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Date: Fri, 2 Sep 2022 09:02:15 +0000
From: Hongxing Zhu <hongxing.zhu@....com>
To: Lucas Stach <l.stach@...gutronix.de>,
"p.zabel@...gutronix.de" <p.zabel@...gutronix.de>,
"bhelgaas@...gle.com" <bhelgaas@...gle.com>,
"lorenzo.pieralisi@....com" <lorenzo.pieralisi@....com>,
"robh@...nel.org" <robh@...nel.org>,
"shawnguo@...nel.org" <shawnguo@...nel.org>,
"vkoul@...nel.org" <vkoul@...nel.org>,
"alexander.stein@...tq-group.com" <alexander.stein@...tq-group.com>,
"marex@...x.de" <marex@...x.de>,
"richard.leitner@...ux.dev" <richard.leitner@...ux.dev>
CC: "linux-phy@...ts.infradead.org" <linux-phy@...ts.infradead.org>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.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 v6 7/7] PCI: imx6: Add i.MX8MP PCIe support
> -----Original Message-----
> From: Lucas Stach <l.stach@...gutronix.de>
> Sent: 2022年9月2日 16:42
> To: Hongxing Zhu <hongxing.zhu@....com>; p.zabel@...gutronix.de;
> bhelgaas@...gle.com; lorenzo.pieralisi@....com; robh@...nel.org;
> shawnguo@...nel.org; vkoul@...nel.org; alexander.stein@...tq-group.com;
> marex@...x.de; richard.leitner@...ux.dev
> Cc: linux-phy@...ts.infradead.org; devicetree@...r.kernel.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 v6 7/7] PCI: imx6: Add i.MX8MP PCIe support
>
> Am Donnerstag, dem 01.09.2022 um 12:02 +0800 schrieb Richard Zhu:
> > Add i.MX8MP PCIe support.
> > To avoid codes duplication when find the syscon regmap, add the iomux
> > gpr syscon compatible into drvdata.
> >
> > Signed-off-by: Richard Zhu <hongxing.zhu@....com>
> > Tested-by: Marek Vasut <marex@...x.de>
> > Tested-by: Richard Leitner <richard.leitner@...data.com>
> > Tested-by: Alexander Stein <alexander.stein@...tq-group.com>
> > ---
> > drivers/pci/controller/dwc/pci-imx6.c | 27
> > +++++++++++++++++++++++++--
> > 1 file changed, 25 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/pci/controller/dwc/pci-imx6.c
> > b/drivers/pci/controller/dwc/pci-imx6.c
> > index 6e5debdbc55b..3018f9d1c1b8 100644
> > --- a/drivers/pci/controller/dwc/pci-imx6.c
> > +++ b/drivers/pci/controller/dwc/pci-imx6.c
> > @@ -51,6 +51,7 @@ enum imx6_pcie_variants {
> > IMX7D,
> > IMX8MQ,
> > IMX8MM,
> > + IMX8MP,
> > };
> >
> > #define IMX6_PCIE_FLAG_IMX6_PHY BIT(0)
> > @@ -61,6 +62,7 @@ struct imx6_pcie_drvdata {
> > enum imx6_pcie_variants variant;
> > u32 flags;
> > int dbi_length;
> > + char gpr[128];
>
> Same comment as with the PHY patch:
> const char *gpr;
>
> Otherwise looks good.
Okay, would be change to const char *gpr.
Thanks for your review.
Best Regards
Richard Zhu
>
> Regards,
> Lucas
>
> > };
> >
> > struct imx6_pcie {
> > @@ -150,7 +152,8 @@ struct imx6_pcie { static unsigned int
> > imx6_pcie_grp_offset(const struct imx6_pcie *imx6_pcie) {
> > WARN_ON(imx6_pcie->drvdata->variant != IMX8MQ &&
> > - imx6_pcie->drvdata->variant != IMX8MM);
> > + imx6_pcie->drvdata->variant != IMX8MM &&
> > + imx6_pcie->drvdata->variant != IMX8MP);
> > return imx6_pcie->controller_id == 1 ? IOMUXC_GPR16 : IOMUXC_GPR14;
> > }
> >
> > @@ -301,6 +304,7 @@ static void imx6_pcie_init_phy(struct imx6_pcie
> > *imx6_pcie) {
> > switch (imx6_pcie->drvdata->variant) {
> > case IMX8MM:
> > + case IMX8MP:
> > /*
> > * The PHY initialization had been done in the PHY
> > * driver, break here directly.
> > @@ -558,6 +562,7 @@ static int imx6_pcie_enable_ref_clk(struct imx6_pcie
> *imx6_pcie)
> > break;
> > case IMX8MM:
> > case IMX8MQ:
> > + case IMX8MP:
> > ret = clk_prepare_enable(imx6_pcie->pcie_aux);
> > if (ret) {
> > dev_err(dev, "unable to enable pcie_aux clock\n"); @@ -602,6
> > +607,7 @@ static void imx6_pcie_disable_ref_clk(struct imx6_pcie
> *imx6_pcie)
> > break;
> > case IMX8MM:
> > case IMX8MQ:
> > + case IMX8MP:
> > clk_disable_unprepare(imx6_pcie->pcie_aux);
> > break;
> > default:
> > @@ -669,6 +675,7 @@ static void imx6_pcie_assert_core_reset(struct
> imx6_pcie *imx6_pcie)
> > reset_control_assert(imx6_pcie->pciephy_reset);
> > fallthrough;
> > case IMX8MM:
> > + case IMX8MP:
> > reset_control_assert(imx6_pcie->apps_reset);
> > break;
> > case IMX6SX:
> > @@ -744,6 +751,7 @@ static int imx6_pcie_deassert_core_reset(struct
> imx6_pcie *imx6_pcie)
> > break;
> > case IMX6Q: /* Nothing to do */
> > case IMX8MM:
> > + case IMX8MP:
> > break;
> > }
> >
> > @@ -793,6 +801,7 @@ static void imx6_pcie_ltssm_enable(struct device
> *dev)
> > case IMX7D:
> > case IMX8MQ:
> > case IMX8MM:
> > + case IMX8MP:
> > reset_control_deassert(imx6_pcie->apps_reset);
> > break;
> > }
> > @@ -812,6 +821,7 @@ static void imx6_pcie_ltssm_disable(struct device
> *dev)
> > case IMX7D:
> > case IMX8MQ:
> > case IMX8MM:
> > + case IMX8MP:
> > reset_control_assert(imx6_pcie->apps_reset);
> > break;
> > }
> > @@ -1179,6 +1189,7 @@ static int imx6_pcie_probe(struct platform_device
> *pdev)
> > }
> > break;
> > case IMX8MM:
> > + case IMX8MP:
> > imx6_pcie->pcie_aux = devm_clk_get(dev, "pcie_aux");
> > if (IS_ERR(imx6_pcie->pcie_aux))
> > return dev_err_probe(dev, PTR_ERR(imx6_pcie->pcie_aux), @@
> -1216,7
> > +1227,7 @@ static int imx6_pcie_probe(struct platform_device *pdev)
> >
> > /* Grab GPR config register range */
> > imx6_pcie->iomuxc_gpr =
> > - syscon_regmap_lookup_by_compatible("fsl,imx6q-iomuxc-gpr");
> > + syscon_regmap_lookup_by_compatible(imx6_pcie->drvdata->gpr);
> > if (IS_ERR(imx6_pcie->iomuxc_gpr)) {
> > dev_err(dev, "unable to find iomuxc registers\n");
> > return PTR_ERR(imx6_pcie->iomuxc_gpr); @@ -1295,12 +1306,14
> @@
> > static const struct imx6_pcie_drvdata drvdata[] = {
> > .flags = IMX6_PCIE_FLAG_IMX6_PHY |
> > IMX6_PCIE_FLAG_IMX6_SPEED_CHANGE,
> > .dbi_length = 0x200,
> > + .gpr = "fsl,imx6q-iomuxc-gpr",
> > },
> > [IMX6SX] = {
> > .variant = IMX6SX,
> > .flags = IMX6_PCIE_FLAG_IMX6_PHY |
> > IMX6_PCIE_FLAG_IMX6_SPEED_CHANGE |
> > IMX6_PCIE_FLAG_SUPPORTS_SUSPEND,
> > + .gpr = "fsl,imx6q-iomuxc-gpr",
> > },
> > [IMX6QP] = {
> > .variant = IMX6QP,
> > @@ -1308,17 +1321,26 @@ static const struct imx6_pcie_drvdata drvdata[]
> = {
> > IMX6_PCIE_FLAG_IMX6_SPEED_CHANGE |
> > IMX6_PCIE_FLAG_SUPPORTS_SUSPEND,
> > .dbi_length = 0x200,
> > + .gpr = "fsl,imx6q-iomuxc-gpr",
> > },
> > [IMX7D] = {
> > .variant = IMX7D,
> > .flags = IMX6_PCIE_FLAG_SUPPORTS_SUSPEND,
> > + .gpr = "fsl,imx7d-iomuxc-gpr",
> > },
> > [IMX8MQ] = {
> > .variant = IMX8MQ,
> > + .gpr = "fsl,imx8mq-iomuxc-gpr",
> > },
> > [IMX8MM] = {
> > .variant = IMX8MM,
> > .flags = IMX6_PCIE_FLAG_SUPPORTS_SUSPEND,
> > + .gpr = "fsl,imx8mm-iomuxc-gpr",
> > + },
> > + [IMX8MP] = {
> > + .variant = IMX8MP,
> > + .flags = IMX6_PCIE_FLAG_SUPPORTS_SUSPEND,
> > + .gpr = "fsl,imx8mp-iomuxc-gpr",
> > },
> > };
> >
> > @@ -1329,6 +1351,7 @@ static const struct of_device_id
> imx6_pcie_of_match[] = {
> > { .compatible = "fsl,imx7d-pcie", .data = &drvdata[IMX7D], },
> > { .compatible = "fsl,imx8mq-pcie", .data = &drvdata[IMX8MQ], },
> > { .compatible = "fsl,imx8mm-pcie", .data = &drvdata[IMX8MM], },
> > + { .compatible = "fsl,imx8mp-pcie", .data = &drvdata[IMX8MP], },
> > {},
> > };
> >
>
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