From: Renato Lui Geh <renatogeh@gmail.com>
To: lars@metafoo.de, Michael.Hennerich@analog.com, jic23@kernel.org,
knaack.h@gmx.de, pmeerw@pmeerw.net, gregkh@linuxfoundation.org,
giuliano.belinassi@usp.br
Cc: linux-iio@vger.kernel.org, devel@driverdev.osuosl.org,
linux-kernel@vger.kernel.org, kernel-usp@googlegroups.com
Subject: [PATCH v3 2/3] staging: iio: ad7780: update voltage on read
Date: Thu, 1 Nov 2018 11:43:23 -0300 [thread overview]
Message-ID: <1bc4bdf6342d4bc0c2fea17fb3bcd79fabf0e1d1.1541082656.git.renatogeh@gmail.com> (raw)
In-Reply-To: <cover.1541082656.git.renatogeh@gmail.com>
The ad7780 driver previously did not read the correct device output, as
it read an outdated value set at initialization. It now updates its
voltage on read.
Signed-off-by: Renato Lui Geh <renatogeh@gmail.com>
---
Changes in v3:
- removed initialization (int voltage_uv = 0)
- returns error when voltage_uv is null
drivers/staging/iio/adc/ad7780.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/staging/iio/adc/ad7780.c b/drivers/staging/iio/adc/ad7780.c
index 91e016d534ed..f2a11e9424cd 100644
--- a/drivers/staging/iio/adc/ad7780.c
+++ b/drivers/staging/iio/adc/ad7780.c
@@ -87,12 +87,16 @@ static int ad7780_read_raw(struct iio_dev *indio_dev,
long m)
{
struct ad7780_state *st = iio_priv(indio_dev);
+ int voltage_uv;
switch (m) {
case IIO_CHAN_INFO_RAW:
return ad_sigma_delta_single_conversion(indio_dev, chan, val);
case IIO_CHAN_INFO_SCALE:
- *val = st->int_vref_mv * st->gain;
+ voltage_uv = regulator_get_voltage(st->reg);
+ if (!voltage_uv)
+ return -EINVAL;
+ *val = (voltage_uv / 1000) * st->gain;
*val2 = chan->scan_type.realbits - 1;
return IIO_VAL_FRACTIONAL_LOG2;
case IIO_CHAN_INFO_OFFSET:
--
2.19.1
next prev parent reply other threads:[~2018-11-01 14:43 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-01 14:42 [PATCH v3 0/3] staging: iio: ad7780: correct driver read Renato Lui Geh
2018-11-01 14:43 ` [PATCH v3 1/3] staging: iio: ad7780: fix offset read value Renato Lui Geh
2018-11-01 15:02 ` Ardelean, Alexandru
2018-11-03 13:07 ` Jonathan Cameron
2018-11-03 15:59 ` Renato Lui Geh
2018-11-03 17:23 ` Jonathan Cameron
2018-11-01 14:43 ` Renato Lui Geh [this message]
2018-11-01 15:20 ` [PATCH v3 2/3] staging: iio: ad7780: update voltage on read Ardelean, Alexandru
2018-11-03 13:10 ` Jonathan Cameron
2018-11-03 16:06 ` Renato Lui Geh
2018-11-03 17:21 ` Jonathan Cameron
2018-11-01 14:43 ` [PATCH v3 3/3] staging: iio: ad7780: remove unnecessary stashed voltage value Renato Lui Geh
2018-11-01 15:28 ` Ardelean, Alexandru
2018-11-03 13:10 ` Jonathan Cameron
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1bc4bdf6342d4bc0c2fea17fb3bcd79fabf0e1d1.1541082656.git.renatogeh@gmail.com \
--to=renatogeh@gmail.com \
--cc=Michael.Hennerich@analog.com \
--cc=devel@driverdev.osuosl.org \
--cc=giuliano.belinassi@usp.br \
--cc=gregkh@linuxfoundation.org \
--cc=jic23@kernel.org \
--cc=kernel-usp@googlegroups.com \
--cc=knaack.h@gmx.de \
--cc=lars@metafoo.de \
--cc=linux-iio@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=pmeerw@pmeerw.net \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).