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ARM: at91: pm: Simplify at91rm9200_standby 

Since 2008, AT91_MC_SDRAMC_LPR is set to 0 at kernel initialization. There
is no use saving, changing and restoring it.

Acked-by: Wenyou Yang <wenyou.yang@atmel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
This commit is contained in:
Alexandre Belloni 2017-02-01 21:32:43 +01:00
parent 65cc1a59d1
commit 5a2d4f053f
1 changed files with 3 additions and 8 deletions
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11
arch/arm/mach-at91/pm.c
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@ -222,20 +222,15 @@ static void at91_pm_set_standby(void (*at91_standby)(void))
*/
static void at91rm9200_standby(void)
{
u32 lpr = at91_ramc_read(0, AT91_MC_SDRAMC_LPR);
asm volatile(
"b 1f\n\t"
".align 5\n\t"
"1: mcr p15, 0, %0, c7, c10, 4\n\t"
" str %0, [%1, %2]\n\t"
" str %3, [%1, %4]\n\t"
" str %2, [%1, %3]\n\t"
" mcr p15, 0, %0, c7, c0, 4\n\t"
" str %5, [%1, %2]"
:
: "r" (0), "r" (pm_data.ramc[0]), "r" (AT91_MC_SDRAMC_LPR),
"r" (1), "r" (AT91_MC_SDRAMC_SRR),
"r" (lpr));
: "r" (0), "r" (pm_data.ramc[0]),
"r" (1), "r" (AT91_MC_SDRAMC_SRR));
}
/* We manage both DDRAM/SDRAM controllers, we need more than one value to