1diff --git a/arch/arm/mach-omap2/id.c b/arch/arm/mach-omap2/id.c 2index 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