PCI: imx6: Use usleep_range() in imx6_pcie_enable_ref_clk()

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.smirnov@gmail.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Chris Healy <cphealy@gmail.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: linux-kernel@vger.kernel.org
Cc: linux-pci@vger.kernel.org

diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 3e45f49b8a4f873f32f5828d959285e472fd46f7..c6d6bde4d8605405ebd3da60f077be7bfee7afb8 100644 (file)
--- 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;