iio: chemical: ens160: add power management support

ENS160 supports a deep sleep mode for minimal power consumption.
Use it to add PM sleep capability to the driver.

Signed-off-by: Gustavo Silva <gustavograzs@gmail.com>
Link: https://lore.kernel.org/r/20240604225747.7212-6-gustavograzs@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/chemical/ens160.h b/drivers/iio/chemical/ens160.h
index e6cc0987aed0f9b2e3a8e5171749a4ae1f1c7e2f..f9f0575ce55d606fdf99979ca3e3d70a54dfb379 100644 (file)
--- a/drivers/iio/chemical/ens160.h
+++ b/drivers/iio/chemical/ens160.h
@@ -4,4 +4,7 @@
 
 int devm_ens160_core_probe(struct device *dev, struct regmap *regmap, int irq,
                           const char *name);
+
+extern const struct dev_pm_ops ens160_pm_ops;
+
 #endif

diff --git a/drivers/iio/chemical/ens160_core.c b/drivers/iio/chemical/ens160_core.c
index 3da3b10950dd9189e27dbe297661e460093c731b..c1aa3b498d3b88ed5e8c82076670fd2d2c2bda0b 100644 (file)
--- a/drivers/iio/chemical/ens160_core.c
+++ b/drivers/iio/chemical/ens160_core.c
@@ -220,6 +220,29 @@ static const struct iio_info ens160_info = {
        .read_raw = ens160_read_raw,
 };
 
+static int ens160_suspend(struct device *dev)
+{
+       struct iio_dev *indio_dev = dev_get_drvdata(dev);
+       struct ens160_data *data = iio_priv(indio_dev);
+
+       return ens160_set_mode(data, ENS160_REG_MODE_DEEP_SLEEP);
+}
+
+static int ens160_resume(struct device *dev)
+{
+       struct iio_dev *indio_dev = dev_get_drvdata(dev);
+       struct ens160_data *data = iio_priv(indio_dev);
+       int ret;
+
+       ret = ens160_set_mode(data, ENS160_REG_MODE_IDLE);
+       if (ret)
+               return ret;
+
+       return ens160_set_mode(data, ENS160_REG_MODE_STANDARD);
+}
+EXPORT_NS_SIMPLE_DEV_PM_OPS(ens160_pm_ops, ens160_suspend, ens160_resume,
+                           IIO_ENS160);
+
 static irqreturn_t ens160_trigger_handler(int irq, void *p)
 {
        struct iio_poll_func *pf = p;

diff --git a/drivers/iio/chemical/ens160_i2c.c b/drivers/iio/chemical/ens160_i2c.c
index f3fb45b75f295df9f70ce43a12030c2f6647fbac..57a189a4c257c4cd57b9f3356ae71dc0e976bcf0 100644 (file)
--- a/drivers/iio/chemical/ens160_i2c.c
+++ b/drivers/iio/chemical/ens160_i2c.c
@@ -49,6 +49,7 @@ static struct i2c_driver ens160_i2c_driver = {
        .driver = {
                .name           = "ens160",
                .of_match_table = ens160_of_i2c_match,
+               .pm             = pm_sleep_ptr(&ens160_pm_ops),
        },
        .probe = ens160_i2c_probe,
        .id_table = ens160_i2c_id,

diff --git a/drivers/iio/chemical/ens160_spi.c b/drivers/iio/chemical/ens160_spi.c
index 90e1e8386bdb68b2bfae9bf320aca1ee9e9a7072..10e4f5fd0f45cb2c86fddba8fc05424678bca001 100644 (file)
--- a/drivers/iio/chemical/ens160_spi.c
+++ b/drivers/iio/chemical/ens160_spi.c
@@ -48,6 +48,7 @@ static struct spi_driver ens160_spi_driver = {
        .driver = {
                .name   = "ens160",
                .of_match_table = ens160_spi_of_match,
+               .pm = pm_sleep_ptr(&ens160_pm_ops),
        },
        .probe          = ens160_spi_probe,
        .id_table       = ens160_spi_id,