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| author | David S. Miller <davem@davemloft.net> | 2014-11-01 19:53:27 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-11-01 19:53:27 +0100 |
| commit | 55b42b5ca2dcf143465968697fe6c6503b05fca1 (patch) | |
| tree | 91878cd53efc44ba67244d4d3897020828c87c01 /drivers/pci/host/pci-imx6.c | |
| parent | drivers: net: cpsw: Support ALLMULTI and fix IFF_PROMISC in switch mode (diff) | |
| parent | sunhme: Add DMA mapping error checks. (diff) | |
| download | linux-55b42b5ca2dcf143465968697fe6c6503b05fca1.tar.xz linux-55b42b5ca2dcf143465968697fe6c6503b05fca1.zip | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
drivers/net/phy/marvell.c
Simple overlapping changes in drivers/net/phy/marvell.c
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/pci/host/pci-imx6.c')
| -rw-r--r-- | drivers/pci/host/pci-imx6.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c index 233fe8a88264..69202d1eb8fb 100644 --- a/drivers/pci/host/pci-imx6.c +++ b/drivers/pci/host/pci-imx6.c @@ -275,15 +275,22 @@ static int imx6_pcie_deassert_core_reset(struct pcie_port *pp) goto err_pcie; } - /* allow the clocks to stabilize */ - usleep_range(200, 500); - /* power up core phy and enable ref clock */ regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, IMX6Q_GPR1_PCIE_TEST_PD, 0 << 18); + /* + * the async reset input need ref clock to sync internally, + * when the ref clock comes after reset, internal synced + * reset time is too short, cannot meet the requirement. + * add one ~10us delay here. + */ + udelay(10); regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, IMX6Q_GPR1_PCIE_REF_CLK_EN, 1 << 16); + /* allow the clocks to stabilize */ + usleep_range(200, 500); + /* Some boards don't have PCIe reset GPIO. */ if (gpio_is_valid(imx6_pcie->reset_gpio)) { gpio_set_value(imx6_pcie->reset_gpio, 0); |