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Commit 6437c7ba authored by Hoan Tran's avatar Hoan Tran Committed by Linus Walleij
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gpio: dwapb: Add wakeup source support 



This patch supports irq_set_wake for dwapb gpio. It allows GPIOs
to be configured as wakeup sources and wake the system from suspend.

Signed-off-by: default avatarHoan Tran <hotran@apm.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent a621c99a

drivers/gpio/gpio-dwapb.c

+22 −1
Original line number Diff line number Diff line
@@ -77,6 +77,7 @@ struct dwapb_context { 
	u32 int_type;

	u32 int_pol;

	u32 int_deb;

	u32 wake_en;

};

#endif
@@ -295,6 +296,22 @@ static int dwapb_irq_set_type(struct irq_data *d, u32 type) 
	return 0;

}



#ifdef CONFIG_PM_SLEEP

static int dwapb_irq_set_wake(struct irq_data *d, unsigned int enable)

{

	struct irq_chip_generic *igc = irq_data_get_irq_chip_data(d);

	struct dwapb_gpio *gpio = igc->private;

	struct dwapb_context *ctx = gpio->ports[0].ctx;



	if (enable)

		ctx->wake_en |= BIT(d->hwirq);

	else

		ctx->wake_en &= ~BIT(d->hwirq);



	return 0;

}

#endif



static int dwapb_gpio_set_debounce(struct gpio_chip *gc,

				   unsigned offset, unsigned debounce)

{
@@ -385,6 +402,9 @@ static void dwapb_configure_irqs(struct dwapb_gpio *gpio, 
		ct->chip.irq_disable = dwapb_irq_disable;

		ct->chip.irq_request_resources = dwapb_irq_reqres;

		ct->chip.irq_release_resources = dwapb_irq_relres;

#ifdef CONFIG_PM_SLEEP

		ct->chip.irq_set_wake = dwapb_irq_set_wake;

#endif

		ct->regs.ack = gpio_reg_convert(gpio, GPIO_PORTA_EOI);

		ct->regs.mask = gpio_reg_convert(gpio, GPIO_INTMASK);

		ct->type = IRQ_TYPE_LEVEL_MASK;
@@ -699,7 +719,8 @@ static int dwapb_gpio_suspend(struct device *dev) 
			ctx->int_deb	= dwapb_read(gpio, GPIO_PORTA_DEBOUNCE);



			/* Mask out interrupts */

			dwapb_write(gpio, GPIO_INTMASK, 0xffffffff);

			dwapb_write(gpio, GPIO_INTMASK,

				    0xffffffff & ~ctx->wake_en);

		}

	}

	spin_unlock_irqrestore(&gc->bgpio_lock, flags);