diff mbox series

[v3,4/4] hwmon: (lm90) Disable interrupt on suspend

Message ID 20210618215455.19986-5-digetx@gmail.com (mailing list archive)
State Accepted
Headers show
Series HWMON LM90 interrupt fixes and improvements | expand

Commit Message

Dmitry Osipenko June 18, 2021, 9:54 p.m. UTC 
I2C accesses are prohibited and will error out after suspending of the
I2C controller, hence we need to ensure that interrupt won't fire on
suspend when it's too late. Disable interrupt across suspend/resume.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
 drivers/hwmon/lm90.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
diff mbox series

Patch

diff --git a/drivers/hwmon/lm90.c b/drivers/hwmon/lm90.c
index 658b486d2f5e..b53f17511b05 100644
--- a/drivers/hwmon/lm90.c
+++ b/drivers/hwmon/lm90.c
@@ -1973,11 +1973,36 @@  static void lm90_alert(struct i2c_client *client, enum i2c_alert_protocol type,
 	}
 }
 
+static int __maybe_unused lm90_suspend(struct device *dev)
+{
+	struct lm90_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
+
+	if (client->irq)
+		disable_irq(client->irq);
+
+	return 0;
+}
+
+static int __maybe_unused lm90_resume(struct device *dev)
+{
+	struct lm90_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
+
+	if (client->irq)
+		enable_irq(client->irq);
+
+	return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(lm90_pm_ops, lm90_suspend, lm90_resume);
+
 static struct i2c_driver lm90_driver = {
 	.class		= I2C_CLASS_HWMON,
 	.driver = {
 		.name	= "lm90",
 		.of_match_table = of_match_ptr(lm90_of_match),
+		.pm	= &lm90_pm_ops,
 	},
 	.probe_new	= lm90_probe,
 	.alert		= lm90_alert,