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>
diff --git a/drivers/mfd/db8500-prcmu.c b/drivers/mfd/db8500-prcmu.c
index 8346a0e..97341aa 100644
--- a/drivers/mfd/db8500-prcmu.c
+++ b/drivers/mfd/db8500-prcmu.c
@@ -883,6 +883,26 @@
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 92dac13..a591585 100644
--- a/include/linux/mfd/db8500-prcmu.h
+++ b/include/linux/mfd/db8500-prcmu.h
@@ -582,6 +582,7 @@
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 1641874..f8429ca 100644
--- a/include/linux/mfd/dbx500-prcmu.h
+++ b/include/linux/mfd/dbx500-prcmu.h
@@ -305,6 +305,14 @@
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())