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| author | Marek Vasut <marex@denx.de> | 2013-12-12 22:50:00 +0100 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2013-12-19 10:56:10 -0700 |
| commit | 982aa234512f6a88932a5ece7f7becbf4b08ece7 (patch) | |
| tree | 93949c948a33eacbc08b1be4b5decbd735514eec /drivers/pci/host | |
| parent | 7f9f40c01cce0c0e0ced34af2a2fd8353cc606c3 (diff) | |
| download | linux-982aa234512f6a88932a5ece7f7becbf4b08ece7.tar.gz linux-982aa234512f6a88932a5ece7f7becbf4b08ece7.tar.bz2 linux-982aa234512f6a88932a5ece7f7becbf4b08ece7.zip | |
PCI: imx6: Factor out PHY reset
Split the PCIe PHY reset from the link up function to make the code a
little more structured.
No functional change.
Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
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: 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>
Diffstat (limited to 'drivers/pci/host')
| -rw-r--r-- | drivers/pci/host/pci-imx6.c | 35 |
1 files changed, 19 insertions, 16 deletions
diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c index 5634a33ea642..25dde2c7b445 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; } |