| Message ID | 1665625622-20551-5-git-send-email-hongxing.zhu@nxp.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add the iMX8MP PCIe support | expand |
On 10/13/22 03:47, Richard Zhu wrote: Hi, [...] > @@ -238,6 +251,14 @@ static int imx8_pcie_phy_probe(struct platform_device *pdev) > return PTR_ERR(imx8_phy->reset); > } > > + if (imx8_phy->drvdata->variant == IMX8MP) { > + imx8_phy->perst = > + devm_reset_control_get_exclusive(dev, "perst"); > + if (IS_ERR(imx8_phy->perst)) > + dev_err_probe(dev, PTR_ERR(imx8_phy->perst), I just notice this , are we missing return here ? That is ... return dev_err_probe(...) ? > + "Failed to get PCIE PHY PERST control\n"); > + } [...]
> -----Original Message----- > From: Marek Vasut <marex@denx.de> > Sent: 2022年12月18日 3:47 > To: Hongxing Zhu <hongxing.zhu@nxp.com>; vkoul@kernel.org; > a.fatoum@pengutronix.de; p.zabel@pengutronix.de; l.stach@pengutronix.de; > bhelgaas@google.com; lorenzo.pieralisi@arm.com; robh@kernel.org; > shawnguo@kernel.org; alexander.stein@ew.tq-group.com; > richard.leitner@linux.dev > Cc: linux-phy@lists.infradead.org; devicetree@vger.kernel.org; > linux-pci@vger.kernel.org; linux-arm-kernel@lists.infradead.org; > linux-kernel@vger.kernel.org; kernel@pengutronix.de; dl-linux-imx > <linux-imx@nxp.com> > Subject: Re: [RESEND v12 4/4] phy: freescale: imx8m-pcie: Add i.MX8MP PCIe > PHY support > > On 10/13/22 03:47, Richard Zhu wrote: > > Hi, > > [...] > > > @@ -238,6 +251,14 @@ static int imx8_pcie_phy_probe(struct > platform_device *pdev) > > return PTR_ERR(imx8_phy->reset); > > } > > > > + if (imx8_phy->drvdata->variant == IMX8MP) { > > + imx8_phy->perst = > > + devm_reset_control_get_exclusive(dev, "perst"); > > + if (IS_ERR(imx8_phy->perst)) > > + dev_err_probe(dev, PTR_ERR(imx8_phy->perst), > > I just notice this , are we missing return here ? > > That is ... return dev_err_probe(...) ? Ooh, it's my fault. Thanks for your reminder. One return should be here. - dev_err_probe(dev, PTR_ERR(imx8_phy->perst), + return dev_err_probe(dev, PTR_ERR(imx8_phy->perst), Hi Vinod @vkoul@kernel.org: Should I re-summit one fix patch? Best Regards Richard Zhu > > > + "Failed to get PCIE PHY PERST control\n"); > > + } > > [...]
On 12/19/22 04:25, Hongxing Zhu wrote: Hi, >>> @@ -238,6 +251,14 @@ static int imx8_pcie_phy_probe(struct >> platform_device *pdev) >>> return PTR_ERR(imx8_phy->reset); >>> } >>> >>> + if (imx8_phy->drvdata->variant == IMX8MP) { >>> + imx8_phy->perst = >>> + devm_reset_control_get_exclusive(dev, "perst"); >>> + if (IS_ERR(imx8_phy->perst)) >>> + dev_err_probe(dev, PTR_ERR(imx8_phy->perst), >> >> I just notice this , are we missing return here ? >> >> That is ... return dev_err_probe(...) ? > > Ooh, it's my fault. Thanks for your reminder. > One return should be here. > - dev_err_probe(dev, PTR_ERR(imx8_phy->perst), > + return dev_err_probe(dev, PTR_ERR(imx8_phy->perst), > Hi Vinod @vkoul@kernel.org: > Should I re-summit one fix patch? I think just send a follow up patch with Fixes: tag .
diff --git a/drivers/phy/freescale/phy-fsl-imx8m-pcie.c b/drivers/phy/freescale/phy-fsl-imx8m-pcie.c index 3e494612db3c..7585e8080b77 100644 --- a/drivers/phy/freescale/phy-fsl-imx8m-pcie.c +++ b/drivers/phy/freescale/phy-fsl-imx8m-pcie.c @@ -48,6 +48,7 @@ enum imx8_pcie_phy_type { IMX8MM, + IMX8MP, }; struct imx8_pcie_phy_drvdata { @@ -60,6 +61,7 @@ struct imx8_pcie_phy { struct clk *clk; struct phy *phy; struct regmap *iomuxc_gpr; + struct reset_control *perst; struct reset_control *reset; u32 refclk_pad_mode; u32 tx_deemph_gen1; @@ -74,11 +76,11 @@ static int imx8_pcie_phy_power_on(struct phy *phy) u32 val, pad_mode; struct imx8_pcie_phy *imx8_phy = phy_get_drvdata(phy); - reset_control_assert(imx8_phy->reset); - pad_mode = imx8_phy->refclk_pad_mode; switch (imx8_phy->drvdata->variant) { case IMX8MM: + reset_control_assert(imx8_phy->reset); + /* Tune PHY de-emphasis setting to pass PCIe compliance. */ if (imx8_phy->tx_deemph_gen1) writel(imx8_phy->tx_deemph_gen1, @@ -87,6 +89,8 @@ static int imx8_pcie_phy_power_on(struct phy *phy) writel(imx8_phy->tx_deemph_gen2, imx8_phy->base + PCIE_PHY_TRSV_REG6); break; + case IMX8MP: /* Do nothing. */ + break; } if (pad_mode == IMX8_PCIE_REFCLK_PAD_INPUT || @@ -141,6 +145,9 @@ static int imx8_pcie_phy_power_on(struct phy *phy) IMX8MM_GPR_PCIE_CMN_RST); switch (imx8_phy->drvdata->variant) { + case IMX8MP: + reset_control_deassert(imx8_phy->perst); + fallthrough; case IMX8MM: reset_control_deassert(imx8_phy->reset); usleep_range(200, 500); @@ -181,8 +188,14 @@ static const struct imx8_pcie_phy_drvdata imx8mm_drvdata = { .variant = IMX8MM, }; +static const struct imx8_pcie_phy_drvdata imx8mp_drvdata = { + .gpr = "fsl,imx8mp-iomuxc-gpr", + .variant = IMX8MP, +}; + static const struct of_device_id imx8_pcie_phy_of_match[] = { {.compatible = "fsl,imx8mm-pcie-phy", .data = &imx8mm_drvdata, }, + {.compatible = "fsl,imx8mp-pcie-phy", .data = &imx8mp_drvdata, }, { }, }; MODULE_DEVICE_TABLE(of, imx8_pcie_phy_of_match); @@ -238,6 +251,14 @@ static int imx8_pcie_phy_probe(struct platform_device *pdev) return PTR_ERR(imx8_phy->reset); } + if (imx8_phy->drvdata->variant == IMX8MP) { + imx8_phy->perst = + devm_reset_control_get_exclusive(dev, "perst"); + if (IS_ERR(imx8_phy->perst)) + dev_err_probe(dev, PTR_ERR(imx8_phy->perst), + "Failed to get PCIE PHY PERST control\n"); + } + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); imx8_phy->base = devm_ioremap_resource(dev, res); if (IS_ERR(imx8_phy->base))