diff options
| author | Daniel Lezcano <daniel.lezcano@linaro.org> | 2012-02-28 22:46:07 +0100 |
|---|---|---|
| committer | Samuel Ortiz <sameo@linux.intel.com> | 2012-03-06 18:46:55 +0100 |
| commit | 9f60d33e1811e0aa696a3152050d6e3e4c3195aa (patch) | |
| tree | 7cf702dca14b1be0e310b6c45d2c71b32bce2aa2 | |
| parent | mfd : Check if there are pending irq on the db8500 gic (diff) | |
| download | linux-9f60d33e1811e0aa696a3152050d6e3e4c3195aa.tar.xz linux-9f60d33e1811e0aa696a3152050d6e3e4c3195aa.zip | |
mfd : Copy the db8500 gic setting to the prcmu
In the case we go to the retention mode, we decoupled the gic
in order to have the A9 core to reach a stable WFI state.
But we want the prcmu to wake up the A9 when the gic has a pending
irq which is done by copying the gic settings to the to the prcmu.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
| -rw-r--r-- | drivers/mfd/db8500-prcmu.c | 20 | ||||
| -rw-r--r-- | include/linux/mfd/db8500-prcmu.h | 1 | ||||
| -rw-r--r-- | include/linux/mfd/dbx500-prcmu.h | 8 |
3 files changed, 29 insertions, 0 deletions
diff --git a/drivers/mfd/db8500-prcmu.c b/drivers/mfd/db8500-prcmu.c index 8346a0e39949..97341aa4025c 100644 --- a/drivers/mfd/db8500-prcmu.c +++ b/drivers/mfd/db8500-prcmu.c @@ -883,6 +883,26 @@ bool db8500_prcmu_gic_pending_irq(void) return false; } +/* + * This function copies the gic SPI settings to the prcmu in order to + * monitor them and abort/finish the retention/off sequence or state. + */ +int db8500_prcmu_copy_gic_settings(void) +{ + u32 er; /* Enable register */ + void __iomem *dist_base = __io_address(U8500_GIC_DIST_BASE); + int i; + + /* We skip the STI and PPI */ + for (i = 0; i < PRCMU_GIC_NUMBER_REGS - 1; i++) { + er = readl_relaxed(dist_base + + GIC_DIST_ENABLE_SET + (i + 1) * 4); + writel(er, PRCM_ARMITMSK31TO0 + i * 4); + } + + return 0; +} + /* This function should only be called while mb0_transfer.lock is held. */ static void config_wakeups(void) { diff --git a/include/linux/mfd/db8500-prcmu.h b/include/linux/mfd/db8500-prcmu.h index 92dac13b9ee5..a5915852176a 100644 --- a/include/linux/mfd/db8500-prcmu.h +++ b/include/linux/mfd/db8500-prcmu.h @@ -582,6 +582,7 @@ int db8500_prcmu_set_power_state(u8 state, bool keep_ulp_clk, bool keep_ap_pll); u8 db8500_prcmu_get_power_state_result(void); int db8500_prcmu_gic_decouple(void); int db8500_prcmu_gic_recouple(void); +int db8500_prcmu_copy_gic_settings(void); bool db8500_prcmu_gic_pending_irq(void); void db8500_prcmu_enable_wakeups(u32 wakeups); int db8500_prcmu_set_epod(u16 epod_id, u8 epod_state); diff --git a/include/linux/mfd/dbx500-prcmu.h b/include/linux/mfd/dbx500-prcmu.h index 16418747dad1..f8429cad0db7 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 int prcmu_copy_gic_settings(void) +{ + if (cpu_is_u5500()) + return -EINVAL; + else + return db8500_prcmu_copy_gic_settings(); +} + static inline int prcmu_set_epod(u16 epod_id, u8 epod_state) { if (cpu_is_u5500()) |