| Message ID | 1385500248-6551-4-git-send-email-marex@denx.de (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
On 26 November 2013 22:10, Marek Vasut <marex@denx.de> 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> > --- > drivers/pci/host/pci-imx6.c | 33 ++++++++++++++++++--------------- > 1 file changed, 18 insertions(+), 15 deletions(-) > > diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c > index 4d5be4e..a9781e7 100644 > --- a/drivers/pci/host/pci-imx6.c > +++ b/drivers/pci/host/pci-imx6.c > @@ -336,6 +336,23 @@ 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; > @@ -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; > } > -- > 1.8.4.3 > Thanks Marek, A minor: drivers/pci/host/pci-imx6.c: In function 'imx6_pcie_link_up': drivers/pci/host/pci-imx6.c:353:27: warning: unused variable 'temp' [-Wunused-variable] See the following mail for more info which tests I did with patch 1/7, 3/7, 4/7, 5/7 and 6/7: http://lists.infradead.org/pipermail/linux-arm-kernel/2013-November/214640.html Regards, Harro -- 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
Dear Harro Haan, > On 26 November 2013 22:10, Marek Vasut <marex@denx.de> 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> > > --- > > > > drivers/pci/host/pci-imx6.c | 33 ++++++++++++++++++--------------- > > 1 file changed, 18 insertions(+), 15 deletions(-) > > > > diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c > > index 4d5be4e..a9781e7 100644 > > --- a/drivers/pci/host/pci-imx6.c > > +++ b/drivers/pci/host/pci-imx6.c > > @@ -336,6 +336,23 @@ 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; > > > > @@ -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; > > > > } > > > > -- > > 1.8.4.3 > > Thanks Marek, > > A minor: > drivers/pci/host/pci-imx6.c: In function 'imx6_pcie_link_up': > drivers/pci/host/pci-imx6.c:353:27: warning: unused variable 'temp' > [-Wunused-variable] > > See the following mail for more info which tests I did with patch 1/7, > 3/7, 4/7, 5/7 and 6/7: > http://lists.infradead.org/pipermail/linux-arm-kernel/2013-November/214640. > html Thanks for the find and testing! -- 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..a9781e7 100644 --- a/drivers/pci/host/pci-imx6.c +++ b/drivers/pci/host/pci-imx6.c @@ -336,6 +336,23 @@ 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; @@ -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 | 33 ++++++++++++++++++--------------- 1 file changed, 18 insertions(+), 15 deletions(-)