| Message ID | 20220615231551.1054753-4-helgaas@kernel.org |
|---|---|
| State | New |
| Headers | show |
| Series | PCI: imx6: refine codes and add the error propagation | expand |
> -----Original Message----- > From: Bjorn Helgaas <helgaas@kernel.org> > Sent: 2022年6月16日 7:16 > To: Hongxing Zhu <hongxing.zhu@nxp.com>; Lucas Stach > <l.stach@pengutronix.de>; Rob Herring <robh+dt@kernel.org>; Mark Brown > <broonie@kernel.org>; Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>; Fabio > Estevam <festevam@gmail.com>; Francesco Dolcini > <francesco.dolcini@toradex.com> > Cc: 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>; Bjorn Helgaas <bhelgaas@google.com> > Subject: [PATCH v12 03/13] PCI: imx6: Move imx6_pcie_enable_ref_clk() > earlier > > From: Bjorn Helgaas <bhelgaas@google.com> > > Move imx6_pcie_enable_ref_clk() earlier so it's not in the middle between > imx6_pcie_assert_core_reset() and imx6_pcie_deassert_core_reset(). No > functional change intended. > > Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Richard Zhu <hongxing.zhu@nxp.com> Best Regards Richard Zhu > --- > drivers/pci/controller/dwc/pci-imx6.c | 96 +++++++++++++-------------- > 1 file changed, 48 insertions(+), 48 deletions(-) > > diff --git a/drivers/pci/controller/dwc/pci-imx6.c > b/drivers/pci/controller/dwc/pci-imx6.c > index e63eb6380020..a6d2b907d42b 100644 > --- a/drivers/pci/controller/dwc/pci-imx6.c > +++ b/drivers/pci/controller/dwc/pci-imx6.c > @@ -520,54 +520,6 @@ static int imx6_pcie_attach_pd(struct device *dev) > return 0; > } > > -static void imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie) -{ > - struct device *dev = imx6_pcie->pci->dev; > - > - switch (imx6_pcie->drvdata->variant) { > - case IMX7D: > - case IMX8MQ: > - reset_control_assert(imx6_pcie->pciephy_reset); > - fallthrough; > - case IMX8MM: > - reset_control_assert(imx6_pcie->apps_reset); > - break; > - case IMX6SX: > - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, > - IMX6SX_GPR12_PCIE_TEST_POWERDOWN, > - IMX6SX_GPR12_PCIE_TEST_POWERDOWN); > - /* Force PCIe PHY reset */ > - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR5, > - IMX6SX_GPR5_PCIE_BTNRST_RESET, > - IMX6SX_GPR5_PCIE_BTNRST_RESET); > - break; > - case IMX6QP: > - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, > - IMX6Q_GPR1_PCIE_SW_RST, > - IMX6Q_GPR1_PCIE_SW_RST); > - break; > - case IMX6Q: > - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, > - IMX6Q_GPR1_PCIE_TEST_PD, 1 << 18); > - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, > - IMX6Q_GPR1_PCIE_REF_CLK_EN, 0 << 16); > - break; > - } > - > - if (imx6_pcie->vpcie && regulator_is_enabled(imx6_pcie->vpcie) > 0) { > - int ret = regulator_disable(imx6_pcie->vpcie); > - > - if (ret) > - dev_err(dev, "failed to disable vpcie regulator: %d\n", > - ret); > - } > - > - /* Some boards don't have PCIe reset GPIO. */ > - if (gpio_is_valid(imx6_pcie->reset_gpio)) > - gpio_set_value_cansleep(imx6_pcie->reset_gpio, > - imx6_pcie->gpio_active_high); > -} > - > static int imx6_pcie_enable_ref_clk(struct imx6_pcie *imx6_pcie) { > struct dw_pcie *pci = imx6_pcie->pci; > @@ -628,6 +580,54 @@ static int imx6_pcie_enable_ref_clk(struct imx6_pcie > *imx6_pcie) > return ret; > } > > +static void imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie) { > + struct device *dev = imx6_pcie->pci->dev; > + > + switch (imx6_pcie->drvdata->variant) { > + case IMX7D: > + case IMX8MQ: > + reset_control_assert(imx6_pcie->pciephy_reset); > + fallthrough; > + case IMX8MM: > + reset_control_assert(imx6_pcie->apps_reset); > + break; > + case IMX6SX: > + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, > + IMX6SX_GPR12_PCIE_TEST_POWERDOWN, > + IMX6SX_GPR12_PCIE_TEST_POWERDOWN); > + /* Force PCIe PHY reset */ > + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR5, > + IMX6SX_GPR5_PCIE_BTNRST_RESET, > + IMX6SX_GPR5_PCIE_BTNRST_RESET); > + break; > + case IMX6QP: > + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, > + IMX6Q_GPR1_PCIE_SW_RST, > + IMX6Q_GPR1_PCIE_SW_RST); > + break; > + case IMX6Q: > + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, > + IMX6Q_GPR1_PCIE_TEST_PD, 1 << 18); > + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, > + IMX6Q_GPR1_PCIE_REF_CLK_EN, 0 << 16); > + break; > + } > + > + if (imx6_pcie->vpcie && regulator_is_enabled(imx6_pcie->vpcie) > 0) { > + int ret = regulator_disable(imx6_pcie->vpcie); > + > + if (ret) > + dev_err(dev, "failed to disable vpcie regulator: %d\n", > + ret); > + } > + > + /* Some boards don't have PCIe reset GPIO. */ > + if (gpio_is_valid(imx6_pcie->reset_gpio)) > + gpio_set_value_cansleep(imx6_pcie->reset_gpio, > + imx6_pcie->gpio_active_high); > +} > + > static void imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie) { > struct dw_pcie *pci = imx6_pcie->pci; > -- > 2.25.1
diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c index e63eb6380020..a6d2b907d42b 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -520,54 +520,6 @@ static int imx6_pcie_attach_pd(struct device *dev) return 0; } -static void imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie) -{ - struct device *dev = imx6_pcie->pci->dev; - - switch (imx6_pcie->drvdata->variant) { - case IMX7D: - case IMX8MQ: - reset_control_assert(imx6_pcie->pciephy_reset); - fallthrough; - case IMX8MM: - reset_control_assert(imx6_pcie->apps_reset); - break; - case IMX6SX: - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, - IMX6SX_GPR12_PCIE_TEST_POWERDOWN, - IMX6SX_GPR12_PCIE_TEST_POWERDOWN); - /* Force PCIe PHY reset */ - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR5, - IMX6SX_GPR5_PCIE_BTNRST_RESET, - IMX6SX_GPR5_PCIE_BTNRST_RESET); - break; - case IMX6QP: - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, - IMX6Q_GPR1_PCIE_SW_RST, - IMX6Q_GPR1_PCIE_SW_RST); - break; - case IMX6Q: - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, - IMX6Q_GPR1_PCIE_TEST_PD, 1 << 18); - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, - IMX6Q_GPR1_PCIE_REF_CLK_EN, 0 << 16); - break; - } - - if (imx6_pcie->vpcie && regulator_is_enabled(imx6_pcie->vpcie) > 0) { - int ret = regulator_disable(imx6_pcie->vpcie); - - if (ret) - dev_err(dev, "failed to disable vpcie regulator: %d\n", - ret); - } - - /* Some boards don't have PCIe reset GPIO. */ - if (gpio_is_valid(imx6_pcie->reset_gpio)) - gpio_set_value_cansleep(imx6_pcie->reset_gpio, - imx6_pcie->gpio_active_high); -} - static int imx6_pcie_enable_ref_clk(struct imx6_pcie *imx6_pcie) { struct dw_pcie *pci = imx6_pcie->pci; @@ -628,6 +580,54 @@ static int imx6_pcie_enable_ref_clk(struct imx6_pcie *imx6_pcie) return ret; } +static void imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie) +{ + struct device *dev = imx6_pcie->pci->dev; + + switch (imx6_pcie->drvdata->variant) { + case IMX7D: + case IMX8MQ: + reset_control_assert(imx6_pcie->pciephy_reset); + fallthrough; + case IMX8MM: + reset_control_assert(imx6_pcie->apps_reset); + break; + case IMX6SX: + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, + IMX6SX_GPR12_PCIE_TEST_POWERDOWN, + IMX6SX_GPR12_PCIE_TEST_POWERDOWN); + /* Force PCIe PHY reset */ + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR5, + IMX6SX_GPR5_PCIE_BTNRST_RESET, + IMX6SX_GPR5_PCIE_BTNRST_RESET); + break; + case IMX6QP: + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, + IMX6Q_GPR1_PCIE_SW_RST, + IMX6Q_GPR1_PCIE_SW_RST); + break; + case IMX6Q: + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, + IMX6Q_GPR1_PCIE_TEST_PD, 1 << 18); + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, + IMX6Q_GPR1_PCIE_REF_CLK_EN, 0 << 16); + break; + } + + if (imx6_pcie->vpcie && regulator_is_enabled(imx6_pcie->vpcie) > 0) { + int ret = regulator_disable(imx6_pcie->vpcie); + + if (ret) + dev_err(dev, "failed to disable vpcie regulator: %d\n", + ret); + } + + /* Some boards don't have PCIe reset GPIO. */ + if (gpio_is_valid(imx6_pcie->reset_gpio)) + gpio_set_value_cansleep(imx6_pcie->reset_gpio, + imx6_pcie->gpio_active_high); +} + static void imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie) { struct dw_pcie *pci = imx6_pcie->pci;