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

[Hongxing Zhu]

> -----Original Message-----
> From: Bjorn Helgaas <helgaas at kernel.org>
> Sent: 2022年9月3日 1:05
> To: Hongxing Zhu <hongxing.zhu at nxp.com>
> Cc: a.fatoum at pengutronix.de; l.stach at pengutronix.de; bhelgaas at google.com;
> lorenzo.pieralisi at arm.com; vkoul at kernel.org; Marcel Ziswiler
> <marcel.ziswiler at toradex.com>; kishon at ti.com; linux-phy at lists.infradead.org;
> linux-pci at vger.kernel.org; linux-arm-kernel at lists.infradead.org;
> linux-kernel at vger.kernel.org; kernel at pengutronix.de; dl-linux-imx
> <linux-imx at nxp.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 ;)
Hi Bjorn:
Understood 😊. Thanks for your kindly help on this fix.
For ease of merging, I would remove that line, and re-send the v3 with Vinod's
 ACK added.

Best Regards
Richard Zhu

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