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Blackfin: bf537: fix excessive gpio int demuxing

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The search logic in the gpio demux walks all possible gpio blocks starting
at the specified pin.  The trouble on bf537 parts when we demux the port
F and port G mask A interrupts is that we also demux port H mask A ints.
Most of the time this isn't an issue as people don't usually use port H,
but might as well avoid it when possible.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Mike Frysinger 2011-04-15 12:51:33 -04:00
parent dd8cb37b4e
commit e2a8092c3f
1 changed files with 25 additions and 30 deletions
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55
arch/blackfin/mach-common/ints-priority.c
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@ -567,22 +567,41 @@ static int bfin_gpio_set_wake(struct irq_data *d, unsigned int state)
# define bfin_gpio_set_wake NULL
#endif
static void bfin_demux_gpio_block(unsigned int irq)
{
unsigned int gpio, mask;
gpio = irq_to_gpio(irq);
mask = get_gpiop_data(gpio) & get_gpiop_maska(gpio);
while (mask) {
if (mask & 1)
bfin_handle_irq(irq);
irq++;
mask >>= 1;
}
}
static void bfin_demux_gpio_irq(unsigned int inta_irq,
struct irq_desc *desc)
{
unsigned int i, gpio, mask, irq, search = 0;
unsigned int irq;
switch (inta_irq) {
#if defined(CONFIG_BF53x)
#if defined(BF537_FAMILY)
case IRQ_PROG_INTA:
irq = IRQ_PF0;
search = 1;
bfin_demux_gpio_block(IRQ_PF0);
irq = IRQ_PG0;
break;
# if defined(BF537_FAMILY) && !(defined(CONFIG_BFIN_MAC) || defined(CONFIG_BFIN_MAC_MODULE))
# if !(defined(CONFIG_BFIN_MAC) || defined(CONFIG_BFIN_MAC_MODULE))
case IRQ_MAC_RX:
irq = IRQ_PH0;
break;
# endif
#elif defined(BF533_FAMILY)
case IRQ_PROG_INTA:
irq = IRQ_PF0;
break;
#elif defined(BF538_FAMILY)
case IRQ_PORTF_INTA:
irq = IRQ_PF0;
@ -613,31 +632,7 @@ static void bfin_demux_gpio_irq(unsigned int inta_irq,
return;
}
if (search) {
for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
irq += i;
mask = get_gpiop_data(i) & get_gpiop_maska(i);
while (mask) {
if (mask & 1)
bfin_handle_irq(irq);
irq++;
mask >>= 1;
}
}
} else {
gpio = irq_to_gpio(irq);
mask = get_gpiop_data(gpio) & get_gpiop_maska(gpio);
do {
if (mask & 1)
bfin_handle_irq(irq);
irq++;
mask >>= 1;
} while (mask);
}
bfin_demux_gpio_block(irq);
}
#else /* CONFIG_BF54x */