linux-kernel - [PATCH V3 5/7] gpio: zynq: Disable the irq if it is not a wakeup source

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Date:   Mon, 17 Feb 2020 18:03:11 +0530
From:   Srinivas Neeli <srinivas.neeli@...inx.com>
To:     linus.walleij@...aro.org, bgolaszewski@...libre.com,
        michal.simek@...inx.com, shubhrajyoti.datta@...inx.com
Cc:     linux-gpio@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, git@...inx.com
Subject: [PATCH V3 5/7] gpio: zynq: Disable the irq if it is not a wakeup source

From: Shubhrajyoti Datta <shubhrajyoti.datta@...inx.com>

If gpio is not set to wake disable the interrupt. ATF set all slaves with
enabled interrupts as wakeup sources and if gpio is used in r5 then it
wakes up linux.

Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@...inx.com>
Signed-off-by: Michal Simek <michal.simek@...inx.com>
---
 drivers/gpio/gpio-zynq.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpio/gpio-zynq.c b/drivers/gpio/gpio-zynq.c
index 9ac69144a0eb..b6261a3aec55 100644
--- a/drivers/gpio/gpio-zynq.c
+++ b/drivers/gpio/gpio-zynq.c
@@ -735,6 +735,9 @@ static int __maybe_unused zynq_gpio_suspend(struct device *dev)
 	struct zynq_gpio *gpio = dev_get_drvdata(dev);
 	struct irq_data *data = irq_get_irq_data(gpio->irq);
 
+	if (!device_may_wakeup(dev))
+		disable_irq(gpio->irq);
+
 	if (!irqd_is_wakeup_set(data)) {
 		zynq_gpio_save_context(gpio);
 		return pm_runtime_force_suspend(dev);
@@ -749,6 +752,9 @@ static int __maybe_unused zynq_gpio_resume(struct device *dev)
 	struct irq_data *data = irq_get_irq_data(gpio->irq);
 	int ret;
 
+	if (!device_may_wakeup(dev))
+		enable_irq(gpio->irq);
+
 	if (!irqd_is_wakeup_set(data)) {
 		ret = pm_runtime_force_resume(dev);
 		zynq_gpio_restore_context(gpio);
@@ -956,6 +962,8 @@ static int zynq_gpio_probe(struct platform_device *pdev)
 		goto err_pm_put;
 	}
 
+	irq_set_status_flags(gpio->irq, IRQ_DISABLE_UNLAZY);
+	device_init_wakeup(&pdev->dev, 1);
 	pm_runtime_put(&pdev->dev);
 
 	return 0;
-- 
2.7.4