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| author | David Lechner <dlechner@baylibre.com> | 2023-10-06 03:50:32 +0300 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2023-10-11 17:54:41 +0300 |
| commit | 40efeec7600949c2f6319c11d8a7f294a1c5e590 (patch) | |
| tree | 89daee9d25e04ba4fd53c80eb58bb25d11af824c /drivers/staging/iio | |
| parent | 1638b6d4f7c9515a6c26b2401ab3624fcef20916 (diff) | |
| download | linux-40efeec7600949c2f6319c11d8a7f294a1c5e590.tar.xz | |
staging: iio: resolver: ad2s1210: add label attribute support
The ad2s1210 resolver driver has quite a few channels, mostly for
internal signals for event support. This makes it difficult to know
which channel is which. This patch adds a label attribute to the
channels to make it easier to identify them.
Signed-off-by: David Lechner <dlechner@baylibre.com>
Link: https://lore.kernel.org/r/20231005-ad2s1210-mainline-v4-15-ec00746840fc@baylibre.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/staging/iio')
| -rw-r--r-- | drivers/staging/iio/resolver/ad2s1210.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/staging/iio/resolver/ad2s1210.c b/drivers/staging/iio/resolver/ad2s1210.c index b843a1f5b45a..2d7b9bfeabd3 100644 --- a/drivers/staging/iio/resolver/ad2s1210.c +++ b/drivers/staging/iio/resolver/ad2s1210.c @@ -1158,6 +1158,34 @@ error_ret: return ret; } +static int ad2s1210_read_label(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + char *label) +{ + if (chan->type == IIO_ANGL) { + if (chan->channel == 0) + return sprintf(label, "position\n"); + if (chan->channel == 1) + return sprintf(label, "tracking error\n"); + } + if (chan->type == IIO_ANGL_VEL) + return sprintf(label, "velocity\n"); + if (chan->type == IIO_PHASE) + return sprintf(label, "synthetic reference\n"); + if (chan->type == IIO_ALTVOLTAGE) { + if (chan->output) + return sprintf(label, "excitation\n"); + if (chan->channel == 0) + return sprintf(label, "monitor signal\n"); + if (chan->channel == 1) + return sprintf(label, "cosine\n"); + if (chan->channel == 2) + return sprintf(label, "sine\n"); + } + + return -EINVAL; +} + static int ad2s1210_read_event_value(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, enum iio_event_type type, @@ -1338,6 +1366,7 @@ static const struct iio_info ad2s1210_info = { .read_raw = ad2s1210_read_raw, .read_avail = ad2s1210_read_avail, .write_raw = ad2s1210_write_raw, + .read_label = ad2s1210_read_label, .attrs = &ad2s1210_attribute_group, .read_event_value = ad2s1210_read_event_value, .write_event_value = ad2s1210_write_event_value, |