linux-kernel - [PATCH 15/19] PCI: keystone: Cleanup set_dbi_mode and get_dbi

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Date:   Mon, 15 Oct 2018 18:37:17 +0530
From:   Kishon Vijay Abraham I <kishon@...com>
To:     Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Murali Karicheri <m-karicheri2@...com>,
        Jingoo Han <jingoohan1@...il.com>,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>
CC:     Rob Herring <robh+dt@...nel.org>, <linux-pci@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        Kishon Vijay Abraham I <kishon@...com>
Subject: [PATCH 15/19] PCI: keystone: Cleanup set_dbi_mode and get_dbi_mode

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

Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
---
 drivers/pci/controller/dwc/pci-keystone.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c
index 68b080aef3ac..7015a353a614 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 */
@@ -319,11 +319,12 @@ 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));
 }
 
 /**
@@ -337,11 +338,12 @@ 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)
-- 
2.17.1