1 files changed, 124 insertions, 23 deletions

diff --git a/arch/mips/ralink/rt305x.c b/arch/mips/ralink/rt305x.c
index 8b095a9dcb15..d8dcc5cc66cc 100644
--- a/arch/mips/ralink/rt305x.c
+++ b/arch/mips/ralink/rt305x.c
@@ -11,6 +11,8 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/bug.h>
+#include <linux/slab.h>
+#include <linux/sys_soc.h>
 
 #include <asm/io.h>
 #include <asm/mipsregs.h>
@@ -19,13 +21,14 @@
 
 #include "common.h"
 
+static struct ralink_soc_info *soc_info_ptr;
+
 static unsigned long rt5350_get_mem_size(void)
 {
-	void __iomem *sysc = (void __iomem *) KSEG1ADDR(RT305X_SYSC_BASE);
 	unsigned long ret;
 	u32 t;
 
-	t = __raw_readl(sysc + SYSC_REG_SYSTEM_CONFIG);
+	t = __raw_readl(RT305X_SYSC_BASE + SYSC_REG_SYSTEM_CONFIG);
 	t = (t >> RT5350_SYSCFG0_DRAM_SIZE_SHIFT) &
 		RT5350_SYSCFG0_DRAM_SIZE_MASK;
 
@@ -140,53 +143,149 @@ void __init ralink_of_remap(void)
 		panic("Failed to remap core resources");
 }
 
-void __init prom_soc_init(struct ralink_soc_info *soc_info)
+static unsigned int __init rt305x_get_soc_name0(void)
+{
+	return __raw_readl(RT305X_SYSC_BASE + SYSC_REG_CHIP_NAME0);
+}
+
+static unsigned int __init rt305x_get_soc_name1(void)
+{
+	return __raw_readl(RT305X_SYSC_BASE + SYSC_REG_CHIP_NAME1);
+}
+
+static bool __init rt3052_soc_valid(void)
+{
+	if (rt305x_get_soc_name0() == RT3052_CHIP_NAME0 &&
+	    rt305x_get_soc_name1() == RT3052_CHIP_NAME1)
+		return true;
+	else
+		return false;
+}
+
+static bool __init rt3350_soc_valid(void)
 {
-	void __iomem *sysc = (void __iomem *) KSEG1ADDR(RT305X_SYSC_BASE);
-	unsigned char *name;
-	u32 n0;
-	u32 n1;
-	u32 id;
+	if (rt305x_get_soc_name0() == RT3350_CHIP_NAME0 &&
+	    rt305x_get_soc_name1() == RT3350_CHIP_NAME1)
+		return true;
+	else
+		return false;
+}
+
+static bool __init rt3352_soc_valid(void)
+{
+	if (rt305x_get_soc_name0() == RT3352_CHIP_NAME0 &&
+	    rt305x_get_soc_name1() == RT3352_CHIP_NAME1)
+		return true;
+	else
+		return false;
+}
 
-	n0 = __raw_readl(sysc + SYSC_REG_CHIP_NAME0);
-	n1 = __raw_readl(sysc + SYSC_REG_CHIP_NAME1);
+static bool __init rt5350_soc_valid(void)
+{
+	if (rt305x_get_soc_name0() == RT5350_CHIP_NAME0 &&
+	    rt305x_get_soc_name1() == RT5350_CHIP_NAME1)
+		return true;
+	else
+		return false;
+}
 
-	if (n0 == RT3052_CHIP_NAME0 && n1 == RT3052_CHIP_NAME1) {
+static const char __init *rt305x_get_soc_name(struct ralink_soc_info *soc_info)
+{
+	if (rt3052_soc_valid()) {
 		unsigned long icache_sets;
 
 		icache_sets = (read_c0_config1() >> 22) & 7;
 		if (icache_sets == 1) {
 			ralink_soc = RT305X_SOC_RT3050;
-			name = "RT3050";
 			soc_info->compatible = "ralink,rt3050-soc";
+			return "RT3050";
 		} else {
 			ralink_soc = RT305X_SOC_RT3052;
-			name = "RT3052";
 			soc_info->compatible = "ralink,rt3052-soc";
+			return "RT3052";
 		}
-	} else if (n0 == RT3350_CHIP_NAME0 && n1 == RT3350_CHIP_NAME1) {
+	} else if (rt3350_soc_valid()) {
 		ralink_soc = RT305X_SOC_RT3350;
-		name = "RT3350";
 		soc_info->compatible = "ralink,rt3350-soc";
-	} else if (n0 == RT3352_CHIP_NAME0 && n1 == RT3352_CHIP_NAME1) {
+		return "RT3350";
+	} else if (rt3352_soc_valid()) {
 		ralink_soc = RT305X_SOC_RT3352;
-		name = "RT3352";
 		soc_info->compatible = "ralink,rt3352-soc";
-	} else if (n0 == RT5350_CHIP_NAME0 && n1 == RT5350_CHIP_NAME1) {
+		return "RT3352";
+	} else if (rt5350_soc_valid()) {
 		ralink_soc = RT305X_SOC_RT5350;
-		name = "RT5350";
 		soc_info->compatible = "ralink,rt5350-soc";
+		return "RT5350";
 	} else {
-		panic("rt305x: unknown SoC, n0:%08x n1:%08x", n0, n1);
+		panic("rt305x: unknown SoC, n0:%08x n1:%08x",
+		      rt305x_get_soc_name0(), rt305x_get_soc_name1());
 	}
+}
 
-	id = __raw_readl(sysc + SYSC_REG_CHIP_ID);
+static unsigned int __init rt305x_get_soc_id(void)
+{
+	return __raw_readl(RT305X_SYSC_BASE + SYSC_REG_CHIP_ID);
+}
+
+static unsigned int __init rt305x_get_soc_ver(void)
+{
+	return (rt305x_get_soc_id() >> CHIP_ID_ID_SHIFT) & CHIP_ID_ID_MASK;
+}
+
+static unsigned int __init rt305x_get_soc_rev(void)
+{
+	return (rt305x_get_soc_id() & CHIP_ID_REV_MASK);
+}
+
+static const char __init *rt305x_get_soc_id_name(void)
+{
+	if (soc_is_rt3050())
+		return "rt3050";
+	else if (soc_is_rt3052())
+		return "rt3052";
+	else if (soc_is_rt3350())
+		return "rt3350";
+	else if (soc_is_rt3352())
+		return "rt3352";
+	else if (soc_is_rt5350())
+		return "rt5350";
+	else
+		return "invalid";
+}
+
+static int __init rt305x_soc_dev_init(void)
+{
+	struct soc_device *soc_dev;
+	struct soc_device_attribute *soc_dev_attr;
+
+	soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
+	if (!soc_dev_attr)
+		return -ENOMEM;
+
+	soc_dev_attr->family = "Ralink";
+	soc_dev_attr->soc_id = rt305x_get_soc_id_name();
+
+	soc_dev_attr->data = soc_info_ptr;
+
+	soc_dev = soc_device_register(soc_dev_attr);
+	if (IS_ERR(soc_dev)) {
+		kfree(soc_dev_attr);
+		return PTR_ERR(soc_dev);
+	}
+
+	return 0;
+}
+device_initcall(rt305x_soc_dev_init);
+
+void __init prom_soc_init(struct ralink_soc_info *soc_info)
+{
+	const char *name = rt305x_get_soc_name(soc_info);
 
 	snprintf(soc_info->sys_type, RAMIPS_SYS_TYPE_LEN,
 		"Ralink %s id:%u rev:%u",
 		name,
-		(id >> CHIP_ID_ID_SHIFT) & CHIP_ID_ID_MASK,
-		(id & CHIP_ID_REV_MASK));
+		rt305x_get_soc_ver(),
+		rt305x_get_soc_rev());
 
 	soc_info->mem_base = RT305X_SDRAM_BASE;
 	if (soc_is_rt5350()) {
@@ -198,4 +297,6 @@ void __init prom_soc_init(struct ralink_soc_info *soc_info)
 		soc_info->mem_size_min = RT3352_MEM_SIZE_MIN;
 		soc_info->mem_size_max = RT3352_MEM_SIZE_MAX;
 	}
+
+	soc_info_ptr = soc_info;
 }