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Commit ef7dcaf1 authored by Aaron Wu's avatar Aaron Wu Committed by Steven Miao
Browse files

pm: sometimes wake up from suspend to RAM would fail 



Sometimes it fails to wake up from suspend to RAM, this is because
we would flush the data cache by assemble command FLUSHINV before
suspend to RAM, and there is a delay between this command execution
and cache flush completion. Add a 1uS delay to works around this.

Signed-off-by: default avatarAaron Wu <Aaron.wu@analog.com>
parent bb717b33

arch/blackfin/mach-common/pm.c

+2 −0
Original line number Diff line number Diff line
@@ -14,6 +14,7 @@ 
#include <linux/slab.h>

#include <linux/io.h>

#include <linux/irq.h>

#include <linux/delay.h>



#include <asm/cplb.h>

#include <asm/gpio.h>
@@ -180,6 +181,7 @@ int bfin_pm_suspend_mem_enter(void) 


#if defined(CONFIG_BFIN_EXTMEM_WRITEBACK) || defined(CONFIG_BFIN_L2_WRITEBACK)

	flushinv_all_dcache();

	udelay(1);

#endif

	_disable_dcplb();

	_disable_icplb();