linux-kernel - [PATCH v4 11/11] PCI: imx6: Use usleep_range() in imx6_pcie_enable_ref

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Date:   Sun, 14 Apr 2019 17:46:32 -0700
From:   Andrey Smirnov <andrew.smirnov@...il.com>
To:     linux-pci@...r.kernel.org
Cc:     Andrey Smirnov <andrew.smirnov@...il.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Chris Healy <cphealy@...il.com>,
        Lucas Stach <l.stach@...gutronix.de>,
        linux-kernel@...r.kernel.org
Subject: [PATCH v4 11/11] 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@...il.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>
Cc: Chris Healy <cphealy@...il.com>
Cc: Lucas Stach <l.stach@...gutronix.de>
Cc: linux-kernel@...r.kernel.org
Cc: linux-pci@...r.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