2 files changed, 14 insertions, 7 deletions

diff --git a/arch/arm/mach-tegra/fuse.c b/arch/arm/mach-tegra/fuse.c
index 17fdd4086e6..e2dd342e0b3 100644
--- a/arch/arm/mach-tegra/fuse.c
+++ b/arch/arm/mach-tegra/fuse.c
@@ -33,6 +33,7 @@
 int tegra_sku_id;
 int tegra_cpu_process_id;
 int tegra_core_process_id;
+static int tegra_chip_id;
 enum tegra_revision tegra_revision;
 
 /* The BCT to use at boot is specified by board straps that can be read
@@ -65,12 +66,9 @@ static inline bool get_spare_fuse(int bit)
         return tegra_fuse_readl(FUSE_SPARE_BIT + bit * 4);
 }
 
-static enum tegra_revision tegra_get_revision(void)
+static enum tegra_revision tegra_get_revision(u32 id)
 {
-        void __iomem *chip_id = IO_ADDRESS(TEGRA_APB_MISC_BASE) + 0x804;
-        u32 id = readl(chip_id);
         u32 minor_rev = (id >> 16) & 0xf;
-        u32 chipid = (id >> 8) & 0xff;
 
         switch (minor_rev) {
         case 1:
@@ -78,7 +76,8 @@ static enum tegra_revision tegra_get_revision(void)
         case 2:
                 return TEGRA_REVISION_A02;
         case 3:
-                if (chipid == 0x20 && (get_spare_fuse(18) || get_spare_fuse(19)))
+                if (tegra_chip_id == TEGRA20 &&
+                        (get_spare_fuse(18) || get_spare_fuse(19)))
                         return TEGRA_REVISION_A03p;
                 else
                         return TEGRA_REVISION_A03;
@@ -91,6 +90,8 @@ static enum tegra_revision tegra_get_revision(void)
 
 void tegra_init_fuse(void)
 {
+        u32 id;
+
         u32 reg = readl(IO_TO_VIRT(TEGRA_CLK_RESET_BASE + 0x48));
         reg |= 1 << 28;
         writel(reg, IO_TO_VIRT(TEGRA_CLK_RESET_BASE + 0x48));
@@ -107,10 +108,13 @@ void tegra_init_fuse(void)
         reg = tegra_apb_readl(TEGRA_APB_MISC_BASE + STRAP_OPT);
         tegra_bct_strapping = (reg & RAM_ID_MASK) >> RAM_CODE_SHIFT;
 
-        tegra_revision = tegra_get_revision();
+        id = readl_relaxed(IO_ADDRESS(TEGRA_APB_MISC_BASE) + 0x804);
+        tegra_chip_id = (id >> 8) & 0xff;
+
+        tegra_revision = tegra_get_revision(id);
 
         pr_info("Tegra Revision: %s SKU: %d CPU Process: %d Core Process: %d\n",
-                tegra_revision_name[tegra_get_revision()],
+                tegra_revision_name[tegra_revision],
                 tegra_sku_id, tegra_cpu_process_id,
                 tegra_core_process_id);
 }
diff --git a/arch/arm/mach-tegra/fuse.h b/arch/arm/mach-tegra/fuse.h
index d65d2abf803..c55457281ee 100644
--- a/arch/arm/mach-tegra/fuse.h
+++ b/arch/arm/mach-tegra/fuse.h
@@ -35,6 +35,9 @@ enum tegra_revision {
 #define SKU_ID_AP25E    27
 #define SKU_ID_T25E     28
 
+#define TEGRA20         0x20
+#define TEGRA30         0x30
+
 extern int tegra_sku_id;
 extern int tegra_cpu_process_id;
 extern int tegra_core_process_id;