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ARM: OMAP1: ams-delta: fix deferred_fiq handler 

The deferred_fiq handler used to limit hardware operations to IRQ
unmask only, relying on gpio-omap assigned handler performing the ACKs.
Since commit 80ac93c274 ("gpio: omap: Fix lost edge interrupts") this
is no longer the case as handle_edge_irq() has been replaced with
handle_simmple_irq() which doesn't touch the hardware.

Add single ACK operation per each active IRQ pin to the handler. While
being at it, move unmask operation out of irq_counter loop so it is
also called only once for each active IRQ pin.

Fixes: 80ac93c274 ("gpio: omap: Fix lost edge interrupts")
Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Janusz Krzysztofik 2018-05-02 20:32:03 +02:00 committed by Tony Lindgren
parent 30443b3104
commit baf64250b4
1 changed files with 14 additions and 12 deletions
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26
arch/arm/mach-omap1/ams-delta-fiq.c
View File

@ -58,22 +58,24 @@ static irqreturn_t deferred_fiq(int irq, void *dev_id)
irq_num = gpio_to_irq(gpio);
fiq_count = fiq_buffer[FIQ_CNT_INT_00 + gpio];
while (irq_counter[gpio] < fiq_count) {
if (gpio != AMS_DELTA_GPIO_PIN_KEYBRD_CLK) {
struct irq_data *d = irq_get_irq_data(irq_num);
if (irq_counter[gpio] < fiq_count &&
gpio != AMS_DELTA_GPIO_PIN_KEYBRD_CLK) {
struct irq_data *d = irq_get_irq_data(irq_num);
/*
* It looks like handle_edge_irq() that
* OMAP GPIO edge interrupts default to,
* expects interrupt already unmasked.
*/
if (irq_chip && irq_chip->irq_unmask)
/*
* handle_simple_irq() that OMAP GPIO edge
* interrupts default to since commit 80ac93c27441
* requires interrupt already acked and unmasked.
*/
if (irq_chip) {
if (irq_chip->irq_ack)
irq_chip->irq_ack(d);
if (irq_chip->irq_unmask)
irq_chip->irq_unmask(d);
}
generic_handle_irq(irq_num);
irq_counter[gpio]++;
}
for (; irq_counter[gpio] < fiq_count; irq_counter[gpio]++)
generic_handle_irq(irq_num);
}
return IRQ_HANDLED;
}