PCI: keystone: Cleanup set_dbi_mode() and get_dbi_mode()

No functional change. Use BIT() macro for DBI_CS2 and cleanup
set_dbi_mode() and get_dbi_mode().

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>

1 files changed, 7 insertions, 5 deletions

diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c
index 3576a184b9eb..2decbaec81a3 100644
--- a/drivers/pci/controller/dwc/pci-keystone.c
+++ b/drivers/pci/controller/dwc/pci-keystone.c
@@ -40,7 +40,7 @@
 #define LTSSM_EN_VAL                    BIT(0)
 #define LTSSM_STATE_MASK                0x1f
 #define LTSSM_STATE_L0                  0x11
-#define DBI_CS2_EN_VAL                  0x20
+#define DBI_CS2                         BIT(5)
 #define OB_XLAT_EN_VAL                  BIT(1)
 
 /* Application registers */
@@ -315,11 +315,12 @@ static void ks_pcie_set_dbi_mode(struct keystone_pcie *ks_pcie)
         u32 val;
 
         val = ks_pcie_app_readl(ks_pcie, CMD_STATUS);
-        ks_pcie_app_writel(ks_pcie, CMD_STATUS, DBI_CS2_EN_VAL | val);
+        val |= DBI_CS2;
+        ks_pcie_app_writel(ks_pcie, CMD_STATUS, val);
 
         do {
                 val = ks_pcie_app_readl(ks_pcie, CMD_STATUS);
-        } while (!(val & DBI_CS2_EN_VAL));
+        } while (!(val & DBI_CS2));
 }
 
 /**
@@ -333,11 +334,12 @@ static void ks_pcie_clear_dbi_mode(struct keystone_pcie *ks_pcie)
         u32 val;
 
         val = ks_pcie_app_readl(ks_pcie, CMD_STATUS);
-        ks_pcie_app_writel(ks_pcie, CMD_STATUS, ~DBI_CS2_EN_VAL & val);
+        val &= ~DBI_CS2;
+        ks_pcie_app_writel(ks_pcie, CMD_STATUS, val);
 
         do {
                 val = ks_pcie_app_readl(ks_pcie, CMD_STATUS);
-        } while (val & DBI_CS2_EN_VAL);
+        } while (val & DBI_CS2);
 }
 
 static void ks_pcie_setup_rc_app_regs(struct keystone_pcie *ks_pcie)