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| author | Kevin Hilman <khilman@deeprootsystems.com> | 2009-03-21 03:37:21 +0300 |
|---|---|---|
| committer | Kevin Hilman <khilman@deeprootsystems.com> | 2009-04-23 20:27:59 +0400 |
| commit | e653034e66ec406f37427f588115badc6fc6af64 (patch) | |
| tree | d30b5486bf2ef34d4eab79f7632f95065c96a297 /arch/arm/mach-davinci/id.c | |
| parent | 9232fcc99948e39d5be04fc1c1025bd4f7998739 (diff) | |
| download | linux-e653034e66ec406f37427f588115badc6fc6af64.tar.xz | |
davinci: add runtime CPU detection support
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Diffstat (limited to 'arch/arm/mach-davinci/id.c')
| -rw-r--r-- | arch/arm/mach-davinci/id.c | 29 |
1 files changed, 26 insertions, 3 deletions
diff --git a/arch/arm/mach-davinci/id.c b/arch/arm/mach-davinci/id.c index bf067d604918..379f2baf66d6 100644 --- a/arch/arm/mach-davinci/id.c +++ b/arch/arm/mach-davinci/id.c @@ -17,6 +17,8 @@ #define JTAG_ID_BASE 0x01c40028 +static unsigned int davinci_revision; + struct davinci_id { u8 variant; /* JTAG ID bits 31:28 */ u16 part_no; /* JTAG ID bits 27:12 */ @@ -33,6 +35,20 @@ static struct davinci_id davinci_ids[] __initdata = { .manufacturer = 0x017, .type = 0x64460000, }, + { + /* DM646X */ + .part_no = 0xb770, + .variant = 0x0, + .manufacturer = 0x017, + .type = 0x64670000, + }, + { + /* DM355 */ + .part_no = 0xb73b, + .variant = 0x0, + .manufacturer = 0x00f, + .type = 0x03550000, + }, }; /* @@ -63,6 +79,12 @@ static u8 __init davinci_get_variant(void) return variant; } +unsigned int davinci_rev(void) +{ + return davinci_revision >> 16; +} +EXPORT_SYMBOL(davinci_rev); + void __init davinci_check_revision(void) { int i; @@ -75,7 +97,7 @@ void __init davinci_check_revision(void) /* First check only the major version in a safe way */ for (i = 0; i < ARRAY_SIZE(davinci_ids); i++) { if (part_no == (davinci_ids[i].part_no)) { - system_rev = davinci_ids[i].type; + davinci_revision = davinci_ids[i].type; break; } } @@ -84,10 +106,11 @@ void __init davinci_check_revision(void) for (i = 0; i < ARRAY_SIZE(davinci_ids); i++) { if (part_no == davinci_ids[i].part_no && variant == davinci_ids[i].variant) { - system_rev = davinci_ids[i].type; + davinci_revision = davinci_ids[i].type; break; } } - printk("DaVinci DM%04x variant 0x%x\n", system_rev >> 16, variant); + printk(KERN_INFO "DaVinci DM%04x variant 0x%x\n", + davinci_rev(), variant); } |