From: Daniel Lezcano <daniel.lezcano@linaro.org>
Date: Tue, 28 Feb 2012 21:46:08 +0000 (+0100)
Subject: mfd : Check if the db8500 prcmu has pending irq
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=9ab492e12d588af7b05892c3744e8bdc2eace6d0;p=mv-sheeva.git

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 97341aa4025..4e27db841fa 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 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 a5915852176..926bdb3adc0 100644
--- 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 f8429cad0db..5c72c07e20e 100644
--- 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())