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irqchip: crossbar: Introduce centralized check for crossbar write

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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>
This commit is contained in:
Nishanth Menon 2014-06-26 12:40:32 +05:30 committed by Jason Cooper
parent 2f7d2fb71d
commit 29918b6790
1 changed files with 12 additions and 2 deletions
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14
drivers/irqchip/irq-crossbar.c
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@ -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);
}