-/*
- * PXA GPIO edge detection for IRQs:
- * IRQs are generated on Falling-Edge, Rising-Edge, or both.
- * Use this instead of directly setting GRER/GFER.
- */
-
-static long GPIO_IRQ_rising_edge[4];
-static long GPIO_IRQ_falling_edge[4];
-static long GPIO_IRQ_mask[4];
-
-static int pxa_gpio_irq_type(unsigned int irq, unsigned int type)
-{
- int gpio, idx;
-
- gpio = IRQ_TO_GPIO(irq);
- idx = gpio >> 5;
-
- if (type == IRQT_PROBE) {
- /* Don't mess with enabled GPIOs using preconfigured edges or
- GPIOs set to alternate function or to output during probe */
- if ((GPIO_IRQ_rising_edge[idx] | GPIO_IRQ_falling_edge[idx] | GPDR(gpio)) &
- GPIO_bit(gpio))
- return 0;
- if (GAFR(gpio) & (0x3 << (((gpio) & 0xf)*2)))
- return 0;
- type = __IRQT_RISEDGE | __IRQT_FALEDGE;
- }
-
- /* printk(KERN_DEBUG "IRQ%d (GPIO%d): ", irq, gpio); */
-
- pxa_gpio_mode(gpio | GPIO_IN);
-
- if (type & __IRQT_RISEDGE) {
- /* printk("rising "); */
- __set_bit (gpio, GPIO_IRQ_rising_edge);
- } else {
- __clear_bit (gpio, GPIO_IRQ_rising_edge);
- }
-
- if (type & __IRQT_FALEDGE) {
- /* printk("falling "); */
- __set_bit (gpio, GPIO_IRQ_falling_edge);
- } else {
- __clear_bit (gpio, GPIO_IRQ_falling_edge);
- }
-
- /* printk("edges\n"); */
-
- GRER(gpio) = GPIO_IRQ_rising_edge[idx] & GPIO_IRQ_mask[idx];
- GFER(gpio) = GPIO_IRQ_falling_edge[idx] & GPIO_IRQ_mask[idx];