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[5/6] staging:iio:ad2s90: Add IIO_CHAN_INFO_SCALE to channel spec and read_raw

Message ID 20181026004512.31012-6-matheus.bernardino@usp.br (mailing list archive)
State New, archived
Headers show
Series staging:iio:ad2s90: Add scale info and improve error handling | expand

Commit Message

Matheus Tavares Oct. 26, 2018, 12:45 a.m. UTC 
From: Victor Colombo <victorcolombo@gmail.com>

This patch adds the IIO_CHAN_INFO_SCALE mask to ad2s90_chan and
implements the relative read behavior at ad2s90_read_raw.

Signed-off-by: Victor Colombo <victorcolombo@gmail.com>
---
 drivers/staging/iio/resolver/ad2s90.c | 32 ++++++++++++++++++---------
 1 file changed, 22 insertions(+), 10 deletions(-)

Comments

Dan Carpenter Oct. 26, 2018, 10:04 a.m. UTC | #1 
On Thu, Oct 25, 2018 at 09:45:11PM -0300, Matheus Tavares wrote:
> From: Victor Colombo <victorcolombo@gmail.com>
> 
> This patch adds the IIO_CHAN_INFO_SCALE mask to ad2s90_chan and
> implements the relative read behavior at ad2s90_read_raw.
> 
> Signed-off-by: Victor Colombo <victorcolombo@gmail.com>
> ---

You should be adding your S-o-B here as well because the patch is
passing through your hands.

regards,
dan carpenter
Matheus Tavares Oct. 26, 2018, 6:56 p.m. UTC | #2 
On Fri, Oct 26, 2018 at 7:04 AM Dan Carpenter <dan.carpenter@oracle.com> wrote:
>
> On Thu, Oct 25, 2018 at 09:45:11PM -0300, Matheus Tavares wrote:
> > From: Victor Colombo <victorcolombo@gmail.com>
> >
> > This patch adds the IIO_CHAN_INFO_SCALE mask to ad2s90_chan and
> > implements the relative read behavior at ad2s90_read_raw.
> >
> > Signed-off-by: Victor Colombo <victorcolombo@gmail.com>
> > ---
>
> You should be adding your S-o-B here as well because the patch is
> passing through your hands.

Thanks for the review! I'll be sending a v2 with my S-o-B there.

> regards,
> dan carpenter
>
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diff mbox series

Patch

diff --git a/drivers/staging/iio/resolver/ad2s90.c b/drivers/staging/iio/resolver/ad2s90.c
index b4a6a89c11b0..52b656875ed1 100644
--- a/drivers/staging/iio/resolver/ad2s90.c
+++ b/drivers/staging/iio/resolver/ad2s90.c
@@ -34,19 +34,31 @@  static int ad2s90_read_raw(struct iio_dev *indio_dev,
 	int ret;
 	struct ad2s90_state *st = iio_priv(indio_dev);
 
-	mutex_lock(&st->lock);
+	switch (m) {
+	case IIO_CHAN_INFO_SCALE:
+		/* 2 * Pi / (2^12 - 1) ~= 0.001534355 */
+		*val = 0;
+		*val2 = 1534355;
+		return IIO_VAL_INT_PLUS_NANO;
+	case IIO_CHAN_INFO_RAW:
+		mutex_lock(&st->lock);
+
+		ret = spi_read(st->sdev, st->rx, 2);
+		if (ret < 0) {
+			mutex_unlock(&st->lock);
+			return ret;
+		}
+
+		*val = (((u16)(st->rx[0])) << 4) | ((st->rx[1] & 0xF0) >> 4);
 
-	ret = spi_read(st->sdev, st->rx, 2);
-	if (ret < 0) {
 		mutex_unlock(&st->lock);
-		return ret;
-	}
 
-	*val = (((u16)(st->rx[0])) << 4) | ((st->rx[1] & 0xF0) >> 4);
-
-	mutex_unlock(&st->lock);
+		return IIO_VAL_INT;
+	default:
+		break;
+	}
 
-	return IIO_VAL_INT;
+	return -EINVAL;
 }
 
 static const struct iio_info ad2s90_info = {
@@ -57,7 +69,7 @@  static const struct iio_chan_spec ad2s90_chan = {
 	.type = IIO_ANGL,
 	.indexed = 1,
 	.channel = 0,
-	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
 };
 
 static int ad2s90_probe(struct spi_device *spi)