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SubjectRe: [PATCH 1/2] iio: cros_ec: do an early exit if not physical_device case
On Mon, 23 Nov 2020 16:40:16 +0200
Alexandru Ardelean <alexandru.ardelean@analog.com> wrote:

> This whole code-block was put under one big if() condition/block.
> This change does an early return if the 'physical_device' boolean is false,
> thus unindenting the block by one level.
>
> No other functional change has been done.
>
> Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
@Gwendal, others This series from Alex has been outstanding for a while
but may well still apply.
Ideally looking for an ack.

Thanks,

Jonathan

> ---
> .../cros_ec_sensors/cros_ec_sensors_core.c | 161 +++++++++---------
> 1 file changed, 81 insertions(+), 80 deletions(-)
>
> diff --git a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
> index 5c6c4e6fec9b..9470014936f2 100644
> --- a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
> +++ b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
> @@ -287,89 +287,90 @@ int cros_ec_sensors_core_init(struct platform_device *pdev,
>
> indio_dev->name = pdev->name;
>
> - if (physical_device) {
> - state->param.cmd = MOTIONSENSE_CMD_INFO;
> - state->param.info.sensor_num = sensor_platform->sensor_num;
> - ret = cros_ec_motion_send_host_cmd(state, 0);
> - if (ret) {
> - dev_warn(dev, "Can not access sensor info\n");
> + if (!physical_device)
> + return 0;
> +
> + state->param.cmd = MOTIONSENSE_CMD_INFO;
> + state->param.info.sensor_num = sensor_platform->sensor_num;
> + ret = cros_ec_motion_send_host_cmd(state, 0);
> + if (ret) {
> + dev_warn(dev, "Can not access sensor info\n");
> + return ret;
> + }
> + state->type = state->resp->info.type;
> + state->loc = state->resp->info.location;
> +
> + /* Set sign vector, only used for backward compatibility. */
> + memset(state->sign, 1, CROS_EC_SENSOR_MAX_AXIS);
> +
> + for (i = CROS_EC_SENSOR_X; i < CROS_EC_SENSOR_MAX_AXIS; i++)
> + state->calib[i].scale = MOTION_SENSE_DEFAULT_SCALE;
> +
> + /* 0 is a correct value used to stop the device */
> + if (state->msg->version < 3) {
> + get_default_min_max_freq(state->resp->info.type,
> + &frequencies[1],
> + &frequencies[2],
> + &state->fifo_max_event_count);
> + } else {
> + frequencies[1] = state->resp->info_3.min_frequency;
> + frequencies[2] = state->resp->info_3.max_frequency;
> + state->fifo_max_event_count =
> + state->resp->info_3.fifo_max_event_count;
> + }
> + for (i = 0; i < ARRAY_SIZE(frequencies); i++) {
> + state->frequencies[2 * i] = frequencies[i] / 1000;
> + state->frequencies[2 * i + 1] =
> + (frequencies[i] % 1000) * 1000;
> + }
> +
> + if (cros_ec_check_features(ec, EC_FEATURE_MOTION_SENSE_FIFO)) {
> + /*
> + * Create a software buffer, feed by the EC FIFO.
> + * We can not use trigger here, as events are generated
> + * as soon as sample_frequency is set.
> + */
> + struct iio_buffer *buffer;
> +
> + buffer = devm_iio_kfifo_allocate(dev);
> + if (!buffer)
> + return -ENOMEM;
> +
> + iio_device_attach_buffer(indio_dev, buffer);
> + indio_dev->modes = INDIO_BUFFER_SOFTWARE;
> +
> + ret = cros_ec_sensorhub_register_push_data(
> + sensor_hub, sensor_platform->sensor_num,
> + indio_dev, push_data);
> + if (ret)
> return ret;
> - }
> - state->type = state->resp->info.type;
> - state->loc = state->resp->info.location;
>
> - /* Set sign vector, only used for backward compatibility. */
> - memset(state->sign, 1, CROS_EC_SENSOR_MAX_AXIS);
> + ret = devm_add_action_or_reset(
> + dev, cros_ec_sensors_core_clean, pdev);
> + if (ret)
> + return ret;
>
> - for (i = CROS_EC_SENSOR_X; i < CROS_EC_SENSOR_MAX_AXIS; i++)
> - state->calib[i].scale = MOTION_SENSE_DEFAULT_SCALE;
> -
> - /* 0 is a correct value used to stop the device */
> - if (state->msg->version < 3) {
> - get_default_min_max_freq(state->resp->info.type,
> - &frequencies[1],
> - &frequencies[2],
> - &state->fifo_max_event_count);
> - } else {
> - frequencies[1] = state->resp->info_3.min_frequency;
> - frequencies[2] = state->resp->info_3.max_frequency;
> - state->fifo_max_event_count =
> - state->resp->info_3.fifo_max_event_count;
> - }
> - for (i = 0; i < ARRAY_SIZE(frequencies); i++) {
> - state->frequencies[2 * i] = frequencies[i] / 1000;
> - state->frequencies[2 * i + 1] =
> - (frequencies[i] % 1000) * 1000;
> - }
> -
> - if (cros_ec_check_features(ec, EC_FEATURE_MOTION_SENSE_FIFO)) {
> - /*
> - * Create a software buffer, feed by the EC FIFO.
> - * We can not use trigger here, as events are generated
> - * as soon as sample_frequency is set.
> - */
> - struct iio_buffer *buffer;
> -
> - buffer = devm_iio_kfifo_allocate(dev);
> - if (!buffer)
> - return -ENOMEM;
> -
> - iio_device_attach_buffer(indio_dev, buffer);
> - indio_dev->modes = INDIO_BUFFER_SOFTWARE;
> -
> - ret = cros_ec_sensorhub_register_push_data(
> - sensor_hub, sensor_platform->sensor_num,
> - indio_dev, push_data);
> - if (ret)
> - return ret;
> -
> - ret = devm_add_action_or_reset(
> - dev, cros_ec_sensors_core_clean, pdev);
> - if (ret)
> - return ret;
> -
> - /* Timestamp coming from FIFO are in ns since boot. */
> - ret = iio_device_set_clock(indio_dev, CLOCK_BOOTTIME);
> - if (ret)
> - return ret;
> - } else {
> - const struct attribute **fifo_attrs;
> -
> - if (has_hw_fifo)
> - fifo_attrs = cros_ec_sensor_fifo_attributes;
> - else
> - fifo_attrs = NULL;
> -
> - /*
> - * The only way to get samples in buffer is to set a
> - * software trigger (systrig, hrtimer).
> - */
> - ret = devm_iio_triggered_buffer_setup_ext(
> - dev, indio_dev, NULL, trigger_capture,
> - NULL, fifo_attrs);
> - if (ret)
> - return ret;
> - }
> + /* Timestamp coming from FIFO are in ns since boot. */
> + ret = iio_device_set_clock(indio_dev, CLOCK_BOOTTIME);
> + if (ret)
> + return ret;
> + } else {
> + const struct attribute **fifo_attrs;
> +
> + if (has_hw_fifo)
> + fifo_attrs = cros_ec_sensor_fifo_attributes;
> + else
> + fifo_attrs = NULL;
> +
> + /*
> + * The only way to get samples in buffer is to set a
> + * software trigger (systrig, hrtimer).
> + */
> + ret = devm_iio_triggered_buffer_setup_ext(
> + dev, indio_dev, NULL, trigger_capture,
> + NULL, fifo_attrs);
> + if (ret)
> + return ret;
> }
>
> return 0;

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