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ARM: mx25: Print the source of reset
Print the source of reset during boot. Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
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1 changed files with 24 additions and 1 deletions
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@ -105,6 +105,28 @@ ulong imx_get_perclk (int clk)
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return lldiv (fref, div);
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}
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static char *get_reset_cause(void)
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{
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/* read RCSR register from CCM module */
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struct ccm_regs *ccm =
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(struct ccm_regs *)IMX_CCM_BASE;
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u32 cause = readl(&ccm->rcsr) & 0x0f;
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if (cause == 0)
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return "POR";
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else if (cause == 1)
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return "RST";
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else if ((cause & 2) == 2)
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return "WDOG";
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else if ((cause & 4) == 4)
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return "SW RESET";
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else if ((cause & 8) == 8)
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return "JTAG";
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else
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return "unknown reset";
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}
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u32 get_cpu_rev(void)
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{
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@ -136,10 +158,11 @@ int print_cpuinfo (void)
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char buf[32];
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u32 cpurev = get_cpu_rev();
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printf("CPU: Freescale i.MX25 rev%d.%d%s at %s MHz\n\n",
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printf("CPU: Freescale i.MX25 rev%d.%d%s at %s MHz\n",
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(cpurev & 0xF0) >> 4, (cpurev & 0x0F),
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((cpurev & 0x8000) ? " unknown" : ""),
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strmhz (buf, imx_get_armclk ()));
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printf("Reset cause: %s\n\n", get_reset_cause());
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return 0;
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}
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#endif
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