23 lines
585 B
C
23 lines
585 B
C
/*
|
|
* Copyright (C) 2013 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
|
|
*
|
|
* Under GPLv2 only
|
|
*/
|
|
|
|
#include <io.h>
|
|
#include <mach/at91_rtt.h>
|
|
|
|
/*
|
|
* As the RTT is powered by the backup power so if the interrupt
|
|
* is still on when the kernel start, the kernel will end up with
|
|
* dead lock interrupt that it can not clear. Because the interrupt line is
|
|
* shared with the basic timer (PIT) on AT91_ID_SYS.
|
|
*/
|
|
void at91_rtt_irq_fixup(void *base)
|
|
{
|
|
void __iomem *reg = base + AT91_RTT_MR;
|
|
u32 mr = readl(reg);
|
|
|
|
writel(mr & ~(AT91_RTT_ALMIEN | AT91_RTT_RTTINCIEN), reg);
|
|
}
|