linux-kernel - [RFC PATCH 2/3] mips: ralink: mt7621: soc queries and tests as functions

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Date:   Thu,  3 Nov 2022 15:05:37 +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 2/3] mips: ralink: mt7621: soc queries and tests as functions

Move the SoC register value queries and tests to specific functions,
to remove repetition of logic
No functional changes intended

Signed-off-by: John Thomson <git@...nthomson.fastmail.com.au>
---
 arch/mips/ralink/mt7621.c | 86 +++++++++++++++++++++++++++------------
 1 file changed, 61 insertions(+), 25 deletions(-)

diff --git a/arch/mips/ralink/mt7621.c b/arch/mips/ralink/mt7621.c
index 17dbf28897e0..f2443b833bc3 100644
--- a/arch/mips/ralink/mt7621.c
+++ b/arch/mips/ralink/mt7621.c
@@ -97,7 +97,57 @@ void __init ralink_of_remap(void)
 		panic("Failed to remap core resources");
 }
 
-static void soc_dev_init(struct ralink_soc_info *soc_info, u32 rev)
+static const unsigned int __init mt7621_get_soc_name0(void)
+{
+	return __raw_readl(MT7621_SYSC_BASE + SYSC_REG_CHIP_NAME0);
+}
+
+static const unsigned int __init mt7621_get_soc_name1(void)
+{
+	return __raw_readl(MT7621_SYSC_BASE + SYSC_REG_CHIP_NAME1);
+}
+
+static const bool __init mt7621_soc_valid(void)
+{
+	if (mt7621_get_soc_name0() == MT7621_CHIP_NAME0 &&
+			mt7621_get_soc_name1() == MT7621_CHIP_NAME1)
+		return true;
+	else
+		return false;
+}
+
+static const char __init *mt7621_get_soc_id(void)
+{
+	if (mt7621_soc_valid())
+		return "MT7621";
+	else
+		return "invalid";
+}
+
+static const unsigned int __init mt7621_get_soc_rev(void)
+{
+	return __raw_readl(MT7621_SYSC_BASE + SYSC_REG_CHIP_REV);
+}
+
+static const unsigned int __init mt7621_get_soc_ver(void)
+{
+	return (mt7621_get_soc_rev() >> CHIP_REV_VER_SHIFT) & CHIP_REV_VER_MASK;
+}
+
+static const unsigned int __init mt7621_get_soc_eco(void)
+{
+	return (mt7621_get_soc_rev() & CHIP_REV_ECO_MASK);
+}
+
+static const char __init *mt7621_get_soc_revision(void)
+{
+	if (mt7621_get_soc_rev() == 1 && mt7621_get_soc_eco() == 1)
+		return "E2";
+	else
+		return "E1";
+}
+
+static void soc_dev_init(struct ralink_soc_info *soc_info)
 {
 	struct soc_device *soc_dev;
 	struct soc_device_attribute *soc_dev_attr;
@@ -108,12 +158,7 @@ static void soc_dev_init(struct ralink_soc_info *soc_info, u32 rev)
 
 	soc_dev_attr->soc_id = "mt7621";
 	soc_dev_attr->family = "Ralink";
-
-	if (((rev >> CHIP_REV_VER_SHIFT) & CHIP_REV_VER_MASK) == 1 &&
-	    (rev & CHIP_REV_ECO_MASK) == 1)
-		soc_dev_attr->revision = "E2";
-	else
-		soc_dev_attr->revision = "E1";
+	soc_dev_attr->revision = mt7621_get_soc_revision();
 
 	soc_dev_attr->data = soc_info;
 
@@ -126,11 +171,6 @@ static void soc_dev_init(struct ralink_soc_info *soc_info, u32 rev)
 
 void __init prom_soc_init(struct ralink_soc_info *soc_info)
 {
-	unsigned char *name = NULL;
-	u32 n0;
-	u32 n1;
-	u32 rev;
-
 	/* Early detection of CMP support */
 	mips_cm_probe();
 	mips_cpc_probe();
@@ -153,27 +193,23 @@ void __init prom_soc_init(struct ralink_soc_info *soc_info)
 		__sync();
 	}
 
-	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";
+	if (mt7621_soc_valid())
 		soc_info->compatible = "mediatek,mt7621-soc";
-	} else {
-		panic("mt7621: unknown SoC, n0:%08x n1:%08x\n", n0, n1);
-	}
+	else
+		panic("mt7621: unknown SoC, n0:%08x n1:%08x\n",
+				mt7621_get_soc_name0(),
+				mt7621_get_soc_name1());
 	ralink_soc = MT762X_SOC_MT7621AT;
-	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",
-		name,
-		(rev >> CHIP_REV_VER_SHIFT) & CHIP_REV_VER_MASK,
-		(rev & CHIP_REV_ECO_MASK));
+		mt7621_get_soc_id(),
+		mt7621_get_soc_ver(),
+		mt7621_get_soc_eco());
 
 	soc_info->mem_detect = mt7621_memory_detect;
 
-	soc_dev_init(soc_info, rev);
+	soc_dev_init(soc_info);
 
 	if (!register_cps_smp_ops())
 		return;
-- 
2.37.2