linux-kernel - Re: [PATCH V3 5/9] phy: qcom-qmp-ufs: Remove qmp_ufs_com

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Message-ID: <64216a90-e2e0-435c-87bc-388c72a702c0@quicinc.com>
Date: Mon, 14 Apr 2025 12:58:48 +0530
From: Nitin Rawat <quic_nitirawa@...cinc.com>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
CC: <vkoul@...nel.org>, <kishon@...nel.org>,
        <manivannan.sadhasivam@...aro.org>,
        <James.Bottomley@...senpartnership.com>, <martin.petersen@...cle.com>,
        <bvanassche@....org>, <bjorande@...cinc.com>,
        <neil.armstrong@...aro.org>, <konrad.dybcio@....qualcomm.com>,
        <quic_rdwivedi@...cinc.com>, <linux-arm-msm@...r.kernel.org>,
        <linux-phy@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        <linux-scsi@...r.kernel.org>
Subject: Re: [PATCH V3 5/9] phy: qcom-qmp-ufs: Remove qmp_ufs_com_init()



On 4/11/2025 4:26 PM, Dmitry Baryshkov wrote:
> On Fri, 11 Apr 2025 at 13:42, Nitin Rawat <quic_nitirawa@...cinc.com> wrote:
>>
>>
>>
>> On 4/11/2025 1:39 AM, Dmitry Baryshkov wrote:
>>> On Thu, Apr 10, 2025 at 02:30:58PM +0530, Nitin Rawat wrote:
>>>> Simplify the qcom ufs phy driver by inlining qmp_ufs_com_init() into
>>>> qmp_ufs_power_on(). This change removes unnecessary function calls and
>>>> ensures that the initialization logic is directly within the power-on
>>>> routine, maintaining the same functionality.
>>>
>>> Which problem is this patch trying to solve?
>>
>> Hi Dmitry,
>>
>> As part of the patch, I simplified the code by moving qmp_ufs_com_init
>> inline to qmp_ufs_power_on, since qmp_ufs_power_on was merely calling
>> qmp_ufs_com_init. This change eliminates unnecessary function call.
> 
> You again are describing what you did. Please start by stating the
> problem or the issue.
> 
>>
Hi Dmitry,

Sure, will update the commit with "problem" first in the next patchset 
when I post.

Thanks,
Nitin

>> Regards,
>> Nitin
>>
>>
>>
>>>
>>>>
>>>> Signed-off-by: Nitin Rawat <quic_nitirawa@...cinc.com>
>>>> ---
>>>>    drivers/phy/qualcomm/phy-qcom-qmp-ufs.c | 44 ++++++++++---------------
>>>>    1 file changed, 18 insertions(+), 26 deletions(-)
>>>>
>>>> diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c b/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
>>>> index 12dad28cc1bd..2cc819089d71 100644
>>>> --- a/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
>>>> +++ b/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
>>>> @@ -1757,31 +1757,6 @@ static void qmp_ufs_init_registers(struct qmp_ufs *qmp, const struct qmp_phy_cfg
>>>>       qmp_ufs_init_all(qmp, &cfg->tbls_hs_b);
>>>>    }
>>>>
>>>> -static int qmp_ufs_com_init(struct qmp_ufs *qmp)
>>>> -{
>>>> -    const struct qmp_phy_cfg *cfg = qmp->cfg;
>>>> -    void __iomem *pcs = qmp->pcs;
>>>> -    int ret;
>>>> -
>>>> -    ret = regulator_bulk_enable(cfg->num_vregs, qmp->vregs);
>>>> -    if (ret) {
>>>> -            dev_err(qmp->dev, "failed to enable regulators, err=%d\n", ret);
>>>> -            return ret;
>>>> -    }
>>>> -
>>>> -    ret = clk_bulk_prepare_enable(qmp->num_clks, qmp->clks);
>>>> -    if (ret)
>>>> -            goto err_disable_regulators;
>>>> -
>>>> -    qphy_setbits(pcs, cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL], SW_PWRDN);
>>>> -
>>>> -    return 0;
>>>> -
>>>> -err_disable_regulators:
>>>> -    regulator_bulk_disable(cfg->num_vregs, qmp->vregs);
>>>> -
>>>> -    return ret;
>>>> -}
>>>>
>>>>    static int qmp_ufs_com_exit(struct qmp_ufs *qmp)
>>>>    {
>>>> @@ -1799,10 +1774,27 @@ static int qmp_ufs_com_exit(struct qmp_ufs *qmp)
>>>>    static int qmp_ufs_power_on(struct phy *phy)
>>>>    {
>>>>       struct qmp_ufs *qmp = phy_get_drvdata(phy);
>>>> +    const struct qmp_phy_cfg *cfg = qmp->cfg;
>>>> +    void __iomem *pcs = qmp->pcs;
>>>>       int ret;
>>>> +
>>>>       dev_vdbg(qmp->dev, "Initializing QMP phy\n");
>>>>
>>>> -    ret = qmp_ufs_com_init(qmp);
>>>> +    ret = regulator_bulk_enable(cfg->num_vregs, qmp->vregs);
>>>> +    if (ret) {
>>>> +            dev_err(qmp->dev, "failed to enable regulators, err=%d\n", ret);
>>>> +            return ret;
>>>> +    }
>>>> +
>>>> +    ret = clk_bulk_prepare_enable(qmp->num_clks, qmp->clks);
>>>> +    if (ret)
>>>> +            goto err_disable_regulators;
>>>> +
>>>> +    qphy_setbits(pcs, cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL], SW_PWRDN);
>>>> +    return 0;
>>>> +
>>>> +err_disable_regulators:
>>>> +    regulator_bulk_disable(cfg->num_vregs, qmp->vregs);
>>>>       return ret;
>>>>    }
>>>>
>>>> --
>>>> 2.48.1
>>>>
>>>
>>
> 
>