linux-kernel - [PATCH 18/21] PCI: imx6: Simplify bit operations in imx6_setup_phy

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Message-Id: <20181221072716.29017-19-andrew.smirnov@gmail.com>
Date:   Thu, 20 Dec 2018 23:27:13 -0800
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>,
        Fabio Estevam <fabio.estevam@....com>,
        Chris Healy <cphealy@...il.com>,
        Lucas Stach <l.stach@...gutronix.de>,
        Leonard Crestez <leonard.crestez@....com>,
        "A.s. Dong" <aisheng.dong@....com>,
        Richard Zhu <hongxing.zhu@....com>, linux-imx@....com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 18/21] PCI: imx6: Simplify bit operations in imx6_setup_phy_mpll()

Simplify bit operations in imx6_setup_phy_mpll() by using
GENMASK/FIELD_PREP. No functional change intended.

Cc: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>
Cc: Fabio Estevam <fabio.estevam@....com>
Cc: Chris Healy <cphealy@...il.com>
Cc: Lucas Stach <l.stach@...gutronix.de>
Cc: Leonard Crestez <leonard.crestez@....com>
Cc: "A.s. Dong" <aisheng.dong@....com>
Cc: Richard Zhu <hongxing.zhu@....com>
Cc: linux-imx@....com
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org
Cc: linux-pci@...r.kernel.org
Signed-off-by: Andrey Smirnov <andrew.smirnov@...il.com>
---
 drivers/pci/controller/dwc/pci-imx6.c | 16 ++++++----------
 1 file changed, 6 insertions(+), 10 deletions(-)

diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 38c8e8baa077..678f5fa85e12 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -96,12 +96,10 @@ struct imx6_pcie {
 /* PHY registers (not memory-mapped) */
 #define PCIE_PHY_ATEOVRD			0x10
 #define  PCIE_PHY_ATEOVRD_EN			BIT(2)
-#define  PCIE_PHY_ATEOVRD_REF_CLKDIV_SHIFT	0
-#define  PCIE_PHY_ATEOVRD_REF_CLKDIV_MASK	0x1
+#define  PCIE_PHY_ATEOVRD_REF_CLKDIV		BIT(0)
 
 #define PCIE_PHY_MPLL_OVRD_IN_LO		0x11
-#define  PCIE_PHY_MPLL_MULTIPLIER_SHIFT		2
-#define  PCIE_PHY_MPLL_MULTIPLIER_MASK		0x7f
+#define  PCIE_PHY_MPLL_MULTIPLIER		GENMASK(8, 2)
 #define  PCIE_PHY_MPLL_MULTIPLIER_OVRD		BIT(9)
 
 #define PHY_RX_OVRD_IN_LO 0x1005
@@ -565,16 +563,14 @@ static int imx6_setup_phy_mpll(struct imx6_pcie *imx6_pcie)
 	}
 
 	pcie_phy_read(imx6_pcie, PCIE_PHY_MPLL_OVRD_IN_LO, &val);
-	val &= ~(PCIE_PHY_MPLL_MULTIPLIER_MASK <<
-		 PCIE_PHY_MPLL_MULTIPLIER_SHIFT);
-	val |= mult << PCIE_PHY_MPLL_MULTIPLIER_SHIFT;
+	val &= ~PCIE_PHY_MPLL_MULTIPLIER;
+	val |= FIELD_PREP(PCIE_PHY_MPLL_MULTIPLIER, mult);
 	val |= PCIE_PHY_MPLL_MULTIPLIER_OVRD;
 	pcie_phy_write(imx6_pcie, PCIE_PHY_MPLL_OVRD_IN_LO, val);
 
 	pcie_phy_read(imx6_pcie, PCIE_PHY_ATEOVRD, &val);
-	val &= ~(PCIE_PHY_ATEOVRD_REF_CLKDIV_MASK <<
-		 PCIE_PHY_ATEOVRD_REF_CLKDIV_SHIFT);
-	val |= div << PCIE_PHY_ATEOVRD_REF_CLKDIV_SHIFT;
+	val &= ~PCIE_PHY_ATEOVRD_REF_CLKDIV;
+	val |= FIELD_PREP(PCIE_PHY_ATEOVRD_REF_CLKDIV, div);
 	val |= PCIE_PHY_ATEOVRD_EN;
 	pcie_phy_write(imx6_pcie, PCIE_PHY_ATEOVRD, val);
 
-- 
2.19.1