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Mon, 2 Jun 2025 07:37:53 -0400 From: Marcelo Schmitt To: , , , CC: , , , , , , , , , , , Subject: [PATCH v4 04/11] iio: adc: ad4170: Add support for calibration bias Date: Mon, 2 Jun 2025 08:37:48 -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-Proofpoint-GUID: ge2f6TRS1SoWUMQsDEw0dDg8Z_IgutmP X-Proofpoint-ORIG-GUID: ge2f6TRS1SoWUMQsDEw0dDg8Z_IgutmP X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNjAyMDEwMCBTYWx0ZWRfXxknIbl2C7sQy dr+F31wiyU3qJhCHVmaNI3iqbAuGgK1qUttnF27VtFzxZq9rePzA7Ts0TGDhzT8IOvfi9vgIobK GS+N9JsFVogNnm/r7V1qJAn2e27lLCUYm8wLu1nHF3I6abNLFUq63IzCB12kJITEPGllyY+3rUJ x6jeQNrXv5PfsI/TdM15B+rHbplzKKscxHDTNMRZZa+9lFFfAKJmOrUWpe7QyTOgMVA9hrKskcl k0S4pM0xptt/H8Yfm/EPbaeI1MMtZZJcpdrosJg1JxpBYjWmJe13kpH6rUhhWtdlplT46MdrsMT i1tY4qNj+BPqW0WW9fSNjk0KDSlDorapE79Ht7wvJzvg7OvXSbjQP1ggg+Zm8q6+gBkAKPWfj0V WDYgiOk4naTrScGpc06U1oN5WLFXKdB/byL7kQQUEc2DahITUeTyVkR/soiXTUaYQKmBSJLk X-Authority-Analysis: v=2.4 cv=DY4XqutW c=1 sm=1 tr=0 ts=683d8d2c cx=c_pps a=3WNzaoukacrqR9RwcOSAdA==:117 a=3WNzaoukacrqR9RwcOSAdA==:17 a=6IFa9wvqVegA:10 a=gAnH3GRIAAAA:8 a=1daVv4cnZmPfqeT0XEsA:9 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.0.736,FMLib:17.12.80.40 definitions=2025-06-02_05,2025-05-30_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 mlxlogscore=999 priorityscore=1501 lowpriorityscore=0 suspectscore=0 spamscore=0 clxscore=1015 malwarescore=0 adultscore=0 bulkscore=0 impostorscore=0 phishscore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2505160000 definitions=main-2506020100 Content-Type: text/plain; charset="utf-8" Add support for ADC calibration bias/offset configuration. Signed-off-by: Marcelo Schmitt --- Change log v3 -> v4 - No longer restoring calib gain or calib offset on reg write fail. drivers/iio/adc/ad4170.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/drivers/iio/adc/ad4170.c b/drivers/iio/adc/ad4170.c index 98e38fabc725..b109ebf3347d 100644 --- a/drivers/iio/adc/ad4170.c +++ b/drivers/iio/adc/ad4170.c @@ -632,6 +632,7 @@ static const struct iio_chan_spec ad4170_channel_templa= te =3D { .info_mask_separate =3D BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OFFSET) | + BIT(IIO_CHAN_INFO_CALIBBIAS) | BIT(IIO_CHAN_INFO_CALIBSCALE), .info_mask_separate_available =3D BIT(IIO_CHAN_INFO_SCALE), .scan_type =3D { @@ -946,6 +947,9 @@ 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; @@ -1063,6 +1067,18 @@ 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) { @@ -1084,6 +1100,8 @@ 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: @@ -1112,6 +1130,7 @@ 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