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MX31: Introduce get_reset_cause()

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Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Detlev Zundel <dzu@denx.de>
This commit is contained in:
Fabio Estevam 2011-04-18 07:38:11 +00:00 committed by Albert ARIBAUD
parent 4adaf9bf09
commit 25d8e1bb19
1 changed files with 28 additions and 1 deletions
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29
arch/arm/cpu/arm1136/mx31/generic.c
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@ -132,11 +132,38 @@ char *get_cpu_rev(void)
return "unknown";
}
char *get_reset_cause(void)
{
/* read RCSR register from CCM module */
struct clock_control_regs *ccm =
(struct clock_control_regs *)CCM_BASE;
u32 cause = readl(&ccm->rcsr) & 0x07;
switch (cause) {
case 0x0000:
return "POR";
break;
case 0x0001:
return "RST";
break;
case 0x0002:
return "WDOG";
break;
case 0x0006:
return "JTAG";
break;
default:
return "unknown reset";
}
}
#if defined(CONFIG_DISPLAY_CPUINFO)
int print_cpuinfo (void)
{
printf("CPU: Freescale i.MX31 rev %s at %d MHz\n",
printf("CPU: Freescale i.MX31 rev %s at %d MHz.",
get_cpu_rev(), mx31_get_mcu_main_clk() / 1000000);
printf("Reset cause: %s\n", get_reset_cause());
return 0;
}
#endif