linux-kernel - Re: [PATCH V5 07/11] phy: qcom-qmp-ufs: Remove qmp_ufs_exit() and Inline qmp_ufs_com

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Message-ID: <79d2f373-ee53-4cd2-b228-171daf3adcb7@quicinc.com>
Date: Thu, 22 May 2025 03:49:12 +0530
From: Nitin Rawat <quic_nitirawa@...cinc.com>
To: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
CC: <vkoul@...nel.org>, <kishon@...nel.org>,
        <James.Bottomley@...senpartnership.com>, <martin.petersen@...cle.com>,
        <bvanassche@....org>, <andersson@...nel.org>,
        <neil.armstrong@...aro.org>, <dmitry.baryshkov@....qualcomm.com>,
        <konrad.dybcio@....qualcomm.com>, <quic_rdwivedi@...cinc.com>,
        <quic_cang@...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 V5 07/11] phy: qcom-qmp-ufs: Remove qmp_ufs_exit() and
 Inline qmp_ufs_com_exit()



On 5/21/2025 7:19 PM, Manivannan Sadhasivam wrote:
> On Thu, May 15, 2025 at 09:57:18PM +0530, Nitin Rawat wrote:
>> qmp_ufs_exit() is a wrapper function. It only calls qmp_ufs_com_exit().
>> Remove it to simplify the ufs phy driver.
>>
> 
> Okay, so you are doing it now...

Yes

> 
>> Additonally partial Inline(dropping the reset assert) qmp_ufs_com_exit
>> into qmp_ufs_power_off function to avoid unnecessary function call.
>>
> 
> Why are you dropping the reset_assert()?

This was not aligning to Phy programming guide .


> 
>> Signed-off-by: Nitin Rawat <quic_nitirawa@...cinc.com>
>> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
>> ---
>>   drivers/phy/qualcomm/phy-qcom-qmp-ufs.c | 19 +++++--------------
>>   1 file changed, 5 insertions(+), 14 deletions(-)
>>
>> diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c b/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
>> index a5974a1fb5bb..fca47e5e8bf0 100644
>> --- a/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
>> +++ b/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
>> @@ -1758,19 +1758,6 @@ 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_exit(struct qmp_ufs *qmp)
>> -{
>> -	const struct qmp_phy_cfg *cfg = qmp->cfg;
>> -
>> -	reset_control_assert(qmp->ufs_reset);
>> -
>> -	clk_bulk_disable_unprepare(qmp->num_clks, qmp->clks);
>> -
>> -	regulator_bulk_disable(cfg->num_vregs, qmp->vregs);
>> -
>> -	return 0;
>> -}
>> -
>>   static int qmp_ufs_power_on(struct phy *phy)
>>   {
>>   	struct qmp_ufs *qmp = phy_get_drvdata(phy);
>> @@ -1851,7 +1838,11 @@ static int qmp_ufs_power_off(struct phy *phy)
>>   	qphy_clrbits(qmp->pcs, cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL],
>>   			SW_PWRDN);
>>   
>> -	qmp_ufs_com_exit(qmp);
>> +	/* Turn off all the phy clocks */
> 
> You should drop this and below comment. They add no value.

Comments are actually provided for each operation within 
qmp_ufs_power_off which actually facilitate understanding of all actions 
performed by the function which may not be fully clear by code. Hence
I thought to keep the comments. But If you insist i'll remove.

Thanks.
Nitin


> 
> - Mani
>