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[ARM] pxa: add ability to set suspend mode 

PXA processors have several low-power modes. Currently kernel supports
only one of these modes for PM_SUSPEND_MEM.

This patch adds ability to set desired suspend mode for PXA27x based
machines.

Signed-off-by: Mike Rapoport <mike@compulab.co.il>
Reviewed-by: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Eric Miao <eric.miao@marvell.com>
This commit is contained in:
Mike Rapoport 2009-05-26 09:10:18 +03:00 committed by Eric Miao
parent 94c35a6b51
commit d082d36ea8
2 changed files with 21 additions and 1 deletions
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3
arch/arm/mach-pxa/include/mach/pxa27x.h
View File

@ -16,4 +16,7 @@
#define ARB_DMA_PARK (1<<25) /* Be parked with DMA when idle */
#define ARB_CORE_PARK (1<<24) /* Be parked with core when idle */
#define ARB_LOCK_FLAG (1<<23) /* Only Locking masters gain access to the bus */
extern int __init pxa27x_set_pwrmode(unsigned int mode);
#endif /* __MACH_PXA27x_H */

19
arch/arm/mach-pxa/pxa27x.c
View File

@ -203,6 +203,23 @@ static struct clk_lookup pxa27x_clkregs[] = {
#define SAVE(x) sleep_save[SLEEP_SAVE_##x] = x
#define RESTORE(x) x = sleep_save[SLEEP_SAVE_##x]
/*
* allow platforms to override default PWRMODE setting used for PM_SUSPEND_MEM
*/
static unsigned int pwrmode = PWRMODE_SLEEP;
int __init pxa27x_set_pwrmode(unsigned int mode)
{
switch (mode) {
case PWRMODE_SLEEP:
case PWRMODE_DEEPSLEEP:
pwrmode = mode;
return 0;
}
return -EINVAL;
}
/*
* List of global PXA peripheral registers to preserve.
* More ones like CP and general purpose register values are preserved
@ -254,7 +271,7 @@ void pxa27x_cpu_pm_enter(suspend_state_t state)
pxa_cpu_standby();
break;
case PM_SUSPEND_MEM:
pxa27x_cpu_suspend(PWRMODE_SLEEP);
pxa27x_cpu_suspend(pwrmode);
break;
}
}