linux-kernel - Re: [PATCH v2] phy: freescale: imx8m-pcie: Fix the wrong order of phy_init() and phy_power_on()

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Message-ID: <20220902170449.GA354728@bhelgaas>
Date:   Fri, 2 Sep 2022 12:04:49 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Richard Zhu <hongxing.zhu@....com>
Cc:     a.fatoum@...gutronix.de, l.stach@...gutronix.de,
        bhelgaas@...gle.com, lorenzo.pieralisi@....com, vkoul@...nel.org,
        marcel.ziswiler@...adex.com, kishon@...com,
        linux-phy@...ts.infradead.org, linux-pci@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kernel@...gutronix.de, linux-imx@....com
Subject: Re: [PATCH v2] phy: freescale: imx8m-pcie: Fix the wrong order of
 phy_init() and phy_power_on()

On Wed, Aug 31, 2022 at 02:55:56PM +0800, Richard Zhu wrote:
> Refer to phy_core driver, phy_init() must be called before phy_power_on().
> Fix the wrong order of phy_init() and phy_power_on() here.

> Squash the changes into one patch to avoid the possible bi-section hole.

Avoiding bisection holes goes without saying, so I don't think we need
to even mention it ;)

> Fixes: 1aa97b002258 ("phy: freescale: pcie: Initialize the imx8 pcie standalone phy driver")
> Signed-off-by: Richard Zhu <hongxing.zhu@....com>
> Tested-by: Alexander Stein <alexander.stein@...tq-group.com>

I propose merging this via PCI, since I suspect pci-imx6.c is more
active than phy-fsl-imx8m-pcie.c.

Vinod, if you agree, I'm sure Lorenzo will look for your ack.

> ---
>  drivers/pci/controller/dwc/pci-imx6.c      | 6 +++---
>  drivers/phy/freescale/phy-fsl-imx8m-pcie.c | 8 ++++----
>  2 files changed, 7 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
> index 6e5debdbc55b..b5f0de455a7b 100644
> --- a/drivers/pci/controller/dwc/pci-imx6.c
> +++ b/drivers/pci/controller/dwc/pci-imx6.c
> @@ -935,7 +935,7 @@ static int imx6_pcie_host_init(struct dw_pcie_rp *pp)
>  	}
>  
>  	if (imx6_pcie->phy) {
> -		ret = phy_power_on(imx6_pcie->phy);
> +		ret = phy_init(imx6_pcie->phy);
>  		if (ret) {
>  			dev_err(dev, "pcie PHY power up failed\n");
>  			goto err_clk_disable;
> @@ -949,7 +949,7 @@ static int imx6_pcie_host_init(struct dw_pcie_rp *pp)
>  	}
>  
>  	if (imx6_pcie->phy) {
> -		ret = phy_init(imx6_pcie->phy);
> +		ret = phy_power_on(imx6_pcie->phy);
>  		if (ret) {
>  			dev_err(dev, "waiting for PHY ready timeout!\n");
>  			goto err_phy_off;
> @@ -961,7 +961,7 @@ static int imx6_pcie_host_init(struct dw_pcie_rp *pp)
>  
>  err_phy_off:
>  	if (imx6_pcie->phy)
> -		phy_power_off(imx6_pcie->phy);
> +		phy_exit(imx6_pcie->phy);
>  err_clk_disable:
>  	imx6_pcie_clk_disable(imx6_pcie);
>  err_reg_disable:
> diff --git a/drivers/phy/freescale/phy-fsl-imx8m-pcie.c b/drivers/phy/freescale/phy-fsl-imx8m-pcie.c
> index ad7d2edfc414..c93286483b42 100644
> --- a/drivers/phy/freescale/phy-fsl-imx8m-pcie.c
> +++ b/drivers/phy/freescale/phy-fsl-imx8m-pcie.c
> @@ -59,7 +59,7 @@ struct imx8_pcie_phy {
>  	bool			clkreq_unused;
>  };
>  
> -static int imx8_pcie_phy_init(struct phy *phy)
> +static int imx8_pcie_phy_power_on(struct phy *phy)
>  {
>  	int ret;
>  	u32 val, pad_mode;
> @@ -137,14 +137,14 @@ static int imx8_pcie_phy_init(struct phy *phy)
>  	return ret;
>  }
>  
> -static int imx8_pcie_phy_power_on(struct phy *phy)
> +static int imx8_pcie_phy_init(struct phy *phy)
>  {
>  	struct imx8_pcie_phy *imx8_phy = phy_get_drvdata(phy);
>  
>  	return clk_prepare_enable(imx8_phy->clk);
>  }
>  
> -static int imx8_pcie_phy_power_off(struct phy *phy)
> +static int imx8_pcie_phy_exit(struct phy *phy)
>  {
>  	struct imx8_pcie_phy *imx8_phy = phy_get_drvdata(phy);
>  
> @@ -155,8 +155,8 @@ static int imx8_pcie_phy_power_off(struct phy *phy)
>  
>  static const struct phy_ops imx8_pcie_phy_ops = {
>  	.init		= imx8_pcie_phy_init,
> +	.exit		= imx8_pcie_phy_exit,
>  	.power_on	= imx8_pcie_phy_power_on,
> -	.power_off	= imx8_pcie_phy_power_off,
>  	.owner		= THIS_MODULE,
>  };
>  
> -- 
> 2.25.1
> 
> 
> -- 
> linux-phy mailing list
> linux-phy@...ts.infradead.org
> https://lists.infradead.org/mailman/listinfo/linux-phy

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