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path: root/drivers/irqchip/irq-crossbar.c
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Diffstat (limited to 'drivers/irqchip/irq-crossbar.c')
-rw-r--r--drivers/irqchip/irq-crossbar.c19
1 files changed, 17 insertions, 2 deletions
diff --git a/drivers/irqchip/irq-crossbar.c b/drivers/irqchip/irq-crossbar.c
index 0533a71fa86f..4be30c00f041 100644
--- a/drivers/irqchip/irq-crossbar.c
+++ b/drivers/irqchip/irq-crossbar.c
@@ -23,16 +23,18 @@
/*
* @int_max: maximum number of supported interrupts
+ * @safe_map: safe default value to initialize the crossbar
* @irq_map: array of interrupts to crossbar number mapping
* @crossbar_base: crossbar base address
* @register_offsets: offsets for each irq number
*/
struct crossbar_device {
uint int_max;
+ uint safe_map;
uint *irq_map;
void __iomem *crossbar_base;
int *register_offsets;
- void (*write) (int, int);
+ void (*write)(int, int);
};
static struct crossbar_device *cb;
@@ -88,8 +90,10 @@ static void crossbar_domain_unmap(struct irq_domain *d, unsigned int irq)
{
irq_hw_number_t hw = irq_get_irq_data(irq)->hwirq;
- if (hw > GIC_IRQ_START)
+ if (hw > GIC_IRQ_START) {
cb->irq_map[hw - GIC_IRQ_START] = IRQ_FREE;
+ cb->write(hw - GIC_IRQ_START, cb->safe_map);
+ }
}
static int crossbar_domain_xlate(struct irq_domain *d,
@@ -214,6 +218,17 @@ static int __init crossbar_of_init(struct device_node *node)
reserved += size;
}
+ of_property_read_u32(node, "ti,irqs-safe-map", &cb->safe_map);
+
+ /* Initialize the crossbar with safe map to start with */
+ for (i = 0; i < max; i++) {
+ if (cb->irq_map[i] == IRQ_RESERVED ||
+ cb->irq_map[i] == IRQ_SKIP)
+ continue;
+
+ cb->write(i, cb->safe_map);
+ }
+
register_routable_domain_ops(&routable_irq_domain_ops);
return 0;