| Message ID | 20190401042547.14067-2-andrew.smirnov@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | i.MX6, DesignWare PCI improvements | expand |
Am Sonntag, den 31.03.2019, 21:25 -0700 schrieb Andrey Smirnov: > Make use of regmap_read_poll_timeout() to simplify > imx7d_pcie_wait_for_phy_pll_lock(). No functional change intended. > > > Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> > > Cc: Bjorn Helgaas <bhelgaas@google.com> > > Cc: Fabio Estevam <fabio.estevam@nxp.com> > > Cc: Chris Healy <cphealy@gmail.com> > > Cc: Lucas Stach <l.stach@pengutronix.de> > > Cc: Leonard Crestez <leonard.crestez@nxp.com> > > Cc: "A.s. Dong" <aisheng.dong@nxp.com> > > Cc: Richard Zhu <hongxing.zhu@nxp.com> > Cc: linux-imx@nxp.com > Cc: linux-arm-kernel@lists.infradead.org > Cc: linux-kernel@vger.kernel.org > Cc: linux-pci@vger.kernel.org > Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Reviewed-by: Lucas Stach <l.stach@pengutronix.de> > --- > drivers/pci/controller/dwc/pci-imx6.c | 21 +++++++-------------- > 1 file changed, 7 insertions(+), 14 deletions(-) > > diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c > index 2eb39d5de4f6..fb0b29e5b1f0 100644 > --- a/drivers/pci/controller/dwc/pci-imx6.c > +++ b/drivers/pci/controller/dwc/pci-imx6.c > @@ -89,9 +89,8 @@ struct imx6_pcie { > }; > > /* Parameters for the waiting for PCIe PHY PLL to lock on i.MX7 */ > > -#define PHY_PLL_LOCK_WAIT_MAX_RETRIES 2000 > > -#define PHY_PLL_LOCK_WAIT_USLEEP_MIN 50 > > #define PHY_PLL_LOCK_WAIT_USLEEP_MAX 200 > > +#define PHY_PLL_LOCK_WAIT_TIMEOUT (2000 * PHY_PLL_LOCK_WAIT_USLEEP_MAX) > > /* PCIe Root Complex registers (memory-mapped) */ > > #define PCIE_RC_IMX6_MSI_CAP 0x50 > @@ -488,20 +487,14 @@ static int imx6_pcie_enable_ref_clk(struct imx6_pcie *imx6_pcie) > static void imx7d_pcie_wait_for_phy_pll_lock(struct imx6_pcie *imx6_pcie) > { > > u32 val; > > - unsigned int retries; > > struct device *dev = imx6_pcie->pci->dev; > > > - for (retries = 0; retries < PHY_PLL_LOCK_WAIT_MAX_RETRIES; retries++) { > > - regmap_read(imx6_pcie->iomuxc_gpr, IOMUXC_GPR22, &val); > - > > - if (val & IMX7D_GPR22_PCIE_PHY_PLL_LOCKED) > > - return; > - > > - usleep_range(PHY_PLL_LOCK_WAIT_USLEEP_MIN, > > - PHY_PLL_LOCK_WAIT_USLEEP_MAX); > > - } > - > > - dev_err(dev, "PCIe PLL lock timeout\n"); > > + if (regmap_read_poll_timeout(imx6_pcie->iomuxc_gpr, > > + IOMUXC_GPR22, val, > > + val & IMX7D_GPR22_PCIE_PHY_PLL_LOCKED, > > + PHY_PLL_LOCK_WAIT_USLEEP_MAX, > > + PHY_PLL_LOCK_WAIT_TIMEOUT)) > > + dev_err(dev, "PCIe PLL lock timeout\n"); > } > > static void imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie)
diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c index 2eb39d5de4f6..fb0b29e5b1f0 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -89,9 +89,8 @@ struct imx6_pcie { }; /* Parameters for the waiting for PCIe PHY PLL to lock on i.MX7 */ -#define PHY_PLL_LOCK_WAIT_MAX_RETRIES 2000 -#define PHY_PLL_LOCK_WAIT_USLEEP_MIN 50 #define PHY_PLL_LOCK_WAIT_USLEEP_MAX 200 +#define PHY_PLL_LOCK_WAIT_TIMEOUT (2000 * PHY_PLL_LOCK_WAIT_USLEEP_MAX) /* PCIe Root Complex registers (memory-mapped) */ #define PCIE_RC_IMX6_MSI_CAP 0x50 @@ -488,20 +487,14 @@ static int imx6_pcie_enable_ref_clk(struct imx6_pcie *imx6_pcie) static void imx7d_pcie_wait_for_phy_pll_lock(struct imx6_pcie *imx6_pcie) { u32 val; - unsigned int retries; struct device *dev = imx6_pcie->pci->dev; - for (retries = 0; retries < PHY_PLL_LOCK_WAIT_MAX_RETRIES; retries++) { - regmap_read(imx6_pcie->iomuxc_gpr, IOMUXC_GPR22, &val); - - if (val & IMX7D_GPR22_PCIE_PHY_PLL_LOCKED) - return; - - usleep_range(PHY_PLL_LOCK_WAIT_USLEEP_MIN, - PHY_PLL_LOCK_WAIT_USLEEP_MAX); - } - - dev_err(dev, "PCIe PLL lock timeout\n"); + if (regmap_read_poll_timeout(imx6_pcie->iomuxc_gpr, + IOMUXC_GPR22, val, + val & IMX7D_GPR22_PCIE_PHY_PLL_LOCKED, + PHY_PLL_LOCK_WAIT_USLEEP_MAX, + PHY_PLL_LOCK_WAIT_TIMEOUT)) + dev_err(dev, "PCIe PLL lock timeout\n"); } static void imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie)
Make use of regmap_read_poll_timeout() to simplify imx7d_pcie_wait_for_phy_pll_lock(). No functional change intended. Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Fabio Estevam <fabio.estevam@nxp.com> Cc: Chris Healy <cphealy@gmail.com> Cc: Lucas Stach <l.stach@pengutronix.de> Cc: Leonard Crestez <leonard.crestez@nxp.com> Cc: "A.s. Dong" <aisheng.dong@nxp.com> Cc: Richard Zhu <hongxing.zhu@nxp.com> Cc: linux-imx@nxp.com Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Cc: linux-pci@vger.kernel.org Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> --- drivers/pci/controller/dwc/pci-imx6.c | 21 +++++++-------------- 1 file changed, 7 insertions(+), 14 deletions(-)