diff options
| author | Daniel Lezcano <daniel.lezcano@linaro.org> | 2012-02-28 22:46:09 +0100 |
|---|---|---|
| committer | Samuel Ortiz <sameo@linux.intel.com> | 2012-03-06 18:46:56 +0100 |
| commit | 34fe6f107eab096ac2f70a51763e9978b4abbeb6 (patch) | |
| tree | 481a045f80276c3a0e0d512fefe1eeabb058588d /drivers | |
| parent | 9ab492e12d588af7b05892c3744e8bdc2eace6d0 (diff) | |
mfd : Check if the other db8500 core is in WFI
This patch allows to check if the other core is in WFI
mode. It is the last check the idle routine has to do before
entering into the retention state.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mfd/db8500-prcmu.c | 12 | ||||
| -rw-r--r-- | drivers/mfd/dbx500-prcmu-regs.h | 2 |
2 files changed, 14 insertions, 0 deletions
diff --git a/drivers/mfd/db8500-prcmu.c b/drivers/mfd/db8500-prcmu.c index 4e27db841fa..a1b3464cdba 100644 --- a/drivers/mfd/db8500-prcmu.c +++ b/drivers/mfd/db8500-prcmu.c @@ -904,6 +904,18 @@ bool db8500_prcmu_pending_irq(void) } /* + * This function checks if the specified cpu is in in WFI. It's usage + * makes sense only if the gic is decoupled with the db8500_prcmu_gic_decouple + * function. Of course passing smp_processor_id() to this function will + * always return false... + */ +bool db8500_prcmu_is_cpu_in_wfi(int cpu) +{ + return readl(PRCM_ARM_WFI_STANDBY) & cpu ? PRCM_ARM_WFI_STANDBY_WFI1 : + PRCM_ARM_WFI_STANDBY_WFI0; +} + +/* * This function copies the gic SPI settings to the prcmu in order to * monitor them and abort/finish the retention/off sequence or state. */ diff --git a/drivers/mfd/dbx500-prcmu-regs.h b/drivers/mfd/dbx500-prcmu-regs.h index b9ab4ce6265..3a0bf91d778 100644 --- a/drivers/mfd/dbx500-prcmu-regs.h +++ b/drivers/mfd/dbx500-prcmu-regs.h @@ -79,6 +79,8 @@ /* ARM WFI Standby signal register */ #define PRCM_ARM_WFI_STANDBY (_PRCMU_BASE + 0x130) +#define PRCM_ARM_WFI_STANDBY_WFI0 0x08 +#define PRCM_ARM_WFI_STANDBY_WFI1 0x10 #define PRCM_IOCR (_PRCMU_BASE + 0x310) #define PRCM_IOCR_IOFORCE 0x1 |