mfd : Check if the db8500 prcmu has pending irq

This patch allows to check if there are some pending irqs
on 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 97341aa4025c3d152d6c6c75a3e457bfdc3ec610..4e27db841fabfa69a6e097622289a0941d21ee7b 100644 (file)
--- 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 checks if there are pending interrupt on the
+ * prcmu which has been delegated to monitor the irqs with the
+ * db8500_prcmu_copy_gic_settings function.
+ */
+bool db8500_prcmu_pending_irq(void)
+{
+       u32 it, im;
+       int i;
+
+       for (i = 0; i < PRCMU_GIC_NUMBER_REGS - 1; i++) {
+               it = readl(PRCM_ARMITVAL31TO0 + i * 4);
+               im = readl(PRCM_ARMITMSK31TO0 + i * 4);
+               if (it & im)
+                       return true; /* There is a pending interrupt */
+       }
+
+       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.

diff --git a/include/linux/mfd/db8500-prcmu.h b/include/linux/mfd/db8500-prcmu.h
index a5915852176ab7e08d0491bb30af7cf59145fb64..926bdb3adc0fb093601d15500f5a9fdb8259821a 100644 (file)
--- a/include/linux/mfd/db8500-prcmu.h
+++ b/include/linux/mfd/db8500-prcmu.h
@@ -584,6 +584,7 @@ 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);
+bool db8500_prcmu_pending_irq(void);
 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 f8429cad0db74d99fa234fe263e382e92776a609..5c72c07e20e47be1e2b08bdfd8771dc19db0dd58 100644 (file)
--- a/include/linux/mfd/dbx500-prcmu.h
+++ b/include/linux/mfd/dbx500-prcmu.h
@@ -313,6 +313,14 @@ static inline int prcmu_copy_gic_settings(void)
                return db8500_prcmu_copy_gic_settings();
 }
 
+static inline bool prcmu_pending_irq(void)
+{
+        if (cpu_is_u5500())
+                return -EINVAL;
+        else
+                return db8500_prcmu_pending_irq();
+}
+
 static inline int prcmu_set_epod(u16 epod_id, u8 epod_state)
 {
        if (cpu_is_u5500())