MX31 Reference Manual states the following possible values for the silicon
revision:
.srev = 0x00,
.srev = 0x10,
.srev = 0x11,
.srev = 0x12,
.srev = 0x13,
.srev = 0x14,
.srev = 0x15,
.srev = 0x28,
.srev = 0x29,
However it is possible to find some pre-production silicon on some old
hardware, such as MX31ADS
that shows srev = 0x20.
The following message is the currently displayed on such MX31ADS board:
CPU: Freescale i.MX31 rev 2.0 unknown at 531 MHz.Reset cause: WDOG
With this patch we see a better message like:
CPU: Freescale i.MX31 rev 0.0 (unknown revision) at 531 MHz.Reset cause: WDOG
Reported-by: Felix Radensky <fe...@embedded-sol.com>
Signed-off-by: Fabio Estevam <fabio.este...@freescale.com>
---
arch/arm/cpu/arm1136/mx31/generic.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/arm/cpu/arm1136/mx31/generic.c
b/arch/arm/cpu/arm1136/mx31/generic.c
index 4ebf38d..770d359 100644
--- a/arch/arm/cpu/arm1136/mx31/generic.c
+++ b/arch/arm/cpu/arm1136/mx31/generic.c
@@ -130,7 +130,7 @@ u32 get_cpu_rev(void)
if (srev == mx31_cpu_type[i].srev)
return mx31_cpu_type[i].v;
- return srev | 0x8000;
+ return 0x8000;
}
static char *get_reset_cause(void)
@@ -162,7 +162,7 @@ int print_cpuinfo (void)
printf("CPU: Freescale i.MX31 rev %d.%d%s at %d MHz.",
(srev & 0xF0) >> 4, (srev & 0x0F),
- ((srev & 0x8000) ? " unknown" : ""),
+ ((srev & 0x8000) ? " (unknown revision)" : ""),
mx31_get_mcu_main_clk() / 1000000);
printf("Reset cause: %s\n", get_reset_cause());
return 0;
--
1.6.0.4
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