Re: [PATCH 1/3] irq: If an IRQ is a GPIO, request and configure it
From: Mark Brown <hidden>
Date: 2011-08-05 00:02:00
Also in:
alsa-devel, linux-arm-kernel, linux-tegra, lkml
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.