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Commit 9f60d33e authored by Daniel Lezcano's avatar Daniel Lezcano Committed by Samuel Ortiz
Browse files

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: default avatarDaniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent cc9a0f68

drivers/mfd/db8500-prcmu.c

+20 −0
Original line number Diff line number Diff line
@@ -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)

{

include/linux/mfd/db8500-prcmu.h

+1 −0
Original line number Diff line number Diff line
@@ -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);

include/linux/mfd/dbx500-prcmu.h

+8 −0
Original line number Diff line number Diff line
@@ -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())