Currently, the GPIO interrupt handling is duplicating some of the work
done by the generic IRQ handlers (handle_edge_irq, handle_level_irq)
such as detecting nesting, handling re-triggers etc. Remove this
duplication and use generic hooks based on IRQ type.
Using generic IRQ handlers ensures correct behavior when using
threaded interrupts introduced by the -rt patch.
Signed-off-by: Kevin Hilman <khilman@xxxxxxxxxx>
---
arch/arm/plat-omap/gpio.c | 42 +++++++-----------------------------------
1 files changed, 7 insertions(+), 35 deletions(-)
diff --git a/arch/arm/plat-omap/gpio.c b/arch/arm/plat-omap/gpio.c
index a0015dd..c71ec43 100644
--- a/arch/arm/plat-omap/gpio.c
+++ b/arch/arm/plat-omap/gpio.c
@@ -540,10 +540,6 @@ static inline void set_24xx_gpio_triggering(struct gpio_bank *bank, int gpio,
bank->level_mask =
__raw_readl(bank->base + OMAP24XX_GPIO_LEVELDETECT0) |
__raw_readl(bank->base + OMAP24XX_GPIO_LEVELDETECT1);
- /*
- * FIXME: Possibly do 'set_irq_handler(j, handle_level_irq)' if only
- * level triggering requested.
- */
}
#endif
@@ -653,6 +649,12 @@ static int gpio_irq_type(unsigned irq, unsigned type)
irq_desc[irq].status |= type;
}
spin_unlock(&bank->lock);
+
+ if (type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH))
+ __set_irq_handler_unlocked(irq, handle_level_irq);
+ else if (type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING))
+ __set_irq_handler_unlocked(irq, handle_edge_irq);
+
return retval;
}
@@ -1044,42 +1046,12 @@ static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
gpio_irq = bank->virtual_irq_start;
for (; isr != 0; isr >>= 1, gpio_irq++) {
struct irq_desc *d;
- int irq_mask;
+
if (!(isr & 1))
continue;
d = irq_desc + gpio_irq;
- /* Don't run the handler if it's already running
- * or was disabled lazely.
- */
- if (unlikely((d->depth ||
- (d->status & IRQ_INPROGRESS)))) {
- irq_mask = 1 <<
- (gpio_irq - bank->virtual_irq_start);
- /* The unmasking will be done by
- * enable_irq in case it is disabled or
- * after returning from the handler if
- * it's already running.
- */
- _enable_gpio_irqbank(bank, irq_mask, 0);
- if (!d->depth) {
- /* Level triggered interrupts
- * won't ever be reentered
- */
- BUG_ON(level_mask & irq_mask);
- d->status |= IRQ_PENDING;
- }
- continue;
- }
desc_handle_irq(gpio_irq, d);
-
- if (unlikely((d->status & IRQ_PENDING) && !d->depth)) {
- irq_mask = 1 <<
- (gpio_irq - bank->virtual_irq_start);
- d->status &= ~IRQ_PENDING;
- _enable_gpio_irqbank(bank, irq_mask, 1);
- retrigger |= irq_mask;
- }
}
}
/* if bank has any level sensitive GPIO pin interrupt
--
1.5.3.7
-
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