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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: Hoan Tran <hotran@apm.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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a621c99a96
commit
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1 changed files with 22 additions and 1 deletions
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@ -77,6 +77,7 @@ struct dwapb_context {
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u32 int_type;
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u32 int_pol;
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u32 int_deb;
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u32 wake_en;
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};
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#endif
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@ -295,6 +296,22 @@ static int dwapb_irq_set_type(struct irq_data *d, u32 type)
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return 0;
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}
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#ifdef CONFIG_PM_SLEEP
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static int dwapb_irq_set_wake(struct irq_data *d, unsigned int enable)
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{
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struct irq_chip_generic *igc = irq_data_get_irq_chip_data(d);
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struct dwapb_gpio *gpio = igc->private;
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struct dwapb_context *ctx = gpio->ports[0].ctx;
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if (enable)
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ctx->wake_en |= BIT(d->hwirq);
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else
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ctx->wake_en &= ~BIT(d->hwirq);
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return 0;
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}
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#endif
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static int dwapb_gpio_set_debounce(struct gpio_chip *gc,
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unsigned offset, unsigned debounce)
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{
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@ -385,6 +402,9 @@ static void dwapb_configure_irqs(struct dwapb_gpio *gpio,
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ct->chip.irq_disable = dwapb_irq_disable;
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ct->chip.irq_request_resources = dwapb_irq_reqres;
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ct->chip.irq_release_resources = dwapb_irq_relres;
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#ifdef CONFIG_PM_SLEEP
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ct->chip.irq_set_wake = dwapb_irq_set_wake;
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#endif
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ct->regs.ack = gpio_reg_convert(gpio, GPIO_PORTA_EOI);
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ct->regs.mask = gpio_reg_convert(gpio, GPIO_INTMASK);
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ct->type = IRQ_TYPE_LEVEL_MASK;
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@ -699,7 +719,8 @@ static int dwapb_gpio_suspend(struct device *dev)
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ctx->int_deb = dwapb_read(gpio, GPIO_PORTA_DEBOUNCE);
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/* Mask out interrupts */
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dwapb_write(gpio, GPIO_INTMASK, 0xffffffff);
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dwapb_write(gpio, GPIO_INTMASK,
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0xffffffff & ~ctx->wake_en);
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}
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}
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spin_unlock_irqrestore(&gc->bgpio_lock, flags);
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