1 files changed, 39 insertions, 13 deletions

diff --git a/arch/arm/mach-tegra/fuse.c b/arch/arm/mach-tegra/fuse.c
index 0b7db174a5d..8121742711f 100644
--- a/arch/arm/mach-tegra/fuse.c
+++ b/arch/arm/mach-tegra/fuse.c
@@ -21,22 +21,28 @@
 #include <linux/io.h>
 #include <linux/export.h>
 
-#include <mach/iomap.h>
-
 #include "fuse.h"
+#include "iomap.h"
 #include "apbio.h"
 
 #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
+#define TEGRA30_FUSE_SPARE_BIT		0x244
 
 int tegra_sku_id;
 int tegra_cpu_process_id;
 int tegra_core_process_id;
 int tegra_chip_id;
+int tegra_cpu_speedo_id;		/* only exist in Tegra30 and later */
+int tegra_soc_speedo_id;
 enum tegra_revision tegra_revision;
 
+static int tegra_fuse_spare_bit;
+static void (*tegra_init_speedo_data)(void);
+
 /* 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.
  */
@@ -57,14 +63,14 @@ 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)
@@ -78,7 +84,7 @@ 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;
@@ -89,6 +95,16 @@ static enum tegra_revision tegra_get_revision(u32 id)
 	}
 }
 
+static void tegra_get_process_id(void)
+{
+	u32 reg;
+
+	reg = tegra_fuse_readl(tegra_fuse_spare_bit);
+	tegra_cpu_process_id = (reg >> 6) & 3;
+	reg = tegra_fuse_readl(tegra_fuse_spare_bit);
+	tegra_core_process_id = (reg >> 12) & 3;
+}
+
 void tegra_init_fuse(void)
 {
 	u32 id;
@@ -100,19 +116,29 @@ 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_cpu_process_id = (reg >> 6) & 3;
-
-	reg = tegra_fuse_readl(FUSE_SPARE_BIT);
-	tegra_core_process_id = (reg >> 12) & 3;
-
 	reg = tegra_apb_readl(TEGRA_APB_MISC_BASE + STRAP_OPT);
 	tegra_bct_strapping = (reg & RAM_ID_MASK) >> RAM_CODE_SHIFT;
 
 	id = readl_relaxed(IO_ADDRESS(TEGRA_APB_MISC_BASE) + 0x804);
 	tegra_chip_id = (id >> 8) & 0xff;
 
+	switch (tegra_chip_id) {
+	case TEGRA20:
+		tegra_fuse_spare_bit = TEGRA20_FUSE_SPARE_BIT;
+		tegra_init_speedo_data = &tegra20_init_speedo_data;
+		break;
+	case TEGRA30:
+		tegra_fuse_spare_bit = TEGRA30_FUSE_SPARE_BIT;
+		tegra_init_speedo_data = &tegra30_init_speedo_data;
+		break;
+	default:
+		pr_warn("Tegra: unknown chip id %d\n", tegra_chip_id);
+		tegra_fuse_spare_bit = TEGRA20_FUSE_SPARE_BIT;
+		tegra_init_speedo_data = &tegra_get_process_id;
+	}
+
 	tegra_revision = tegra_get_revision(id);
+	tegra_init_speedo_data();
 
 	pr_info("Tegra Revision: %s SKU: %d CPU Process: %d Core Process: %d\n",
 		tegra_revision_name[tegra_revision],