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authorHamish Guthrie <hcg@openwrt.org>2011-01-26 13:33:07 +0000
committerHamish Guthrie <hcg@openwrt.org>2011-01-26 13:33:07 +0000
commit3ed245510532f1cc7dbd83ac8b0e0da7dcc81638 (patch)
tree6556e379d995da85473a9eb3316993da1f432159 /target/linux/omap35xx
parent0cd2b87f95afcd21594f7b2d028423ebae5a45ae (diff)
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Add kernel patch to expose omap3 die id via sysfs
SVN-Revision: 25112
Diffstat (limited to 'target/linux/omap35xx')
-rw-r--r--target/linux/omap35xx/patches-2.6.36/001-expose_omap3_die_id.patch48
1 files changed, 48 insertions, 0 deletions
diff --git a/target/linux/omap35xx/patches-2.6.36/001-expose_omap3_die_id.patch b/target/linux/omap35xx/patches-2.6.36/001-expose_omap3_die_id.patch
new file mode 100644
index 0000000..6d3bed4
--- /dev/null
+++ b/target/linux/omap35xx/patches-2.6.36/001-expose_omap3_die_id.patch
@@ -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);