From: Eduardo Valentin <eduardo.valentin@xxxxxxxxx>
This patch exports the OMAP3 IDCODE, Production ID and Die ID to userspace
via /proc/cpuinfo using the system_soc_info.
This can be used to track down silicon specific issues. The info is
exported via /proc/cpuinfo because then it can be possible to include this
in corematic dumps.
This is based on Peter De Schrijver patch, which export same info via sysfs.
Signed-off-by: Eduardo Valentin <eduardo.valentin@xxxxxxxxx>
---
arch/arm/mach-omap2/id.c | 20 ++++++++++++++++++++
1 files changed, 20 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-omap2/id.c b/arch/arm/mach-omap2/id.c
index 75e36a5..887787d 100644
--- a/arch/arm/mach-omap2/id.c
+++ b/arch/arm/mach-omap2/id.c
@@ -76,6 +76,10 @@ EXPORT_SYMBOL(omap_type);
/*----------------------------------------------------------------------------*/
#define OMAP_TAP_IDCODE 0x0204
+#define OMAP_TAP_PROD_ID_0 0x0208
+#define OMAP_TAP_PROD_ID_1 0x020c
+#define OMAP_TAP_PROD_ID_2 0x0210
+#define OMAP_TAP_PROD_ID_3 0x0214
#define OMAP_TAP_DIE_ID_0 0x0218
#define OMAP_TAP_DIE_ID_1 0x021C
#define OMAP_TAP_DIE_ID_2 0x0220
@@ -306,6 +310,7 @@ void __init omap4_check_revision(void)
void __init omap3_cpuinfo(void)
{
+ int sz;
u8 rev = GET_OMAP_REVISION();
char cpu_name[16], cpu_rev[16];
@@ -375,6 +380,21 @@ void __init omap3_cpuinfo(void)
OMAP3_SHOW_FEATURE(192mhz_clk);
printk(")\n");
+
+ /* Append OMAP3 IDCODE, Production ID and Die ID to system_soc_info */
+ sz = strlen(system_soc_info);
+ snprintf(system_soc_info + sz, SYSTEM_SOC_INFO_SIZE - sz,
+ "\n\tIDCODE\t: %08x\n\tPr. ID\t: %08x %08x %08x %08x\n"
+ "\tDie ID\t: %08x %08x %08x %08x\n",
+ read_tap_reg(OMAP_TAP_IDCODE),
+ read_tap_reg(OMAP_TAP_PROD_ID_0),
+ read_tap_reg(OMAP_TAP_PROD_ID_1),
+ read_tap_reg(OMAP_TAP_PROD_ID_2),
+ read_tap_reg(OMAP_TAP_PROD_ID_3),
+ 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));
}
/*
--
1.7.0.4.361.g8b5fe.dirty
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