Re: [PATCH v2 1/1] iio/scmi: Add reading "raw" attribute.

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Hi Jonathan,

Thank you for review!

Regards,
Andriy.

On 30.09.21 19:33, Jonathan Cameron wrote:
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On Mon, 27 Sep 2021 16:22:02 +0300
Andriy Tryshnivskyy <andriy.tryshnivskyy@xxxxxxxxxxxxxxx> wrote:

Add IIO_CHAN_INFO_RAW to the mask and implement corresponding
reading "raw" attribute in scmi_iio_read_raw.

Signed-off-by: Andriy Tryshnivskyy <andriy.tryshnivskyy@xxxxxxxxxxxxxxx>
Hi Andriy,

Looks good to me, but I'll leave it on list to get feedback form the
driver maintainer for this one.

Feel free to poke if no reply in next 2 weeks.

Thanks,

Jonathan

---
  drivers/iio/common/scmi_sensors/scmi_iio.c | 45 +++++++++++++++++++++-
  1 file changed, 44 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/common/scmi_sensors/scmi_iio.c b/drivers/iio/common/scmi_sensors/scmi_iio.c
index 7cf2bf282cef..c6a9dc6ad140 100644
--- a/drivers/iio/common/scmi_sensors/scmi_iio.c
+++ b/drivers/iio/common/scmi_sensors/scmi_iio.c
@@ -286,6 +286,9 @@ static int scmi_iio_read_raw(struct iio_dev *iio_dev,
       struct scmi_iio_priv *sensor = iio_priv(iio_dev);
       s8 scale;
       int ret;
+     int err;
+     u32 sensor_config;
+     struct scmi_sensor_reading readings[SCMI_IIO_NUM_OF_AXIS];

       switch (mask) {
       case IIO_CHAN_INFO_SCALE:
@@ -300,6 +303,45 @@ static int scmi_iio_read_raw(struct iio_dev *iio_dev,
       case IIO_CHAN_INFO_SAMP_FREQ:
               ret = scmi_iio_get_odr_val(iio_dev, val, val2);
               return ret ? ret : IIO_VAL_INT_PLUS_MICRO;
+     case IIO_CHAN_INFO_RAW:
+             sensor_config = FIELD_PREP(SCMI_SENS_CFG_SENSOR_ENABLED_MASK,
+                                        SCMI_SENS_CFG_SENSOR_ENABLE);
+             err = sensor->handle->sensor_ops->config_set(
+                     sensor->handle, 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;
+             }
+
+             err = sensor->handle->sensor_ops->reading_get_timestamped(
+                     sensor->handle, sensor->sensor_info->id,
+                     sensor->sensor_info->num_axis, readings);
+             if (err) {
+                     dev_err(&iio_dev->dev,
+                             "Error in reading raw attribute for sensor %s err %d",
+                             sensor->sensor_info->name, err);
+                     return err;
+             }
+
+             sensor_config = FIELD_PREP(SCMI_SENS_CFG_SENSOR_ENABLED_MASK,
+                                        SCMI_SENS_CFG_SENSOR_DISABLE);
+             err = sensor->handle->sensor_ops->config_set(
+                     sensor->handle, 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;
+             }
+             /* Check if raw value fits 32 bits */
+             if (readings[ch->scan_index].value < INT_MIN ||
+                 readings[ch->scan_index].value > INT_MAX)
+                     return -ERANGE;
+             /* Use 32-bit value, since practically there is no need in 64 bits */
+             *val = (int)readings[ch->scan_index].value;
+             return IIO_VAL_INT;
       default:
               return -EINVAL;
       }
@@ -381,7 +423,8 @@ static void scmi_iio_set_data_channel(struct iio_chan_spec *iio_chan,
       iio_chan->type = type;
       iio_chan->modified = 1;
       iio_chan->channel2 = mod;
-     iio_chan->info_mask_separate = BIT(IIO_CHAN_INFO_SCALE);
+     iio_chan->info_mask_separate =
+             BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_RAW);
       iio_chan->info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ);
       iio_chan->info_mask_shared_by_type_available =
               BIT(IIO_CHAN_INFO_SAMP_FREQ);




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