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