| 1 | diff --git a/arch/arm/mach-omap2/id.c b/arch/arm/mach-omap2/id.c |
| 2 | index 9a879f9..9cefef4 100644 |
| 3 | --- a/arch/arm/mach-omap2/id.c |
| 4 | +++ b/arch/arm/mach-omap2/id.c |
| 5 | @@ -85,6 +85,9 @@ EXPORT_SYMBOL(omap_type); |
| 6 | |
| 7 | #define read_tap_reg(reg) __raw_readl(tap_base + (reg)) |
| 8 | |
| 9 | +static ssize_t die_id_show(struct kobject *, struct kobj_attribute *, char *); |
| 10 | +static struct kobj_attribute die_id_attr = __ATTR(die_id, 0444, die_id_show, NULL); |
| 11 | + |
| 12 | struct omap_id { |
| 13 | u16 hawkeye; /* Silicon type (Hawkeye id) */ |
| 14 | u8 dev; /* Device type from production_id reg */ |
| 15 | @@ -104,6 +107,17 @@ static struct omap_id omap_ids[] __initdata = { |
| 16 | static void __iomem *tap_base; |
| 17 | static u16 tap_prod_id; |
| 18 | |
| 19 | +static ssize_t die_id_show(struct kobject *kobj, struct kobj_attribute *attr, |
| 20 | + char *buf) |
| 21 | +{ |
| 22 | + return sprintf(buf, "Die ID: %08x%08x%08x%08x\n", |
| 23 | + read_tap_reg(OMAP_TAP_DIE_ID_0), |
| 24 | + read_tap_reg(OMAP_TAP_DIE_ID_1), |
| 25 | + read_tap_reg(OMAP_TAP_DIE_ID_2), |
| 26 | + read_tap_reg(OMAP_TAP_DIE_ID_3)); |
| 27 | + |
| 28 | +} |
| 29 | + |
| 30 | void omap_get_die_id(struct omap_die_id *odi) |
| 31 | { |
| 32 | odi->id_0 = read_tap_reg(OMAP_TAP_DIE_ID_0); |
| 33 | @@ -457,3 +471,15 @@ void __init omap2_set_globals_tap(struct omap_globals *omap2_globals) |
| 34 | else |
| 35 | tap_prod_id = 0x0208; |
| 36 | } |
| 37 | + |
| 38 | +int __init export_omap_die_id(void) |
| 39 | +{ |
| 40 | + int error; |
| 41 | + |
| 42 | + error = sysfs_create_file(power_kobj, &die_id_attr.attr); |
| 43 | + if (error) |
| 44 | + printk(KERN_ERR "sysfs_create_file failed: %d\n", error); |
| 45 | + return error; |
| 46 | +} |
| 47 | + |
| 48 | +late_initcall(export_omap_die_id); |
| 49 | |
