diff options
| author | Richard Zhu <r65037@freescale.com> | 2013-09-06 12:33:31 +0800 |
|---|---|---|
| committer | Jason Liu <r64343@freescale.com> | 2013-10-30 09:55:30 +0800 |
| commit | 1976e889408175354a19824375bc5137f43ef14e (patch) | |
| tree | 72ed4c4819141d1bc3796d2f3aabb788a32ad85d /drivers/pci | |
| parent | e40ec3263372a4f21f7a1ae0d9f174107a2c1f1f (diff) | |
ENGR00278492 imx: pcie: delay is required after REF_CLK_EN is set
delay is required after REF_CLK_EN of GPR1 is set.
otherwise, system would be hang when access the registers
of PCIe RC when the EARLY_PRINTK is not enabled.
Signed-off-by: Richard Zhu <r65037@freescale.com>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/host/pcie-imx.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/pci/host/pcie-imx.c b/drivers/pci/host/pcie-imx.c index 192b2f4ac0b0..22af44af46d8 100644 --- a/drivers/pci/host/pcie-imx.c +++ b/drivers/pci/host/pcie-imx.c @@ -468,6 +468,7 @@ static int __init imx_pcie_probe(struct platform_device *pdev) regmap_update_bits(imx_pcie->gpr, IOMUXC_GPR1, IMX6Q_GPR1_PCIE_REF_CLK_EN, 1 << 16); + usleep_range(1000, 2000); /* PCIE RESET, togle the external card's reset */ imx_pcie->rst_gpio = of_get_named_gpio(np, "rst-gpios", 0); |