From aca804c9ddadbf34a8ff82779e5598ec5e319f23 Mon Sep 17 00:00:00 2001
From: Dominik Sliwa <dominik.sliwa@toradex.com>
Date: Tue, 19 Jun 2018 14:51:39 +0200
Subject: apalis-tk1: apalis_t30: colibri_t30: display reset reason

Signed-off-by: Dominik Sliwa <dominik.sliwa@toradex.com>
Acked-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
---
 arch/arm/mach-tegra/sys_info.c | 34 +++++++++++++++++++++++-----------
 1 file changed, 23 insertions(+), 11 deletions(-)

diff --git a/arch/arm/mach-tegra/sys_info.c b/arch/arm/mach-tegra/sys_info.c
index 5933c35ddd..4fa25be1fa 100644
--- a/arch/arm/mach-tegra/sys_info.c
+++ b/arch/arm/mach-tegra/sys_info.c
@@ -7,24 +7,36 @@
 
 #include <common.h>
 #include <linux/ctype.h>
+#if defined(CONFIG_TEGRA124) || defined(CONFIG_TEGRA30)
+#include <asm/arch-tegra/pmc.h>
 
-static void upstring(char *s)
+static char *get_reset_cause(void)
 {
-	while (*s) {
-		*s = toupper(*s);
-		s++;
-	}
+        struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
+
+        switch (pmc->pmc_reset_status) {
+                case 0x00:
+                        return "POR";
+                case 0x01:
+                        return "WATCHDOG";
+                case 0x02:
+                        return "SENSOR";
+                case 0x03:
+                        return "SW_MAIN";
+                case 0x04:
+                        return "LP0";
+        }
+        return "UNKNOWN";
 }
+#endif
 
 /* Print CPU information */
 int print_cpuinfo(void)
 {
-	char soc_name[10];
-
-	strncpy(soc_name, CONFIG_SYS_SOC, 10);
-	upstring(soc_name);
-	puts(soc_name);
-	puts("\n");
+	printf("SoC: %s\n", CONFIG_SYS_SOC);
+#if defined(CONFIG_TEGRA124) || defined(CONFIG_TEGRA30)
+	printf("Reset cause: %s\n", get_reset_cause());
+#endif
 
 	/* TBD: Add printf of major/minor rev info, stepping, etc. */
 	return 0;
-- 
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