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Fri, 6 Mar 2026 10:39:08 -0500 From: Antoniu Miclaus To: Michael Hennerich , Marcelo Schmitt , =?UTF-8?q?Nuno=20S=C3=A1?= , Antoniu Miclaus , Lars-Peter Clausen , Jonathan Cameron , David Lechner , Andy Shevchenko , "Rob Herring" , Krzysztof Kozlowski , "Conor Dooley" , Petre Rodan , Jorge Marques , , , Subject: [PATCH v2 1/4] iio: accel: adxl372: introduce chip_info structure Date: Fri, 6 Mar 2026 17:18:21 +0200 Message-ID: <20260306151859.131934-2-antoniu.miclaus@analog.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260306151859.131934-1-antoniu.miclaus@analog.com> References: <20260306151859.131934-1-antoniu.miclaus@analog.com> 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=J4inLQnS c=1 sm=1 tr=0 ts=69aaf525 cx=c_pps a=3WNzaoukacrqR9RwcOSAdA==:117 a=3WNzaoukacrqR9RwcOSAdA==:17 a=Yq5XynenixoA:10 a=VkNPw1HP01LnGYTKEx00:22 a=0sLvza09kfJOxVLZPwjg:22 a=uXIjobp8t2wMuQ0fPvqm:22 a=gAnH3GRIAAAA:8 a=9K7XyPM_G1Lb3K8B7KgA:9 a=FHz5paCR_PjzkVn5qDnB:22 X-Proofpoint-GUID: QnFslXizclsuwqbu6_o3LwQ6fMRk14MZ X-Proofpoint-ORIG-GUID: QnFslXizclsuwqbu6_o3LwQ6fMRk14MZ X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzA2MDE0NyBTYWx0ZWRfXzHqBxMLuTzLq Zmi2+PLLV8y4jTzKWgXtitxOcW8cKzaXrnT/vPyobvmr1qBioBIa1Dwsv2P8Zm45Xug1NVtcHjz QSvJzLVgQ7hHFjnSHdEcKJWsDzti3ZkYcs7HrLFW0qBNqffQHRyvlXY/egitNxgMTr1BT0OyZJa 0Ap52KlGMPiMAgc52bPE5b97UvrLOIgati2UonJnQiheblFPsf/v8q7uvhcHhf+Jjg7AR6skhfM KMxOH3mMLwwIGjaBxt3J31D2SWGKB1LUXCzZVG7KC364abooKUnl8BrDvpV+ffsiaGWhWiYF9kn svbo4ifsPMLoUj/L9I/kk6iyIlPioHxLPXg5mx3eSXmQymyWIBK6/RubdECN51/5c8y3hT/2Rv0 t/nkcEAxEYmioVNZzfDnhD9Nh/lQubpjH0P0D9kGRgiLPz8BLujY1qOguVrLrA6dHyHb/YQ04aO hdqhUVzWNcZsJ04jjhQ== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-03-06_05,2026-03-06_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 adultscore=0 phishscore=0 malwarescore=0 spamscore=0 priorityscore=1501 impostorscore=0 lowpriorityscore=0 suspectscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2602130000 definitions=main-2603060147 Content-Type: text/plain; charset="utf-8" Introduce a chip_info structure to parameterize device-specific properties such as ODR/bandwidth frequency tables, activity/inactivity timer scale factors, and the maximum ODR value. This refactors the driver to use chip_info lookups instead of hardcoded values, preparing the driver to support multiple device variants. The sampling_frequency and filter_low_pass_3db_frequency available attributes are switched from custom sysfs callbacks to read_avail() based handling via info_mask_shared_by_type_available. This enforces consistent formatting through the IIO framework and makes the values accessible to in-kernel consumers. The SPI/I2C probe functions are updated to pass a chip_info pointer instead of a device name string. No functional change intended. Signed-off-by: Antoniu Miclaus --- Changes in v2: - Switch sampling_frequency and filter_low_pass_3db_frequency available attributes from custom sysfs callbacks to read_avail() with info_mask_shared_by_type_available. drivers/iio/accel/adxl372.c | 125 +++++++++++++++++--------------- drivers/iio/accel/adxl372.h | 16 +++- drivers/iio/accel/adxl372_i2c.c | 12 ++- drivers/iio/accel/adxl372_spi.c | 12 ++- 4 files changed, 96 insertions(+), 69 deletions(-) diff --git a/drivers/iio/accel/adxl372.c b/drivers/iio/accel/adxl372.c index 28a8793a53b6..6918a5834d74 100644 --- a/drivers/iio/accel/adxl372.c +++ b/drivers/iio/accel/adxl372.c @@ -222,6 +222,19 @@ static const int adxl372_bw_freq_tbl[5] =3D { 200, 400, 800, 1600, 3200, }; =20 +const struct adxl372_chip_info adxl372_chip_info =3D { + .name =3D "adxl372", + .samp_freq_tbl =3D adxl372_samp_freq_tbl, + .bw_freq_tbl =3D adxl372_bw_freq_tbl, + .num_freqs =3D ARRAY_SIZE(adxl372_samp_freq_tbl), + .act_time_scale_us =3D 3300, + .act_time_scale_low_us =3D 6600, + .inact_time_scale_ms =3D 13, + .inact_time_scale_low_ms =3D 26, + .max_odr =3D ADXL372_ODR_6400HZ, +}; +EXPORT_SYMBOL_NS_GPL(adxl372_chip_info, "IIO_ADXL372"); + struct adxl372_axis_lookup { unsigned int bits; enum adxl372_fifo_format fifo_format; @@ -260,6 +273,9 @@ static const struct iio_event_spec adxl372_events[] =3D= { .info_mask_shared_by_type =3D BIT(IIO_CHAN_INFO_SCALE) | \ BIT(IIO_CHAN_INFO_SAMP_FREQ) | \ BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY), \ + .info_mask_shared_by_type_available =3D \ + BIT(IIO_CHAN_INFO_SAMP_FREQ) | \ + BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY), \ .scan_index =3D index, \ .scan_type =3D { \ .sign =3D 's', \ @@ -279,6 +295,7 @@ static const struct iio_chan_spec adxl372_channels[] = =3D { }; =20 struct adxl372_state { + const struct adxl372_chip_info *chip_info; int irq; struct device *dev; struct regmap *regmap; @@ -471,13 +488,14 @@ static int adxl372_set_activity_time_ms(struct adxl37= 2_state *st, int ret; =20 /* - * 3.3 ms per code is the scale factor of the TIME_ACT register for - * ODR =3D 6400 Hz. It is 6.6 ms per code for ODR =3D 3200 Hz and below. + * The scale factor of the TIME_ACT register depends on the ODR. + * A higher scale factor is used at the maximum ODR and a lower + * one at all other rates. */ - if (st->odr =3D=3D ADXL372_ODR_6400HZ) - scale_factor =3D 3300; + if (st->odr =3D=3D st->chip_info->max_odr) + scale_factor =3D st->chip_info->act_time_scale_us; else - scale_factor =3D 6600; + scale_factor =3D st->chip_info->act_time_scale_low_us; =20 reg_val =3D DIV_ROUND_CLOSEST(act_time_ms * 1000, scale_factor); =20 @@ -501,13 +519,14 @@ static int adxl372_set_inactivity_time_ms(struct adxl= 372_state *st, int ret; =20 /* - * 13 ms per code is the scale factor of the TIME_INACT register for - * ODR =3D 6400 Hz. It is 26 ms per code for ODR =3D 3200 Hz and below. + * The scale factor of the TIME_INACT register depends on the ODR. + * A higher scale factor is used at the maximum ODR and a lower + * one at all other rates. */ - if (st->odr =3D=3D ADXL372_ODR_6400HZ) - scale_factor =3D 13; + if (st->odr =3D=3D st->chip_info->max_odr) + scale_factor =3D st->chip_info->inact_time_scale_ms; else - scale_factor =3D 26; + scale_factor =3D st->chip_info->inact_time_scale_low_ms; =20 res =3D DIV_ROUND_CLOSEST(inact_time_ms, scale_factor); reg_val_h =3D (res >> 8) & 0xFF; @@ -717,7 +736,7 @@ static int adxl372_setup(struct adxl372_state *st) if (ret < 0) return ret; =20 - ret =3D adxl372_set_odr(st, ADXL372_ODR_6400HZ); + ret =3D adxl372_set_odr(st, st->chip_info->max_odr); if (ret < 0) return ret; =20 @@ -777,10 +796,10 @@ static int adxl372_read_raw(struct iio_dev *indio_dev, *val2 =3D ADXL372_USCALE; return IIO_VAL_INT_PLUS_MICRO; case IIO_CHAN_INFO_SAMP_FREQ: - *val =3D adxl372_samp_freq_tbl[st->odr]; + *val =3D st->chip_info->samp_freq_tbl[st->odr]; return IIO_VAL_INT; case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY: - *val =3D adxl372_bw_freq_tbl[st->bw]; + *val =3D st->chip_info->bw_freq_tbl[st->bw]; return IIO_VAL_INT; } =20 @@ -796,23 +815,17 @@ static int adxl372_write_raw(struct iio_dev *indio_de= v, =20 switch (info) { case IIO_CHAN_INFO_SAMP_FREQ: - odr_index =3D adxl372_find_closest_match(adxl372_samp_freq_tbl, - ARRAY_SIZE(adxl372_samp_freq_tbl), - val); + odr_index =3D adxl372_find_closest_match(st->chip_info->samp_freq_tbl, + st->chip_info->num_freqs, + val); ret =3D adxl372_set_odr(st, odr_index); if (ret < 0) return ret; - /* - * The timer period depends on the ODR selected. - * At 3200 Hz and below, it is 6.6 ms; at 6400 Hz, it is 3.3 ms - */ + /* Recalculate activity time as the timer period depends on ODR */ ret =3D adxl372_set_activity_time_ms(st, st->act_time_ms); if (ret < 0) return ret; - /* - * The timer period depends on the ODR selected. - * At 3200 Hz and below, it is 26 ms; at 6400 Hz, it is 13 ms - */ + /* Recalculate inactivity time as the timer period depends on ODR */ ret =3D adxl372_set_inactivity_time_ms(st, st->inact_time_ms); if (ret < 0) return ret; @@ -825,9 +838,9 @@ static int adxl372_write_raw(struct iio_dev *indio_dev, =20 return ret; case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY: - bw_index =3D adxl372_find_closest_match(adxl372_bw_freq_tbl, - ARRAY_SIZE(adxl372_bw_freq_tbl), - val); + bw_index =3D adxl372_find_closest_match(st->chip_info->bw_freq_tbl, + st->chip_info->num_freqs, + val); return adxl372_set_bandwidth(st, bw_index); default: return -EINVAL; @@ -957,24 +970,6 @@ static int adxl372_write_event_config(struct iio_dev *= indio_dev, const struct ii return adxl372_set_interrupts(st, st->int1_bitmask, 0); } =20 -static ssize_t adxl372_show_filter_freq_avail(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev *indio_dev =3D dev_to_iio_dev(dev); - struct adxl372_state *st =3D iio_priv(indio_dev); - int i; - size_t len =3D 0; - - for (i =3D 0; i <=3D st->odr; i++) - len +=3D scnprintf(buf + len, PAGE_SIZE - len, - "%d ", adxl372_bw_freq_tbl[i]); - - buf[len - 1] =3D '\n'; - - return len; -} - static ssize_t adxl372_get_fifo_enabled(struct device *dev, struct device_attribute *attr, char *buf) @@ -1142,25 +1137,34 @@ static const struct iio_trigger_ops adxl372_peak_da= ta_trigger_ops =3D { .set_trigger_state =3D adxl372_peak_dready_trig_set_state, }; =20 -static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("400 800 1600 3200 6400"); -static IIO_DEVICE_ATTR(in_accel_filter_low_pass_3db_frequency_available, - 0444, adxl372_show_filter_freq_avail, NULL, 0); - -static struct attribute *adxl372_attributes[] =3D { - &iio_const_attr_sampling_frequency_available.dev_attr.attr, - &iio_dev_attr_in_accel_filter_low_pass_3db_frequency_available.dev_attr.a= ttr, - NULL, -}; +static int adxl372_read_avail(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + const int **vals, int *type, int *length, + long mask) +{ + struct adxl372_state *st =3D iio_priv(indio_dev); =20 -static const struct attribute_group adxl372_attrs_group =3D { - .attrs =3D adxl372_attributes, -}; + switch (mask) { + case IIO_CHAN_INFO_SAMP_FREQ: + *vals =3D st->chip_info->samp_freq_tbl; + *type =3D IIO_VAL_INT; + *length =3D st->chip_info->num_freqs; + return IIO_AVAIL_LIST; + case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY: + *vals =3D st->chip_info->bw_freq_tbl; + *type =3D IIO_VAL_INT; + *length =3D st->odr + 1; + return IIO_AVAIL_LIST; + default: + return -EINVAL; + } +} =20 static const struct iio_info adxl372_info =3D { .validate_trigger =3D &adxl372_validate_trigger, - .attrs =3D &adxl372_attrs_group, .read_raw =3D adxl372_read_raw, .write_raw =3D adxl372_write_raw, + .read_avail =3D adxl372_read_avail, .read_event_config =3D adxl372_read_event_config, .write_event_config =3D adxl372_write_event_config, .read_event_value =3D adxl372_read_event_value, @@ -1176,7 +1180,7 @@ bool adxl372_readable_noinc_reg(struct device *dev, u= nsigned int reg) EXPORT_SYMBOL_NS_GPL(adxl372_readable_noinc_reg, "IIO_ADXL372"); =20 int adxl372_probe(struct device *dev, struct regmap *regmap, - int irq, const char *name) + int irq, const struct adxl372_chip_info *chip_info) { struct iio_dev *indio_dev; struct adxl372_state *st; @@ -1192,13 +1196,14 @@ int adxl372_probe(struct device *dev, struct regmap= *regmap, st->dev =3D dev; st->regmap =3D regmap; st->irq =3D irq; + st->chip_info =3D chip_info; =20 mutex_init(&st->threshold_m); =20 indio_dev->channels =3D adxl372_channels; indio_dev->num_channels =3D ARRAY_SIZE(adxl372_channels); indio_dev->available_scan_masks =3D adxl372_channel_masks; - indio_dev->name =3D name; + indio_dev->name =3D chip_info->name; indio_dev->info =3D &adxl372_info; indio_dev->modes =3D INDIO_DIRECT_MODE | INDIO_BUFFER_SOFTWARE; =20 diff --git a/drivers/iio/accel/adxl372.h b/drivers/iio/accel/adxl372.h index 80a0aa9714fc..3ce06609446c 100644 --- a/drivers/iio/accel/adxl372.h +++ b/drivers/iio/accel/adxl372.h @@ -10,8 +10,22 @@ =20 #define ADXL372_REVID 0x03 =20 +struct adxl372_chip_info { + const char *name; + const int *samp_freq_tbl; + const int *bw_freq_tbl; + unsigned int num_freqs; + unsigned int act_time_scale_us; + unsigned int act_time_scale_low_us; + unsigned int inact_time_scale_ms; + unsigned int inact_time_scale_low_ms; + unsigned int max_odr; +}; + +extern const struct adxl372_chip_info adxl372_chip_info; + int adxl372_probe(struct device *dev, struct regmap *regmap, - int irq, const char *name); + int irq, const struct adxl372_chip_info *chip_info); bool adxl372_readable_noinc_reg(struct device *dev, unsigned int reg); =20 #endif /* _ADXL372_H_ */ diff --git a/drivers/iio/accel/adxl372_i2c.c b/drivers/iio/accel/adxl372_i2= c.c index 186d4fe9a556..3f97126a87a1 100644 --- a/drivers/iio/accel/adxl372_i2c.c +++ b/drivers/iio/accel/adxl372_i2c.c @@ -20,11 +20,15 @@ static const struct regmap_config adxl372_regmap_config= =3D { =20 static int adxl372_i2c_probe(struct i2c_client *client) { - const struct i2c_device_id *id =3D i2c_client_get_device_id(client); + const struct adxl372_chip_info *chip_info; struct regmap *regmap; unsigned int regval; int ret; =20 + chip_info =3D i2c_get_match_data(client); + if (!chip_info) + return -ENODEV; + regmap =3D devm_regmap_init_i2c(client, &adxl372_regmap_config); if (IS_ERR(regmap)) return PTR_ERR(regmap); @@ -38,17 +42,17 @@ static int adxl372_i2c_probe(struct i2c_client *client) dev_warn(&client->dev, "I2C might not work properly with other devices on the bus"); =20 - return adxl372_probe(&client->dev, regmap, client->irq, id->name); + return adxl372_probe(&client->dev, regmap, client->irq, chip_info); } =20 static const struct i2c_device_id adxl372_i2c_id[] =3D { - { "adxl372" }, + { "adxl372", (kernel_ulong_t)&adxl372_chip_info }, { } }; MODULE_DEVICE_TABLE(i2c, adxl372_i2c_id); =20 static const struct of_device_id adxl372_of_match[] =3D { - { .compatible =3D "adi,adxl372" }, + { .compatible =3D "adi,adxl372", .data =3D &adxl372_chip_info }, { } }; MODULE_DEVICE_TABLE(of, adxl372_of_match); diff --git a/drivers/iio/accel/adxl372_spi.c b/drivers/iio/accel/adxl372_sp= i.c index 39941b519c3b..0e199feb405e 100644 --- a/drivers/iio/accel/adxl372_spi.c +++ b/drivers/iio/accel/adxl372_spi.c @@ -22,24 +22,28 @@ static const struct regmap_config adxl372_spi_regmap_co= nfig =3D { =20 static int adxl372_spi_probe(struct spi_device *spi) { - const struct spi_device_id *id =3D spi_get_device_id(spi); + const struct adxl372_chip_info *chip_info; struct regmap *regmap; =20 + chip_info =3D spi_get_device_match_data(spi); + if (!chip_info) + return -ENODEV; + regmap =3D devm_regmap_init_spi(spi, &adxl372_spi_regmap_config); if (IS_ERR(regmap)) return PTR_ERR(regmap); =20 - return adxl372_probe(&spi->dev, regmap, spi->irq, id->name); + return adxl372_probe(&spi->dev, regmap, spi->irq, chip_info); } =20 static const struct spi_device_id adxl372_spi_id[] =3D { - { "adxl372", 0 }, + { "adxl372", (kernel_ulong_t)&adxl372_chip_info }, { } }; MODULE_DEVICE_TABLE(spi, adxl372_spi_id); =20 static const struct of_device_id adxl372_of_match[] =3D { - { .compatible =3D "adi,adxl372" }, + { .compatible =3D "adi,adxl372", .data =3D &adxl372_chip_info }, { } }; MODULE_DEVICE_TABLE(of, adxl372_of_match); --=20 2.43.0