linux-kernel - [PATCH] Input: tsc2004/5 - do not use irq_set_irq

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Message-ID: <20170212234333.GA25725@dtor-ws>
Date:   Sun, 12 Feb 2017 15:43:33 -0800
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     linux-input@...r.kernel.org
Cc:     Pavel Machek <pavel@....cz>, Sebastian Reichel <sre@...nel.org>,
        Pali Rohár <pali.rohar@...il.com>,
        Michael Welling <mwelling@...e.org>,
        linux-kernel@...r.kernel.org
Subject: [PATCH] Input: tsc2004/5 - do not use irq_set_irq_wake() directly

Instead of setting irq_set_irq_wake() directly in probe(), mark the device
as wakeup-capable, and use enable_irq_wake() and disable_irq_wake() in
suspend/resume path.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
---
 drivers/input/touchscreen/tsc200x-core.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/input/touchscreen/tsc200x-core.c b/drivers/input/touchscreen/tsc200x-core.c
index 88ea5e1b72ae..d1c40c803d61 100644
--- a/drivers/input/touchscreen/tsc200x-core.c
+++ b/drivers/input/touchscreen/tsc200x-core.c
@@ -114,7 +114,9 @@ struct tsc200x {
 
 	struct gpio_desc	*reset_gpio;
 	int			(*tsc200x_cmd)(struct device *dev, u8 cmd);
+
 	int			irq;
+	bool			wake_irq_enabled;
 };
 
 static void tsc200x_update_pen_state(struct tsc200x *ts,
@@ -573,7 +575,8 @@ int tsc200x_probe(struct device *dev, int irq, const struct input_id *tsc_id,
 		goto err_remove_sysfs;
 	}
 
-	irq_set_irq_wake(irq, 1);
+	device_init_wakeup(dev, true);
+
 	return 0;
 
 err_remove_sysfs:
@@ -607,6 +610,9 @@ static int __maybe_unused tsc200x_suspend(struct device *dev)
 
 	ts->suspended = true;
 
+	if (device_may_wakeup(dev))
+		ts->wake_irq_enabled = enable_irq_wake(ts->irq) == 0;
+
 	mutex_unlock(&ts->mutex);
 
 	return 0;
@@ -618,6 +624,11 @@ static int __maybe_unused tsc200x_resume(struct device *dev)
 
 	mutex_lock(&ts->mutex);
 
+	if (ts->wake_irq_enabled) {
+		disable_irq_wake(ts->irq);
+		ts->wake_irq_enabled = false;
+	}
+
 	if (ts->suspended && ts->opened)
 		__tsc200x_enable(ts);
 
-- 
2.11.0.483.g087da7b7c-goog


-- 
Dmitry