned,
> regulators that you don't add to the device tree will
> not even be probed.
> 
Yeah, understood! will update this in V2
> Konrad
>>>>    drivers/regulator/qcom_smd-regulator.c | 16 ++++++++++++++++
>>>>    1 file changed, 16 insertions(+)
>>>>
>>>> diff --git a/drivers/regulator/qcom_smd-regulator.c b/drivers/regulator/qcom_smd-regulator.c
>>>> index 9f2b58458841..1eb17d378897 100644
>>>> --- a/drivers/regulator/qcom_smd-regulator.c
>>>> +++ b/drivers/regulator/qcom_smd-regulator.c
>>>> @@ -767,6 +767,15 @@ static const struct regulator_desc mp5496_ldoa2 = {
>>>>        .ops = &rpm_mp5496_ops,
>>>>    };
>>>>    +static const struct regulator_desc ipq9574_mp5496_smpa1 = {
>>>> +    .linear_ranges = (struct linear_range[]) {
>>>> +        REGULATOR_LINEAR_RANGE(600000, 0, 37, 12500),
>>>> +    },
>>>> +    .n_linear_ranges = 1,
>>>> +    .n_voltages = 38,
>>>> +    .ops = &rpm_mp5496_ops,
>>>> +};
>>>> +
>>>>    static const struct regulator_desc pm2250_lvftsmps = {
>>>>        .linear_ranges = (struct linear_range[]) {
>>>>            REGULATOR_LINEAR_RANGE(320000, 0, 269, 4000),
>>>> @@ -799,6 +808,11 @@ static const struct rpm_regulator_data rpm_mp5496_regulators[] = {
>>>>        {}
>>>>    };
>>>>    +static const struct rpm_regulator_data rpm_ipq9574_mp5496_regulators[] = {
>>>> +    { "s1", QCOM_SMD_RPM_SMPA, 1, &ipq9574_mp5496_smpa1, "s1" },
>>>> +    {}
>>>> +};
>>>> +
>>>>    static const struct rpm_regulator_data rpm_pm2250_regulators[] = {
>>>>        { "s1", QCOM_SMD_RPM_SMPA, 1, &pm2250_lvftsmps, "vdd_s1" },
>>>>        { "s2", QCOM_SMD_RPM_SMPA, 2, &pm2250_lvftsmps, "vdd_s2" },
>>>> @@ -1320,6 +1334,8 @@ static const struct rpm_regulator_data rpm_pms405_regulators[] = {
>>>>    };
>>>>      static const struct of_device_id rpm_of_match[] = {
>>>> +    { .compatible = "qcom,rpm-ipq9574-mp5496-regulators",
>>>> +        .data = &rpm_ipq9574_mp5496_regulators },
>>>>        { .compatible = "qcom,rpm-mp5496-regulators", .data = &rpm_mp5496_regulators },
>>>>        { .compatible = "qcom,rpm-pm2250-regulators", .data = &rpm_pm2250_regulators },
>>>>        { .compatible = "qcom,rpm-pm6125-regulators", .data = &rpm_pm6125_regulators },
>> Best Regards,
>> Devi Priya
Best Regards,
Devi Priya