linux-kernel - [RFC PATCH 1/3] mips: ralink: mt7621: define MT7621_SYSC_BASE with _

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Date:   Thu,  3 Nov 2022 15:05:36 +1000
From:   John Thomson <git@...nthomson.fastmail.com.au>
To:     Sergio Paracuellos <sergio.paracuellos@...il.com>,
        Arınç ÜNAL <arinc.unal@...nc9.com>,
        John Crispin <john@...ozen.org>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Cc:     linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org,
        John Thomson <git@...nthomson.fastmail.com.au>
Subject: [RFC PATCH 1/3] mips: ralink: mt7621: define MT7621_SYSC_BASE with __iomem

So that MT7621_SYSC_BASE can be used later in multiple functions without
needing to repeat this __iomem declaration each time

Signed-off-by: John Thomson <git@...nthomson.fastmail.com.au>
---
 arch/mips/include/asm/mach-ralink/mt7621.h | 4 +++-
 arch/mips/ralink/mt7621.c                  | 7 +++----
 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/arch/mips/include/asm/mach-ralink/mt7621.h b/arch/mips/include/asm/mach-ralink/mt7621.h
index 6bbf082dd149..905c5b3ed2bd 100644
--- a/arch/mips/include/asm/mach-ralink/mt7621.h
+++ b/arch/mips/include/asm/mach-ralink/mt7621.h
@@ -7,10 +7,12 @@
 #ifndef _MT7621_REGS_H_
 #define _MT7621_REGS_H_
 
+#define IOMEM(x)			((void __iomem *)(KSEG1ADDR(CPHYSADDR(x))))
+
 #define MT7621_PALMBUS_BASE		0x1C000000
 #define MT7621_PALMBUS_SIZE		0x03FFFFFF
 
-#define MT7621_SYSC_BASE		0x1E000000
+#define MT7621_SYSC_BASE		IOMEM(0x1E000000)
 
 #define SYSC_REG_CHIP_NAME0		0x00
 #define SYSC_REG_CHIP_NAME1		0x04
diff --git a/arch/mips/ralink/mt7621.c b/arch/mips/ralink/mt7621.c
index fb0565bc34fd..17dbf28897e0 100644
--- a/arch/mips/ralink/mt7621.c
+++ b/arch/mips/ralink/mt7621.c
@@ -126,7 +126,6 @@ static void soc_dev_init(struct ralink_soc_info *soc_info, u32 rev)
 
 void __init prom_soc_init(struct ralink_soc_info *soc_info)
 {
-	void __iomem *sysc = (void __iomem *) KSEG1ADDR(MT7621_SYSC_BASE);
 	unsigned char *name = NULL;
 	u32 n0;
 	u32 n1;
@@ -154,8 +153,8 @@ void __init prom_soc_init(struct ralink_soc_info *soc_info)
 		__sync();
 	}
 
-	n0 = __raw_readl(sysc + SYSC_REG_CHIP_NAME0);
-	n1 = __raw_readl(sysc + SYSC_REG_CHIP_NAME1);
+	n0 = __raw_readl(MT7621_SYSC_BASE + SYSC_REG_CHIP_NAME0);
+	n1 = __raw_readl(MT7621_SYSC_BASE + SYSC_REG_CHIP_NAME1);
 
 	if (n0 == MT7621_CHIP_NAME0 && n1 == MT7621_CHIP_NAME1) {
 		name = "MT7621";
@@ -164,7 +163,7 @@ void __init prom_soc_init(struct ralink_soc_info *soc_info)
 		panic("mt7621: unknown SoC, n0:%08x n1:%08x\n", n0, n1);
 	}
 	ralink_soc = MT762X_SOC_MT7621AT;
-	rev = __raw_readl(sysc + SYSC_REG_CHIP_REV);
+	rev = __raw_readl(MT7621_SYSC_BASE + SYSC_REG_CHIP_REV);
 
 	snprintf(soc_info->sys_type, RAMIPS_SYS_TYPE_LEN,
 		"MediaTek %s ver:%u eco:%u",
-- 
2.37.2