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bootcount_davinci: Switch to scratch register #2

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The RTC IP block here provides 3 scratch registers.  Currently when
using DeepSleep on am335x the scratch0/1 registers are used so moving
ourself to scratch2 makes cooperation easier.

Signed-off-by: Tom Rini <trini@ti.com>
This commit is contained in:
Tom Rini 2013-08-28 09:00:29 -04:00
parent 155d424a9a
commit 22ee397504
1 changed files with 6 additions and 4 deletions
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10
drivers/bootcount/bootcount_davinci.c
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@ -20,17 +20,19 @@ void bootcount_store(ulong a)
*/
writel(RTC_KICK0R_WE, &reg->kick0r);
writel(RTC_KICK1R_WE, &reg->kick1r);
raw_bootcount_store(&reg->scratch0, a);
raw_bootcount_store(&reg->scratch1, BOOTCOUNT_MAGIC);
raw_bootcount_store(&reg->scratch2,
(BOOTCOUNT_MAGIC & 0xffff0000) | (a & 0x0000ffff));
}
ulong bootcount_load(void)
{
unsigned long val;
struct davinci_rtc *reg =
(struct davinci_rtc *)CONFIG_SYS_BOOTCOUNT_ADDR;
if (raw_bootcount_load(&reg->scratch1) != BOOTCOUNT_MAGIC)
val = raw_bootcount_load(&reg->scratch2);
if ((val & 0xffff0000) != (BOOTCOUNT_MAGIC & 0xffff0000))
return 0;
else
return raw_bootcount_load(&reg->scratch0);
return val & 0x0000ffff;
}