target/linux/omap35xx/patches-2.6.36/001-expose_omap3_die_id.patch

   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);