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Add kernel patch to expose omap3 die id via sysfs

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SVN-Revision: 25112
This commit is contained in:
Hamish Guthrie 2011-01-26 13:33:07 +00:00
parent 0cd2b87f95
commit 3ed2455105
1 changed files with 48 additions and 0 deletions
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48
target/linux/omap35xx/patches-2.6.36/001-expose_omap3_die_id.patch Normal file
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@ -0,0 +1,48 @@
diff --git a/arch/arm/mach-omap2/id.c b/arch/arm/mach-omap2/id.c
index 9a879f9..9cefef4 100644
--- a/arch/arm/mach-omap2/id.c
+++ b/arch/arm/mach-omap2/id.c
@@ -85,6 +85,9 @@ EXPORT_SYMBOL(omap_type);
#define read_tap_reg(reg) __raw_readl(tap_base + (reg))
+static ssize_t die_id_show(struct kobject *, struct kobj_attribute *, char *);
+static struct kobj_attribute die_id_attr = __ATTR(die_id, 0444, die_id_show, NULL);
+
struct omap_id {
u16 hawkeye; /* Silicon type (Hawkeye id) */
u8 dev; /* Device type from production_id reg */
@@ -104,6 +107,17 @@ static struct omap_id omap_ids[] __initdata = {
static void __iomem *tap_base;
static u16 tap_prod_id;
+static ssize_t die_id_show(struct kobject *kobj, struct kobj_attribute *attr,
+ char *buf)
+{
+ return sprintf(buf, "Die ID: %08x%08x%08x%08x\n",
+ read_tap_reg(OMAP_TAP_DIE_ID_0),
+ read_tap_reg(OMAP_TAP_DIE_ID_1),
+ read_tap_reg(OMAP_TAP_DIE_ID_2),
+ read_tap_reg(OMAP_TAP_DIE_ID_3));
+
+}
+
void omap_get_die_id(struct omap_die_id *odi)
{
odi->id_0 = read_tap_reg(OMAP_TAP_DIE_ID_0);
@@ -457,3 +471,15 @@ void __init omap2_set_globals_tap(struct omap_globals *omap2_globals)
else
tap_prod_id = 0x0208;
}
+
+int __init export_omap_die_id(void)
+{
+ int error;
+
+ error = sysfs_create_file(power_kobj, &die_id_attr.attr);
+ if (error)
+ printk(KERN_ERR "sysfs_create_file failed: %d\n", error);
+ return error;
+}
+
+late_initcall(export_omap_die_id);