diff options
| -rw-r--r-- | drivers/mfd/db8500-prcmu.c | 12 | ||||
| -rw-r--r-- | drivers/mfd/dbx500-prcmu-regs.h | 2 | ||||
| -rw-r--r-- | include/linux/mfd/db8500-prcmu.h | 1 | ||||
| -rw-r--r-- | include/linux/mfd/dbx500-prcmu.h | 8 |
4 files changed, 23 insertions, 0 deletions
diff --git a/drivers/mfd/db8500-prcmu.c b/drivers/mfd/db8500-prcmu.c index 4e27db841fab..a1b3464cdba3 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 b9ab4ce62654..3a0bf91d7780 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 diff --git a/include/linux/mfd/db8500-prcmu.h b/include/linux/mfd/db8500-prcmu.h index 926bdb3adc0f..048a534fde38 100644 --- a/include/linux/mfd/db8500-prcmu.h +++ b/include/linux/mfd/db8500-prcmu.h @@ -585,6 +585,7 @@ int db8500_prcmu_gic_recouple(void); int db8500_prcmu_copy_gic_settings(void); bool db8500_prcmu_gic_pending_irq(void); bool db8500_prcmu_pending_irq(void); +bool db8500_prcmu_is_cpu_in_wfi(int cpu); void db8500_prcmu_enable_wakeups(u32 wakeups); int db8500_prcmu_set_epod(u16 epod_id, u8 epod_state); int db8500_prcmu_request_clock(u8 clock, bool enable); diff --git a/include/linux/mfd/dbx500-prcmu.h b/include/linux/mfd/dbx500-prcmu.h index 5c72c07e20e4..eaa99a021785 100644 --- a/include/linux/mfd/dbx500-prcmu.h +++ b/include/linux/mfd/dbx500-prcmu.h @@ -305,6 +305,14 @@ static inline bool prcmu_gic_pending_irq(void) return db8500_prcmu_gic_pending_irq(); } +static inline bool prcmu_is_cpu_in_wfi(int cpu) +{ + if (cpu_is_u5500()) + return -EINVAL; + else + return db8500_prcmu_is_cpu_in_wfi(cpu); +} + static inline int prcmu_copy_gic_settings(void) { if (cpu_is_u5500()) |