gpio/pca953x: Fix IRQ support.

It seems that in the normal case, IRQ_NOREQUEST needs to be explicitly
cleared, otherwise claiming the interrupt fails.
In the case of sparse interrupts, the descriptor needs to be allocated
first.

Signed-off-by: David Jander <david@protonic.nl>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This commit is contained in:
David Jander 2011-06-08 11:34:37 -06:00 committed by Grant Likely
parent 47732cb4fd
commit 910c8fb6b4

View File

@ -474,12 +474,16 @@ static int pca953x_irq_setup(struct pca953x_chip *chip,
* this purpose.
*/
chip->irq_stat &= chip->reg_direction;
chip->irq_base = pdata->irq_base;
mutex_init(&chip->irq_lock);
chip->irq_base = irq_alloc_descs(-1, pdata->irq_base, chip->gpio_chip.ngpio, -1);
if (chip->irq_base < 0)
goto out_failed;
for (lvl = 0; lvl < chip->gpio_chip.ngpio; lvl++) {
int irq = lvl + chip->irq_base;
irq_clear_status_flags(irq, IRQ_NOREQUEST);
irq_set_chip_data(irq, chip);
irq_set_chip_and_handler(irq, &pca953x_irq_chip,
handle_simple_irq);