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| author | Danny Huang <dahuang@nvidia.com> | 2012-11-15 15:42:32 +0800 |
|---|---|---|
| committer | Stephen Warren <swarren@nvidia.com> | 2012-11-15 14:16:46 -0700 |
| commit | 1f851a262baf7cbd4096d4d279c73cb697021773 (patch) | |
| tree | 02374f20236ff7a38b27c716d6bbafd104a9199c /arch/arm/mach-tegra | |
| parent | fd072a86bde1c5f7cf04618903c5ce8658011c1c (diff) | |
| download | op-kernel-dev-1f851a262baf7cbd4096d4d279c73cb697021773.zip op-kernel-dev-1f851a262baf7cbd4096d4d279c73cb697021773.tar.gz | |
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>
Diffstat (limited to 'arch/arm/mach-tegra')
| -rw-r--r-- | arch/arm/mach-tegra/fuse.c | 19 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/fuse.h | 2 |
2 files changed, 14 insertions, 7 deletions
diff --git a/arch/arm/mach-tegra/fuse.c b/arch/arm/mach-tegra/fuse.c index 6c752e8..bd19c2f 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); diff --git a/arch/arm/mach-tegra/fuse.h b/arch/arm/mach-tegra/fuse.h index d2107b2..aef1223 100644 --- a/arch/arm/mach-tegra/fuse.h +++ b/arch/arm/mach-tegra/fuse.h @@ -48,5 +48,7 @@ extern int tegra_bct_strapping; unsigned long long tegra_chip_uid(void); void tegra_init_fuse(void); +bool tegra_spare_fuse(int bit); +u32 tegra_fuse_readl(unsigned long offset); #endif |
