[PATCH 2/3] irqchip: sun4i: Simplify irq mapping

Hans de Goede
2014-03-13T19:50:01Z

Now that we're using handle_fasteio_irq for all interrupts, we can get rid
of having 2 irq_chip structs by making sun4i_irq_ack a nop for all irqs
except irq 0.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
drivers/irqchip/irq-sun4i.c | 27 ++++-----------------------
1 file changed, 4 insertions(+), 23 deletions(-)

diff --git a/drivers/irqchip/irq-sun4i.c b/drivers/irqchip/irq-sun4i.c
index 0a71990..6a8c88d 100644
--- a/drivers/irqchip/irq-sun4i.c
+++ b/drivers/irqchip/irq-sun4i.c
@@ -45,6 +45,9 @@ static void sun4i_irq_ack(struct irq_data *irqd)
int reg = irq / 32;
u32 val;

+ if (irq != 0)
+ return; /* Only IRQ 0 / the ENMI needs to be acked */
+
val = readl(sun4i_irq_base + SUN4I_IRQ_PENDING_REG(reg));
writel(val | (1 << irq_off),
sun4i_irq_base + SUN4I_IRQ_PENDING_REG(reg));
@@ -74,24 +77,8 @@ static void sun4i_irq_unmask(struct irq_data *irqd)
sun4i_irq_base + SUN4I_IRQ_ENABLE_REG(reg));
}

-/*
- * Since sun4i and sun5i are single core SOCs there is no need to mask non
- * oneshot IRQs, to achieve this we use handle_fasteoi_irq with a dummy eoi.
- */
-static void sun4i_irq_dummy_eoi(struct irq_data *irqd)
-{
-}
-
static struct irq_chip sun4i_irq_chip = {
.name = "sun4i_irq",
- .irq_eoi = sun4i_irq_dummy_eoi,
- .irq_mask = sun4i_irq_mask,
- .irq_unmask = sun4i_irq_unmask,
-};
-
-/* IRQ 0 / the ENMI needs a late eoi call */
-static struct irq_chip sun4i_irq_chip_enmi = {
- .name = "sun4i_irq",
.irq_eoi = sun4i_irq_ack,
.irq_mask = sun4i_irq_mask,
.irq_unmask = sun4i_irq_unmask,
@@ -101,13 +88,7 @@ static struct irq_chip sun4i_irq_chip_enmi = {
static int sun4i_irq_map(struct irq_domain *d, unsigned int virq,
irq_hw_number_t hw)
{
- if (hw == 0)
- irq_set_chip_and_handler(virq, &sun4i_irq_chip_enmi,
- handle_fasteoi_irq);
- else
- irq_set_chip_and_handler(virq, &sun4i_irq_chip,
- handle_fasteoi_irq);
-
+ irq_set_chip_and_handler(virq, &sun4i_irq_chip, handle_fasteoi_irq);
set_irq_flags(virq, IRQF_VALID | IRQF_PROBE);

return 0;
--
1.9.0