From 4c7f85a321a1ac265159c22a6998ef4f2a60c21d Mon Sep 17 00:00:00 2001 From: Dmitry Osipenko Date: Sat, 19 Jun 2021 00:54:55 +0300 Subject: 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: Dmitry Osipenko Signed-off-by: Guenter Roeck --- drivers/hwmon/lm90.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) (limited to 'drivers/hwmon/lm90.c') 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, -- cgit v1.2.3