static xcpt_t up_irqbuttonx(int irq, xcpt_t irqhandler, xcpt_t *store)
{
xcpt_t oldhandler;
irqstate_t flags;
/* Disable interrupts until we are done. This guarantees that the following
* operations are atomic.
*/
flags = irqsave();
/* Get the old button interrupt handler and save the new one */
oldhandler = *store;
*store = irqhandler;
/* Configure the interrupt */
sam3u_gpioirq(irq);
(void)irq_attach(irq, irqhandler);
sam3u_gpioirqenable(irq);
irqrestore(flags);
/* Return the old button handler (so that it can be restored) */
return oldhandler;
}
static void tsc_enable(FAR struct ads7843e_config_s *state, bool enable)
{
/* Attach and enable, or detach and disable */
ivdbg("IRQ:%d enable:%d\n", SAM3U_TCS_IRQ, enable);
if (enable)
{
sam3u_gpioirqenable(SAM3U_TCS_IRQ);
}
else
{
sam3u_gpioirqdisable(SAM3U_TCS_IRQ);
}
}
void up_enable_irq(int irq)
{
uint32_t regaddr;
uint32_t regval;
uint32_t bit;
if (sam3u_irqinfo(irq, ®addr, &bit) == 0)
{
/* Set the appropriate bit in the register to enable the interrupt */
regval = getreg32(regaddr);
regval |= bit;
putreg32(regval, regaddr);
}
#ifdef CONFIG_GPIO_IRQ
else
{
/* Maybe it is a (derived) GPIO IRQ */
sam3u_gpioirqenable(irq);
}
#endif
sam3u_dumpnvic("enable", irq);
}
