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-rw-r--r--arch/arm/common/gic.c47
1 files changed, 47 insertions, 0 deletions
diff --git a/arch/arm/common/gic.c b/arch/arm/common/gic.c
index e21c1f4218d3..cb6b041c39d2 100644
--- a/arch/arm/common/gic.c
+++ b/arch/arm/common/gic.c
@@ -44,6 +44,19 @@ struct gic_chip_data {
void __iomem *cpu_base;
};
+/*
+ * Supported arch specific GIC irq extension.
+ * Default make them NULL.
+ */
+struct irq_chip gic_arch_extn = {
+ .irq_ack = NULL,
+ .irq_mask = NULL,
+ .irq_unmask = NULL,
+ .irq_retrigger = NULL,
+ .irq_set_type = NULL,
+ .irq_set_wake = NULL,
+};
+
#ifndef MAX_GIC_NR
#define MAX_GIC_NR 1
#endif
@@ -74,6 +87,8 @@ static inline unsigned int gic_irq(struct irq_data *d)
static void gic_ack_irq(struct irq_data *d)
{
spin_lock(&irq_controller_lock);
+ if (gic_arch_extn.irq_ack)
+ gic_arch_extn.irq_ack(d);
writel(gic_irq(d), gic_cpu_base(d) + GIC_CPU_EOI);
spin_unlock(&irq_controller_lock);
}
@@ -84,6 +99,8 @@ static void gic_mask_irq(struct irq_data *d)
spin_lock(&irq_controller_lock);
writel(mask, gic_dist_base(d) + GIC_DIST_ENABLE_CLEAR + (gic_irq(d) / 32) * 4);
+ if (gic_arch_extn.irq_mask)
+ gic_arch_extn.irq_mask(d);
spin_unlock(&irq_controller_lock);
}
@@ -92,6 +109,8 @@ static void gic_unmask_irq(struct irq_data *d)
u32 mask = 1 << (d->irq % 32);
spin_lock(&irq_controller_lock);
+ if (gic_arch_extn.irq_unmask)
+ gic_arch_extn.irq_unmask(d);
writel(mask, gic_dist_base(d) + GIC_DIST_ENABLE_SET + (gic_irq(d) / 32) * 4);
spin_unlock(&irq_controller_lock);
}
@@ -116,6 +135,9 @@ static int gic_set_type(struct irq_data *d, unsigned int type)
spin_lock(&irq_controller_lock);
+ if (gic_arch_extn.irq_set_type)
+ gic_arch_extn.irq_set_type(d, type);
+
val = readl(base + GIC_DIST_CONFIG + confoff);
if (type == IRQ_TYPE_LEVEL_HIGH)
val &= ~confmask;
@@ -141,6 +163,14 @@ static int gic_set_type(struct irq_data *d, unsigned int type)
return 0;
}
+static int gic_retrigger(struct irq_data *d)
+{
+ if (gic_arch_extn.irq_retrigger)
+ return gic_arch_extn.irq_retrigger(d);
+
+ return -ENXIO;
+}
+
#ifdef CONFIG_SMP
static int gic_set_affinity(struct irq_data *d, const struct cpumask *mask_val,
bool force)
@@ -166,6 +196,21 @@ static int gic_set_affinity(struct irq_data *d, const struct cpumask *mask_val,
}
#endif
+#ifdef CONFIG_PM
+static int gic_set_wake(struct irq_data *d, unsigned int on)
+{
+ int ret = -ENXIO;
+
+ if (gic_arch_extn.irq_set_wake)
+ ret = gic_arch_extn.irq_set_wake(d, on);
+
+ return ret;
+}
+
+#else
+#define gic_set_wake NULL
+#endif
+
static void gic_handle_cascade_irq(unsigned int irq, struct irq_desc *desc)
{
struct gic_chip_data *chip_data = get_irq_data(irq);
@@ -201,9 +246,11 @@ static struct irq_chip gic_chip = {
.irq_mask = gic_mask_irq,
.irq_unmask = gic_unmask_irq,
.irq_set_type = gic_set_type,
+ .irq_retrigger = gic_retrigger,
#ifdef CONFIG_SMP
.irq_set_affinity = gic_set_affinity,
#endif
+ .irq_set_wake = gic_set_wake,
};
void __init gic_cascade_irq(unsigned int gic_nr, unsigned int irq)