Commit 4c7f85a3 authored by Dmitry Osipenko's avatar Dmitry Osipenko Committed by Guenter Roeck
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hwmon: (lm90) Disable interrupt on suspend 



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: default avatarDmitry Osipenko <digetx@gmail.com>
Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent 2abdc357

drivers/hwmon/lm90.c

+25 −0
Original line number Diff line number Diff line
@@ -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,