[PATCH v4 1/5] ARM: EXYNOS: Add set_irq_affinity function for combiner_irq

[Chanho Park <chanho61.park@xxxxxxxxxxx>]

This patch adds set_irq_affinity function for combiner_irq. We need this
function to enable a arm-pmu because the pmu of exynos has combined type irqs.

Reviewed-by: Thomas Abraham <thomas.abraham@xxxxxxxxxx>
Signed-off-by: Chanho Park <chanho61.park@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
 arch/arm/mach-exynos/common.c |   30 +++++++++++++++++++++++++-----
 1 file changed, 25 insertions(+), 5 deletions(-)

diff --git a/arch/arm/mach-exynos/common.c b/arch/arm/mach-exynos/common.c
index 715b690..709245e 100644
--- a/arch/arm/mach-exynos/common.c
+++ b/arch/arm/mach-exynos/common.c
@@ -405,6 +405,7 @@ struct combiner_chip_data {
 	unsigned int irq_offset;
 	unsigned int irq_mask;
 	void __iomem *base;
+	unsigned int parent_irq;
 };
 
 static struct irq_domain *combiner_irq_domain;
@@ -461,10 +462,28 @@ static void combiner_handle_cascade_irq(unsigned int irq, struct irq_desc *desc)
 	chained_irq_exit(chip, desc);
 }
 
+#ifdef CONFIG_SMP
+static int combiner_set_affinity(struct irq_data *d,
+				 const struct cpumask *mask_val, bool force)
+{
+	struct combiner_chip_data *chip_data = irq_data_get_irq_chip_data(d);
+	struct irq_chip *chip = irq_get_chip(chip_data->parent_irq);
+	struct irq_data *data = irq_get_irq_data(chip_data->parent_irq);
+
+	if (chip && chip->irq_set_affinity)
+		return chip->irq_set_affinity(data, mask_val, force);
+	else
+		return -EINVAL;
+}
+#endif
+
 static struct irq_chip combiner_chip = {
-	.name		= "COMBINER",
-	.irq_mask	= combiner_mask_irq,
-	.irq_unmask	= combiner_unmask_irq,
+	.name			= "COMBINER",
+	.irq_mask		= combiner_mask_irq,
+	.irq_unmask		= combiner_unmask_irq,
+#ifdef CONFIG_SMP
+	.irq_set_affinity	= combiner_set_affinity,
+#endif
 };
 
 static void __init combiner_cascade_irq(unsigned int combiner_nr, unsigned int irq)
@@ -484,12 +503,13 @@ static void __init combiner_cascade_irq(unsigned int combiner_nr, unsigned int i
 }
 
 static void __init combiner_init_one(unsigned int combiner_nr,
-				     void __iomem *base)
+				     void __iomem *base, unsigned int irq)
 {
 	combiner_data[combiner_nr].base = base;
 	combiner_data[combiner_nr].irq_offset = irq_find_mapping(
 		combiner_irq_domain, combiner_nr * MAX_IRQ_IN_COMBINER);
 	combiner_data[combiner_nr].irq_mask = 0xff << ((combiner_nr % 4) << 3);
+	combiner_data[combiner_nr].parent_irq = irq;
 
 	/* Disable all interrupts */
 	__raw_writel(combiner_data[combiner_nr].irq_mask,
@@ -573,12 +593,12 @@ static void __init combiner_init(void __iomem *combiner_base,
 	}
 
 	for (i = 0; i < max_nr; i++) {
-		combiner_init_one(i, combiner_base + (i >> 2) * 0x10);
 		irq = IRQ_SPI(i);
 #ifdef CONFIG_OF
 		if (np)
 			irq = irq_of_parse_and_map(np, i);
 #endif
+		combiner_init_one(i, combiner_base + (i >> 2) * 0x10, irq);
 		combiner_cascade_irq(i, irq);
 	}
 }
-- 
1.7.9.5

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