gpio/langwell_gpio: ack the correct bit for langwell gpio interrupts
The wrong bit was masked when acking langwell gpio interrupts.
Reason for maskig the wrong bit was probably because__ffs() and ffs() functions
return bit indexes differently (0..31 vs 1..32)
This fixes langwell based devices from hanging when a gpio interrupt is
triggered and undoes the breakage which occurred in change set
732063b92b
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This commit is contained in:
parent
58956ba23e
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2345b20fd9
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@ -223,7 +223,7 @@ static void lnw_irq_handler(unsigned irq, struct irq_desc *desc)
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gedr = gpio_reg(&lnw->chip, base, GEDR);
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gedr = gpio_reg(&lnw->chip, base, GEDR);
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pending = readl(gedr);
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pending = readl(gedr);
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while (pending) {
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while (pending) {
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gpio = __ffs(pending) - 1;
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gpio = __ffs(pending);
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mask = BIT(gpio);
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mask = BIT(gpio);
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pending &= ~mask;
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pending &= ~mask;
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/* Clear before handling so we can't lose an edge */
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/* Clear before handling so we can't lose an edge */
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