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Commit 5a2d4f05 authored by Alexandre Belloni's avatar Alexandre Belloni
Browse files

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: default avatarWenyou Yang <wenyou.yang@atmel.com>
Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@free-electrons.com>
parent 65cc1a59

arch/arm/mach-at91/pm.c

+3 −8
Original line number Diff line number Diff line
@@ -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