These Bosch accelerometers have two supplies, VDD and VDDIO.
Add some rudimentary support to obtain and enable these
regulators during probe() and disable them during remove()
or on the errorpath.
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
---
ChangeLog v1->v2:
- Use dev_err_probe() to simplify the errorpath.
---
drivers/iio/accel/bmc150-accel-core.c | 35 +++++++++++++++++++++++++--
1 file changed, 33 insertions(+), 2 deletions(-)
diff --git a/drivers/iio/accel/bmc150-accel-core.c b/drivers/iio/accel/bmc150-accel-core.c
index 0dafe4052856..a9714cfacf4d 100644
--- a/drivers/iio/accel/bmc150-accel-core.c
+++ b/drivers/iio/accel/bmc150-accel-core.c
@@ -28,6 +28,7 @@
#include <linux/iio/trigger_consumer.h>
#include <linux/iio/triggered_buffer.h>
#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
#include "bmc150-accel.h"
@@ -184,6 +185,7 @@ enum bmc150_accel_trigger_id {
struct bmc150_accel_data {
struct regmap *regmap;
+ struct regulator_bulk_data regulators[2];
int irq;
struct bmc150_accel_interrupt interrupts[BMC150_ACCEL_INTERRUPTS];
struct bmc150_accel_trigger triggers[BMC150_ACCEL_TRIGGERS];
@@ -1593,10 +1595,33 @@ int bmc150_accel_core_probe(struct device *dev, struct regmap *regmap, int irq,
&data->orientation);
if (ret)
return ret;
+ /*
+ * VDD is the analog and digital domain voltage supply
+ * VDDIO is the digital I/O voltage supply
+ */
+ data->regulators[0].supply = "vdd";
+ data->regulators[1].supply = "vddio";
+ ret = devm_regulator_bulk_get(dev,
+ ARRAY_SIZE(data->regulators),
+ data->regulators);
+ if (ret)
+ return dev_err_probe(dev, ret, "failed to get regulators\n");
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(data->regulators),
+ data->regulators);
+ if (ret) {
+ dev_err(dev, "failed to enable regulators: %d\n", ret);
+ return ret;
+ }
+ /*
+ * 2ms or 3ms power-on time according to datasheets, let's better
+ * be safe than sorry and set this delay to 5ms.
+ */
+ msleep(5);
ret = bmc150_accel_chip_init(data);
if (ret < 0)
- return ret;
+ goto err_disable_regulators;
mutex_init(&data->mutex);
@@ -1613,7 +1638,7 @@ int bmc150_accel_core_probe(struct device *dev, struct regmap *regmap, int irq,
&bmc150_accel_buffer_ops);
if (ret < 0) {
dev_err(dev, "Failed: iio triggered buffer setup\n");
- return ret;
+ goto err_disable_regulators;
}
if (data->irq > 0) {
@@ -1674,6 +1699,9 @@ int bmc150_accel_core_probe(struct device *dev, struct regmap *regmap, int irq,
bmc150_accel_unregister_triggers(data, BMC150_ACCEL_TRIGGERS - 1);
err_buffer_cleanup:
iio_triggered_buffer_cleanup(indio_dev);
+err_disable_regulators:
+ regulator_bulk_disable(ARRAY_SIZE(data->regulators),
+ data->regulators);
return ret;
}
@@ -1698,6 +1726,9 @@ int bmc150_accel_core_remove(struct device *dev)
bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_DEEP_SUSPEND, 0);
mutex_unlock(&data->mutex);
+ regulator_bulk_disable(ARRAY_SIZE(data->regulators),
+ data->regulators);
+
return 0;
}
EXPORT_SYMBOL_GPL(bmc150_accel_core_remove);
--
2.26.2
