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ARM: tegra: flexible spare fuse read function

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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>
This commit is contained in:
Danny Huang 2012-11-15 15:42:32 +08:00 committed by Stephen Warren
parent fd072a86bd
commit 1f851a262b
2 changed files with 14 additions and 7 deletions
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19
arch/arm/mach-tegra/fuse.c
View file

@ -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);

2
arch/arm/mach-tegra/fuse.h
View file

@ -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