The read on in_illuminance_input keeps at 0 after system sleep.
So add proper suspend and resume callback to make the sensor keep
working after system sleep.
Signed-off-by: Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx>
---
v2:
- Use dev_get_drvdata() instead of i2c_get_clientdata() to avoid extra
dereference.
drivers/iio/light/cm32181.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/drivers/iio/light/cm32181.c b/drivers/iio/light/cm32181.c
index 97649944f1df6..edbe6a3138d0b 100644
--- a/drivers/iio/light/cm32181.c
+++ b/drivers/iio/light/cm32181.c
@@ -460,6 +460,8 @@ static int cm32181_probe(struct i2c_client *client)
return PTR_ERR(client);
}
+ i2c_set_clientdata(client, indio_dev);
+
cm32181 = iio_priv(indio_dev);
cm32181->client = client;
cm32181->dev = dev;
@@ -486,6 +488,25 @@ static int cm32181_probe(struct i2c_client *client)
return 0;
}
+static int cm32181_suspend(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+
+ return i2c_smbus_write_word_data(client, CM32181_REG_ADDR_CMD,
+ CM32181_CMD_ALS_DISABLE);
+}
+
+static int cm32181_resume(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct cm32181_chip *cm32181 = iio_priv(dev_get_drvdata(dev));
+
+ return i2c_smbus_write_word_data(client, CM32181_REG_ADDR_CMD,
+ cm32181->conf_regs[CM32181_REG_ADDR_CMD]);
+}
+
+DEFINE_SIMPLE_DEV_PM_OPS(cm32181_pm_ops, cm32181_suspend, cm32181_resume);
+
static const struct of_device_id cm32181_of_match[] = {
{ .compatible = "capella,cm3218" },
{ .compatible = "capella,cm32181" },
@@ -506,6 +527,7 @@ static struct i2c_driver cm32181_driver = {
.name = "cm32181",
.acpi_match_table = ACPI_PTR(cm32181_acpi_match),
.of_match_table = cm32181_of_match,
+ .pm = pm_sleep_ptr(&cm32181_pm_ops),
},
.probe_new = cm32181_probe,
};
--
2.36.1
