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authorNishanth Menon <nm@ti.com>2014-03-28 11:00:05 -0500
committerTom Rini <trini@ti.com>2014-04-17 14:39:54 -0400
commit79e7e87f9156c9e89c4c11b1dd2edbbb26757f31 (patch)
tree70e3a2f2225d601618e1a3df2d6cd445c7a49c82
parent8a0c6d6fa9de22c0c148492a8759bb456d52887c (diff)
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omap3/sys_info: provide interface to read die id
introduce get_die_id() function which allows generation of information such as fake MAC address from the processor ID code. Signed-off-by: Nishanth Menon <nm@ti.com>
-rw-r--r--arch/arm/cpu/armv7/omap3/sys_info.c19
-rw-r--r--arch/arm/include/asm/arch-omap3/sys_proto.h1
2 files changed, 15 insertions, 5 deletions
diff --git a/arch/arm/cpu/armv7/omap3/sys_info.c b/arch/arm/cpu/armv7/omap3/sys_info.c
index 258786b..bef5f05 100644
--- a/arch/arm/cpu/armv7/omap3/sys_info.c
+++ b/arch/arm/cpu/armv7/omap3/sys_info.c
@@ -41,11 +41,23 @@ static char *rev_s_37xx[CPU_37XX_MAX_REV] = {
#endif /* CONFIG_DISPLAY_CPUINFO */
/*****************************************************************
+ * get_dieid(u32 *id) - read die ID
+ *****************************************************************/
+void get_dieid(u32 *id)
+{
+ struct ctrl_id *id_base = (struct ctrl_id *)OMAP34XX_ID_L4_IO_BASE;
+
+ id[3] = readl(&id_base->die_id_0);
+ id[2] = readl(&id_base->die_id_1);
+ id[1] = readl(&id_base->die_id_2);
+ id[0] = readl(&id_base->die_id_3);
+}
+
+/*****************************************************************
* dieid_num_r(void) - read and set die ID
*****************************************************************/
void dieid_num_r(void)
{
- struct ctrl_id *id_base = (struct ctrl_id *)OMAP34XX_ID_L4_IO_BASE;
char *uid_s, die_id[34];
u32 id[4];
@@ -54,10 +66,7 @@ void dieid_num_r(void)
uid_s = getenv("dieid#");
if (uid_s == NULL) {
- id[3] = readl(&id_base->die_id_0);
- id[2] = readl(&id_base->die_id_1);
- id[1] = readl(&id_base->die_id_2);
- id[0] = readl(&id_base->die_id_3);
+ get_dieid(id);
sprintf(die_id, "%08x%08x%08x%08x", id[0], id[1], id[2], id[3]);
setenv("dieid#", die_id);
uid_s = die_id;
diff --git a/arch/arm/include/asm/arch-omap3/sys_proto.h b/arch/arm/include/asm/arch-omap3/sys_proto.h
index 10300f4..75bf314 100644
--- a/arch/arm/include/asm/arch-omap3/sys_proto.h
+++ b/arch/arm/include/asm/arch-omap3/sys_proto.h
@@ -68,6 +68,7 @@ void make_cs1_contiguous(void);
void omap_nand_switch_ecc(uint32_t, uint32_t);
void power_init_r(void);
void dieid_num_r(void);
+void get_dieid(u32 *id);
void do_omap3_emu_romcode_call(u32 service_id, u32 parameters);
void omap3_gp_romcode_call(u32 service_id, u32 parameter);
u32 warm_reset(void);