ARM: at91: pm: Simplify at91rm9200_standby (5a2d4f05) · Commits · 戴 / test

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

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