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mx6: soc: Switch to cold reset

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Disable the warm reset and enable the cold reset for a more reliable
restart ('reset'). This is taken from the Linux kernel, see imx_src_init()
in arch/arm/mach-imx/src.c.

Signed-off-by: Dirk Behme <dirk.behme@de.bosch.com>
This commit is contained in:
Dirk Behme 2015-03-09 14:48:48 +01:00 committed by Stefano Babic
parent 0c1842a01f
commit 9d16c52f62
1 changed files with 18 additions and 0 deletions
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18
arch/arm/cpu/armv7/mx6/soc.c
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@ -288,6 +288,22 @@ static void set_preclk_from_osc(void)
}
#endif
#define SRC_SCR_WARM_RESET_ENABLE 0
static void init_src(void)
{
struct src *src_regs = (struct src *)SRC_BASE_ADDR;
u32 val;
/*
* force warm reset sources to generate cold reset
* for a more reliable restart
*/
val = readl(&src_regs->scr);
val &= ~(1 << SRC_SCR_WARM_RESET_ENABLE);
writel(val, &src_regs->scr);
}
int arch_cpu_init(void)
{
init_aips();
@ -322,6 +338,8 @@ int arch_cpu_init(void)
mxs_dma_init();
#endif
init_src();
return 0;
}