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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 2011-06-14 11:00:54 +02:00 committed by Grant Likely
parent 8e46ea3ec8
commit c609c05db1
1 changed files with 3 additions and 1 deletions
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4
drivers/gpio/gpio-pca953x.c
View File

@ -517,8 +517,10 @@ out_failed:
static void pca953x_irq_teardown(struct pca953x_chip *chip)
{
if (chip->irq_base != -1)
if (chip->irq_base != -1) {
irq_free_descs(chip->irq_base, chip->gpio_chip.ngpio);
free_irq(chip->client->irq, chip);
}
}
#else /* CONFIG_GPIO_PCA953X_IRQ */
static int pca953x_irq_setup(struct pca953x_chip *chip,