blob: d262972d1e509e1f6f93eb3585205dcac0b7ed5b (
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diff -Naru orig/board/at91sam9x5ek/at91sam9x5ek.c new/board/at91sam9x5ek/at91sam9x5ek.c
--- orig/board/at91sam9x5ek/at91sam9x5ek.c 2018-01-04 18:06:52.533763774 -0600
+++ new/board/at91sam9x5ek/at91sam9x5ek.c 2018-01-04 18:32:57.905717432 -0600
@@ -44,6 +44,18 @@
#include "at91sam9x5ek.h"
#include "board_hw_info.h"
+#define RTC_SCCR 0x1C
+#define RTC_IDR 0x24
+
+static void at91_disable_rtc(void)
+{
+ /* disable all RTC interrupts and clear status register.
+ * Prevents possible Linux lockup due to unexpected RTC interrupt
+ */
+ writel(0xFF, RTC_IDR + AT91C_BASE_RTC);
+ writel(0xFF, RTC_SCCR + AT91C_BASE_RTC);
+}
+
static void at91_dbgu_hw_init(void)
{
/* Configure DBGU pins */
@@ -161,6 +173,9 @@
#ifdef CONFIG_HW_INIT
void hw_init(void)
{
+ /* 1st chance to disable RTC */
+ at91_disable_rtc();
+
/* Disable watchdog */
at91_disable_wdt();
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