linux-kernel - [PATCH 5.14 848/849] pinctrl: amd: Handle wake-up interrupt

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Date:   Mon, 15 Nov 2021 18:05:31 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Basavaraj Natikar <Basavaraj.Natikar@....com>,
        Mario Limonciello <mario.limonciello@....com>,
        Shyam Sundar S K <Shyam-sundar.S-k@....com>,
        Linus Walleij <linus.walleij@...aro.org>
Subject: [PATCH 5.14 848/849] pinctrl: amd: Handle wake-up interrupt

From: Basavaraj Natikar <Basavaraj.Natikar@....com>

commit acd47b9f28e55b505aedb842131b40904e151d7c upstream.

Enable/disable power management wakeup mode, which is disabled by
default. enable_irq_wake enables wakes the system from sleep.

Hence added enable/disable irq_wake to handle wake-up interrupt.

Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@....com>
Tested-by: Mario Limonciello <mario.limonciello@....com>
Acked-by: Shyam Sundar S K <Shyam-sundar.S-k@....com>
Link: https://lore.kernel.org/r/20210831120613.1514899-3-Basavaraj.Natikar@amd.com
Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/pinctrl/pinctrl-amd.c |   10 ++++++++++
 1 file changed, 10 insertions(+)

--- a/drivers/pinctrl/pinctrl-amd.c
+++ b/drivers/pinctrl/pinctrl-amd.c
@@ -445,6 +445,7 @@ static int amd_gpio_irq_set_wake(struct
 	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);
+	int err;
 
 	raw_spin_lock_irqsave(&gpio_dev->lock, flags);
 	pin_reg = readl(gpio_dev->base + (d->hwirq)*4);
@@ -457,6 +458,15 @@ static int amd_gpio_irq_set_wake(struct
 	writel(pin_reg, gpio_dev->base + (d->hwirq)*4);
 	raw_spin_unlock_irqrestore(&gpio_dev->lock, flags);
 
+	if (on)
+		err = enable_irq_wake(gpio_dev->irq);
+	else
+		err = disable_irq_wake(gpio_dev->irq);
+
+	if (err)
+		dev_err(&gpio_dev->pdev->dev, "failed to %s wake-up interrupt\n",
+			on ? "enable" : "disable");
+
 	return 0;
 }