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

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Message-ID: <4557abf9-bcd2-4a06-8161-43ad5047b277@quicinc.com>
Date: Fri, 11 Apr 2025 16:12:46 +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 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.

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
>>
>