| Message ID | 1386757818-5154-3-git-send-email-marex@denx.de (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
On Wednesday, December 11, 2013 7:30 PM, Marek Vasut wrote: > > Split the PCIe PHY reset from the link up function to make > the code a little more structured. > > Signed-off-by: Marek Vasut <marex@denx.de> > Cc: Bjorn Helgaas <bhelgaas@google.com> > Cc: Frank Li <lznuaa@gmail.com> > Cc: Harro Haan <hrhaan@gmail.com> > Cc: Jingoo Han <jg1.han@samsung.com> > Cc: Mohit KUMAR <Mohit.KUMAR@st.com> > Cc: Pratyush Anand <pratyush.anand@st.com> > Cc: Richard Zhu <r65037@freescale.com> > Cc: Sascha Hauer <s.hauer@pengutronix.de> > Cc: Sean Cross <xobs@kosagi.com> > Cc: Shawn Guo <shawn.guo@linaro.org> > Cc: Siva Reddy Kallam <siva.kallam@samsung.com> > Cc: Srikanth T Shivanand <ts.srikanth@samsung.com> > Cc: Tim Harvey <tharvey@gateworks.com> > Cc: Troy Kisky <troy.kisky@boundarydevices.com> > Cc: Yinghai Lu <yinghai@kernel.org> Reviewed-by: Jingoo Han <jg1.han@samsung.com> Best regards, Jingoo Han > --- > drivers/pci/host/pci-imx6.c | 35 +++++++++++++++++++---------------- > 1 file changed, 19 insertions(+), 16 deletions(-) > > V2: Drop unused 'temp' variable. -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c index 4d5be4e..478e87e 100644 --- a/drivers/pci/host/pci-imx6.c +++ b/drivers/pci/host/pci-imx6.c @@ -336,9 +336,26 @@ static void imx6_pcie_host_init(struct pcie_port *pp) return; } +static void imx6_pcie_reset_phy(struct pcie_port *pp) +{ + uint32_t temp; + + pcie_phy_read(pp->dbi_base, PHY_RX_OVRD_IN_LO, &temp); + temp |= (PHY_RX_OVRD_IN_LO_RX_DATA_EN | + PHY_RX_OVRD_IN_LO_RX_PLL_EN); + pcie_phy_write(pp->dbi_base, PHY_RX_OVRD_IN_LO, temp); + + usleep_range(2000, 3000); + + pcie_phy_read(pp->dbi_base, PHY_RX_OVRD_IN_LO, &temp); + temp &= ~(PHY_RX_OVRD_IN_LO_RX_DATA_EN | + PHY_RX_OVRD_IN_LO_RX_PLL_EN); + pcie_phy_write(pp->dbi_base, PHY_RX_OVRD_IN_LO, temp); +} + static int imx6_pcie_link_up(struct pcie_port *pp) { - u32 rc, ltssm, rx_valid, temp; + u32 rc, ltssm, rx_valid; /* * Test if the PHY reports that the link is up and also that @@ -370,21 +387,7 @@ static int imx6_pcie_link_up(struct pcie_port *pp) dev_err(pp->dev, "transition to gen2 is stuck, reset PHY!\n"); - pcie_phy_read(pp->dbi_base, - PHY_RX_OVRD_IN_LO, &temp); - temp |= (PHY_RX_OVRD_IN_LO_RX_DATA_EN - | PHY_RX_OVRD_IN_LO_RX_PLL_EN); - pcie_phy_write(pp->dbi_base, - PHY_RX_OVRD_IN_LO, temp); - - usleep_range(2000, 3000); - - pcie_phy_read(pp->dbi_base, - PHY_RX_OVRD_IN_LO, &temp); - temp &= ~(PHY_RX_OVRD_IN_LO_RX_DATA_EN - | PHY_RX_OVRD_IN_LO_RX_PLL_EN); - pcie_phy_write(pp->dbi_base, - PHY_RX_OVRD_IN_LO, temp); + imx6_pcie_reset_phy(pp); return 0; }
Split the PCIe PHY reset from the link up function to make the code a little more structured. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Frank Li <lznuaa@gmail.com> Cc: Harro Haan <hrhaan@gmail.com> Cc: Jingoo Han <jg1.han@samsung.com> Cc: Mohit KUMAR <Mohit.KUMAR@st.com> Cc: Pratyush Anand <pratyush.anand@st.com> Cc: Richard Zhu <r65037@freescale.com> Cc: Sascha Hauer <s.hauer@pengutronix.de> Cc: Sean Cross <xobs@kosagi.com> Cc: Shawn Guo <shawn.guo@linaro.org> Cc: Siva Reddy Kallam <siva.kallam@samsung.com> Cc: Srikanth T Shivanand <ts.srikanth@samsung.com> Cc: Tim Harvey <tharvey@gateworks.com> Cc: Troy Kisky <troy.kisky@boundarydevices.com> Cc: Yinghai Lu <yinghai@kernel.org> --- drivers/pci/host/pci-imx6.c | 35 +++++++++++++++++++---------------- 1 file changed, 19 insertions(+), 16 deletions(-) V2: Drop unused 'temp' variable.