ARM: tegra: flexible spare fuse read function

Change the spare fuse base from a definition to a variable.
It provides flexibilty to read spare fuse on different chip.

Signed-off-by: Danny Huang <dahuang@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>

1 files changed, 12 insertions, 7 deletions

diff --git a/arch/arm/mach-tegra/fuse.c b/arch/arm/mach-tegra/fuse.c
index 6c752e8f1f06..bd19c2f53a97 100644
--- a/arch/arm/mach-tegra/fuse.c
+++ b/arch/arm/mach-tegra/fuse.c
@@ -28,7 +28,8 @@
 #define FUSE_UID_LOW            0x108
 #define FUSE_UID_HIGH           0x10c
 #define FUSE_SKU_INFO           0x110
-#define FUSE_SPARE_BIT          0x200
+
+#define TEGRA20_FUSE_SPARE_BIT          0x200
 
 int tegra_sku_id;
 int tegra_cpu_process_id;
@@ -36,6 +37,8 @@ int tegra_core_process_id;
 int tegra_chip_id;
 enum tegra_revision tegra_revision;
 
+static int tegra_fuse_spare_bit;
+
 /* The BCT to use at boot is specified by board straps that can be read
  * through a APB misc register and decoded. 2 bits, i.e. 4 possible BCTs.
  */
@@ -56,14 +59,14 @@ static const char *tegra_revision_name[TEGRA_REVISION_MAX] = {
         [TEGRA_REVISION_A04]     = "A04",
 };
 
-static inline u32 tegra_fuse_readl(unsigned long offset)
+u32 tegra_fuse_readl(unsigned long offset)
 {
         return tegra_apb_readl(TEGRA_FUSE_BASE + offset);
 }
 
-static inline bool get_spare_fuse(int bit)
+bool tegra_spare_fuse(int bit)
 {
-        return tegra_fuse_readl(FUSE_SPARE_BIT + bit * 4);
+        return tegra_fuse_readl(tegra_fuse_spare_bit + bit * 4);
 }
 
 static enum tegra_revision tegra_get_revision(u32 id)
@@ -77,7 +80,7 @@ static enum tegra_revision tegra_get_revision(u32 id)
                 return TEGRA_REVISION_A02;
         case 3:
                 if (tegra_chip_id == TEGRA20 &&
-                        (get_spare_fuse(18) || get_spare_fuse(19)))
+                        (tegra_spare_fuse(18) || tegra_spare_fuse(19)))
                         return TEGRA_REVISION_A03p;
                 else
                         return TEGRA_REVISION_A03;
@@ -99,10 +102,12 @@ void tegra_init_fuse(void)
         reg = tegra_fuse_readl(FUSE_SKU_INFO);
         tegra_sku_id = reg & 0xFF;
 
-        reg = tegra_fuse_readl(FUSE_SPARE_BIT);
+        tegra_fuse_spare_bit = TEGRA20_FUSE_SPARE_BIT;
+
+        reg = tegra_fuse_readl(tegra_fuse_spare_bit);
         tegra_cpu_process_id = (reg >> 6) & 3;
 
-        reg = tegra_fuse_readl(FUSE_SPARE_BIT);
+        reg = tegra_fuse_readl(tegra_fuse_spare_bit);
         tegra_core_process_id = (reg >> 12) & 3;
 
         reg = tegra_apb_readl(TEGRA_APB_MISC_BASE + STRAP_OPT);