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authorNishanth Menon <nm@ti.com>2014-06-26 11:10:32 +0400
committerJason Cooper <jason@lakedaemon.net>2014-06-30 23:21:01 +0400
commit29918b6790d92456cab87ff41a01224e0882d04a (patch)
treea710a197bb20c387752389dd336e3f4908212003 /drivers/irqchip
parent2f7d2fb71dd0c14f9c0fe66f2ed7b4685fa745e2 (diff)
downloadlinux-29918b6790d92456cab87ff41a01224e0882d04a.tar.xz
irqchip: crossbar: Introduce centralized check for crossbar write
This is a basic check to ensure that crossbar register needs to be written. This ensures that we have a common check which is used in both map and unmap logic. Signed-off-by: Nishanth Menon <nm@ti.com> Signed-off-by: Sricharan R <r.sricharan@ti.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Link: https://lkml.kernel.org/r/1403766634-18543-15-git-send-email-r.sricharan@ti.com Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Diffstat (limited to 'drivers/irqchip')
-rw-r--r--drivers/irqchip/irq-crossbar.c14
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/irqchip/irq-crossbar.c b/drivers/irqchip/irq-crossbar.c
index c9f068ca7bc9..83f803bfab76 100644
--- a/drivers/irqchip/irq-crossbar.c
+++ b/drivers/irqchip/irq-crossbar.c
@@ -84,10 +84,20 @@ static inline int allocate_free_irq(int cb_no)
return -ENODEV;
}
+static inline bool needs_crossbar_write(irq_hw_number_t hw)
+{
+ if (hw > GIC_IRQ_START)
+ return true;
+
+ return false;
+}
+
static int crossbar_domain_map(struct irq_domain *d, unsigned int irq,
irq_hw_number_t hw)
{
- cb->write(hw - GIC_IRQ_START, cb->irq_map[hw - GIC_IRQ_START]);
+ if (needs_crossbar_write(hw))
+ cb->write(hw - GIC_IRQ_START, cb->irq_map[hw - GIC_IRQ_START]);
+
return 0;
}
@@ -106,7 +116,7 @@ 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 (needs_crossbar_write(hw)) {
cb->irq_map[hw - GIC_IRQ_START] = IRQ_FREE;
cb->write(hw - GIC_IRQ_START, cb->safe_map);
}