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

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Message-ID: <zvc3gf7mek7u46wlcrjak3j2hihj4vfgdwpdzjhvnxxowuyvsr@hlra5bmz5ign>
Date: Thu, 10 Apr 2025 23:09:16 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Nitin Rawat <quic_nitirawa@...cinc.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 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?

> 
> 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
> 

-- 
With best wishes
Dmitry