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mfd : Copy the db8500 gic setting to the prcmu

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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>
This commit is contained in:
Daniel Lezcano 2012-02-28 22:46:07 +01:00 committed by Samuel Ortiz
parent cc9a0f68d1
commit 9f60d33e18
3 changed files with 29 additions and 0 deletions
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20
drivers/mfd/db8500-prcmu.c
View File

@ -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)
{

1
include/linux/mfd/db8500-prcmu.h
View File

@ -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);

8
include/linux/mfd/dbx500-prcmu.h
View File

@ -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())