Re: [alsa-devel] [PATCH 1/3] irq: If an IRQ is a GPIO, request and configure it

On Thu, Aug 04, 2011 at 05:00:18PM -0600, Stephen Warren wrote:

• } else {

• gpio = irq_to_gpio(irq);
  

• if (gpio_is_valid(gpio)) {
  

• 	ret = gpio_request(gpio, new->name);
  

• 	if (ret < 0)
  

• 		goto out_mask;
  

• 	ret = gpio_direction_input(gpio);
  

• 	if (ret < 0)
  

• 		goto out_mask;
  

• }
  

If you treat failures as an error what happens when a driver is using a GPIO as both an interrupt and a GPIO? For example a driver which monitors the level on a GPIO and uses edge triggered IRQs to be notified of state changes.