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patch "iio: humditiy: hdc3020: fix units for thresholds and hysteresis" added to char-misc-linus

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled iio: humditiy: hdc3020: fix units for thresholds and hysteresis to my char-misc git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git in the char-misc-linus branch. The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.) The patch will hopefully also be merged in Linus's tree for the next -rc kernel release. If you have any questions about this process, please let me know. From cb372b4f46d4285e5d2c07ba734374151b8e34e7 Mon Sep 17 00:00:00 2001 From: Dimitri Fedrau <dimitri.fedrau(a)liebherr.com> Date: Thu, 16 Oct 2025 07:20:39 +0200 Subject: iio: humditiy: hdc3020: fix units for thresholds and hysteresis According to the ABI the units after application of scale and offset are milli degree celsius for temperature thresholds and milli percent for relative humidity thresholds. Currently the resulting units are degree celsius for temperature thresholds and hysteresis and percent for relative humidity thresholds and hysteresis. Change scale factor to fix this issue. Fixes: 3ad0e7e5f0cb ("iio: humidity: hdc3020: add threshold events support") Reported-by: Chris Lesiak <chris.lesiak(a)licorbio.com> Reviewed-by: Javier Carrasco <javier.carrasco.cruz(a)gmail.com> Signed-off-by: Dimitri Fedrau <dimitri.fedrau(a)liebherr.com> Cc: <Stable(a)vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron(a)huawei.com> --- drivers/iio/humidity/hdc3020.c | 69 ++++++++++++++++++++-------------- 1 file changed, 41 insertions(+), 28 deletions(-) diff --git a/drivers/iio/humidity/hdc3020.c b/drivers/iio/humidity/hdc3020.c index 8aa567d9aded..78b2c171c8da 100644 --- a/drivers/iio/humidity/hdc3020.c +++ b/drivers/iio/humidity/hdc3020.c @@ -72,6 +72,9 @@ #define HDC3020_MAX_TEMP_HYST_MICRO 164748607 #define HDC3020_MAX_HUM_MICRO 99220264 +/* Divide 65535 from the datasheet by 5 to avoid overflows */ +#define HDC3020_THRESH_FRACTION (65535 / 5) + struct hdc3020_data { struct i2c_client *client; struct gpio_desc *reset_gpio; @@ -376,15 +379,18 @@ static int hdc3020_thresh_get_temp(u16 thresh) int temp; /* - * Get the temperature threshold from 9 LSBs, shift them to get - * the truncated temperature threshold representation and - * calculate the threshold according to the formula in the - * datasheet. Result is degree celsius scaled by 65535. + * Get the temperature threshold from 9 LSBs, shift them to get the + * truncated temperature threshold representation and calculate the + * threshold according to the explicit formula in the datasheet: + * T(C) = -45 + (175 * temp) / 65535. + * Additionally scale by HDC3020_THRESH_FRACTION to avoid precision loss + * when calculating threshold and hysteresis values. Result is degree + * celsius scaled by HDC3020_THRESH_FRACTION. */ temp = FIELD_GET(HDC3020_THRESH_TEMP_MASK, thresh) << HDC3020_THRESH_TEMP_TRUNC_SHIFT; - return -2949075 + (175 * temp); + return -2949075 / 5 + (175 / 5 * temp); } static int hdc3020_thresh_get_hum(u16 thresh) @@ -394,13 +400,16 @@ static int hdc3020_thresh_get_hum(u16 thresh) /* * Get the humidity threshold from 7 MSBs, shift them to get the * truncated humidity threshold representation and calculate the - * threshold according to the formula in the datasheet. Result is - * percent scaled by 65535. + * threshold according to the explicit formula in the datasheet: + * RH(%) = 100 * hum / 65535. + * Additionally scale by HDC3020_THRESH_FRACTION to avoid precision loss + * when calculating threshold and hysteresis values. Result is percent + * scaled by HDC3020_THRESH_FRACTION. */ hum = FIELD_GET(HDC3020_THRESH_HUM_MASK, thresh) << HDC3020_THRESH_HUM_TRUNC_SHIFT; - return hum * 100; + return hum * 100 / 5; } static u16 hdc3020_thresh_set_temp(int s_temp, u16 curr_thresh) @@ -455,8 +464,8 @@ int hdc3020_thresh_clr(s64 s_thresh, s64 s_hyst, enum iio_event_direction dir) else s_clr = s_thresh + s_hyst; - /* Divide by 65535 to get units of micro */ - return div_s64(s_clr, 65535); + /* Divide by HDC3020_THRESH_FRACTION to get units of micro */ + return div_s64(s_clr, HDC3020_THRESH_FRACTION); } static int _hdc3020_write_thresh(struct hdc3020_data *data, u16 reg, u16 val) @@ -507,7 +516,7 @@ static int hdc3020_write_thresh(struct iio_dev *indio_dev, clr = ret; /* Scale value to include decimal part into calculations */ - s_val = (val < 0) ? (val * 1000000 - val2) : (val * 1000000 + val2); + s_val = (val < 0) ? (val * 1000 - val2) : (val * 1000 + val2); switch (chan->type) { case IIO_TEMP: switch (info) { @@ -523,7 +532,8 @@ static int hdc3020_write_thresh(struct iio_dev *indio_dev, /* Calculate old hysteresis */ s_thresh = (s64)hdc3020_thresh_get_temp(thresh) * 1000000; s_clr = (s64)hdc3020_thresh_get_temp(clr) * 1000000; - s_hyst = div_s64(abs(s_thresh - s_clr), 65535); + s_hyst = div_s64(abs(s_thresh - s_clr), + HDC3020_THRESH_FRACTION); /* Set new threshold */ thresh = reg_val; /* Set old hysteresis */ @@ -532,16 +542,17 @@ static int hdc3020_write_thresh(struct iio_dev *indio_dev, case IIO_EV_INFO_HYSTERESIS: /* * Function hdc3020_thresh_get_temp returns temperature - * in degree celsius scaled by 65535. Scale by 1000000 - * to be able to subtract scaled hysteresis value. + * in degree celsius scaled by HDC3020_THRESH_FRACTION. + * Scale by 1000000 to be able to subtract scaled + * hysteresis value. */ s_thresh = (s64)hdc3020_thresh_get_temp(thresh) * 1000000; /* * Units of s_val are in micro degree celsius, scale by - * 65535 to get same units as s_thresh. + * HDC3020_THRESH_FRACTION to get same units as s_thresh. */ s_val = min(abs(s_val), HDC3020_MAX_TEMP_HYST_MICRO); - s_hyst = (s64)s_val * 65535; + s_hyst = (s64)s_val * HDC3020_THRESH_FRACTION; s_clr = hdc3020_thresh_clr(s_thresh, s_hyst, dir); s_clr = max(s_clr, HDC3020_MIN_TEMP_MICRO); s_clr = min(s_clr, HDC3020_MAX_TEMP_MICRO); @@ -565,7 +576,8 @@ static int hdc3020_write_thresh(struct iio_dev *indio_dev, /* Calculate old hysteresis */ s_thresh = (s64)hdc3020_thresh_get_hum(thresh) * 1000000; s_clr = (s64)hdc3020_thresh_get_hum(clr) * 1000000; - s_hyst = div_s64(abs(s_thresh - s_clr), 65535); + s_hyst = div_s64(abs(s_thresh - s_clr), + HDC3020_THRESH_FRACTION); /* Set new threshold */ thresh = reg_val; /* Try to set old hysteresis */ @@ -574,15 +586,16 @@ static int hdc3020_write_thresh(struct iio_dev *indio_dev, case IIO_EV_INFO_HYSTERESIS: /* * Function hdc3020_thresh_get_hum returns relative - * humidity in percent scaled by 65535. Scale by 1000000 - * to be able to subtract scaled hysteresis value. + * humidity in percent scaled by HDC3020_THRESH_FRACTION. + * Scale by 1000000 to be able to subtract scaled + * hysteresis value. */ s_thresh = (s64)hdc3020_thresh_get_hum(thresh) * 1000000; /* - * Units of s_val are in micro percent, scale by 65535 - * to get same units as s_thresh. + * Units of s_val are in micro percent, scale by + * HDC3020_THRESH_FRACTION to get same units as s_thresh. */ - s_hyst = (s64)s_val * 65535; + s_hyst = (s64)s_val * HDC3020_THRESH_FRACTION; s_clr = hdc3020_thresh_clr(s_thresh, s_hyst, dir); s_clr = max(s_clr, 0); s_clr = min(s_clr, HDC3020_MAX_HUM_MICRO); @@ -630,7 +643,7 @@ static int hdc3020_read_thresh(struct iio_dev *indio_dev, thresh = hdc3020_thresh_get_temp(ret); switch (info) { case IIO_EV_INFO_VALUE: - *val = thresh; + *val = thresh * MILLI; break; case IIO_EV_INFO_HYSTERESIS: ret = hdc3020_read_be16(data, reg_clr); @@ -638,18 +651,18 @@ static int hdc3020_read_thresh(struct iio_dev *indio_dev, return ret; clr = hdc3020_thresh_get_temp(ret); - *val = abs(thresh - clr); + *val = abs(thresh - clr) * MILLI; break; default: return -EOPNOTSUPP; } - *val2 = 65535; + *val2 = HDC3020_THRESH_FRACTION; return IIO_VAL_FRACTIONAL; case IIO_HUMIDITYRELATIVE: thresh = hdc3020_thresh_get_hum(ret); switch (info) { case IIO_EV_INFO_VALUE: - *val = thresh; + *val = thresh * MILLI; break; case IIO_EV_INFO_HYSTERESIS: ret = hdc3020_read_be16(data, reg_clr); @@ -657,12 +670,12 @@ static int hdc3020_read_thresh(struct iio_dev *indio_dev, return ret; clr = hdc3020_thresh_get_hum(ret); - *val = abs(thresh - clr); + *val = abs(thresh - clr) * MILLI; break; default: return -EOPNOTSUPP; } - *val2 = 65535; + *val2 = HDC3020_THRESH_FRACTION; return IIO_VAL_FRACTIONAL; default: return -EOPNOTSUPP; -- 2.51.2

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patch "iio: adc: ad7124: fix temperature channel" added to char-misc-linus

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled iio: adc: ad7124: fix temperature channel to my char-misc git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git in the char-misc-linus branch. The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.) The patch will hopefully also be merged in Linus's tree for the next -rc kernel release. If you have any questions about this process, please let me know. From e2cc390a6629c76924a2740c54b144b9b28fca59 Mon Sep 17 00:00:00 2001 From: David Lechner <dlechner(a)baylibre.com> Date: Fri, 10 Oct 2025 15:24:31 -0500 Subject: iio: adc: ad7124: fix temperature channel MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Fix temperature channel not working due to gain and offset not being initialized. For channels other than the voltage ones calibration is skipped (which is OK). However that results in the calibration register values tracked in st->channels[i].cfg all being zero. These zeros are later written to hardware before a measurement is made which caused the raw temperature readings to be always 8388608 (0x800000). To fix it, we just make sure the gain and offset values are set to the default values and still return early without doing an internal calibration. While here, add a comment explaining why we don't bother calibrating the temperature channel. Fixes: 47036a03a303 ("iio: adc: ad7124: Implement internal calibration at probe time") Reviewed-by: Marcelo Schmitt <marcelo.schmitt(a)analog.com> Signed-off-by: David Lechner <dlechner(a)baylibre.com> Reviewed-by: Uwe Kleine-König <u.kleine-koenig(a)baylibre.com> Cc: <Stable(a)vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron(a)huawei.com> --- drivers/iio/adc/ad7124.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/drivers/iio/adc/ad7124.c b/drivers/iio/adc/ad7124.c index 910b40393f77..61623cc6cb25 100644 --- a/drivers/iio/adc/ad7124.c +++ b/drivers/iio/adc/ad7124.c @@ -1525,10 +1525,6 @@ static int __ad7124_calibrate_all(struct ad7124_state *st, struct iio_dev *indio int ret, i; for (i = 0; i < st->num_channels; i++) { - - if (indio_dev->channels[i].type != IIO_VOLTAGE) - continue; - /* * For calibration the OFFSET register should hold its reset default * value. For the GAIN register there is no such requirement but @@ -1538,6 +1534,14 @@ static int __ad7124_calibrate_all(struct ad7124_state *st, struct iio_dev *indio st->channels[i].cfg.calibration_offset = 0x800000; st->channels[i].cfg.calibration_gain = st->gain_default; + /* + * Only the main voltage input channels are important enough + * to be automatically calibrated here. For everything else, + * just use the default values set above. + */ + if (indio_dev->channels[i].type != IIO_VOLTAGE) + continue; + /* * Full-scale calibration isn't supported at gain 1, so skip in * that case. Note that untypically full-scale calibration has -- 2.51.2

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patch "iio: accel: fix ADXL355 startup race condition" added to char-misc-linus

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled iio: accel: fix ADXL355 startup race condition to my char-misc git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git in the char-misc-linus branch. The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.) The patch will hopefully also be merged in Linus's tree for the next -rc kernel release. If you have any questions about this process, please let me know. From c92c1bc408e9e11ae3c7011b062fdd74c09283a3 Mon Sep 17 00:00:00 2001 From: Valek Andrej <andrej.v(a)skyrain.eu> Date: Tue, 14 Oct 2025 09:13:44 +0200 Subject: iio: accel: fix ADXL355 startup race condition There is an race-condition where device is not full working after SW reset. Therefore it's necessary to wait some time after reset and verify shadow registers values by reading and comparing the values before/after reset. This mechanism is described in datasheet at least from revision D. Fixes: 12ed27863ea3 ("iio: accel: Add driver support for ADXL355") Signed-off-by: Valek Andrej <andrej.v(a)skyrain.eu> Signed-off-by: Kessler Markus <markus.kessler(a)hilti.com> Cc: <Stable(a)vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron(a)huawei.com> --- drivers/iio/accel/adxl355_core.c | 44 ++++++++++++++++++++++++++++---- 1 file changed, 39 insertions(+), 5 deletions(-) diff --git a/drivers/iio/accel/adxl355_core.c b/drivers/iio/accel/adxl355_core.c index 2e00fd51b4d5..5fc7f814b907 100644 --- a/drivers/iio/accel/adxl355_core.c +++ b/drivers/iio/accel/adxl355_core.c @@ -56,6 +56,8 @@ #define ADXL355_POWER_CTL_DRDY_MSK BIT(2) #define ADXL355_SELF_TEST_REG 0x2E #define ADXL355_RESET_REG 0x2F +#define ADXL355_BASE_ADDR_SHADOW_REG 0x50 +#define ADXL355_SHADOW_REG_COUNT 5 #define ADXL355_DEVID_AD_VAL 0xAD #define ADXL355_DEVID_MST_VAL 0x1D @@ -294,7 +296,12 @@ static void adxl355_fill_3db_frequency_table(struct adxl355_data *data) static int adxl355_setup(struct adxl355_data *data) { unsigned int regval; + int retries = 5; /* the number is chosen based on empirical reasons */ int ret; + u8 *shadow_regs __free(kfree) = kzalloc(ADXL355_SHADOW_REG_COUNT, GFP_KERNEL); + + if (!shadow_regs) + return -ENOMEM; ret = regmap_read(data->regmap, ADXL355_DEVID_AD_REG, &regval); if (ret) @@ -321,14 +328,41 @@ static int adxl355_setup(struct adxl355_data *data) if (regval != ADXL355_PARTID_VAL) dev_warn(data->dev, "Invalid DEV ID 0x%02x\n", regval); - /* - * Perform a software reset to make sure the device is in a consistent - * state after start-up. - */ - ret = regmap_write(data->regmap, ADXL355_RESET_REG, ADXL355_RESET_CODE); + /* Read shadow registers to be compared after reset */ + ret = regmap_bulk_read(data->regmap, + ADXL355_BASE_ADDR_SHADOW_REG, + shadow_regs, ADXL355_SHADOW_REG_COUNT); if (ret) return ret; + do { + if (--retries == 0) { + dev_err(data->dev, "Shadow registers mismatch\n"); + return -EIO; + } + + /* + * Perform a software reset to make sure the device is in a consistent + * state after start-up. + */ + ret = regmap_write(data->regmap, ADXL355_RESET_REG, + ADXL355_RESET_CODE); + if (ret) + return ret; + + /* Wait at least 5ms after software reset */ + usleep_range(5000, 10000); + + /* Read shadow registers for comparison */ + ret = regmap_bulk_read(data->regmap, + ADXL355_BASE_ADDR_SHADOW_REG, + data->buffer.buf, + ADXL355_SHADOW_REG_COUNT); + if (ret) + return ret; + } while (memcmp(shadow_regs, data->buffer.buf, + ADXL355_SHADOW_REG_COUNT)); + ret = regmap_update_bits(data->regmap, ADXL355_POWER_CTL_REG, ADXL355_POWER_CTL_DRDY_MSK, FIELD_PREP(ADXL355_POWER_CTL_DRDY_MSK, 1)); -- 2.51.2

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patch "iio: imu: st_lsm6dsx: fix array size for st_lsm6dsx_settings fields" added to char-misc-linus

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled iio: imu: st_lsm6dsx: fix array size for st_lsm6dsx_settings fields to my char-misc git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git in the char-misc-linus branch. The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.) The patch will hopefully also be merged in Linus's tree for the next -rc kernel release. If you have any questions about this process, please let me know. From 3af0c1fb1cdc351b64ff1a4bc06d491490c1f10a Mon Sep 17 00:00:00 2001 From: Francesco Lavra <flavra(a)baylibre.com> Date: Fri, 17 Oct 2025 19:32:08 +0200 Subject: iio: imu: st_lsm6dsx: fix array size for st_lsm6dsx_settings fields The `decimator` and `batch` fields of struct st_lsm6dsx_settings are arrays indexed by sensor type, not by sensor hardware identifier; moreover, the `batch` field is only used for the accelerometer and gyroscope. Change the array size for `decimator` from ST_LSM6DSX_MAX_ID to ST_LSM6DSX_ID_MAX, and change the array size for `batch` from ST_LSM6DSX_MAX_ID to 2; move the enum st_lsm6dsx_sensor_id definition so that the ST_LSM6DSX_ID_MAX value is usable within the struct st_lsm6dsx_settings definition. Fixes: 801a6e0af0c6c ("iio: imu: st_lsm6dsx: add support to LSM6DSO") Signed-off-by: Francesco Lavra <flavra(a)baylibre.com> Acked-by: Lorenzo Bianconi <lorenzo(a)kernel.org> Cc: <Stable(a)vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron(a)huawei.com> --- drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h | 22 +++++++++++----------- 1 file changed, 11 insertions(+), 11 deletions(-) diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h index c225b246c8a5..bca136392e99 100644 --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h @@ -252,6 +252,15 @@ struct st_lsm6dsx_event_settings { u8 wakeup_src_x_mask; }; +enum st_lsm6dsx_sensor_id { + ST_LSM6DSX_ID_GYRO, + ST_LSM6DSX_ID_ACC, + ST_LSM6DSX_ID_EXT0, + ST_LSM6DSX_ID_EXT1, + ST_LSM6DSX_ID_EXT2, + ST_LSM6DSX_ID_MAX +}; + enum st_lsm6dsx_ext_sensor_id { ST_LSM6DSX_ID_MAGN, }; @@ -337,23 +346,14 @@ struct st_lsm6dsx_settings { struct st_lsm6dsx_odr_table_entry odr_table[2]; struct st_lsm6dsx_samples_to_discard samples_to_discard[2]; struct st_lsm6dsx_fs_table_entry fs_table[2]; - struct st_lsm6dsx_reg decimator[ST_LSM6DSX_MAX_ID]; - struct st_lsm6dsx_reg batch[ST_LSM6DSX_MAX_ID]; + struct st_lsm6dsx_reg decimator[ST_LSM6DSX_ID_MAX]; + struct st_lsm6dsx_reg batch[2]; struct st_lsm6dsx_fifo_ops fifo_ops; struct st_lsm6dsx_hw_ts_settings ts_settings; struct st_lsm6dsx_shub_settings shub_settings; struct st_lsm6dsx_event_settings event_settings; }; -enum st_lsm6dsx_sensor_id { - ST_LSM6DSX_ID_GYRO, - ST_LSM6DSX_ID_ACC, - ST_LSM6DSX_ID_EXT0, - ST_LSM6DSX_ID_EXT1, - ST_LSM6DSX_ID_EXT2, - ST_LSM6DSX_ID_MAX, -}; - enum st_lsm6dsx_fifo_mode { ST_LSM6DSX_FIFO_BYPASS = 0x0, ST_LSM6DSX_FIFO_CONT = 0x6, -- 2.51.2

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patch "iio: adc: ad7280a: fix ad7280_store_balance_timer()" added to char-misc-linus

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled iio: adc: ad7280a: fix ad7280_store_balance_timer() to my char-misc git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git in the char-misc-linus branch. The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.) The patch will hopefully also be merged in Linus's tree for the next -rc kernel release. If you have any questions about this process, please let me know. From bd886cdcbf9e746f61c74035a3acd42e9108e115 Mon Sep 17 00:00:00 2001 From: David Lechner <dlechner(a)baylibre.com> Date: Fri, 10 Oct 2025 10:44:45 -0500 Subject: iio: adc: ad7280a: fix ad7280_store_balance_timer() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Use correct argument to iio_str_to_fixpoint() to parse 3 decimal places. iio_str_to_fixpoint() has a bit of an unintuitive API where the fract_mult parameter is the multiplier of the first decimal place as if it was already an integer. So to get 3 decimal places, fract_mult must be 100 rather than 1000. Fixes: 96ccdbc07a74 ("staging:iio:adc:ad7280a: Standardize extended ABI naming") Signed-off-by: David Lechner <dlechner(a)baylibre.com> Reviewed-by: Nuno Sá <nuno.sa(a)analog.com> Cc: <Stable(a)vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron(a)huawei.com> --- drivers/iio/adc/ad7280a.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/adc/ad7280a.c b/drivers/iio/adc/ad7280a.c index dda2986ccda0..50a6ff7c8b1c 100644 --- a/drivers/iio/adc/ad7280a.c +++ b/drivers/iio/adc/ad7280a.c @@ -541,7 +541,7 @@ static ssize_t ad7280_store_balance_timer(struct iio_dev *indio_dev, int val, val2; int ret; - ret = iio_str_to_fixpoint(buf, 1000, &val, &val2); + ret = iio_str_to_fixpoint(buf, 100, &val, &val2); if (ret) return ret; -- 2.51.2

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patch "iio:common:ssp_sensors: Fix an error handling path ssp_probe()" added to char-misc-linus

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled iio:common:ssp_sensors: Fix an error handling path ssp_probe() to my char-misc git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git in the char-misc-linus branch. The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.) The patch will hopefully also be merged in Linus's tree for the next -rc kernel release. If you have any questions about this process, please let me know. From 21553258b94861a73d7f2cf15469d69240e1170d Mon Sep 17 00:00:00 2001 From: Christophe JAILLET <christophe.jaillet(a)wanadoo.fr> Date: Fri, 10 Oct 2025 20:58:48 +0200 Subject: iio:common:ssp_sensors: Fix an error handling path ssp_probe() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit If an error occurs after a successful mfd_add_devices() call, it should be undone by a corresponding mfd_remove_devices() call, as already done in the remove function. Fixes: 50dd64d57eee ("iio: common: ssp_sensors: Add sensorhub driver") Signed-off-by: Christophe JAILLET <christophe.jaillet(a)wanadoo.fr> Reviewed-by: Nuno Sá <nuno.sa(a)analog.com> Cc: <Stable(a)vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron(a)huawei.com> --- drivers/iio/common/ssp_sensors/ssp_dev.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/iio/common/ssp_sensors/ssp_dev.c b/drivers/iio/common/ssp_sensors/ssp_dev.c index 1e167dc673ca..da09c9f3ceb6 100644 --- a/drivers/iio/common/ssp_sensors/ssp_dev.c +++ b/drivers/iio/common/ssp_sensors/ssp_dev.c @@ -503,7 +503,7 @@ static int ssp_probe(struct spi_device *spi) ret = spi_setup(spi); if (ret < 0) { dev_err(&spi->dev, "Failed to setup spi\n"); - return ret; + goto err_setup_spi; } data->fw_dl_state = SSP_FW_DL_STATE_NONE; @@ -568,6 +568,8 @@ static int ssp_probe(struct spi_device *spi) err_setup_irq: mutex_destroy(&data->pending_lock); mutex_destroy(&data->comm_lock); +err_setup_spi: + mfd_remove_devices(&spi->dev); dev_err(&spi->dev, "Probe failed!\n"); -- 2.51.2

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patch "iio: buffer-dmaengine: enable .get_dma_dev()" added to char-misc-linus

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled iio: buffer-dmaengine: enable .get_dma_dev() to my char-misc git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git in the char-misc-linus branch. The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.) The patch will hopefully also be merged in Linus's tree for the next -rc kernel release. If you have any questions about this process, please let me know. From 3db847df994d475db7812dde90376f2848bcd30a Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Nuno=20S=C3=A1?= <nuno.sa(a)analog.com> Date: Tue, 7 Oct 2025 10:15:23 +0100 Subject: iio: buffer-dmaengine: enable .get_dma_dev() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Wire up the .get_dma_dev() callback to use the DMA buffer infrastructure's implementation. This ensures that DMABUF operations use the correct DMA device for mapping, which is essential for proper operation on systems where memory is mapped above the 32-bit range. Without this callback, the core would fall back to using the IIO device's parent, which may not have the appropriate DMA mask configuration for high memory access. Fixes: 7a86d469983a ("iio: buffer-dmaengine: Support new DMABUF based userspace API") Reviewed-by: David Lechner <dlechner(a)baylibre.com> Signed-off-by: Nuno Sá <nuno.sa(a)analog.com> Cc: <Stable(a)vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron(a)huawei.com> --- drivers/iio/buffer/industrialio-buffer-dmaengine.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/iio/buffer/industrialio-buffer-dmaengine.c b/drivers/iio/buffer/industrialio-buffer-dmaengine.c index e9d9a7d39fe1..27dd56334345 100644 --- a/drivers/iio/buffer/industrialio-buffer-dmaengine.c +++ b/drivers/iio/buffer/industrialio-buffer-dmaengine.c @@ -177,6 +177,8 @@ static const struct iio_buffer_access_funcs iio_dmaengine_buffer_ops = { .lock_queue = iio_dma_buffer_lock_queue, .unlock_queue = iio_dma_buffer_unlock_queue, + .get_dma_dev = iio_dma_buffer_get_dma_dev, + .modes = INDIO_BUFFER_HARDWARE, .flags = INDIO_BUFFER_FLAG_FIXED_WATERMARK, }; -- 2.51.2

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patch "iio: pressure: bmp280: correct meas_time_us calculation" added to char-misc-linus

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled iio: pressure: bmp280: correct meas_time_us calculation to my char-misc git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git in the char-misc-linus branch. The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.) The patch will hopefully also be merged in Linus's tree for the next -rc kernel release. If you have any questions about this process, please let me know. From 0bf1bfde53b30da7fd7f4a6c3db5b8e77888958d Mon Sep 17 00:00:00 2001 From: Achim Gratz <Achim.Gratz(a)Stromeko.DE> Date: Sun, 28 Sep 2025 19:26:28 +0200 Subject: iio: pressure: bmp280: correct meas_time_us calculation Correction of meas_time_us initialization based on an observation and partial patch by David Lechner. The constant part of the measurement time (as described in the datasheet and implemented in the BM(P/E)2 Sensor API) was apparently forgotten (it was already correctly applied for the BMP380) and is now used. There was also another thinko in bmp280_wait_conv: data->oversampling_humid can actually have a value of 0 (for an oversampling_ratio of 1), so it can not be used to detect the presence of the humidity measurement capability. Use data->chip_info->oversampling_humid_avail instead, which is NULL for chips that cannot measure humidity and therefore must skip that part of the calculation. Closes: https://lore.kernel.org/linux-iio/875xgfg0wz.fsf@Gerda.invalid/ Fixes: 26ccfaa9ddaa ("iio: pressure: bmp280: Use sleep and forced mode for oneshot captures") Suggested-by: David Lechner <dlechner(a)baylibre.com> Tested-by: Achim Gratz <Achim.Gratz(a)Stromeko.DE> Signed-off-by: Achim Gratz <Achim.Gratz(a)Stromeko.DE> Cc: <Stable(a)vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron(a)huawei.com> --- drivers/iio/pressure/bmp280-core.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) diff --git a/drivers/iio/pressure/bmp280-core.c b/drivers/iio/pressure/bmp280-core.c index c04e8bb4c993..d983ce9c0b99 100644 --- a/drivers/iio/pressure/bmp280-core.c +++ b/drivers/iio/pressure/bmp280-core.c @@ -1040,13 +1040,16 @@ static int bmp280_wait_conv(struct bmp280_data *data) unsigned int reg, meas_time_us; int ret; - /* Check if we are using a BME280 device */ - if (data->oversampling_humid) - meas_time_us = BMP280_PRESS_HUMID_MEAS_OFFSET + - BIT(data->oversampling_humid) * BMP280_MEAS_DUR; + /* Constant part of the measurement time */ + meas_time_us = BMP280_MEAS_OFFSET; - else - meas_time_us = 0; + /* + * Check if we are using a BME280 device, + * Humidity measurement time + */ + if (data->chip_info->oversampling_humid_avail) + meas_time_us += BMP280_PRESS_HUMID_MEAS_OFFSET + + BIT(data->oversampling_humid) * BMP280_MEAS_DUR; /* Pressure measurement time */ meas_time_us += BMP280_PRESS_HUMID_MEAS_OFFSET + -- 2.51.2

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patch "iio: adc: stm32-dfsdm: fix st,adc-alt-channel property handling" added to char-misc-linus

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled iio: adc: stm32-dfsdm: fix st,adc-alt-channel property handling to my char-misc git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git in the char-misc-linus branch. The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.) The patch will hopefully also be merged in Linus's tree for the next -rc kernel release. If you have any questions about this process, please let me know. From 8a6b7989ff0cd0a95c93be1927f2af7ad10f28de Mon Sep 17 00:00:00 2001 From: Olivier Moysan <olivier.moysan(a)foss.st.com> Date: Thu, 2 Oct 2025 13:22:49 +0200 Subject: iio: adc: stm32-dfsdm: fix st,adc-alt-channel property handling MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Initially st,adc-alt-channel property was defined as an enum in the DFSDM binding. The DFSDM binding has been changed to use the new IIO backend framework, along with the adoption of IIO generic channels. In this new binding st,adc-alt-channel is defined as a boolean property, but it is still handled has an enum in DFSDM driver. Fix st,adc-alt-channel property handling in DFSDM driver. Fixes: 3208fa0cd919 ("iio: adc: stm32-dfsdm: adopt generic channels bindings") Signed-off-by: Olivier Moysan <olivier.moysan(a)foss.st.com> Reviewed-by: Nuno Sá <nuno.sa(a)analog.com> Cc: <Stable(a)vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron(a)huawei.com> --- drivers/iio/adc/stm32-dfsdm-adc.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/iio/adc/stm32-dfsdm-adc.c b/drivers/iio/adc/stm32-dfsdm-adc.c index 74b1b4dc6e81..9664b9bd75d4 100644 --- a/drivers/iio/adc/stm32-dfsdm-adc.c +++ b/drivers/iio/adc/stm32-dfsdm-adc.c @@ -725,9 +725,8 @@ static int stm32_dfsdm_generic_channel_parse_of(struct stm32_dfsdm *dfsdm, } df_ch->src = val; - ret = fwnode_property_read_u32(node, "st,adc-alt-channel", &df_ch->alt_si); - if (ret != -EINVAL) - df_ch->alt_si = 0; + if (fwnode_property_present(node, "st,adc-alt-channel")) + df_ch->alt_si = 1; if (adc->dev_data->type == DFSDM_IIO) { backend = devm_iio_backend_fwnode_get(&indio_dev->dev, NULL, node); -- 2.51.2

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patch "iio: adc: ad7380: fix SPI offload trigger rate" added to char-misc-linus

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled iio: adc: ad7380: fix SPI offload trigger rate to my char-misc git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git in the char-misc-linus branch. The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.) The patch will hopefully also be merged in Linus's tree for the next -rc kernel release. If you have any questions about this process, please let me know. From 632757312d7eb320b66ca60e0cfe098ec53cee08 Mon Sep 17 00:00:00 2001 From: David Lechner <dlechner(a)baylibre.com> Date: Fri, 19 Sep 2025 15:50:34 -0500 Subject: iio: adc: ad7380: fix SPI offload trigger rate Add a special case to double the SPI offload trigger rate when all channels of a single-ended chip are enabled in a buffered read. The single-ended chips in the AD738x family can only do simultaneous sampling of half their channels and have a multiplexer to allow reading the other half. To comply with the IIO definition of sampling_frequency, we need to trigger twice as often when the sequencer is enabled to so that both banks can be read in a single sample period. Fixes: bbeaec81a03e ("iio: ad7380: add support for SPI offload") Signed-off-by: David Lechner <dlechner(a)baylibre.com> Cc: <Stable(a)vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron(a)huawei.com> --- drivers/iio/adc/ad7380.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/iio/adc/ad7380.c b/drivers/iio/adc/ad7380.c index fa251dc1aae6..bfd908deefc0 100644 --- a/drivers/iio/adc/ad7380.c +++ b/drivers/iio/adc/ad7380.c @@ -1227,6 +1227,14 @@ static int ad7380_offload_buffer_postenable(struct iio_dev *indio_dev) if (ret) return ret; + /* + * When the sequencer is required to read all channels, we need to + * trigger twice per sample period in order to read one complete set + * of samples. + */ + if (st->seq) + config.periodic.frequency_hz *= 2; + ret = spi_offload_trigger_enable(st->offload, st->offload_trigger, &config); if (ret) spi_unoptimize_message(&st->offload_msg); -- 2.51.2

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