Patchwork [v4,07/11] PCI: imx6: Simplify bit operations in PHY functions

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Submitter Andrey Smirnov
Date April 15, 2019, 12:46 a.m.
Message ID <20190415004632.5907-8-andrew.smirnov@gmail.com>
Download mbox | patch
Permalink /patch/772771/
State New
Headers show

Comments

Andrey Smirnov - April 15, 2019, 12:46 a.m.
Simplify the code by incorporating left shifts into constant
defnitions as well as using FIELD_PREP/GENMASK. No functional change
intended.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.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
---
 drivers/pci/controller/dwc/pci-imx6.c | 28 +++++++++++++--------------
 1 file changed, 14 insertions(+), 14 deletions(-)

Patch

diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 5650642ab248..669e01353026 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -105,11 +105,11 @@  struct imx6_pcie {
 #define PL_OFFSET 0x700
 
 #define PCIE_PHY_CTRL (PL_OFFSET + 0x114)
-#define PCIE_PHY_CTRL_DATA_LOC 0
-#define PCIE_PHY_CTRL_CAP_ADR_LOC 16
-#define PCIE_PHY_CTRL_CAP_DAT_LOC 17
-#define PCIE_PHY_CTRL_WR_LOC 18
-#define PCIE_PHY_CTRL_RD_LOC 19
+#define PCIE_PHY_CTRL_DATA(x)		FIELD_PREP(GENMASK(15, 0), (x))
+#define PCIE_PHY_CTRL_CAP_ADR		BIT(16)
+#define PCIE_PHY_CTRL_CAP_DAT		BIT(17)
+#define PCIE_PHY_CTRL_WR		BIT(18)
+#define PCIE_PHY_CTRL_RD		BIT(19)
 
 #define PCIE_PHY_STAT (PL_OFFSET + 0x110)
 #define PCIE_PHY_STAT_ACK_LOC 16
@@ -178,17 +178,17 @@  static int pcie_phy_wait_ack(struct imx6_pcie *imx6_pcie, int addr)
 	u32 val;
 	int ret;
 
-	val = addr << PCIE_PHY_CTRL_DATA_LOC;
+	val = PCIE_PHY_CTRL_DATA(addr);
 	dw_pcie_writel_dbi(pci, PCIE_PHY_CTRL, val);
 
-	val |= (0x1 << PCIE_PHY_CTRL_CAP_ADR_LOC);
+	val |= PCIE_PHY_CTRL_CAP_ADR;
 	dw_pcie_writel_dbi(pci, PCIE_PHY_CTRL, val);
 
 	ret = pcie_phy_poll_ack(imx6_pcie, 1);
 	if (ret)
 		return ret;
 
-	val = addr << PCIE_PHY_CTRL_DATA_LOC;
+	val = PCIE_PHY_CTRL_DATA(addr);
 	dw_pcie_writel_dbi(pci, PCIE_PHY_CTRL, val);
 
 	return pcie_phy_poll_ack(imx6_pcie, 0);
@@ -206,7 +206,7 @@  static int pcie_phy_read(struct imx6_pcie *imx6_pcie, int addr, int *data)
 		return ret;
 
 	/* assert Read signal */
-	phy_ctl = 0x1 << PCIE_PHY_CTRL_RD_LOC;
+	phy_ctl = PCIE_PHY_CTRL_RD;
 	dw_pcie_writel_dbi(pci, PCIE_PHY_CTRL, phy_ctl);
 
 	ret = pcie_phy_poll_ack(imx6_pcie, 1);
@@ -234,11 +234,11 @@  static int pcie_phy_write(struct imx6_pcie *imx6_pcie, int addr, int data)
 	if (ret)
 		return ret;
 
-	var = data << PCIE_PHY_CTRL_DATA_LOC;
+	var = PCIE_PHY_CTRL_DATA(data);
 	dw_pcie_writel_dbi(pci, PCIE_PHY_CTRL, var);
 
 	/* capture data */
-	var |= (0x1 << PCIE_PHY_CTRL_CAP_DAT_LOC);
+	var |= PCIE_PHY_CTRL_CAP_DAT;
 	dw_pcie_writel_dbi(pci, PCIE_PHY_CTRL, var);
 
 	ret = pcie_phy_poll_ack(imx6_pcie, 1);
@@ -246,7 +246,7 @@  static int pcie_phy_write(struct imx6_pcie *imx6_pcie, int addr, int data)
 		return ret;
 
 	/* deassert cap data */
-	var = data << PCIE_PHY_CTRL_DATA_LOC;
+	var = PCIE_PHY_CTRL_DATA(data);
 	dw_pcie_writel_dbi(pci, PCIE_PHY_CTRL, var);
 
 	/* wait for ack de-assertion */
@@ -255,7 +255,7 @@  static int pcie_phy_write(struct imx6_pcie *imx6_pcie, int addr, int data)
 		return ret;
 
 	/* assert wr signal */
-	var = 0x1 << PCIE_PHY_CTRL_WR_LOC;
+	var = PCIE_PHY_CTRL_WR;
 	dw_pcie_writel_dbi(pci, PCIE_PHY_CTRL, var);
 
 	/* wait for ack */
@@ -264,7 +264,7 @@  static int pcie_phy_write(struct imx6_pcie *imx6_pcie, int addr, int data)
 		return ret;
 
 	/* deassert wr signal */
-	var = data << PCIE_PHY_CTRL_DATA_LOC;
+	var = PCIE_PHY_CTRL_DATA(data);
 	dw_pcie_writel_dbi(pci, PCIE_PHY_CTRL, var);
 
 	/* wait for ack de-assertion */