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Mon, 7 Jul 2025 09:51:33 -0400 From: Marcelo Schmitt To: , , , CC: , , , , , , , , , , , , , , Subject: [PATCH v8 04/12] iio: adc: ad4170-4: Add support for calibration bias Date: Mon, 7 Jul 2025 10:51:29 -0300 Message-ID: X-Mailer: git-send-email 2.39.2 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ADIRuleOP-NewSCL: Rule Triggered X-Authority-Analysis: v=2.4 cv=AP9nYgXq c=1 sm=1 tr=0 ts=686bd0f6 cx=c_pps a=PpDZqlmH/M8setHirZLBMw==:117 a=PpDZqlmH/M8setHirZLBMw==:17 a=Wb1JkmetP80A:10 a=gAnH3GRIAAAA:8 a=1daVv4cnZmPfqeT0XEsA:9 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNzA3MDA4MCBTYWx0ZWRfX5J1ivM8B4gJV 24aBwFwtqTrsnTET5B+G3698ZJ9//yp97a01mQYKiXyLEEVBr74udKugWH8d1aQ4uJWrFYJcZ+p XvzPUnga41LAvqh07N1iXuaox+SaPOLYGg03CIwwhpDRuEqrS8LCgHFizZbQoSv2d0WpkhvFugf SPkJ2vYmXD52Ovp6EGW/GhRtmtCJSAbnGP2OSjlLEpUu1CEhSCly+9jRyVbF1zuwoDJmlCLwg0Z CICkTiJNCdUm0zrVOmtm+X7FQ8A+sgjoxrLW1TT9jUfg4wOQYVGBY3INIHAZkYl6jsue7SfmzY3 UbfsOT1cfhqI6oAIl0+pmwmoAKIUOj2WJZdoXqU7s911L2cJk2r1Ix4Hi6+ZJaqyDGq1PgLK92X 6E0YhmMTHCpOjLBDyEYLU6kqQO1Rhtldm7PnLTB5n0AxH8OQ4lUysJvQDTqtO8dIL0m1e5w5 X-Proofpoint-ORIG-GUID: nfnwn7AX7WwlqRLKVY9Qe-jo4U5546ya X-Proofpoint-GUID: nfnwn7AX7WwlqRLKVY9Qe-jo4U5546ya X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.1.7,FMLib:17.12.80.40 definitions=2025-07-07_03,2025-07-07_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 mlxlogscore=999 mlxscore=0 bulkscore=0 priorityscore=1501 clxscore=1015 lowpriorityscore=0 impostorscore=0 malwarescore=0 adultscore=0 spamscore=0 phishscore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2505280000 definitions=main-2507070080 Content-Type: text/plain; charset="utf-8" Add support for ADC calibration bias/offset configuration. Signed-off-by: Marcelo Schmitt --- No changes since v5. drivers/iio/adc/ad4170-4.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/drivers/iio/adc/ad4170-4.c b/drivers/iio/adc/ad4170-4.c index c314675a9ad1..3b880d7a7ed0 100644 --- a/drivers/iio/adc/ad4170-4.c +++ b/drivers/iio/adc/ad4170-4.c @@ -626,6 +626,7 @@ static const struct iio_chan_spec ad4170_channel_templa= te =3D { .differential =3D 1, .info_mask_separate =3D BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE) | + BIT(IIO_CHAN_INFO_CALIBBIAS) | BIT(IIO_CHAN_INFO_CALIBSCALE) | BIT(IIO_CHAN_INFO_OFFSET), .info_mask_separate_available =3D BIT(IIO_CHAN_INFO_SCALE), @@ -949,6 +950,9 @@ static int ad4170_read_raw(struct iio_dev *indio_dev, pga =3D FIELD_GET(AD4170_AFE_PGA_GAIN_MSK, setup->afe); *val =3D chan_info->offset_tbl[pga]; return IIO_VAL_INT; + case IIO_CHAN_INFO_CALIBBIAS: + *val =3D setup->offset; + return IIO_VAL_INT; case IIO_CHAN_INFO_CALIBSCALE: *val =3D setup->gain; return IIO_VAL_INT; @@ -1066,6 +1070,18 @@ static int ad4170_set_pga(struct ad4170_state *st, return ad4170_write_channel_setup(st, chan->address, false); } =20 +static int ad4170_set_calib_offset(struct ad4170_state *st, + struct iio_chan_spec const *chan, int val) +{ + struct ad4170_chan_info *chan_info =3D &st->chan_infos[chan->address]; + struct ad4170_setup *setup =3D &chan_info->setup; + + guard(mutex)(&st->lock); + setup->offset =3D val; + + return ad4170_write_channel_setup(st, chan->address, false); +} + static int ad4170_set_calib_gain(struct ad4170_state *st, struct iio_chan_spec const *chan, int val) { @@ -1087,6 +1103,8 @@ static int __ad4170_write_raw(struct iio_dev *indio_d= ev, switch (info) { case IIO_CHAN_INFO_SCALE: return ad4170_set_pga(st, chan, val, val2); + case IIO_CHAN_INFO_CALIBBIAS: + return ad4170_set_calib_offset(st, chan, val); case IIO_CHAN_INFO_CALIBSCALE: return ad4170_set_calib_gain(st, chan, val); default: @@ -1115,6 +1133,7 @@ static int ad4170_write_raw_get_fmt(struct iio_dev *i= ndio_dev, switch (info) { case IIO_CHAN_INFO_SCALE: return IIO_VAL_INT_PLUS_NANO; + case IIO_CHAN_INFO_CALIBBIAS: case IIO_CHAN_INFO_CALIBSCALE: return IIO_VAL_INT; default: --=20 2.47.2