Commit d62bd5ce authored by Raul E Rangel's avatar Raul E Rangel Committed by Linus Walleij
Browse files

pinctrl: amd: Implement irq_set_wake 



This allows the OS to control which devices produce wake events.

$ grep enabled /sys/kernel/irq/*/wakeup
/sys/kernel/irq/24/wakeup:enabled

Signed-off-by: default avatarRaul E Rangel <rrangel@chromium.org>
Link: https://lore.kernel.org/r/20210429163341.1.I7631534622233689dd81410525e0dd617b9b2012@changeid


Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent ac5f8197

drivers/pinctrl/pinctrl-amd.c

+31 −1
Original line number Diff line number Diff line
@@ -438,6 +438,29 @@ static void amd_gpio_irq_unmask(struct irq_data *d) 
	raw_spin_unlock_irqrestore(&gpio_dev->lock, flags);

}



static int amd_gpio_irq_set_wake(struct irq_data *d, unsigned int on)

{

	u32 pin_reg;

	unsigned long flags;

	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);

	struct amd_gpio *gpio_dev = gpiochip_get_data(gc);

	u32 wake_mask = BIT(WAKE_CNTRL_OFF_S0I3) | BIT(WAKE_CNTRL_OFF_S3) |

			BIT(WAKE_CNTRL_OFF_S4);



	raw_spin_lock_irqsave(&gpio_dev->lock, flags);

	pin_reg = readl(gpio_dev->base + (d->hwirq)*4);



	if (on)

		pin_reg |= wake_mask;

	else

		pin_reg &= ~wake_mask;



	writel(pin_reg, gpio_dev->base + (d->hwirq)*4);

	raw_spin_unlock_irqrestore(&gpio_dev->lock, flags);



	return 0;

}



static void amd_gpio_irq_eoi(struct irq_data *d)

{

	u32 reg;
@@ -552,9 +575,16 @@ static struct irq_chip amd_gpio_irqchip = { 
	.irq_disable  = amd_gpio_irq_disable,

	.irq_mask     = amd_gpio_irq_mask,

	.irq_unmask   = amd_gpio_irq_unmask,

	.irq_set_wake = amd_gpio_irq_set_wake,

	.irq_eoi      = amd_gpio_irq_eoi,

	.irq_set_type = amd_gpio_irq_set_type,

	.flags        = IRQCHIP_SKIP_SET_WAKE,

	/*

	 * We need to set IRQCHIP_ENABLE_WAKEUP_ON_SUSPEND so that a wake event

	 * also generates an IRQ. We need the IRQ so the irq_handler can clear

	 * the wake event. Otherwise the wake event will never clear and

	 * prevent the system from suspending.

	 */

	.flags        = IRQCHIP_ENABLE_WAKEUP_ON_SUSPEND,

};



#define PIN_IRQ_PENDING	(BIT(INTERRUPT_STS_OFF) | BIT(WAKE_STS_OFF))