| Message ID | 1661845564-11373-7-git-send-email-hongxing.zhu@nxp.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Add the iMX8MP PCIe support | expand |
Am Dienstag, dem 30.08.2022 um 15:46 +0800 schrieb Richard Zhu: > Add i.MX8MP PCIe PHY support. > > Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com> > Signed-off-by: Lucas Stach <l.stach@pengutronix.de> > Tested-by: Marek Vasut <marex@denx.de> > Tested-by: Richard Leitner <richard.leitner@skidata.com> > Tested-by: Alexander Stein <alexander.stein@ew.tq-group.com> > --- > drivers/phy/freescale/phy-fsl-imx8m-pcie.c | 137 +++++++++++++-------- > 1 file changed, 89 insertions(+), 48 deletions(-) > > diff --git a/drivers/phy/freescale/phy-fsl-imx8m-pcie.c b/drivers/phy/freescale/phy-fsl-imx8m-pcie.c > index ad7d2edfc414..c76e3a1a5f51 100644 > --- a/drivers/phy/freescale/phy-fsl-imx8m-pcie.c > +++ b/drivers/phy/freescale/phy-fsl-imx8m-pcie.c > @@ -11,6 +11,9 @@ > #include <linux/mfd/syscon.h> > #include <linux/mfd/syscon/imx7-iomuxc-gpr.h> > #include <linux/module.h> > +#include <linux/of_address.h> > +#include <linux/of_device.h> > +#include <linux/of_device.h> > #include <linux/phy/phy.h> > #include <linux/platform_device.h> > #include <linux/regmap.h> > @@ -31,12 +34,10 @@ > #define IMX8MM_PCIE_PHY_CMN_REG065 0x194 > #define ANA_AUX_RX_TERM (BIT(7) | BIT(4)) > #define ANA_AUX_TX_LVL GENMASK(3, 0) > -#define IMX8MM_PCIE_PHY_CMN_REG75 0x1D4 > -#define PCIE_PHY_CMN_REG75_PLL_DONE 0x3 > +#define IMX8MM_PCIE_PHY_CMN_REG075 0x1D4 > +#define ANA_PLL_DONE 0x3 > #define PCIE_PHY_TRSV_REG5 0x414 > -#define PCIE_PHY_TRSV_REG5_GEN1_DEEMP 0x2D > #define PCIE_PHY_TRSV_REG6 0x418 > -#define PCIE_PHY_TRSV_REG6_GEN2_DEEMP 0xF > > #define IMX8MM_GPR_PCIE_REF_CLK_SEL GENMASK(25, 24) > #define IMX8MM_GPR_PCIE_REF_CLK_PLL FIELD_PREP(IMX8MM_GPR_PCIE_REF_CLK_SEL, 0x3) > @@ -47,16 +48,23 @@ > #define IMX8MM_GPR_PCIE_SSC_EN BIT(16) > #define IMX8MM_GPR_PCIE_AUX_EN_OVERRIDE BIT(9) > > +enum imx8_pcie_phy_type { > + IMX8MM, > + IMX8MP, > +}; > + > struct imx8_pcie_phy { > void __iomem *base; > struct clk *clk; > struct phy *phy; > struct regmap *iomuxc_gpr; > struct reset_control *reset; > + struct reset_control *perst; > u32 refclk_pad_mode; > u32 tx_deemph_gen1; > u32 tx_deemph_gen2; > bool clkreq_unused; > + enum imx8_pcie_phy_type variant; > }; > > static int imx8_pcie_phy_init(struct phy *phy) > @@ -68,31 +76,20 @@ static int imx8_pcie_phy_init(struct phy *phy) > reset_control_assert(imx8_phy->reset); > > pad_mode = imx8_phy->refclk_pad_mode; > - /* Set AUX_EN_OVERRIDE 1'b0, when the CLKREQ# isn't hooked */ > - regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > - IMX8MM_GPR_PCIE_AUX_EN_OVERRIDE, > - imx8_phy->clkreq_unused ? > - 0 : IMX8MM_GPR_PCIE_AUX_EN_OVERRIDE); > - regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > - IMX8MM_GPR_PCIE_AUX_EN, > - IMX8MM_GPR_PCIE_AUX_EN); > - regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > - IMX8MM_GPR_PCIE_POWER_OFF, 0); > - regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > - IMX8MM_GPR_PCIE_SSC_EN, 0); > - > - regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > - IMX8MM_GPR_PCIE_REF_CLK_SEL, > - pad_mode == IMX8_PCIE_REFCLK_PAD_INPUT ? > - IMX8MM_GPR_PCIE_REF_CLK_EXT : > - IMX8MM_GPR_PCIE_REF_CLK_PLL); > - usleep_range(100, 200); > - > - /* Do the PHY common block reset */ > - regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > - IMX8MM_GPR_PCIE_CMN_RST, > - IMX8MM_GPR_PCIE_CMN_RST); > - usleep_range(200, 500); > + switch (imx8_phy->variant) { > + case IMX8MM: > + /* Tune PHY de-emphasis setting to pass PCIe compliance. */ > + if (imx8_phy->tx_deemph_gen1) > + writel(imx8_phy->tx_deemph_gen1, > + imx8_phy->base + PCIE_PHY_TRSV_REG5); > + if (imx8_phy->tx_deemph_gen2) > + writel(imx8_phy->tx_deemph_gen2, > + imx8_phy->base + PCIE_PHY_TRSV_REG6); > + break; > + case IMX8MP: > + reset_control_assert(imx8_phy->perst); > + break; > + } > > if (pad_mode == IMX8_PCIE_REFCLK_PAD_INPUT || > pad_mode == IMX8_PCIE_REFCLK_PAD_UNUSED) { > @@ -120,20 +117,44 @@ static int imx8_pcie_phy_init(struct phy *phy) > imx8_phy->base + IMX8MM_PCIE_PHY_CMN_REG065); > } > > - /* Tune PHY de-emphasis setting to pass PCIe compliance. */ > - if (imx8_phy->tx_deemph_gen1) > - writel(imx8_phy->tx_deemph_gen1, > - imx8_phy->base + PCIE_PHY_TRSV_REG5); > - if (imx8_phy->tx_deemph_gen2) > - writel(imx8_phy->tx_deemph_gen2, > - imx8_phy->base + PCIE_PHY_TRSV_REG6); > + /* Set AUX_EN_OVERRIDE 1'b0, when the CLKREQ# isn't hooked */ > + regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > + IMX8MM_GPR_PCIE_AUX_EN_OVERRIDE, > + imx8_phy->clkreq_unused ? > + 0 : IMX8MM_GPR_PCIE_AUX_EN_OVERRIDE); > + regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > + IMX8MM_GPR_PCIE_AUX_EN, > + IMX8MM_GPR_PCIE_AUX_EN); > + regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > + IMX8MM_GPR_PCIE_POWER_OFF, 0); > + regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > + IMX8MM_GPR_PCIE_SSC_EN, 0); > + > + regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > + IMX8MM_GPR_PCIE_REF_CLK_SEL, > + pad_mode == IMX8_PCIE_REFCLK_PAD_INPUT ? > + IMX8MM_GPR_PCIE_REF_CLK_EXT : > + IMX8MM_GPR_PCIE_REF_CLK_PLL); > + usleep_range(100, 200); > + > + /* Do the PHY common block reset */ > + regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > + IMX8MM_GPR_PCIE_CMN_RST, > + IMX8MM_GPR_PCIE_CMN_RST); > > - reset_control_deassert(imx8_phy->reset); > + switch (imx8_phy->variant) { > + case IMX8MP: > + reset_control_deassert(imx8_phy->perst); > + fallthrough; > + case IMX8MM: > + reset_control_deassert(imx8_phy->reset); > + usleep_range(200, 500); > + break; > + } > > /* Polling to check the phy is ready or not. */ > - ret = readl_poll_timeout(imx8_phy->base + IMX8MM_PCIE_PHY_CMN_REG75, > - val, val == PCIE_PHY_CMN_REG75_PLL_DONE, > - 10, 20000); > + ret = readl_poll_timeout(imx8_phy->base + IMX8MM_PCIE_PHY_CMN_REG075, > + val, val == ANA_PLL_DONE, 10, 20000); > return ret; > } > > @@ -160,6 +181,13 @@ static const struct phy_ops imx8_pcie_phy_ops = { > .owner = THIS_MODULE, > }; > > +static const struct of_device_id imx8_pcie_phy_of_match[] = { > + {.compatible = "fsl,imx8mm-pcie-phy", .data = (void *)IMX8MM}, > + {.compatible = "fsl,imx8mp-pcie-phy", .data = (void *)IMX8MP}, > + { }, > +}; > +MODULE_DEVICE_TABLE(of, imx8_pcie_phy_of_match); > + > static int imx8_pcie_phy_probe(struct platform_device *pdev) > { > struct phy_provider *phy_provider; > @@ -172,6 +200,9 @@ static int imx8_pcie_phy_probe(struct platform_device *pdev) > if (!imx8_phy) > return -ENOMEM; > > + imx8_phy->variant = > + (enum imx8_pcie_phy_type)of_device_get_match_data(dev); > + > /* get PHY refclk pad mode */ > of_property_read_u32(np, "fsl,refclk-pad-mode", > &imx8_phy->refclk_pad_mode); > @@ -196,8 +227,16 @@ static int imx8_pcie_phy_probe(struct platform_device *pdev) > } > > /* Grab GPR config register range */ > - imx8_phy->iomuxc_gpr = > - syscon_regmap_lookup_by_compatible("fsl,imx6q-iomuxc-gpr"); > + switch (imx8_phy->variant) { > + case IMX8MM: > + imx8_phy->iomuxc_gpr = > + syscon_regmap_lookup_by_compatible("fsl,imx8mm-iomuxc-gpr"); > + break; > + case IMX8MP: > + imx8_phy->iomuxc_gpr = > + syscon_regmap_lookup_by_compatible("fsl,imx8mp-iomuxc-gpr"); > + break; > + } Oh, I had a real phandle in DT in mind for this, but I see how this would be hard to introduce in a backward compatible manner for the 8MM. At least this way it is fully contained in the driver and doesn't leak into DT compatibles. Maybe we could make this a little nicer by just having an const array of iomux syscon compatibles indexed by imx8_phy->variant, to avoid the switch and the resulting code (almost-)duplication. Regards, Lucas > if (IS_ERR(imx8_phy->iomuxc_gpr)) { > dev_err(dev, "unable to find iomuxc registers\n"); > return PTR_ERR(imx8_phy->iomuxc_gpr); > @@ -208,6 +247,14 @@ static int imx8_pcie_phy_probe(struct platform_device *pdev) > dev_err(dev, "Failed to get PCIEPHY reset control\n"); > return PTR_ERR(imx8_phy->reset); > } > + if (imx8_phy->variant == IMX8MP) { > + imx8_phy->perst = > + devm_reset_control_get_exclusive(dev, "perst"); > + if (IS_ERR(imx8_phy->perst)) { > + dev_err(dev, "Failed to get PCIE PHY PERST control\n"); > + return PTR_ERR(imx8_phy->perst); > + } > + } > > res = platform_get_resource(pdev, IORESOURCE_MEM, 0); > imx8_phy->base = devm_ioremap_resource(dev, res); > @@ -225,12 +272,6 @@ static int imx8_pcie_phy_probe(struct platform_device *pdev) > return PTR_ERR_OR_ZERO(phy_provider); > } > > -static const struct of_device_id imx8_pcie_phy_of_match[] = { > - {.compatible = "fsl,imx8mm-pcie-phy",}, > - { }, > -}; > -MODULE_DEVICE_TABLE(of, imx8_pcie_phy_of_match); > - > static struct platform_driver imx8_pcie_phy_driver = { > .probe = imx8_pcie_phy_probe, > .driver = {
> -----Original Message----- > From: Lucas Stach <l.stach@pengutronix.de> > Sent: 2022年8月30日 21:07 > To: Hongxing Zhu <hongxing.zhu@nxp.com>; p.zabel@pengutronix.de; > bhelgaas@google.com; lorenzo.pieralisi@arm.com; robh@kernel.org; > shawnguo@kernel.org; vkoul@kernel.org; alexander.stein@ew.tq-group.com; > marex@denx.de; 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: [PATCH v5 6/7] phy: freescale: imx8m-pcie: Add iMX8MP PCIe PHY > support > > Am Dienstag, dem 30.08.2022 um 15:46 +0800 schrieb Richard Zhu: > > Add i.MX8MP PCIe PHY support. > > > > Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com> > > Signed-off-by: Lucas Stach <l.stach@pengutronix.de> > > Tested-by: Marek Vasut <marex@denx.de> > > Tested-by: Richard Leitner <richard.leitner@skidata.com> > > Tested-by: Alexander Stein <alexander.stein@ew.tq-group.com> > > --- > > drivers/phy/freescale/phy-fsl-imx8m-pcie.c | 137 > > +++++++++++++-------- > > 1 file changed, 89 insertions(+), 48 deletions(-) > > > > diff --git a/drivers/phy/freescale/phy-fsl-imx8m-pcie.c > > b/drivers/phy/freescale/phy-fsl-imx8m-pcie.c > > index ad7d2edfc414..c76e3a1a5f51 100644 > > --- a/drivers/phy/freescale/phy-fsl-imx8m-pcie.c > > +++ b/drivers/phy/freescale/phy-fsl-imx8m-pcie.c > > @@ -11,6 +11,9 @@ > > #include <linux/mfd/syscon.h> > > #include <linux/mfd/syscon/imx7-iomuxc-gpr.h> > > #include <linux/module.h> > > +#include <linux/of_address.h> > > +#include <linux/of_device.h> > > +#include <linux/of_device.h> > > #include <linux/phy/phy.h> > > #include <linux/platform_device.h> > > #include <linux/regmap.h> > > @@ -31,12 +34,10 @@ > > #define IMX8MM_PCIE_PHY_CMN_REG065 0x194 > > #define ANA_AUX_RX_TERM (BIT(7) | BIT(4)) > > #define ANA_AUX_TX_LVL GENMASK(3, 0) > > -#define IMX8MM_PCIE_PHY_CMN_REG75 0x1D4 > > -#define PCIE_PHY_CMN_REG75_PLL_DONE 0x3 > > +#define IMX8MM_PCIE_PHY_CMN_REG075 0x1D4 > > +#define ANA_PLL_DONE 0x3 > > #define PCIE_PHY_TRSV_REG5 0x414 > > -#define PCIE_PHY_TRSV_REG5_GEN1_DEEMP 0x2D > > #define PCIE_PHY_TRSV_REG6 0x418 > > -#define PCIE_PHY_TRSV_REG6_GEN2_DEEMP 0xF > > > > #define IMX8MM_GPR_PCIE_REF_CLK_SEL GENMASK(25, 24) > > #define IMX8MM_GPR_PCIE_REF_CLK_PLL > FIELD_PREP(IMX8MM_GPR_PCIE_REF_CLK_SEL, 0x3) > > @@ -47,16 +48,23 @@ > > #define IMX8MM_GPR_PCIE_SSC_EN BIT(16) > > #define IMX8MM_GPR_PCIE_AUX_EN_OVERRIDE BIT(9) > > > > +enum imx8_pcie_phy_type { > > + IMX8MM, > > + IMX8MP, > > +}; > > + > > struct imx8_pcie_phy { > > void __iomem *base; > > struct clk *clk; > > struct phy *phy; > > struct regmap *iomuxc_gpr; > > struct reset_control *reset; > > + struct reset_control *perst; > > u32 refclk_pad_mode; > > u32 tx_deemph_gen1; > > u32 tx_deemph_gen2; > > bool clkreq_unused; > > + enum imx8_pcie_phy_type variant; > > }; > > > > static int imx8_pcie_phy_init(struct phy *phy) @@ -68,31 +76,20 @@ > > static int imx8_pcie_phy_init(struct phy *phy) > > reset_control_assert(imx8_phy->reset); > > > > pad_mode = imx8_phy->refclk_pad_mode; > > - /* Set AUX_EN_OVERRIDE 1'b0, when the CLKREQ# isn't hooked */ > > - regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > > - IMX8MM_GPR_PCIE_AUX_EN_OVERRIDE, > > - imx8_phy->clkreq_unused ? > > - 0 : IMX8MM_GPR_PCIE_AUX_EN_OVERRIDE); > > - regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > > - IMX8MM_GPR_PCIE_AUX_EN, > > - IMX8MM_GPR_PCIE_AUX_EN); > > - regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > > - IMX8MM_GPR_PCIE_POWER_OFF, 0); > > - regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > > - IMX8MM_GPR_PCIE_SSC_EN, 0); > > - > > - regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > > - IMX8MM_GPR_PCIE_REF_CLK_SEL, > > - pad_mode == IMX8_PCIE_REFCLK_PAD_INPUT ? > > - IMX8MM_GPR_PCIE_REF_CLK_EXT : > > - IMX8MM_GPR_PCIE_REF_CLK_PLL); > > - usleep_range(100, 200); > > - > > - /* Do the PHY common block reset */ > > - regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > > - IMX8MM_GPR_PCIE_CMN_RST, > > - IMX8MM_GPR_PCIE_CMN_RST); > > - usleep_range(200, 500); > > + switch (imx8_phy->variant) { > > + case IMX8MM: > > + /* Tune PHY de-emphasis setting to pass PCIe compliance. */ > > + if (imx8_phy->tx_deemph_gen1) > > + writel(imx8_phy->tx_deemph_gen1, > > + imx8_phy->base + PCIE_PHY_TRSV_REG5); > > + if (imx8_phy->tx_deemph_gen2) > > + writel(imx8_phy->tx_deemph_gen2, > > + imx8_phy->base + PCIE_PHY_TRSV_REG6); > > + break; > > + case IMX8MP: > > + reset_control_assert(imx8_phy->perst); > > + break; > > + } > > > > if (pad_mode == IMX8_PCIE_REFCLK_PAD_INPUT || > > pad_mode == IMX8_PCIE_REFCLK_PAD_UNUSED) { @@ -120,20 > +117,44 @@ > > static int imx8_pcie_phy_init(struct phy *phy) > > imx8_phy->base + IMX8MM_PCIE_PHY_CMN_REG065); > > } > > > > - /* Tune PHY de-emphasis setting to pass PCIe compliance. */ > > - if (imx8_phy->tx_deemph_gen1) > > - writel(imx8_phy->tx_deemph_gen1, > > - imx8_phy->base + PCIE_PHY_TRSV_REG5); > > - if (imx8_phy->tx_deemph_gen2) > > - writel(imx8_phy->tx_deemph_gen2, > > - imx8_phy->base + PCIE_PHY_TRSV_REG6); > > + /* Set AUX_EN_OVERRIDE 1'b0, when the CLKREQ# isn't hooked */ > > + regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > > + IMX8MM_GPR_PCIE_AUX_EN_OVERRIDE, > > + imx8_phy->clkreq_unused ? > > + 0 : IMX8MM_GPR_PCIE_AUX_EN_OVERRIDE); > > + regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > > + IMX8MM_GPR_PCIE_AUX_EN, > > + IMX8MM_GPR_PCIE_AUX_EN); > > + regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > > + IMX8MM_GPR_PCIE_POWER_OFF, 0); > > + regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > > + IMX8MM_GPR_PCIE_SSC_EN, 0); > > + > > + regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > > + IMX8MM_GPR_PCIE_REF_CLK_SEL, > > + pad_mode == IMX8_PCIE_REFCLK_PAD_INPUT ? > > + IMX8MM_GPR_PCIE_REF_CLK_EXT : > > + IMX8MM_GPR_PCIE_REF_CLK_PLL); > > + usleep_range(100, 200); > > + > > + /* Do the PHY common block reset */ > > + regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > > + IMX8MM_GPR_PCIE_CMN_RST, > > + IMX8MM_GPR_PCIE_CMN_RST); > > > > - reset_control_deassert(imx8_phy->reset); > > + switch (imx8_phy->variant) { > > + case IMX8MP: > > + reset_control_deassert(imx8_phy->perst); > > + fallthrough; > > + case IMX8MM: > > + reset_control_deassert(imx8_phy->reset); > > + usleep_range(200, 500); > > + break; > > + } > > > > /* Polling to check the phy is ready or not. */ > > - ret = readl_poll_timeout(imx8_phy->base + > IMX8MM_PCIE_PHY_CMN_REG75, > > - val, val == PCIE_PHY_CMN_REG75_PLL_DONE, > > - 10, 20000); > > + ret = readl_poll_timeout(imx8_phy->base + > IMX8MM_PCIE_PHY_CMN_REG075, > > + val, val == ANA_PLL_DONE, 10, 20000); > > return ret; > > } > > > > @@ -160,6 +181,13 @@ static const struct phy_ops imx8_pcie_phy_ops = { > > .owner = THIS_MODULE, > > }; > > > > +static const struct of_device_id imx8_pcie_phy_of_match[] = { > > + {.compatible = "fsl,imx8mm-pcie-phy", .data = (void *)IMX8MM}, > > + {.compatible = "fsl,imx8mp-pcie-phy", .data = (void *)IMX8MP}, > > + { }, > > +}; > > +MODULE_DEVICE_TABLE(of, imx8_pcie_phy_of_match); > > + > > static int imx8_pcie_phy_probe(struct platform_device *pdev) { > > struct phy_provider *phy_provider; > > @@ -172,6 +200,9 @@ static int imx8_pcie_phy_probe(struct > platform_device *pdev) > > if (!imx8_phy) > > return -ENOMEM; > > > > + imx8_phy->variant = > > + (enum imx8_pcie_phy_type)of_device_get_match_data(dev); > > + > > /* get PHY refclk pad mode */ > > of_property_read_u32(np, "fsl,refclk-pad-mode", > > &imx8_phy->refclk_pad_mode); > > @@ -196,8 +227,16 @@ static int imx8_pcie_phy_probe(struct > platform_device *pdev) > > } > > > > /* Grab GPR config register range */ > > - imx8_phy->iomuxc_gpr = > > - syscon_regmap_lookup_by_compatible("fsl,imx6q-iomuxc-gpr"); > > + switch (imx8_phy->variant) { > > + case IMX8MM: > > + imx8_phy->iomuxc_gpr = > > + > syscon_regmap_lookup_by_compatible("fsl,imx8mm-iomuxc-gpr"); > > + break; > > + case IMX8MP: > > + imx8_phy->iomuxc_gpr = > > + > syscon_regmap_lookup_by_compatible("fsl,imx8mp-iomuxc-gpr"); > > + break; > > + } > > Oh, I had a real phandle in DT in mind for this, but I see how this would be > hard to introduce in a backward compatible manner for the 8MM. > At least this way it is fully contained in the driver and doesn't leak into DT > compatibles. > > Maybe we could make this a little nicer by just having an const array of iomux > syscon compatibles indexed by imx8_phy->variant, to avoid the switch and the > resulting code (almost-)duplication. > Hi Lucas: Thanks for your comments. Do you mean a drvdata struct indexed by variant, and contains the const array of iomux syscon compatible like below? +static const struct imx8_pcie_phy_drvdata drvdata[] = { + [IMX8MM] = { + .variant = IMX8MM, + .gpr = "fsl,imx8mm-iomuxc-gpr", + }, + + [IMX8MP] = { + .variant = IMX8MP, + .gpr = "fsl,imx8mp-iomuxc-gpr", + }, +}; + Then, we can get the drvdata, and find the according gpr syscon regmap below. + imx8_phy->drvdata = of_device_get_match_data(dev); ... + imx8_phy->iomuxc_gpr = + syscon_regmap_lookup_by_compatible(imx8_phy->drvdata->gpr); If yes, I would do the changes, and issue the v6 later. Best Regards Richard Zhu > Regards, > Lucas > > > if (IS_ERR(imx8_phy->iomuxc_gpr)) { > > dev_err(dev, "unable to find iomuxc registers\n"); > > return PTR_ERR(imx8_phy->iomuxc_gpr); @@ -208,6 +247,14 @@ > static > > int imx8_pcie_phy_probe(struct platform_device *pdev) > > dev_err(dev, "Failed to get PCIEPHY reset control\n"); > > return PTR_ERR(imx8_phy->reset); > > } > > + if (imx8_phy->variant == IMX8MP) { > > + imx8_phy->perst = > > + devm_reset_control_get_exclusive(dev, "perst"); > > + if (IS_ERR(imx8_phy->perst)) { > > + dev_err(dev, "Failed to get PCIE PHY PERST control\n"); > > + return PTR_ERR(imx8_phy->perst); > > + } > > + } > > > > res = platform_get_resource(pdev, IORESOURCE_MEM, 0); > > imx8_phy->base = devm_ioremap_resource(dev, res); @@ -225,12 +272,6 > > @@ static int imx8_pcie_phy_probe(struct platform_device *pdev) > > return PTR_ERR_OR_ZERO(phy_provider); } > > > > -static const struct of_device_id imx8_pcie_phy_of_match[] = { > > - {.compatible = "fsl,imx8mm-pcie-phy",}, > > - { }, > > -}; > > -MODULE_DEVICE_TABLE(of, imx8_pcie_phy_of_match); > > - > > static struct platform_driver imx8_pcie_phy_driver = { > > .probe = imx8_pcie_phy_probe, > > .driver = { >
Am Mittwoch, dem 31.08.2022 um 06:16 +0000 schrieb Hongxing Zhu: > > -----Original Message----- > > From: Lucas Stach <l.stach@pengutronix.de> > > Sent: 2022年8月30日 21:07 > > To: Hongxing Zhu <hongxing.zhu@nxp.com>; p.zabel@pengutronix.de; > > bhelgaas@google.com; lorenzo.pieralisi@arm.com; robh@kernel.org; > > shawnguo@kernel.org; vkoul@kernel.org; > > alexander.stein@ew.tq-group.com; > > marex@denx.de; 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: [PATCH v5 6/7] phy: freescale: imx8m-pcie: Add iMX8MP > > PCIe PHY > > support > > > > Am Dienstag, dem 30.08.2022 um 15:46 +0800 schrieb Richard Zhu: > > > Add i.MX8MP PCIe PHY support. > > > > > > Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com> > > > Signed-off-by: Lucas Stach <l.stach@pengutronix.de> > > > Tested-by: Marek Vasut <marex@denx.de> > > > Tested-by: Richard Leitner <richard.leitner@skidata.com> > > > Tested-by: Alexander Stein <alexander.stein@ew.tq-group.com> > > > --- > > > drivers/phy/freescale/phy-fsl-imx8m-pcie.c | 137 > > > +++++++++++++-------- > > > 1 file changed, 89 insertions(+), 48 deletions(-) > > > > > > diff --git a/drivers/phy/freescale/phy-fsl-imx8m-pcie.c > > > b/drivers/phy/freescale/phy-fsl-imx8m-pcie.c > > > index ad7d2edfc414..c76e3a1a5f51 100644 > > > --- a/drivers/phy/freescale/phy-fsl-imx8m-pcie.c > > > +++ b/drivers/phy/freescale/phy-fsl-imx8m-pcie.c > > > @@ -11,6 +11,9 @@ > > > #include <linux/mfd/syscon.h> > > > #include <linux/mfd/syscon/imx7-iomuxc-gpr.h> > > > #include <linux/module.h> > > > +#include <linux/of_address.h> > > > +#include <linux/of_device.h> > > > +#include <linux/of_device.h> > > > #include <linux/phy/phy.h> > > > #include <linux/platform_device.h> > > > #include <linux/regmap.h> > > > @@ -31,12 +34,10 @@ > > > #define IMX8MM_PCIE_PHY_CMN_REG065 0x194 > > > #define ANA_AUX_RX_TERM (BIT(7) | BIT(4)) > > > #define ANA_AUX_TX_LVL GENMASK(3, 0) > > > -#define IMX8MM_PCIE_PHY_CMN_REG75 0x1D4 > > > -#define PCIE_PHY_CMN_REG75_PLL_DONE 0x3 > > > +#define IMX8MM_PCIE_PHY_CMN_REG075 0x1D4 > > > +#define ANA_PLL_DONE 0x3 > > > #define PCIE_PHY_TRSV_REG5 0x414 > > > -#define PCIE_PHY_TRSV_REG5_GEN1_DEEMP 0x2D > > > #define PCIE_PHY_TRSV_REG6 0x418 > > > -#define PCIE_PHY_TRSV_REG6_GEN2_DEEMP 0xF > > > > > > #define IMX8MM_GPR_PCIE_REF_CLK_SEL GENMASK(25, 24) > > > #define IMX8MM_GPR_PCIE_REF_CLK_PLL > > FIELD_PREP(IMX8MM_GPR_PCIE_REF_CLK_SEL, 0x3) > > > @@ -47,16 +48,23 @@ > > > #define IMX8MM_GPR_PCIE_SSC_EN BIT(16) > > > #define IMX8MM_GPR_PCIE_AUX_EN_OVERRIDE BIT(9) > > > > > > +enum imx8_pcie_phy_type { > > > + IMX8MM, > > > + IMX8MP, > > > +}; > > > + > > > struct imx8_pcie_phy { > > > void __iomem *base; > > > struct clk *clk; > > > struct phy *phy; > > > struct regmap *iomuxc_gpr; > > > struct reset_control *reset; > > > + struct reset_control *perst; > > > u32 refclk_pad_mode; > > > u32 tx_deemph_gen1; > > > u32 tx_deemph_gen2; > > > bool clkreq_unused; > > > + enum imx8_pcie_phy_type variant; > > > }; > > > > > > static int imx8_pcie_phy_init(struct phy *phy) @@ -68,31 +76,20 > > > @@ > > > static int imx8_pcie_phy_init(struct phy *phy) > > > reset_control_assert(imx8_phy->reset); > > > > > > pad_mode = imx8_phy->refclk_pad_mode; > > > - /* Set AUX_EN_OVERRIDE 1'b0, when the CLKREQ# isn't > > > hooked */ > > > - regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > > > - IMX8MM_GPR_PCIE_AUX_EN_OVERRIDE, > > > - imx8_phy->clkreq_unused ? > > > - 0 : IMX8MM_GPR_PCIE_AUX_EN_OVERRIDE); > > > - regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > > > - IMX8MM_GPR_PCIE_AUX_EN, > > > - IMX8MM_GPR_PCIE_AUX_EN); > > > - regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > > > - IMX8MM_GPR_PCIE_POWER_OFF, 0); > > > - regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > > > - IMX8MM_GPR_PCIE_SSC_EN, 0); > > > - > > > - regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > > > - IMX8MM_GPR_PCIE_REF_CLK_SEL, > > > - pad_mode == > > > IMX8_PCIE_REFCLK_PAD_INPUT ? > > > - IMX8MM_GPR_PCIE_REF_CLK_EXT : > > > - IMX8MM_GPR_PCIE_REF_CLK_PLL); > > > - usleep_range(100, 200); > > > - > > > - /* Do the PHY common block reset */ > > > - regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > > > - IMX8MM_GPR_PCIE_CMN_RST, > > > - IMX8MM_GPR_PCIE_CMN_RST); > > > - usleep_range(200, 500); > > > + switch (imx8_phy->variant) { > > > + case IMX8MM: > > > + /* Tune PHY de-emphasis setting to pass PCIe > > > compliance. */ > > > + if (imx8_phy->tx_deemph_gen1) > > > + writel(imx8_phy->tx_deemph_gen1, > > > + imx8_phy->base + > > > PCIE_PHY_TRSV_REG5); > > > + if (imx8_phy->tx_deemph_gen2) > > > + writel(imx8_phy->tx_deemph_gen2, > > > + imx8_phy->base + > > > PCIE_PHY_TRSV_REG6); > > > + break; > > > + case IMX8MP: > > > + reset_control_assert(imx8_phy->perst); > > > + break; > > > + } > > > > > > if (pad_mode == IMX8_PCIE_REFCLK_PAD_INPUT || > > > pad_mode == IMX8_PCIE_REFCLK_PAD_UNUSED) { @@ - > > > 120,20 > > +117,44 @@ > > > static int imx8_pcie_phy_init(struct phy *phy) > > > imx8_phy->base + > > > IMX8MM_PCIE_PHY_CMN_REG065); > > > } > > > > > > - /* Tune PHY de-emphasis setting to pass PCIe compliance. > > > */ > > > - if (imx8_phy->tx_deemph_gen1) > > > - writel(imx8_phy->tx_deemph_gen1, > > > - imx8_phy->base + PCIE_PHY_TRSV_REG5); > > > - if (imx8_phy->tx_deemph_gen2) > > > - writel(imx8_phy->tx_deemph_gen2, > > > - imx8_phy->base + PCIE_PHY_TRSV_REG6); > > > + /* Set AUX_EN_OVERRIDE 1'b0, when the CLKREQ# isn't > > > hooked */ > > > + regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > > > + IMX8MM_GPR_PCIE_AUX_EN_OVERRIDE, > > > + imx8_phy->clkreq_unused ? > > > + 0 : IMX8MM_GPR_PCIE_AUX_EN_OVERRIDE); > > > + regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > > > + IMX8MM_GPR_PCIE_AUX_EN, > > > + IMX8MM_GPR_PCIE_AUX_EN); > > > + regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > > > + IMX8MM_GPR_PCIE_POWER_OFF, 0); > > > + regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > > > + IMX8MM_GPR_PCIE_SSC_EN, 0); > > > + > > > + regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > > > + IMX8MM_GPR_PCIE_REF_CLK_SEL, > > > + pad_mode == > > > IMX8_PCIE_REFCLK_PAD_INPUT ? > > > + IMX8MM_GPR_PCIE_REF_CLK_EXT : > > > + IMX8MM_GPR_PCIE_REF_CLK_PLL); > > > + usleep_range(100, 200); > > > + > > > + /* Do the PHY common block reset */ > > > + regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > > > + IMX8MM_GPR_PCIE_CMN_RST, > > > + IMX8MM_GPR_PCIE_CMN_RST); > > > > > > - reset_control_deassert(imx8_phy->reset); > > > + switch (imx8_phy->variant) { > > > + case IMX8MP: > > > + reset_control_deassert(imx8_phy->perst); > > > + fallthrough; > > > + case IMX8MM: > > > + reset_control_deassert(imx8_phy->reset); > > > + usleep_range(200, 500); > > > + break; > > > + } > > > > > > /* Polling to check the phy is ready or not. */ > > > - ret = readl_poll_timeout(imx8_phy->base + > > IMX8MM_PCIE_PHY_CMN_REG75, > > > - val, val == > > > PCIE_PHY_CMN_REG75_PLL_DONE, > > > - 10, 20000); > > > + ret = readl_poll_timeout(imx8_phy->base + > > IMX8MM_PCIE_PHY_CMN_REG075, > > > + val, val == ANA_PLL_DONE, 10, > > > 20000); > > > return ret; > > > } > > > > > > @@ -160,6 +181,13 @@ static const struct phy_ops > > > imx8_pcie_phy_ops = { > > > .owner = THIS_MODULE, > > > }; > > > > > > +static const struct of_device_id imx8_pcie_phy_of_match[] = { > > > + {.compatible = "fsl,imx8mm-pcie-phy", .data = (void > > > *)IMX8MM}, > > > + {.compatible = "fsl,imx8mp-pcie-phy", .data = (void > > > *)IMX8MP}, > > > + { }, > > > +}; > > > +MODULE_DEVICE_TABLE(of, imx8_pcie_phy_of_match); > > > + > > > static int imx8_pcie_phy_probe(struct platform_device *pdev) { > > > struct phy_provider *phy_provider; > > > @@ -172,6 +200,9 @@ static int imx8_pcie_phy_probe(struct > > platform_device *pdev) > > > if (!imx8_phy) > > > return -ENOMEM; > > > > > > + imx8_phy->variant = > > > + (enum > > > imx8_pcie_phy_type)of_device_get_match_data(dev); > > > + > > > /* get PHY refclk pad mode */ > > > of_property_read_u32(np, "fsl,refclk-pad-mode", > > > &imx8_phy->refclk_pad_mode); > > > @@ -196,8 +227,16 @@ static int imx8_pcie_phy_probe(struct > > platform_device *pdev) > > > } > > > > > > /* Grab GPR config register range */ > > > - imx8_phy->iomuxc_gpr = > > > - syscon_regmap_lookup_by_compatible("fsl,imx6q- > > > iomuxc-gpr"); > > > + switch (imx8_phy->variant) { > > > + case IMX8MM: > > > + imx8_phy->iomuxc_gpr = > > > + > > syscon_regmap_lookup_by_compatible("fsl,imx8mm-iomuxc-gpr"); > > > + break; > > > + case IMX8MP: > > > + imx8_phy->iomuxc_gpr = > > > + > > syscon_regmap_lookup_by_compatible("fsl,imx8mp-iomuxc-gpr"); > > > + break; > > > + } > > > > Oh, I had a real phandle in DT in mind for this, but I see how this > > would be > > hard to introduce in a backward compatible manner for the 8MM. > > At least this way it is fully contained in the driver and doesn't > > leak into DT > > compatibles. > > > > Maybe we could make this a little nicer by just having an const > > array of iomux > > syscon compatibles indexed by imx8_phy->variant, to avoid the > > switch and the > > resulting code (almost-)duplication. > > > Hi Lucas: > Thanks for your comments. > Do you mean a drvdata struct indexed by variant, and contains the > const array > of iomux syscon compatible like below? > > +static const struct imx8_pcie_phy_drvdata drvdata[] = { > + [IMX8MM] = { > + .variant = IMX8MM, > + .gpr = "fsl,imx8mm-iomuxc-gpr", > + }, > + > + [IMX8MP] = { > + .variant = IMX8MP, > + .gpr = "fsl,imx8mp-iomuxc-gpr", > + }, > +}; > + > > Then, we can get the drvdata, and find the according gpr syscon > regmap below. > > + imx8_phy->drvdata = of_device_get_match_data(dev); > ... > + imx8_phy->iomuxc_gpr = > + syscon_regmap_lookup_by_compatible(imx8_phy- > >drvdata->gpr); > I had a simple array of GPR compatible strings in mind, so we could lookup the compatible from the variant. But I think putting it directly in drvdata, like done in your suggestion above, looks even better. > If yes, I would do the changes, and issue the v6 later. Yep, please change as suggested above. Same comment applies to the next patch "PCI: imx6: Add iMX8MP PCIe support". Also in both patches the dot between i and MX in i.MX8MP is missing in the patch description subject line. Regards, Lucas
> -----Original Message----- > From: Lucas Stach <l.stach@pengutronix.de> > Sent: 2022年8月31日 16:34 > To: Hongxing Zhu <hongxing.zhu@nxp.com>; p.zabel@pengutronix.de; > bhelgaas@google.com; lorenzo.pieralisi@arm.com; robh@kernel.org; > shawnguo@kernel.org; vkoul@kernel.org; alexander.stein@ew.tq-group.com; > marex@denx.de; 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: [PATCH v5 6/7] phy: freescale: imx8m-pcie: Add iMX8MP PCIe PHY > support > > Am Mittwoch, dem 31.08.2022 um 06:16 +0000 schrieb Hongxing Zhu: > > > -----Original Message----- > > > From: Lucas Stach <l.stach@pengutronix.de> > > > Sent: 2022年8月30日 21:07 > > > To: Hongxing Zhu <hongxing.zhu@nxp.com>; p.zabel@pengutronix.de; > > > bhelgaas@google.com; lorenzo.pieralisi@arm.com; robh@kernel.org; > > > shawnguo@kernel.org; vkoul@kernel.org; > > > alexander.stein@ew.tq-group.com; marex@denx.de; > > > 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: [PATCH v5 6/7] phy: freescale: imx8m-pcie: Add iMX8MP > > > PCIe PHY support > > > > > > Am Dienstag, dem 30.08.2022 um 15:46 +0800 schrieb Richard Zhu: > > > > Add i.MX8MP PCIe PHY support. > > > > > > > > Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com> > > > > Signed-off-by: Lucas Stach <l.stach@pengutronix.de> > > > > Tested-by: Marek Vasut <marex@denx.de> > > > > Tested-by: Richard Leitner <richard.leitner@skidata.com> > > > > Tested-by: Alexander Stein <alexander.stein@ew.tq-group.com> > > > > --- > > > > drivers/phy/freescale/phy-fsl-imx8m-pcie.c | 137 > > > > +++++++++++++-------- > > > > 1 file changed, 89 insertions(+), 48 deletions(-) > > > > > > > > diff --git a/drivers/phy/freescale/phy-fsl-imx8m-pcie.c > > > > b/drivers/phy/freescale/phy-fsl-imx8m-pcie.c > > > > index ad7d2edfc414..c76e3a1a5f51 100644 > > > > --- a/drivers/phy/freescale/phy-fsl-imx8m-pcie.c > > > > +++ b/drivers/phy/freescale/phy-fsl-imx8m-pcie.c > > > > @@ -11,6 +11,9 @@ > > > > #include <linux/mfd/syscon.h> > > > > #include <linux/mfd/syscon/imx7-iomuxc-gpr.h> > > > > #include <linux/module.h> > > > > +#include <linux/of_address.h> > > > > +#include <linux/of_device.h> > > > > +#include <linux/of_device.h> > > > > #include <linux/phy/phy.h> > > > > #include <linux/platform_device.h> > > > > #include <linux/regmap.h> > > > > @@ -31,12 +34,10 @@ > > > > #define IMX8MM_PCIE_PHY_CMN_REG065 0x194 > > > > #define ANA_AUX_RX_TERM (BIT(7) | BIT(4)) > > > > #define ANA_AUX_TX_LVL GENMASK(3, 0) > > > > -#define IMX8MM_PCIE_PHY_CMN_REG75 0x1D4 > > > > -#define PCIE_PHY_CMN_REG75_PLL_DONE 0x3 > > > > +#define IMX8MM_PCIE_PHY_CMN_REG075 0x1D4 > > > > +#define ANA_PLL_DONE 0x3 > > > > #define PCIE_PHY_TRSV_REG5 0x414 > > > > -#define PCIE_PHY_TRSV_REG5_GEN1_DEEMP 0x2D > > > > #define PCIE_PHY_TRSV_REG6 0x418 > > > > -#define PCIE_PHY_TRSV_REG6_GEN2_DEEMP 0xF > > > > > > > > #define IMX8MM_GPR_PCIE_REF_CLK_SEL GENMASK(25, 24) > > > > #define IMX8MM_GPR_PCIE_REF_CLK_PLL > > > FIELD_PREP(IMX8MM_GPR_PCIE_REF_CLK_SEL, 0x3) > > > > @@ -47,16 +48,23 @@ > > > > #define IMX8MM_GPR_PCIE_SSC_EN BIT(16) > > > > #define IMX8MM_GPR_PCIE_AUX_EN_OVERRIDE BIT(9) > > > > > > > > +enum imx8_pcie_phy_type { > > > > + IMX8MM, > > > > + IMX8MP, > > > > +}; > > > > + > > > > struct imx8_pcie_phy { > > > > void __iomem *base; > > > > struct clk *clk; > > > > struct phy *phy; > > > > struct regmap *iomuxc_gpr; > > > > struct reset_control *reset; > > > > + struct reset_control *perst; > > > > u32 refclk_pad_mode; > > > > u32 tx_deemph_gen1; > > > > u32 tx_deemph_gen2; > > > > bool clkreq_unused; > > > > + enum imx8_pcie_phy_type variant; > > > > }; > > > > > > > > static int imx8_pcie_phy_init(struct phy *phy) @@ -68,31 +76,20 > > > > @@ static int imx8_pcie_phy_init(struct phy *phy) > > > > reset_control_assert(imx8_phy->reset); > > > > > > > > pad_mode = imx8_phy->refclk_pad_mode; > > > > - /* Set AUX_EN_OVERRIDE 1'b0, when the CLKREQ# isn't > > > > hooked */ > > > > - regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > > > > - IMX8MM_GPR_PCIE_AUX_EN_OVERRIDE, > > > > - imx8_phy->clkreq_unused ? > > > > - 0 : IMX8MM_GPR_PCIE_AUX_EN_OVERRIDE); > > > > - regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > > > > - IMX8MM_GPR_PCIE_AUX_EN, > > > > - IMX8MM_GPR_PCIE_AUX_EN); > > > > - regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > > > > - IMX8MM_GPR_PCIE_POWER_OFF, 0); > > > > - regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > > > > - IMX8MM_GPR_PCIE_SSC_EN, 0); > > > > - > > > > - regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > > > > - IMX8MM_GPR_PCIE_REF_CLK_SEL, > > > > - pad_mode == > > > > IMX8_PCIE_REFCLK_PAD_INPUT ? > > > > - IMX8MM_GPR_PCIE_REF_CLK_EXT : > > > > - IMX8MM_GPR_PCIE_REF_CLK_PLL); > > > > - usleep_range(100, 200); > > > > - > > > > - /* Do the PHY common block reset */ > > > > - regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > > > > - IMX8MM_GPR_PCIE_CMN_RST, > > > > - IMX8MM_GPR_PCIE_CMN_RST); > > > > - usleep_range(200, 500); > > > > + switch (imx8_phy->variant) { > > > > + case IMX8MM: > > > > + /* Tune PHY de-emphasis setting to pass PCIe > > > > compliance. */ > > > > + if (imx8_phy->tx_deemph_gen1) > > > > + writel(imx8_phy->tx_deemph_gen1, > > > > + imx8_phy->base + > > > > PCIE_PHY_TRSV_REG5); > > > > + if (imx8_phy->tx_deemph_gen2) > > > > + writel(imx8_phy->tx_deemph_gen2, > > > > + imx8_phy->base + > > > > PCIE_PHY_TRSV_REG6); > > > > + break; > > > > + case IMX8MP: > > > > + reset_control_assert(imx8_phy->perst); > > > > + break; > > > > + } > > > > > > > > if (pad_mode == IMX8_PCIE_REFCLK_PAD_INPUT || > > > > pad_mode == IMX8_PCIE_REFCLK_PAD_UNUSED) { @@ - > > > > 120,20 > > > +117,44 @@ > > > > static int imx8_pcie_phy_init(struct phy *phy) > > > > imx8_phy->base + > > > > IMX8MM_PCIE_PHY_CMN_REG065); > > > > } > > > > > > > > - /* Tune PHY de-emphasis setting to pass PCIe compliance. > > > > */ > > > > - if (imx8_phy->tx_deemph_gen1) > > > > - writel(imx8_phy->tx_deemph_gen1, > > > > - imx8_phy->base + PCIE_PHY_TRSV_REG5); > > > > - if (imx8_phy->tx_deemph_gen2) > > > > - writel(imx8_phy->tx_deemph_gen2, > > > > - imx8_phy->base + PCIE_PHY_TRSV_REG6); > > > > + /* Set AUX_EN_OVERRIDE 1'b0, when the CLKREQ# isn't > > > > hooked */ > > > > + regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > > > > + IMX8MM_GPR_PCIE_AUX_EN_OVERRIDE, > > > > + imx8_phy->clkreq_unused ? > > > > + 0 : IMX8MM_GPR_PCIE_AUX_EN_OVERRIDE); > > > > + regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > > > > + IMX8MM_GPR_PCIE_AUX_EN, > > > > + IMX8MM_GPR_PCIE_AUX_EN); > > > > + regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > > > > + IMX8MM_GPR_PCIE_POWER_OFF, 0); > > > > + regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > > > > + IMX8MM_GPR_PCIE_SSC_EN, 0); > > > > + > > > > + regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > > > > + IMX8MM_GPR_PCIE_REF_CLK_SEL, > > > > + pad_mode == > > > > IMX8_PCIE_REFCLK_PAD_INPUT ? > > > > + IMX8MM_GPR_PCIE_REF_CLK_EXT : > > > > + IMX8MM_GPR_PCIE_REF_CLK_PLL); > > > > + usleep_range(100, 200); > > > > + > > > > + /* Do the PHY common block reset */ > > > > + regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, > > > > + IMX8MM_GPR_PCIE_CMN_RST, > > > > + IMX8MM_GPR_PCIE_CMN_RST); > > > > > > > > - reset_control_deassert(imx8_phy->reset); > > > > + switch (imx8_phy->variant) { > > > > + case IMX8MP: > > > > + reset_control_deassert(imx8_phy->perst); > > > > + fallthrough; > > > > + case IMX8MM: > > > > + reset_control_deassert(imx8_phy->reset); > > > > + usleep_range(200, 500); > > > > + break; > > > > + } > > > > > > > > /* Polling to check the phy is ready or not. */ > > > > - ret = readl_poll_timeout(imx8_phy->base + > > > IMX8MM_PCIE_PHY_CMN_REG75, > > > > - val, val == > > > > PCIE_PHY_CMN_REG75_PLL_DONE, > > > > - 10, 20000); > > > > + ret = readl_poll_timeout(imx8_phy->base + > > > IMX8MM_PCIE_PHY_CMN_REG075, > > > > + val, val == ANA_PLL_DONE, 10, > > > > 20000); > > > > return ret; > > > > } > > > > > > > > @@ -160,6 +181,13 @@ static const struct phy_ops imx8_pcie_phy_ops > > > > = { > > > > .owner = THIS_MODULE, > > > > }; > > > > > > > > +static const struct of_device_id imx8_pcie_phy_of_match[] = { > > > > + {.compatible = "fsl,imx8mm-pcie-phy", .data = (void > > > > *)IMX8MM}, > > > > + {.compatible = "fsl,imx8mp-pcie-phy", .data = (void > > > > *)IMX8MP}, > > > > + { }, > > > > +}; > > > > +MODULE_DEVICE_TABLE(of, imx8_pcie_phy_of_match); > > > > + > > > > static int imx8_pcie_phy_probe(struct platform_device *pdev) { > > > > struct phy_provider *phy_provider; @@ -172,6 +200,9 @@ static > > > > int imx8_pcie_phy_probe(struct > > > platform_device *pdev) > > > > if (!imx8_phy) > > > > return -ENOMEM; > > > > > > > > + imx8_phy->variant = > > > > + (enum > > > > imx8_pcie_phy_type)of_device_get_match_data(dev); > > > > + > > > > /* get PHY refclk pad mode */ > > > > of_property_read_u32(np, "fsl,refclk-pad-mode", > > > > &imx8_phy->refclk_pad_mode); @@ -196,8 +227,16 > @@ static > > > > int imx8_pcie_phy_probe(struct > > > platform_device *pdev) > > > > } > > > > > > > > /* Grab GPR config register range */ > > > > - imx8_phy->iomuxc_gpr = > > > > - syscon_regmap_lookup_by_compatible("fsl,imx6q- > > > > iomuxc-gpr"); > > > > + switch (imx8_phy->variant) { > > > > + case IMX8MM: > > > > + imx8_phy->iomuxc_gpr = > > > > + > > > syscon_regmap_lookup_by_compatible("fsl,imx8mm-iomuxc-gpr"); > > > > + break; > > > > + case IMX8MP: > > > > + imx8_phy->iomuxc_gpr = > > > > + > > > syscon_regmap_lookup_by_compatible("fsl,imx8mp-iomuxc-gpr"); > > > > + break; > > > > + } > > > > > > Oh, I had a real phandle in DT in mind for this, but I see how this > > > would be hard to introduce in a backward compatible manner for the > > > 8MM. > > > At least this way it is fully contained in the driver and doesn't > > > leak into DT compatibles. > > > > > > Maybe we could make this a little nicer by just having an const > > > array of iomux syscon compatibles indexed by imx8_phy->variant, to > > > avoid the switch and the resulting code (almost-)duplication. > > > > > Hi Lucas: > > Thanks for your comments. > > Do you mean a drvdata struct indexed by variant, and contains the > > const array of iomux syscon compatible like below? > > > > +static const struct imx8_pcie_phy_drvdata drvdata[] = { > > + [IMX8MM] = { > > + .variant = IMX8MM, > > + .gpr = "fsl,imx8mm-iomuxc-gpr", > > + }, > > + > > + [IMX8MP] = { > > + .variant = IMX8MP, > > + .gpr = "fsl,imx8mp-iomuxc-gpr", > > + }, > > +}; > > + > > > > Then, we can get the drvdata, and find the according gpr syscon regmap > > below. > > > > + imx8_phy->drvdata = of_device_get_match_data(dev); > > ... > > + imx8_phy->iomuxc_gpr = > > + syscon_regmap_lookup_by_compatible(imx8_phy- > > >drvdata->gpr); > > > I had a simple array of GPR compatible strings in mind, so we could lookup the > compatible from the variant. But I think putting it directly in drvdata, like done > in your suggestion above, looks even better. > > > If yes, I would do the changes, and issue the v6 later. > > Yep, please change as suggested above. Same comment applies to the next > patch "PCI: imx6: Add iMX8MP PCIe support". > > Also in both patches the dot between i and MX in i.MX8MP is missing in the > patch description subject line. Okay, thanks. Best Regards Richard Zhu > > Regards, > Lucas
diff --git a/drivers/phy/freescale/phy-fsl-imx8m-pcie.c b/drivers/phy/freescale/phy-fsl-imx8m-pcie.c index ad7d2edfc414..c76e3a1a5f51 100644 --- a/drivers/phy/freescale/phy-fsl-imx8m-pcie.c +++ b/drivers/phy/freescale/phy-fsl-imx8m-pcie.c @@ -11,6 +11,9 @@ #include <linux/mfd/syscon.h> #include <linux/mfd/syscon/imx7-iomuxc-gpr.h> #include <linux/module.h> +#include <linux/of_address.h> +#include <linux/of_device.h> +#include <linux/of_device.h> #include <linux/phy/phy.h> #include <linux/platform_device.h> #include <linux/regmap.h> @@ -31,12 +34,10 @@ #define IMX8MM_PCIE_PHY_CMN_REG065 0x194 #define ANA_AUX_RX_TERM (BIT(7) | BIT(4)) #define ANA_AUX_TX_LVL GENMASK(3, 0) -#define IMX8MM_PCIE_PHY_CMN_REG75 0x1D4 -#define PCIE_PHY_CMN_REG75_PLL_DONE 0x3 +#define IMX8MM_PCIE_PHY_CMN_REG075 0x1D4 +#define ANA_PLL_DONE 0x3 #define PCIE_PHY_TRSV_REG5 0x414 -#define PCIE_PHY_TRSV_REG5_GEN1_DEEMP 0x2D #define PCIE_PHY_TRSV_REG6 0x418 -#define PCIE_PHY_TRSV_REG6_GEN2_DEEMP 0xF #define IMX8MM_GPR_PCIE_REF_CLK_SEL GENMASK(25, 24) #define IMX8MM_GPR_PCIE_REF_CLK_PLL FIELD_PREP(IMX8MM_GPR_PCIE_REF_CLK_SEL, 0x3) @@ -47,16 +48,23 @@ #define IMX8MM_GPR_PCIE_SSC_EN BIT(16) #define IMX8MM_GPR_PCIE_AUX_EN_OVERRIDE BIT(9) +enum imx8_pcie_phy_type { + IMX8MM, + IMX8MP, +}; + struct imx8_pcie_phy { void __iomem *base; struct clk *clk; struct phy *phy; struct regmap *iomuxc_gpr; struct reset_control *reset; + struct reset_control *perst; u32 refclk_pad_mode; u32 tx_deemph_gen1; u32 tx_deemph_gen2; bool clkreq_unused; + enum imx8_pcie_phy_type variant; }; static int imx8_pcie_phy_init(struct phy *phy) @@ -68,31 +76,20 @@ static int imx8_pcie_phy_init(struct phy *phy) reset_control_assert(imx8_phy->reset); pad_mode = imx8_phy->refclk_pad_mode; - /* Set AUX_EN_OVERRIDE 1'b0, when the CLKREQ# isn't hooked */ - regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, - IMX8MM_GPR_PCIE_AUX_EN_OVERRIDE, - imx8_phy->clkreq_unused ? - 0 : IMX8MM_GPR_PCIE_AUX_EN_OVERRIDE); - regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, - IMX8MM_GPR_PCIE_AUX_EN, - IMX8MM_GPR_PCIE_AUX_EN); - regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, - IMX8MM_GPR_PCIE_POWER_OFF, 0); - regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, - IMX8MM_GPR_PCIE_SSC_EN, 0); - - regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, - IMX8MM_GPR_PCIE_REF_CLK_SEL, - pad_mode == IMX8_PCIE_REFCLK_PAD_INPUT ? - IMX8MM_GPR_PCIE_REF_CLK_EXT : - IMX8MM_GPR_PCIE_REF_CLK_PLL); - usleep_range(100, 200); - - /* Do the PHY common block reset */ - regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, - IMX8MM_GPR_PCIE_CMN_RST, - IMX8MM_GPR_PCIE_CMN_RST); - usleep_range(200, 500); + switch (imx8_phy->variant) { + case IMX8MM: + /* Tune PHY de-emphasis setting to pass PCIe compliance. */ + if (imx8_phy->tx_deemph_gen1) + writel(imx8_phy->tx_deemph_gen1, + imx8_phy->base + PCIE_PHY_TRSV_REG5); + if (imx8_phy->tx_deemph_gen2) + writel(imx8_phy->tx_deemph_gen2, + imx8_phy->base + PCIE_PHY_TRSV_REG6); + break; + case IMX8MP: + reset_control_assert(imx8_phy->perst); + break; + } if (pad_mode == IMX8_PCIE_REFCLK_PAD_INPUT || pad_mode == IMX8_PCIE_REFCLK_PAD_UNUSED) { @@ -120,20 +117,44 @@ static int imx8_pcie_phy_init(struct phy *phy) imx8_phy->base + IMX8MM_PCIE_PHY_CMN_REG065); } - /* Tune PHY de-emphasis setting to pass PCIe compliance. */ - if (imx8_phy->tx_deemph_gen1) - writel(imx8_phy->tx_deemph_gen1, - imx8_phy->base + PCIE_PHY_TRSV_REG5); - if (imx8_phy->tx_deemph_gen2) - writel(imx8_phy->tx_deemph_gen2, - imx8_phy->base + PCIE_PHY_TRSV_REG6); + /* Set AUX_EN_OVERRIDE 1'b0, when the CLKREQ# isn't hooked */ + regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, + IMX8MM_GPR_PCIE_AUX_EN_OVERRIDE, + imx8_phy->clkreq_unused ? + 0 : IMX8MM_GPR_PCIE_AUX_EN_OVERRIDE); + regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, + IMX8MM_GPR_PCIE_AUX_EN, + IMX8MM_GPR_PCIE_AUX_EN); + regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, + IMX8MM_GPR_PCIE_POWER_OFF, 0); + regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, + IMX8MM_GPR_PCIE_SSC_EN, 0); + + regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, + IMX8MM_GPR_PCIE_REF_CLK_SEL, + pad_mode == IMX8_PCIE_REFCLK_PAD_INPUT ? + IMX8MM_GPR_PCIE_REF_CLK_EXT : + IMX8MM_GPR_PCIE_REF_CLK_PLL); + usleep_range(100, 200); + + /* Do the PHY common block reset */ + regmap_update_bits(imx8_phy->iomuxc_gpr, IOMUXC_GPR14, + IMX8MM_GPR_PCIE_CMN_RST, + IMX8MM_GPR_PCIE_CMN_RST); - reset_control_deassert(imx8_phy->reset); + switch (imx8_phy->variant) { + case IMX8MP: + reset_control_deassert(imx8_phy->perst); + fallthrough; + case IMX8MM: + reset_control_deassert(imx8_phy->reset); + usleep_range(200, 500); + break; + } /* Polling to check the phy is ready or not. */ - ret = readl_poll_timeout(imx8_phy->base + IMX8MM_PCIE_PHY_CMN_REG75, - val, val == PCIE_PHY_CMN_REG75_PLL_DONE, - 10, 20000); + ret = readl_poll_timeout(imx8_phy->base + IMX8MM_PCIE_PHY_CMN_REG075, + val, val == ANA_PLL_DONE, 10, 20000); return ret; } @@ -160,6 +181,13 @@ static const struct phy_ops imx8_pcie_phy_ops = { .owner = THIS_MODULE, }; +static const struct of_device_id imx8_pcie_phy_of_match[] = { + {.compatible = "fsl,imx8mm-pcie-phy", .data = (void *)IMX8MM}, + {.compatible = "fsl,imx8mp-pcie-phy", .data = (void *)IMX8MP}, + { }, +}; +MODULE_DEVICE_TABLE(of, imx8_pcie_phy_of_match); + static int imx8_pcie_phy_probe(struct platform_device *pdev) { struct phy_provider *phy_provider; @@ -172,6 +200,9 @@ static int imx8_pcie_phy_probe(struct platform_device *pdev) if (!imx8_phy) return -ENOMEM; + imx8_phy->variant = + (enum imx8_pcie_phy_type)of_device_get_match_data(dev); + /* get PHY refclk pad mode */ of_property_read_u32(np, "fsl,refclk-pad-mode", &imx8_phy->refclk_pad_mode); @@ -196,8 +227,16 @@ static int imx8_pcie_phy_probe(struct platform_device *pdev) } /* Grab GPR config register range */ - imx8_phy->iomuxc_gpr = - syscon_regmap_lookup_by_compatible("fsl,imx6q-iomuxc-gpr"); + switch (imx8_phy->variant) { + case IMX8MM: + imx8_phy->iomuxc_gpr = + syscon_regmap_lookup_by_compatible("fsl,imx8mm-iomuxc-gpr"); + break; + case IMX8MP: + imx8_phy->iomuxc_gpr = + syscon_regmap_lookup_by_compatible("fsl,imx8mp-iomuxc-gpr"); + break; + } if (IS_ERR(imx8_phy->iomuxc_gpr)) { dev_err(dev, "unable to find iomuxc registers\n"); return PTR_ERR(imx8_phy->iomuxc_gpr); @@ -208,6 +247,14 @@ static int imx8_pcie_phy_probe(struct platform_device *pdev) dev_err(dev, "Failed to get PCIEPHY reset control\n"); return PTR_ERR(imx8_phy->reset); } + if (imx8_phy->variant == IMX8MP) { + imx8_phy->perst = + devm_reset_control_get_exclusive(dev, "perst"); + if (IS_ERR(imx8_phy->perst)) { + dev_err(dev, "Failed to get PCIE PHY PERST control\n"); + return PTR_ERR(imx8_phy->perst); + } + } res = platform_get_resource(pdev, IORESOURCE_MEM, 0); imx8_phy->base = devm_ioremap_resource(dev, res); @@ -225,12 +272,6 @@ static int imx8_pcie_phy_probe(struct platform_device *pdev) return PTR_ERR_OR_ZERO(phy_provider); } -static const struct of_device_id imx8_pcie_phy_of_match[] = { - {.compatible = "fsl,imx8mm-pcie-phy",}, - { }, -}; -MODULE_DEVICE_TABLE(of, imx8_pcie_phy_of_match); - static struct platform_driver imx8_pcie_phy_driver = { .probe = imx8_pcie_phy_probe, .driver = {