[PATCH v4 11/11] PCI: imx6: Use usleep_range() in imx6_pcie_enable_ref_clk()

[Andrey Smirnov]

imx6_pcie_enable_ref_clk() is never called in atomic context, so
there's no need to use udelay(). Replace it with usleep_range().

Signed-off-by: Andrey Smirnov <andrew.smir...@gmail.com>
Cc: Lorenzo Pieralisi <lorenzo.pieral...@arm.com>
Cc: Bjorn Helgaas <bhelg...@google.com>
Cc: Chris Healy <cphe...@gmail.com>
Cc: Lucas Stach <l.st...@pengutronix.de>
Cc: linux-kernel@vger.kernel.org
Cc: linux-...@vger.kernel.org
---
 drivers/pci/controller/dwc/pci-imx6.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/controller/dwc/pci-imx6.c 
b/drivers/pci/controller/dwc/pci-imx6.c
index 3e45f49b8a4f..c6d6bde4d860 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -449,7 +449,7 @@ static int imx6_pcie_enable_ref_clk(struct imx6_pcie 
*imx6_pcie)
                 * reset time is too short, cannot meet the requirement.
                 * add one ~10us delay here.
                 */
-               udelay(10);
+               usleep_range(10, 100);
                regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1,
                                   IMX6Q_GPR1_PCIE_REF_CLK_EN, 1 << 16);
                break;
-- 
2.20.1