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Message-ID: <AS8PR04MB86764686EC7F5F4D5BA55B6E8C7F9@AS8PR04MB8676.eurprd04.prod.outlook.com>
Date: Mon, 5 Sep 2022 02:14:00 +0000
From: Hongxing Zhu <hongxing.zhu@....com>
To: Bjorn Helgaas <helgaas@...nel.org>
CC: "a.fatoum@...gutronix.de" <a.fatoum@...gutronix.de>,
"l.stach@...gutronix.de" <l.stach@...gutronix.de>,
"bhelgaas@...gle.com" <bhelgaas@...gle.com>,
"lorenzo.pieralisi@....com" <lorenzo.pieralisi@....com>,
"vkoul@...nel.org" <vkoul@...nel.org>,
Marcel Ziswiler <marcel.ziswiler@...adex.com>,
"kishon@...com" <kishon@...com>,
"linux-phy@...ts.infradead.org" <linux-phy@...ts.infradead.org>,
"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"kernel@...gutronix.de" <kernel@...gutronix.de>,
dl-linux-imx <linux-imx@....com>
Subject: RE: [PATCH v2] phy: freescale: imx8m-pcie: Fix the wrong order of
phy_init() and phy_power_on()
> -----Original Message-----
> From: Bjorn Helgaas <helgaas@...nel.org>
> Sent: 2022年9月3日 1:05
> To: Hongxing Zhu <hongxing.zhu@....com>
> Cc: a.fatoum@...gutronix.de; l.stach@...gutronix.de; bhelgaas@...gle.com;
> lorenzo.pieralisi@....com; vkoul@...nel.org; Marcel Ziswiler
> <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; dl-linux-imx
> <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 ;)
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@....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
> >
> >
> > --
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> > linux-phy@...ts.infradead.org
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