[PATCH v7 25/38] iio/scmi: port driver to the new scmi_sensor_proto_ops interface

Cristian Marussi
2021-03-16T17:07:57Z

Port driver to the new SCMI Sensor interface based on protocol handles
and common devm_get_ops().

Cc: Jyoti Bhayana <jbhayana@google.com>
Cc: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
---
drivers/iio/common/scmi_sensors/scmi_iio.c | 91 ++++++++++------------
1 file changed, 41 insertions(+), 50 deletions(-)

diff --git a/drivers/iio/common/scmi_sensors/scmi_iio.c b/drivers/iio/common/scmi_sensors/scmi_iio.c
index 872d87ca6256..b4bdc3f3a946 100644
--- a/drivers/iio/common/scmi_sensors/scmi_iio.c
+++ b/drivers/iio/common/scmi_sensors/scmi_iio.c
@@ -21,8 +21,10 @@

#define SCMI_IIO_NUM_OF_AXIS 3

+static const struct scmi_sensor_proto_ops *sensor_ops;
+
struct scmi_iio_priv {
- struct scmi_handle *handle;
+ struct scmi_protocol_handle *ph;
const struct scmi_sensor_info *sensor_info;
struct iio_dev *indio_dev;
/* adding one additional channel for timestamp */
@@ -82,7 +84,6 @@ static int scmi_iio_sensor_update_cb(struct notifier_block *nb,
static int scmi_iio_buffer_preenable(struct iio_dev *iio_dev)
{
struct scmi_iio_priv *sensor = iio_priv(iio_dev);
- u32 sensor_id = sensor->sensor_info->id;
u32 sensor_config = 0;
int err;

@@ -92,27 +93,11 @@ static int scmi_iio_buffer_preenable(struct iio_dev *iio_dev)

sensor_config |= FIELD_PREP(SCMI_SENS_CFG_SENSOR_ENABLED_MASK,
SCMI_SENS_CFG_SENSOR_ENABLE);
-
- err = sensor->handle->notify_ops->register_event_notifier(sensor->handle,
- SCMI_PROTOCOL_SENSOR, SCMI_EVENT_SENSOR_UPDATE,
- &sensor_id, &sensor->sensor_update_nb);
- if (err) {
- dev_err(&iio_dev->dev,
- "Error in registering sensor update notifier for sensor %s err %d",
- sensor->sensor_info->name, err);
- return err;
- }
-
- err = sensor->handle->sensor_ops->config_set(sensor->handle,
- sensor->sensor_info->id, sensor_config);
- if (err) {
- sensor->handle->notify_ops->unregister_event_notifier(sensor->handle,
- SCMI_PROTOCOL_SENSOR,
- SCMI_EVENT_SENSOR_UPDATE, &sensor_id,
- &sensor->sensor_update_nb);
+ err = sensor_ops->config_set(sensor->ph, sensor->sensor_info->id,
+ sensor_config);
+ if (err)
dev_err(&iio_dev->dev, "Error in enabling sensor %s err %d",
sensor->sensor_info->name, err);
- }

return err;
}
@@ -120,25 +105,13 @@ static int scmi_iio_buffer_preenable(struct iio_dev *iio_dev)
static int scmi_iio_buffer_postdisable(struct iio_dev *iio_dev)
{
struct scmi_iio_priv *sensor = iio_priv(iio_dev);
- u32 sensor_id = sensor->sensor_info->id;
u32 sensor_config = 0;
int err;

sensor_config |= FIELD_PREP(SCMI_SENS_CFG_SENSOR_ENABLED_MASK,
SCMI_SENS_CFG_SENSOR_DISABLE);
-
- err = sensor->handle->notify_ops->unregister_event_notifier(sensor->handle,
- SCMI_PROTOCOL_SENSOR, SCMI_EVENT_SENSOR_UPDATE,
- &sensor_id, &sensor->sensor_update_nb);
- if (err) {
- dev_err(&iio_dev->dev,
- "Error in unregistering sensor update notifier for sensor %s err %d",
- sensor->sensor_info->name, err);
- return err;
- }
-
- err = sensor->handle->sensor_ops->config_set(sensor->handle, sensor_id,
- sensor_config);
+ err = sensor_ops->config_set(sensor->ph, sensor->sensor_info->id,
+ sensor_config);
if (err) {
dev_err(&iio_dev->dev,
"Error in disabling sensor %s with err %d",
@@ -161,8 +134,8 @@ static int scmi_iio_set_odr_val(struct iio_dev *iio_dev, int val, int val2)
u32 sensor_config;
char buf[32];

- int err = sensor->handle->sensor_ops->config_get(sensor->handle,
- sensor->sensor_info->id, &sensor_config);
+ int err = sensor_ops->config_get(sensor->ph, sensor->sensor_info->id,
+ &sensor_config);
if (err) {
dev_err(&iio_dev->dev,
"Error in getting sensor config for sensor %s err %d",
@@ -208,8 +181,8 @@ static int scmi_iio_set_odr_val(struct iio_dev *iio_dev, int val, int val2)
sensor_config |=
FIELD_PREP(SCMI_SENS_CFG_ROUND_MASK, SCMI_SENS_CFG_ROUND_AUTO);

- err = sensor->handle->sensor_ops->config_set(sensor->handle,
- sensor->sensor_info->id, sensor_config);
+ err = sensor_ops->config_set(sensor->ph, sensor->sensor_info->id,
+ sensor_config);
if (err)
dev_err(&iio_dev->dev,
"Error in setting sensor update interval for sensor %s value %u err %d",
@@ -274,8 +247,8 @@ static int scmi_iio_get_odr_val(struct iio_dev *iio_dev, int *val, int *val2)
u32 sensor_config;
int mult;

- int err = sensor->handle->sensor_ops->config_get(sensor->handle,
- sensor->sensor_info->id, &sensor_config);
+ int err = sensor_ops->config_get(sensor->ph, sensor->sensor_info->id,
+ &sensor_config);
if (err) {
dev_err(&iio_dev->dev,
"Error in getting sensor config for sensor %s err %d",
@@ -542,15 +515,17 @@ static int scmi_iio_buffers_setup(struct iio_dev *scmi_iiodev)
return 0;
}

-static struct iio_dev *scmi_alloc_iiodev(struct device *dev,
- struct scmi_handle *handle,
- const struct scmi_sensor_info *sensor_info)
+static struct iio_dev *
+scmi_alloc_iiodev(struct scmi_device *sdev, struct scmi_protocol_handle *ph,
+ const struct scmi_sensor_info *sensor_info)
{
struct iio_chan_spec *iio_channels;
struct scmi_iio_priv *sensor;
enum iio_modifier modifier;
enum iio_chan_type type;
struct iio_dev *iiodev;
+ struct device *dev = &sdev->dev;
+ const struct scmi_handle *handle = sdev->handle;
int i, ret;

iiodev = devm_iio_device_alloc(dev, sizeof(*sensor));
@@ -560,7 +535,7 @@ static struct iio_dev *scmi_alloc_iiodev(struct device *dev,
iiodev->modes = INDIO_DIRECT_MODE;
iiodev->dev.parent = dev;
sensor = iio_priv(iiodev);
- sensor->handle = handle;
+ sensor->ph = ph;
sensor->sensor_info = sensor_info;
sensor->sensor_update_nb.notifier_call = scmi_iio_sensor_update_cb;
sensor->indio_dev = iiodev;
@@ -595,6 +570,17 @@ static struct iio_dev *scmi_alloc_iiodev(struct device *dev,
sensor_info->axis[i].id);
}

+ ret = handle->notify_ops->devm_event_notifier_register(sdev,
+ SCMI_PROTOCOL_SENSOR, SCMI_EVENT_SENSOR_UPDATE,
+ &sensor->sensor_info->id,
+ &sensor->sensor_update_nb);
+ if (ret) {
+ dev_err(&iiodev->dev,
+ "Error in registering sensor update notifier for sensor %s err %d",
+ sensor->sensor_info->name, ret);
+ return ERR_PTR(ret);
+ }
+
scmi_iio_set_timestamp_channel(&iio_channels[i], i);
iiodev->channels = iio_channels;
return iiodev;
@@ -604,24 +590,29 @@ static int scmi_iio_dev_probe(struct scmi_device *sdev)
{
const struct scmi_sensor_info *sensor_info;
struct scmi_handle *handle = sdev->handle;
+ struct scmi_protocol_handle *ph;
struct device *dev = &sdev->dev;
struct iio_dev *scmi_iio_dev;
u16 nr_sensors;
int err = -ENODEV, i;

- if (!handle || !handle->sensor_ops) {
+ if (!handle)
+ return -ENODEV;
+
+ sensor_ops = handle->devm_protocol_get(sdev, SCMI_PROTOCOL_SENSOR, &ph);
+ if (IS_ERR(sensor_ops)) {
dev_err(dev, "SCMI device has no sensor interface\n");
- return -EINVAL;
+ return PTR_ERR(sensor_ops);
}

- nr_sensors = handle->sensor_ops->count_get(handle);
+ nr_sensors = sensor_ops->count_get(ph);
if (!nr_sensors) {
dev_dbg(dev, "0 sensors found via SCMI bus\n");
return -ENODEV;
}

for (i = 0; i < nr_sensors; i++) {
- sensor_info = handle->sensor_ops->info_get(handle, i);
+ sensor_info = sensor_ops->info_get(ph, i);
if (!sensor_info) {
dev_err(dev, "SCMI sensor %d has missing info\n", i);
return -EINVAL;
@@ -636,7 +627,7 @@ static int scmi_iio_dev_probe(struct scmi_device *sdev)
sensor_info->axis[0].type != RADIANS_SEC)
continue;

- scmi_iio_dev = scmi_alloc_iiodev(dev, handle, sensor_info);
+ scmi_iio_dev = scmi_alloc_iiodev(sdev, ph, sensor_info);
if (IS_ERR(scmi_iio_dev)) {
dev_err(dev,
"failed to allocate IIO device for sensor %s: %ld\n",