* [PATCH v9 1/3] iio: pressure: bmp280: Generalize read_*() functions
2024-06-28 17:17 [PATCH v9 0/3] iio: pressure: bmp280: Minor cleanup and triggered Vasileios Amoiridis
@ 2024-06-28 17:17 ` Vasileios Amoiridis
2024-07-14 22:16 ` Adam Rizkalla
2024-06-28 17:17 ` [PATCH v9 2/3] iio: pressure: bmp280: Add SCALE, RAW values in channels and refactorize them Vasileios Amoiridis
` (2 subsequent siblings)
3 siblings, 1 reply; 10+ messages in thread
From: Vasileios Amoiridis @ 2024-06-28 17:17 UTC (permalink / raw)
To: jic23, lars
Cc: petre.rodan, mazziesaccount, ak, vassilisamir, ang.iglesiasg,
linus.walleij, tgamblin, ajarizzo, phil, 579lpy,
andriy.shevchenko, semen.protsenko, linux-iio, linux-kernel
Add the coefficients for the IIO standard units and the IIO value
inside the chip_info structure.
Move the calculations for the IIO unit compatibility from inside the
read_{temp,press,humid}() functions and move them to the general
read_raw() function.
In this way, all the data for the calculation of the value are
located in the chip_info structure of the respective sensor.
Signed-off-by: Vasileios Amoiridis <vassilisamir@gmail.com>
---
drivers/iio/pressure/bmp280-core.c | 168 +++++++++++++++++------------
drivers/iio/pressure/bmp280.h | 13 ++-
2 files changed, 108 insertions(+), 73 deletions(-)
diff --git a/drivers/iio/pressure/bmp280-core.c b/drivers/iio/pressure/bmp280-core.c
index 49081b729618..9ff26a8e85d3 100644
--- a/drivers/iio/pressure/bmp280-core.c
+++ b/drivers/iio/pressure/bmp280-core.c
@@ -445,10 +445,8 @@ static u32 bmp280_compensate_press(struct bmp280_data *data,
return (u32)p;
}
-static int bmp280_read_temp(struct bmp280_data *data,
- int *val, int *val2)
+static int bmp280_read_temp(struct bmp280_data *data, s32 *comp_temp)
{
- s32 comp_temp;
u32 adc_temp;
int ret;
@@ -456,16 +454,15 @@ static int bmp280_read_temp(struct bmp280_data *data,
if (ret)
return ret;
- comp_temp = bmp280_compensate_temp(data, adc_temp);
+ *comp_temp = bmp280_compensate_temp(data, adc_temp);
- *val = comp_temp * 10;
- return IIO_VAL_INT;
+ return 0;
}
-static int bmp280_read_press(struct bmp280_data *data,
- int *val, int *val2)
+static int bmp280_read_press(struct bmp280_data *data, u32 *comp_press)
{
- u32 comp_press, adc_press, t_fine;
+ u32 adc_press;
+ s32 t_fine;
int ret;
ret = bmp280_get_t_fine(data, &t_fine);
@@ -476,17 +473,13 @@ static int bmp280_read_press(struct bmp280_data *data,
if (ret)
return ret;
- comp_press = bmp280_compensate_press(data, adc_press, t_fine);
-
- *val = comp_press;
- *val2 = 256000;
+ *comp_press = bmp280_compensate_press(data, adc_press, t_fine);
- return IIO_VAL_FRACTIONAL;
+ return 0;
}
-static int bme280_read_humid(struct bmp280_data *data, int *val, int *val2)
+static int bme280_read_humid(struct bmp280_data *data, u32 *comp_humidity)
{
- u32 comp_humidity;
u16 adc_humidity;
s32 t_fine;
int ret;
@@ -499,11 +492,9 @@ static int bme280_read_humid(struct bmp280_data *data, int *val, int *val2)
if (ret)
return ret;
- comp_humidity = bme280_compensate_humidity(data, adc_humidity, t_fine);
-
- *val = comp_humidity * 1000 / 1024;
+ *comp_humidity = bme280_compensate_humidity(data, adc_humidity, t_fine);
- return IIO_VAL_INT;
+ return 0;
}
static int bmp280_read_raw_impl(struct iio_dev *indio_dev,
@@ -511,6 +502,8 @@ static int bmp280_read_raw_impl(struct iio_dev *indio_dev,
int *val, int *val2, long mask)
{
struct bmp280_data *data = iio_priv(indio_dev);
+ int chan_value;
+ int ret;
guard(mutex)(&data->lock);
@@ -518,11 +511,29 @@ static int bmp280_read_raw_impl(struct iio_dev *indio_dev,
case IIO_CHAN_INFO_PROCESSED:
switch (chan->type) {
case IIO_HUMIDITYRELATIVE:
- return data->chip_info->read_humid(data, val, val2);
+ ret = data->chip_info->read_humid(data, &chan_value);
+ if (ret)
+ return ret;
+
+ *val = data->chip_info->humid_coeffs[0] * chan_value;
+ *val2 = data->chip_info->humid_coeffs[1];
+ return data->chip_info->humid_coeffs_type;
case IIO_PRESSURE:
- return data->chip_info->read_press(data, val, val2);
+ ret = data->chip_info->read_press(data, &chan_value);
+ if (ret)
+ return ret;
+
+ *val = data->chip_info->press_coeffs[0] * chan_value;
+ *val2 = data->chip_info->press_coeffs[1];
+ return data->chip_info->press_coeffs_type;
case IIO_TEMP:
- return data->chip_info->read_temp(data, val, val2);
+ ret = data->chip_info->read_temp(data, &chan_value);
+ if (ret)
+ return ret;
+
+ *val = data->chip_info->temp_coeffs[0] * chan_value;
+ *val2 = data->chip_info->temp_coeffs[1];
+ return data->chip_info->temp_coeffs_type;
default:
return -EINVAL;
}
@@ -822,6 +833,8 @@ static int bmp280_chip_config(struct bmp280_data *data)
static const int bmp280_oversampling_avail[] = { 1, 2, 4, 8, 16 };
static const u8 bmp280_chip_ids[] = { BMP280_CHIP_ID };
+static const int bmp280_temp_coeffs[] = { 10, 1 };
+static const int bmp280_press_coeffs[] = { 1, 256000 };
const struct bmp280_chip_info bmp280_chip_info = {
.id_reg = BMP280_REG_ID,
@@ -850,6 +863,11 @@ const struct bmp280_chip_info bmp280_chip_info = {
.num_oversampling_press_avail = ARRAY_SIZE(bmp280_oversampling_avail),
.oversampling_press_default = BMP280_OSRS_PRESS_16X - 1,
+ .temp_coeffs = bmp280_temp_coeffs,
+ .temp_coeffs_type = IIO_VAL_FRACTIONAL,
+ .press_coeffs = bmp280_press_coeffs,
+ .press_coeffs_type = IIO_VAL_FRACTIONAL,
+
.chip_config = bmp280_chip_config,
.read_temp = bmp280_read_temp,
.read_press = bmp280_read_press,
@@ -877,6 +895,7 @@ static int bme280_chip_config(struct bmp280_data *data)
}
static const u8 bme280_chip_ids[] = { BME280_CHIP_ID };
+static const int bme280_humid_coeffs[] = { 1000, 1024 };
const struct bmp280_chip_info bme280_chip_info = {
.id_reg = BMP280_REG_ID,
@@ -899,6 +918,13 @@ const struct bmp280_chip_info bme280_chip_info = {
.num_oversampling_humid_avail = ARRAY_SIZE(bmp280_oversampling_avail),
.oversampling_humid_default = BME280_OSRS_HUMIDITY_16X - 1,
+ .temp_coeffs = bmp280_temp_coeffs,
+ .temp_coeffs_type = IIO_VAL_FRACTIONAL,
+ .press_coeffs = bmp280_press_coeffs,
+ .press_coeffs_type = IIO_VAL_FRACTIONAL,
+ .humid_coeffs = bme280_humid_coeffs,
+ .humid_coeffs_type = IIO_VAL_FRACTIONAL,
+
.chip_config = bme280_chip_config,
.read_temp = bmp280_read_temp,
.read_press = bmp280_read_press,
@@ -1091,9 +1117,8 @@ static u32 bmp380_compensate_press(struct bmp280_data *data,
return comp_press;
}
-static int bmp380_read_temp(struct bmp280_data *data, int *val, int *val2)
+static int bmp380_read_temp(struct bmp280_data *data, s32 *comp_temp)
{
- s32 comp_temp;
u32 adc_temp;
int ret;
@@ -1101,15 +1126,14 @@ static int bmp380_read_temp(struct bmp280_data *data, int *val, int *val2)
if (ret)
return ret;
- comp_temp = bmp380_compensate_temp(data, adc_temp);
+ *comp_temp = bmp380_compensate_temp(data, adc_temp);
- *val = comp_temp * 10;
- return IIO_VAL_INT;
+ return 0;
}
-static int bmp380_read_press(struct bmp280_data *data, int *val, int *val2)
+static int bmp380_read_press(struct bmp280_data *data, u32 *comp_press)
{
- u32 adc_press, comp_press, t_fine;
+ u32 adc_press, t_fine;
int ret;
ret = bmp380_get_t_fine(data, &t_fine);
@@ -1120,12 +1144,9 @@ static int bmp380_read_press(struct bmp280_data *data, int *val, int *val2)
if (ret)
return ret;
- comp_press = bmp380_compensate_press(data, adc_press, t_fine);
-
- *val = comp_press;
- *val2 = 100000;
+ *comp_press = bmp380_compensate_press(data, adc_press, t_fine);
- return IIO_VAL_FRACTIONAL;
+ return 0;
}
static int bmp380_read_calib(struct bmp280_data *data)
@@ -1296,6 +1317,8 @@ static int bmp380_chip_config(struct bmp280_data *data)
static const int bmp380_oversampling_avail[] = { 1, 2, 4, 8, 16, 32 };
static const int bmp380_iir_filter_coeffs_avail[] = { 1, 2, 4, 8, 16, 32, 64, 128};
static const u8 bmp380_chip_ids[] = { BMP380_CHIP_ID, BMP390_CHIP_ID };
+static const int bmp380_temp_coeffs[] = { 10, 1 };
+static const int bmp380_press_coeffs[] = { 1, 100000 };
const struct bmp280_chip_info bmp380_chip_info = {
.id_reg = BMP380_REG_ID,
@@ -1323,6 +1346,11 @@ const struct bmp280_chip_info bmp380_chip_info = {
.num_iir_filter_coeffs_avail = ARRAY_SIZE(bmp380_iir_filter_coeffs_avail),
.iir_filter_coeff_default = 2,
+ .temp_coeffs = bmp380_temp_coeffs,
+ .temp_coeffs_type = IIO_VAL_FRACTIONAL,
+ .press_coeffs = bmp380_press_coeffs,
+ .press_coeffs_type = IIO_VAL_FRACTIONAL,
+
.chip_config = bmp380_chip_config,
.read_temp = bmp380_read_temp,
.read_press = bmp380_read_press,
@@ -1443,9 +1471,9 @@ static int bmp580_nvm_operation(struct bmp280_data *data, bool is_write)
* for what is expected on IIO ABI.
*/
-static int bmp580_read_temp(struct bmp280_data *data, int *val, int *val2)
+static int bmp580_read_temp(struct bmp280_data *data, s32 *raw_temp)
{
- s32 raw_temp;
+ s32 value_temp;
int ret;
ret = regmap_bulk_read(data->regmap, BMP580_REG_TEMP_XLSB, data->buf,
@@ -1455,25 +1483,19 @@ static int bmp580_read_temp(struct bmp280_data *data, int *val, int *val2)
return ret;
}
- raw_temp = get_unaligned_le24(data->buf);
- if (raw_temp == BMP580_TEMP_SKIPPED) {
+ value_temp = get_unaligned_le24(data->buf);
+ if (value_temp == BMP580_TEMP_SKIPPED) {
dev_err(data->dev, "reading temperature skipped\n");
return -EIO;
}
+ *raw_temp = sign_extend32(value_temp, 23);
- /*
- * Temperature is returned in Celsius degrees in fractional
- * form down 2^16. We rescale by x1000 to return millidegrees
- * Celsius to respect IIO ABI.
- */
- raw_temp = sign_extend32(raw_temp, 23);
- *val = ((s64)raw_temp * 1000) / (1 << 16);
- return IIO_VAL_INT;
+ return 0;
}
-static int bmp580_read_press(struct bmp280_data *data, int *val, int *val2)
+static int bmp580_read_press(struct bmp280_data *data, u32 *raw_press)
{
- u32 raw_press;
+ u32 value_press;
int ret;
ret = regmap_bulk_read(data->regmap, BMP580_REG_PRESS_XLSB, data->buf,
@@ -1483,18 +1505,14 @@ static int bmp580_read_press(struct bmp280_data *data, int *val, int *val2)
return ret;
}
- raw_press = get_unaligned_le24(data->buf);
- if (raw_press == BMP580_PRESS_SKIPPED) {
+ value_press = get_unaligned_le24(data->buf);
+ if (value_press == BMP580_PRESS_SKIPPED) {
dev_err(data->dev, "reading pressure skipped\n");
return -EIO;
}
- /*
- * Pressure is returned in Pascals in fractional form down 2^16.
- * We rescale /1000 to convert to kilopascal to respect IIO ABI.
- */
- *val = raw_press;
- *val2 = 64000; /* 2^6 * 1000 */
- return IIO_VAL_FRACTIONAL;
+ *raw_press = value_press;
+
+ return 0;
}
static const int bmp580_odr_table[][2] = {
@@ -1830,6 +1848,9 @@ static int bmp580_chip_config(struct bmp280_data *data)
static const int bmp580_oversampling_avail[] = { 1, 2, 4, 8, 16, 32, 64, 128 };
static const u8 bmp580_chip_ids[] = { BMP580_CHIP_ID, BMP580_CHIP_ID_ALT };
+/* Instead of { 1000, 16 } we do this, to avoid overflow issues */
+static const int bmp580_temp_coeffs[] = { 125, 13 };
+static const int bmp580_press_coeffs[] = { 1, 64000};
const struct bmp280_chip_info bmp580_chip_info = {
.id_reg = BMP580_REG_CHIP_ID,
@@ -1856,6 +1877,11 @@ const struct bmp280_chip_info bmp580_chip_info = {
.num_iir_filter_coeffs_avail = ARRAY_SIZE(bmp380_iir_filter_coeffs_avail),
.iir_filter_coeff_default = 2,
+ .temp_coeffs = bmp580_temp_coeffs,
+ .temp_coeffs_type = IIO_VAL_FRACTIONAL_LOG2,
+ .press_coeffs = bmp580_press_coeffs,
+ .press_coeffs_type = IIO_VAL_FRACTIONAL,
+
.chip_config = bmp580_chip_config,
.read_temp = bmp580_read_temp,
.read_press = bmp580_read_press,
@@ -2011,9 +2037,8 @@ static s32 bmp180_compensate_temp(struct bmp280_data *data, u32 adc_temp)
return (bmp180_calc_t_fine(data, adc_temp) + 8) / 16;
}
-static int bmp180_read_temp(struct bmp280_data *data, int *val, int *val2)
+static int bmp180_read_temp(struct bmp280_data *data, s32 *comp_temp)
{
- s32 comp_temp;
u32 adc_temp;
int ret;
@@ -2021,10 +2046,9 @@ static int bmp180_read_temp(struct bmp280_data *data, int *val, int *val2)
if (ret)
return ret;
- comp_temp = bmp180_compensate_temp(data, adc_temp);
+ *comp_temp = bmp180_compensate_temp(data, adc_temp);
- *val = comp_temp * 100;
- return IIO_VAL_INT;
+ return 0;
}
static int bmp180_read_press_adc(struct bmp280_data *data, u32 *adc_press)
@@ -2087,9 +2111,9 @@ static u32 bmp180_compensate_press(struct bmp280_data *data, u32 adc_press,
return p + ((x1 + x2 + 3791) >> 4);
}
-static int bmp180_read_press(struct bmp280_data *data, int *val, int *val2)
+static int bmp180_read_press(struct bmp280_data *data, u32 *comp_press)
{
- u32 comp_press, adc_press;
+ u32 adc_press;
s32 t_fine;
int ret;
@@ -2101,12 +2125,9 @@ static int bmp180_read_press(struct bmp280_data *data, int *val, int *val2)
if (ret)
return ret;
- comp_press = bmp180_compensate_press(data, adc_press, t_fine);
-
- *val = comp_press;
- *val2 = 1000;
+ *comp_press = bmp180_compensate_press(data, adc_press, t_fine);
- return IIO_VAL_FRACTIONAL;
+ return 0;
}
static int bmp180_chip_config(struct bmp280_data *data)
@@ -2117,6 +2138,8 @@ static int bmp180_chip_config(struct bmp280_data *data)
static const int bmp180_oversampling_temp_avail[] = { 1 };
static const int bmp180_oversampling_press_avail[] = { 1, 2, 4, 8 };
static const u8 bmp180_chip_ids[] = { BMP180_CHIP_ID };
+static const int bmp180_temp_coeffs[] = { 100, 1 };
+static const int bmp180_press_coeffs[] = { 1, 1000 };
const struct bmp280_chip_info bmp180_chip_info = {
.id_reg = BMP280_REG_ID,
@@ -2137,6 +2160,11 @@ const struct bmp280_chip_info bmp180_chip_info = {
ARRAY_SIZE(bmp180_oversampling_press_avail),
.oversampling_press_default = BMP180_MEAS_PRESS_8X,
+ .temp_coeffs = bmp180_temp_coeffs,
+ .temp_coeffs_type = IIO_VAL_FRACTIONAL,
+ .press_coeffs = bmp180_press_coeffs,
+ .press_coeffs_type = IIO_VAL_FRACTIONAL,
+
.chip_config = bmp180_chip_config,
.read_temp = bmp180_read_temp,
.read_press = bmp180_read_press,
diff --git a/drivers/iio/pressure/bmp280.h b/drivers/iio/pressure/bmp280.h
index 7c30e4d523be..a3d2cd722760 100644
--- a/drivers/iio/pressure/bmp280.h
+++ b/drivers/iio/pressure/bmp280.h
@@ -446,10 +446,17 @@ struct bmp280_chip_info {
int num_sampling_freq_avail;
int sampling_freq_default;
+ const int *temp_coeffs;
+ const int temp_coeffs_type;
+ const int *press_coeffs;
+ const int press_coeffs_type;
+ const int *humid_coeffs;
+ const int humid_coeffs_type;
+
int (*chip_config)(struct bmp280_data *data);
- int (*read_temp)(struct bmp280_data *data, int *val, int *val2);
- int (*read_press)(struct bmp280_data *data, int *val, int *val2);
- int (*read_humid)(struct bmp280_data *data, int *val, int *val2);
+ int (*read_temp)(struct bmp280_data *data, s32 *adc_temp);
+ int (*read_press)(struct bmp280_data *data, u32 *adc_press);
+ int (*read_humid)(struct bmp280_data *data, u32 *adc_humidity);
int (*read_calib)(struct bmp280_data *data);
int (*preinit)(struct bmp280_data *data);
};
--
2.25.1
^ permalink raw reply related [flat|nested] 10+ messages in thread* [PATCH v9 2/3] iio: pressure: bmp280: Add SCALE, RAW values in channels and refactorize them
2024-06-28 17:17 [PATCH v9 0/3] iio: pressure: bmp280: Minor cleanup and triggered Vasileios Amoiridis
2024-06-28 17:17 ` [PATCH v9 1/3] iio: pressure: bmp280: Generalize read_*() functions Vasileios Amoiridis
@ 2024-06-28 17:17 ` Vasileios Amoiridis
2024-06-28 17:17 ` [PATCH v9 3/3] iio: pressure: bmp280: Add triggered buffer support Vasileios Amoiridis
2024-06-30 10:23 ` [PATCH v9 0/3] iio: pressure: bmp280: Minor cleanup and triggered Jonathan Cameron
3 siblings, 0 replies; 10+ messages in thread
From: Vasileios Amoiridis @ 2024-06-28 17:17 UTC (permalink / raw)
To: jic23, lars
Cc: petre.rodan, mazziesaccount, ak, vassilisamir, ang.iglesiasg,
linus.walleij, tgamblin, ajarizzo, phil, 579lpy,
andriy.shevchenko, semen.protsenko, linux-iio, linux-kernel
Add extra IIO_CHAN_INFO_SCALE and IIO_CHAN_INFO_RAW channels in order
to be able to calculate the processed value with standard userspace
IIO tools. Can be used for triggered buffers as well.
Even though it is not a good design choice to have SCALE, RAW and
PROCESSED together, the PROCESSED channel is kept for ABI compatibility.
While at it, separate BMPxxx and BMExxx device channels since BME
supports also humidity measurements.
Signed-off-by: Vasileios Amoiridis <vassilisamir@gmail.com>
Link: https://lore.kernel.org/r/20240512230524.53990-5-vassilisamir@gmail.com
---
drivers/iio/pressure/bmp280-core.c | 96 ++++++++++++++++++++++++++----
1 file changed, 83 insertions(+), 13 deletions(-)
diff --git a/drivers/iio/pressure/bmp280-core.c b/drivers/iio/pressure/bmp280-core.c
index 9ff26a8e85d3..f709ad8a54e1 100644
--- a/drivers/iio/pressure/bmp280-core.c
+++ b/drivers/iio/pressure/bmp280-core.c
@@ -137,17 +137,45 @@ enum {
static const struct iio_chan_spec bmp280_channels[] = {
{
.type = IIO_PRESSURE,
+ /* PROCESSED maintained for ABI backwards compatibility */
.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
+ BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE) |
BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO),
},
{
.type = IIO_TEMP,
+ /* PROCESSED maintained for ABI backwards compatibility */
.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
+ BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO),
+ },
+};
+
+static const struct iio_chan_spec bme280_channels[] = {
+ {
+ .type = IIO_PRESSURE,
+ /* PROCESSED maintained for ABI backwards compatibility */
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
+ BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO),
+ },
+ {
+ .type = IIO_TEMP,
+ /* PROCESSED maintained for ABI backwards compatibility */
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
+ BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE) |
BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO),
},
{
.type = IIO_HUMIDITYRELATIVE,
+ /* PROCESSED maintained for ABI backwards compatibility */
.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
+ BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE) |
BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO),
},
};
@@ -155,21 +183,20 @@ static const struct iio_chan_spec bmp280_channels[] = {
static const struct iio_chan_spec bmp380_channels[] = {
{
.type = IIO_PRESSURE,
+ /* PROCESSED maintained for ABI backwards compatibility */
.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
+ BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE) |
BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO),
.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ) |
BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY),
},
{
.type = IIO_TEMP,
+ /* PROCESSED maintained for ABI backwards compatibility */
.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
- BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO),
- .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ) |
- BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY),
- },
- {
- .type = IIO_HUMIDITYRELATIVE,
- .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
+ BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE) |
BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO),
.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ) |
BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY),
@@ -537,6 +564,49 @@ static int bmp280_read_raw_impl(struct iio_dev *indio_dev,
default:
return -EINVAL;
}
+ case IIO_CHAN_INFO_RAW:
+ switch (chan->type) {
+ case IIO_HUMIDITYRELATIVE:
+ ret = data->chip_info->read_humid(data, &chan_value);
+ if (ret)
+ return ret;
+
+ *val = chan_value;
+ return IIO_VAL_INT;
+ case IIO_PRESSURE:
+ ret = data->chip_info->read_press(data, &chan_value);
+ if (ret)
+ return ret;
+
+ *val = chan_value;
+ return IIO_VAL_INT;
+ case IIO_TEMP:
+ ret = data->chip_info->read_temp(data, &chan_value);
+ if (ret)
+ return ret;
+
+ *val = chan_value;
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->type) {
+ case IIO_HUMIDITYRELATIVE:
+ *val = data->chip_info->humid_coeffs[0];
+ *val2 = data->chip_info->humid_coeffs[1];
+ return data->chip_info->humid_coeffs_type;
+ case IIO_PRESSURE:
+ *val = data->chip_info->press_coeffs[0];
+ *val2 = data->chip_info->press_coeffs[1];
+ return data->chip_info->press_coeffs_type;
+ case IIO_TEMP:
+ *val = data->chip_info->temp_coeffs[0];
+ *val2 = data->chip_info->temp_coeffs[1];
+ return data->chip_info->temp_coeffs_type;
+ default:
+ return -EINVAL;
+ }
case IIO_CHAN_INFO_OVERSAMPLING_RATIO:
switch (chan->type) {
case IIO_HUMIDITYRELATIVE:
@@ -843,7 +913,7 @@ const struct bmp280_chip_info bmp280_chip_info = {
.regmap_config = &bmp280_regmap_config,
.start_up_time = 2000,
.channels = bmp280_channels,
- .num_channels = 2,
+ .num_channels = ARRAY_SIZE(bmp280_channels),
.oversampling_temp_avail = bmp280_oversampling_avail,
.num_oversampling_temp_avail = ARRAY_SIZE(bmp280_oversampling_avail),
@@ -903,8 +973,8 @@ const struct bmp280_chip_info bme280_chip_info = {
.num_chip_id = ARRAY_SIZE(bme280_chip_ids),
.regmap_config = &bmp280_regmap_config,
.start_up_time = 2000,
- .channels = bmp280_channels,
- .num_channels = 3,
+ .channels = bme280_channels,
+ .num_channels = ARRAY_SIZE(bme280_channels),
.oversampling_temp_avail = bmp280_oversampling_avail,
.num_oversampling_temp_avail = ARRAY_SIZE(bmp280_oversampling_avail),
@@ -1328,7 +1398,7 @@ const struct bmp280_chip_info bmp380_chip_info = {
.spi_read_extra_byte = true,
.start_up_time = 2000,
.channels = bmp380_channels,
- .num_channels = 2,
+ .num_channels = ARRAY_SIZE(bmp380_channels),
.oversampling_temp_avail = bmp380_oversampling_avail,
.num_oversampling_temp_avail = ARRAY_SIZE(bmp380_oversampling_avail),
@@ -1859,7 +1929,7 @@ const struct bmp280_chip_info bmp580_chip_info = {
.regmap_config = &bmp580_regmap_config,
.start_up_time = 2000,
.channels = bmp380_channels,
- .num_channels = 2,
+ .num_channels = ARRAY_SIZE(bmp380_channels),
.oversampling_temp_avail = bmp580_oversampling_avail,
.num_oversampling_temp_avail = ARRAY_SIZE(bmp580_oversampling_avail),
@@ -2148,7 +2218,7 @@ const struct bmp280_chip_info bmp180_chip_info = {
.regmap_config = &bmp180_regmap_config,
.start_up_time = 2000,
.channels = bmp280_channels,
- .num_channels = 2,
+ .num_channels = ARRAY_SIZE(bmp280_channels),
.oversampling_temp_avail = bmp180_oversampling_temp_avail,
.num_oversampling_temp_avail =
--
2.25.1
^ permalink raw reply related [flat|nested] 10+ messages in thread* [PATCH v9 3/3] iio: pressure: bmp280: Add triggered buffer support
2024-06-28 17:17 [PATCH v9 0/3] iio: pressure: bmp280: Minor cleanup and triggered Vasileios Amoiridis
2024-06-28 17:17 ` [PATCH v9 1/3] iio: pressure: bmp280: Generalize read_*() functions Vasileios Amoiridis
2024-06-28 17:17 ` [PATCH v9 2/3] iio: pressure: bmp280: Add SCALE, RAW values in channels and refactorize them Vasileios Amoiridis
@ 2024-06-28 17:17 ` Vasileios Amoiridis
2024-06-30 10:23 ` [PATCH v9 0/3] iio: pressure: bmp280: Minor cleanup and triggered Jonathan Cameron
3 siblings, 0 replies; 10+ messages in thread
From: Vasileios Amoiridis @ 2024-06-28 17:17 UTC (permalink / raw)
To: jic23, lars
Cc: petre.rodan, mazziesaccount, ak, vassilisamir, ang.iglesiasg,
linus.walleij, tgamblin, ajarizzo, phil, 579lpy,
andriy.shevchenko, semen.protsenko, linux-iio, linux-kernel
BMP2xx, BME280, BMP3xx, and BMP5xx use continuous buffers for their
temperature, pressure and humidity readings. This facilitates the
use of burst/bulk reads in order to acquire data faster. The
approach is different from the one used in oneshot captures.
BMP085 & BMP1xx devices use a completely different measurement
process that is well defined and is used in their buffer_handler().
Suggested-by: Angel Iglesias <ang.iglesiasg@gmail.com>
Signed-off-by: Vasileios Amoiridis <vassilisamir@gmail.com>
Link: https://lore.kernel.org/r/20240512230524.53990-6-vassilisamir@gmail.com
---
drivers/iio/pressure/Kconfig | 2 +
drivers/iio/pressure/bmp280-core.c | 393 ++++++++++++++++++++++++++++-
drivers/iio/pressure/bmp280-spi.c | 8 +-
drivers/iio/pressure/bmp280.h | 21 +-
4 files changed, 405 insertions(+), 19 deletions(-)
diff --git a/drivers/iio/pressure/Kconfig b/drivers/iio/pressure/Kconfig
index 3ad38506028e..0b5406a3f85d 100644
--- a/drivers/iio/pressure/Kconfig
+++ b/drivers/iio/pressure/Kconfig
@@ -31,6 +31,8 @@ config BMP280
select REGMAP
select BMP280_I2C if (I2C)
select BMP280_SPI if (SPI_MASTER)
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
help
Say yes here to build support for Bosch Sensortec BMP180, BMP280, BMP380
and BMP580 pressure and temperature sensors. Also supports the BME280 with
diff --git a/drivers/iio/pressure/bmp280-core.c b/drivers/iio/pressure/bmp280-core.c
index f709ad8a54e1..2fc5724196e3 100644
--- a/drivers/iio/pressure/bmp280-core.c
+++ b/drivers/iio/pressure/bmp280-core.c
@@ -41,7 +41,10 @@
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
+#include <linux/iio/buffer.h>
#include <linux/iio/iio.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
#include <asm/unaligned.h>
@@ -134,6 +137,12 @@ enum {
BMP380_P11 = 20,
};
+enum bmp280_scan {
+ BMP280_PRESS,
+ BMP280_TEMP,
+ BME280_HUMID,
+};
+
static const struct iio_chan_spec bmp280_channels[] = {
{
.type = IIO_PRESSURE,
@@ -142,6 +151,13 @@ static const struct iio_chan_spec bmp280_channels[] = {
BIT(IIO_CHAN_INFO_RAW) |
BIT(IIO_CHAN_INFO_SCALE) |
BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO),
+ .scan_index = 0,
+ .scan_type = {
+ .sign = 'u',
+ .realbits = 32,
+ .storagebits = 32,
+ .endianness = IIO_CPU,
+ },
},
{
.type = IIO_TEMP,
@@ -150,7 +166,15 @@ static const struct iio_chan_spec bmp280_channels[] = {
BIT(IIO_CHAN_INFO_RAW) |
BIT(IIO_CHAN_INFO_SCALE) |
BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO),
+ .scan_index = 1,
+ .scan_type = {
+ .sign = 's',
+ .realbits = 32,
+ .storagebits = 32,
+ .endianness = IIO_CPU,
+ },
},
+ IIO_CHAN_SOFT_TIMESTAMP(2),
};
static const struct iio_chan_spec bme280_channels[] = {
@@ -161,6 +185,13 @@ static const struct iio_chan_spec bme280_channels[] = {
BIT(IIO_CHAN_INFO_RAW) |
BIT(IIO_CHAN_INFO_SCALE) |
BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO),
+ .scan_index = 0,
+ .scan_type = {
+ .sign = 'u',
+ .realbits = 32,
+ .storagebits = 32,
+ .endianness = IIO_CPU,
+ },
},
{
.type = IIO_TEMP,
@@ -169,6 +200,13 @@ static const struct iio_chan_spec bme280_channels[] = {
BIT(IIO_CHAN_INFO_RAW) |
BIT(IIO_CHAN_INFO_SCALE) |
BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO),
+ .scan_index = 1,
+ .scan_type = {
+ .sign = 's',
+ .realbits = 32,
+ .storagebits = 32,
+ .endianness = IIO_CPU,
+ },
},
{
.type = IIO_HUMIDITYRELATIVE,
@@ -177,7 +215,15 @@ static const struct iio_chan_spec bme280_channels[] = {
BIT(IIO_CHAN_INFO_RAW) |
BIT(IIO_CHAN_INFO_SCALE) |
BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO),
+ .scan_index = 2,
+ .scan_type = {
+ .sign = 'u',
+ .realbits = 32,
+ .storagebits = 32,
+ .endianness = IIO_CPU,
+ },
},
+ IIO_CHAN_SOFT_TIMESTAMP(3),
};
static const struct iio_chan_spec bmp380_channels[] = {
@@ -190,6 +236,51 @@ static const struct iio_chan_spec bmp380_channels[] = {
BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO),
.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ) |
BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY),
+ .scan_index = 0,
+ .scan_type = {
+ .sign = 'u',
+ .realbits = 32,
+ .storagebits = 32,
+ .endianness = IIO_CPU,
+ },
+ },
+ {
+ .type = IIO_TEMP,
+ /* PROCESSED maintained for ABI backwards compatibility */
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
+ BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO),
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ) |
+ BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY),
+ .scan_index = 1,
+ .scan_type = {
+ .sign = 's',
+ .realbits = 32,
+ .storagebits = 32,
+ .endianness = IIO_CPU,
+ },
+ },
+ IIO_CHAN_SOFT_TIMESTAMP(2),
+};
+
+static const struct iio_chan_spec bmp580_channels[] = {
+ {
+ .type = IIO_PRESSURE,
+ /* PROCESSED maintained for ABI backwards compatibility */
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
+ BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO),
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ) |
+ BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY),
+ .scan_index = 0,
+ .scan_type = {
+ .sign = 'u',
+ .realbits = 24,
+ .storagebits = 32,
+ .endianness = IIO_LE,
+ },
},
{
.type = IIO_TEMP,
@@ -200,7 +291,15 @@ static const struct iio_chan_spec bmp380_channels[] = {
BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO),
.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ) |
BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY),
+ .scan_index = 1,
+ .scan_type = {
+ .sign = 's',
+ .realbits = 24,
+ .storagebits = 32,
+ .endianness = IIO_LE,
+ },
},
+ IIO_CHAN_SOFT_TIMESTAMP(2),
};
static int bmp280_read_calib(struct bmp280_data *data)
@@ -316,7 +415,7 @@ static int bme280_read_humid_adc(struct bmp280_data *data, u16 *adc_humidity)
int ret;
ret = regmap_bulk_read(data->regmap, BME280_REG_HUMIDITY_MSB,
- &data->be16, sizeof(data->be16));
+ &data->be16, BME280_NUM_HUMIDITY_BYTES);
if (ret) {
dev_err(data->dev, "failed to read humidity\n");
return ret;
@@ -362,7 +461,7 @@ static int bmp280_read_temp_adc(struct bmp280_data *data, u32 *adc_temp)
int ret;
ret = regmap_bulk_read(data->regmap, BMP280_REG_TEMP_MSB,
- data->buf, sizeof(data->buf));
+ data->buf, BMP280_NUM_TEMP_BYTES);
if (ret) {
dev_err(data->dev, "failed to read temperature\n");
return ret;
@@ -423,7 +522,7 @@ static int bmp280_read_press_adc(struct bmp280_data *data, u32 *adc_press)
int ret;
ret = regmap_bulk_read(data->regmap, BMP280_REG_PRESS_MSB,
- data->buf, sizeof(data->buf));
+ data->buf, BMP280_NUM_PRESS_BYTES);
if (ret) {
dev_err(data->dev, "failed to read pressure\n");
return ret;
@@ -874,6 +973,16 @@ static const struct iio_info bmp280_info = {
.write_raw = &bmp280_write_raw,
};
+static const unsigned long bmp280_avail_scan_masks[] = {
+ BIT(BMP280_TEMP) | BIT(BMP280_PRESS),
+ 0
+};
+
+static const unsigned long bme280_avail_scan_masks[] = {
+ BIT(BME280_HUMID) | BIT(BMP280_TEMP) | BIT(BMP280_PRESS),
+ 0
+};
+
static int bmp280_chip_config(struct bmp280_data *data)
{
u8 osrs = FIELD_PREP(BMP280_OSRS_TEMP_MASK, data->oversampling_temp + 1) |
@@ -901,6 +1010,53 @@ static int bmp280_chip_config(struct bmp280_data *data)
return ret;
}
+static irqreturn_t bmp280_trigger_handler(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct bmp280_data *data = iio_priv(indio_dev);
+ s32 adc_temp, adc_press, t_fine;
+ int ret;
+
+ guard(mutex)(&data->lock);
+
+ /* Burst read data registers */
+ ret = regmap_bulk_read(data->regmap, BMP280_REG_PRESS_MSB,
+ data->buf, BMP280_BURST_READ_BYTES);
+ if (ret) {
+ dev_err(data->dev, "failed to burst read sensor data\n");
+ goto out;
+ }
+
+ /* Temperature calculations */
+ adc_temp = FIELD_GET(BMP280_MEAS_TRIM_MASK, get_unaligned_be24(&data->buf[3]));
+ if (adc_temp == BMP280_TEMP_SKIPPED) {
+ dev_err(data->dev, "reading temperature skipped\n");
+ goto out;
+ }
+
+ data->sensor_data[1] = bmp280_compensate_temp(data, adc_temp);
+
+ /* Pressure calculations */
+ adc_press = FIELD_GET(BMP280_MEAS_TRIM_MASK, get_unaligned_be24(&data->buf[0]));
+ if (adc_press == BMP280_PRESS_SKIPPED) {
+ dev_err(data->dev, "reading pressure skipped\n");
+ goto out;
+ }
+
+ t_fine = bmp280_calc_t_fine(data, adc_temp);
+
+ data->sensor_data[0] = bmp280_compensate_press(data, adc_press, t_fine);
+
+ iio_push_to_buffers_with_timestamp(indio_dev, &data->sensor_data,
+ iio_get_time_ns(indio_dev));
+
+out:
+ iio_trigger_notify_done(indio_dev->trig);
+
+ return IRQ_HANDLED;
+}
+
static const int bmp280_oversampling_avail[] = { 1, 2, 4, 8, 16 };
static const u8 bmp280_chip_ids[] = { BMP280_CHIP_ID };
static const int bmp280_temp_coeffs[] = { 10, 1 };
@@ -914,6 +1070,7 @@ const struct bmp280_chip_info bmp280_chip_info = {
.start_up_time = 2000,
.channels = bmp280_channels,
.num_channels = ARRAY_SIZE(bmp280_channels),
+ .avail_scan_masks = bmp280_avail_scan_masks,
.oversampling_temp_avail = bmp280_oversampling_avail,
.num_oversampling_temp_avail = ARRAY_SIZE(bmp280_oversampling_avail),
@@ -942,6 +1099,8 @@ const struct bmp280_chip_info bmp280_chip_info = {
.read_temp = bmp280_read_temp,
.read_press = bmp280_read_press,
.read_calib = bmp280_read_calib,
+
+ .trigger_handler = bmp280_trigger_handler,
};
EXPORT_SYMBOL_NS(bmp280_chip_info, IIO_BMP280);
@@ -964,6 +1123,62 @@ static int bme280_chip_config(struct bmp280_data *data)
return bmp280_chip_config(data);
}
+static irqreturn_t bme280_trigger_handler(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct bmp280_data *data = iio_priv(indio_dev);
+ s32 adc_temp, adc_press, adc_humidity, t_fine;
+ int ret;
+
+ guard(mutex)(&data->lock);
+
+ /* Burst read data registers */
+ ret = regmap_bulk_read(data->regmap, BMP280_REG_PRESS_MSB,
+ data->buf, BME280_BURST_READ_BYTES);
+ if (ret) {
+ dev_err(data->dev, "failed to burst read sensor data\n");
+ goto out;
+ }
+
+ /* Temperature calculations */
+ adc_temp = FIELD_GET(BMP280_MEAS_TRIM_MASK, get_unaligned_be24(&data->buf[3]));
+ if (adc_temp == BMP280_TEMP_SKIPPED) {
+ dev_err(data->dev, "reading temperature skipped\n");
+ goto out;
+ }
+
+ data->sensor_data[1] = bmp280_compensate_temp(data, adc_temp);
+
+ /* Pressure calculations */
+ adc_press = FIELD_GET(BMP280_MEAS_TRIM_MASK, get_unaligned_be24(&data->buf[0]));
+ if (adc_press == BMP280_PRESS_SKIPPED) {
+ dev_err(data->dev, "reading pressure skipped\n");
+ goto out;
+ }
+
+ t_fine = bmp280_calc_t_fine(data, adc_temp);
+
+ data->sensor_data[0] = bmp280_compensate_press(data, adc_press, t_fine);
+
+ /* Humidity calculations */
+ adc_humidity = get_unaligned_be16(&data->buf[6]);
+
+ if (adc_humidity == BMP280_HUMIDITY_SKIPPED) {
+ dev_err(data->dev, "reading humidity skipped\n");
+ goto out;
+ }
+ data->sensor_data[2] = bme280_compensate_humidity(data, adc_humidity, t_fine);
+
+ iio_push_to_buffers_with_timestamp(indio_dev, &data->sensor_data,
+ iio_get_time_ns(indio_dev));
+
+out:
+ iio_trigger_notify_done(indio_dev->trig);
+
+ return IRQ_HANDLED;
+}
+
static const u8 bme280_chip_ids[] = { BME280_CHIP_ID };
static const int bme280_humid_coeffs[] = { 1000, 1024 };
@@ -975,6 +1190,7 @@ const struct bmp280_chip_info bme280_chip_info = {
.start_up_time = 2000,
.channels = bme280_channels,
.num_channels = ARRAY_SIZE(bme280_channels),
+ .avail_scan_masks = bme280_avail_scan_masks,
.oversampling_temp_avail = bmp280_oversampling_avail,
.num_oversampling_temp_avail = ARRAY_SIZE(bmp280_oversampling_avail),
@@ -1000,6 +1216,8 @@ const struct bmp280_chip_info bme280_chip_info = {
.read_press = bmp280_read_press,
.read_humid = bme280_read_humid,
.read_calib = bme280_read_calib,
+
+ .trigger_handler = bme280_trigger_handler,
};
EXPORT_SYMBOL_NS(bme280_chip_info, IIO_BMP280);
@@ -1054,7 +1272,7 @@ static int bmp380_read_temp_adc(struct bmp280_data *data, u32 *adc_temp)
int ret;
ret = regmap_bulk_read(data->regmap, BMP380_REG_TEMP_XLSB,
- data->buf, sizeof(data->buf));
+ data->buf, BMP280_NUM_TEMP_BYTES);
if (ret) {
dev_err(data->dev, "failed to read temperature\n");
return ret;
@@ -1123,7 +1341,7 @@ static int bmp380_read_press_adc(struct bmp280_data *data, u32 *adc_press)
int ret;
ret = regmap_bulk_read(data->regmap, BMP380_REG_PRESS_XLSB,
- data->buf, sizeof(data->buf));
+ data->buf, BMP280_NUM_PRESS_BYTES);
if (ret) {
dev_err(data->dev, "failed to read pressure\n");
return ret;
@@ -1384,6 +1602,53 @@ static int bmp380_chip_config(struct bmp280_data *data)
return 0;
}
+static irqreturn_t bmp380_trigger_handler(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct bmp280_data *data = iio_priv(indio_dev);
+ s32 adc_temp, adc_press, t_fine;
+ int ret;
+
+ guard(mutex)(&data->lock);
+
+ /* Burst read data registers */
+ ret = regmap_bulk_read(data->regmap, BMP380_REG_PRESS_XLSB,
+ data->buf, BMP280_BURST_READ_BYTES);
+ if (ret) {
+ dev_err(data->dev, "failed to burst read sensor data\n");
+ goto out;
+ }
+
+ /* Temperature calculations */
+ adc_temp = get_unaligned_le24(&data->buf[3]);
+ if (adc_temp == BMP380_TEMP_SKIPPED) {
+ dev_err(data->dev, "reading temperature skipped\n");
+ goto out;
+ }
+
+ data->sensor_data[1] = bmp380_compensate_temp(data, adc_temp);
+
+ /* Pressure calculations */
+ adc_press = get_unaligned_le24(&data->buf[0]);
+ if (adc_press == BMP380_PRESS_SKIPPED) {
+ dev_err(data->dev, "reading pressure skipped\n");
+ goto out;
+ }
+
+ t_fine = bmp380_calc_t_fine(data, adc_temp);
+
+ data->sensor_data[0] = bmp380_compensate_press(data, adc_press, t_fine);
+
+ iio_push_to_buffers_with_timestamp(indio_dev, &data->sensor_data,
+ iio_get_time_ns(indio_dev));
+
+out:
+ iio_trigger_notify_done(indio_dev->trig);
+
+ return IRQ_HANDLED;
+}
+
static const int bmp380_oversampling_avail[] = { 1, 2, 4, 8, 16, 32 };
static const int bmp380_iir_filter_coeffs_avail[] = { 1, 2, 4, 8, 16, 32, 64, 128};
static const u8 bmp380_chip_ids[] = { BMP380_CHIP_ID, BMP390_CHIP_ID };
@@ -1399,6 +1664,7 @@ const struct bmp280_chip_info bmp380_chip_info = {
.start_up_time = 2000,
.channels = bmp380_channels,
.num_channels = ARRAY_SIZE(bmp380_channels),
+ .avail_scan_masks = bmp280_avail_scan_masks,
.oversampling_temp_avail = bmp380_oversampling_avail,
.num_oversampling_temp_avail = ARRAY_SIZE(bmp380_oversampling_avail),
@@ -1426,6 +1692,8 @@ const struct bmp280_chip_info bmp380_chip_info = {
.read_press = bmp380_read_press,
.read_calib = bmp380_read_calib,
.preinit = bmp380_preinit,
+
+ .trigger_handler = bmp380_trigger_handler,
};
EXPORT_SYMBOL_NS(bmp380_chip_info, IIO_BMP280);
@@ -1546,8 +1814,8 @@ static int bmp580_read_temp(struct bmp280_data *data, s32 *raw_temp)
s32 value_temp;
int ret;
- ret = regmap_bulk_read(data->regmap, BMP580_REG_TEMP_XLSB, data->buf,
- sizeof(data->buf));
+ ret = regmap_bulk_read(data->regmap, BMP580_REG_TEMP_XLSB,
+ data->buf, BMP280_NUM_TEMP_BYTES);
if (ret) {
dev_err(data->dev, "failed to read temperature\n");
return ret;
@@ -1568,8 +1836,8 @@ static int bmp580_read_press(struct bmp280_data *data, u32 *raw_press)
u32 value_press;
int ret;
- ret = regmap_bulk_read(data->regmap, BMP580_REG_PRESS_XLSB, data->buf,
- sizeof(data->buf));
+ ret = regmap_bulk_read(data->regmap, BMP580_REG_PRESS_XLSB,
+ data->buf, BMP280_NUM_PRESS_BYTES);
if (ret) {
dev_err(data->dev, "failed to read pressure\n");
return ret;
@@ -1916,6 +2184,38 @@ static int bmp580_chip_config(struct bmp280_data *data)
return 0;
}
+static irqreturn_t bmp580_trigger_handler(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct bmp280_data *data = iio_priv(indio_dev);
+ int ret;
+
+ guard(mutex)(&data->lock);
+
+ /* Burst read data registers */
+ ret = regmap_bulk_read(data->regmap, BMP580_REG_TEMP_XLSB,
+ data->buf, BMP280_BURST_READ_BYTES);
+ if (ret) {
+ dev_err(data->dev, "failed to burst read sensor data\n");
+ goto out;
+ }
+
+ /* Temperature calculations */
+ memcpy(&data->sensor_data[1], &data->buf[0], 3);
+
+ /* Pressure calculations */
+ memcpy(&data->sensor_data[0], &data->buf[3], 3);
+
+ iio_push_to_buffers_with_timestamp(indio_dev, &data->sensor_data,
+ iio_get_time_ns(indio_dev));
+
+out:
+ iio_trigger_notify_done(indio_dev->trig);
+
+ return IRQ_HANDLED;
+}
+
static const int bmp580_oversampling_avail[] = { 1, 2, 4, 8, 16, 32, 64, 128 };
static const u8 bmp580_chip_ids[] = { BMP580_CHIP_ID, BMP580_CHIP_ID_ALT };
/* Instead of { 1000, 16 } we do this, to avoid overflow issues */
@@ -1928,8 +2228,9 @@ const struct bmp280_chip_info bmp580_chip_info = {
.num_chip_id = ARRAY_SIZE(bmp580_chip_ids),
.regmap_config = &bmp580_regmap_config,
.start_up_time = 2000,
- .channels = bmp380_channels,
- .num_channels = ARRAY_SIZE(bmp380_channels),
+ .channels = bmp580_channels,
+ .num_channels = ARRAY_SIZE(bmp580_channels),
+ .avail_scan_masks = bmp280_avail_scan_masks,
.oversampling_temp_avail = bmp580_oversampling_avail,
.num_oversampling_temp_avail = ARRAY_SIZE(bmp580_oversampling_avail),
@@ -1956,6 +2257,8 @@ const struct bmp280_chip_info bmp580_chip_info = {
.read_temp = bmp580_read_temp,
.read_press = bmp580_read_press,
.preinit = bmp580_preinit,
+
+ .trigger_handler = bmp580_trigger_handler,
};
EXPORT_SYMBOL_NS(bmp580_chip_info, IIO_BMP280);
@@ -2134,7 +2437,7 @@ static int bmp180_read_press_adc(struct bmp280_data *data, u32 *adc_press)
return ret;
ret = regmap_bulk_read(data->regmap, BMP180_REG_OUT_MSB,
- data->buf, sizeof(data->buf));
+ data->buf, BMP280_NUM_PRESS_BYTES);
if (ret) {
dev_err(data->dev, "failed to read pressure\n");
return ret;
@@ -2205,6 +2508,36 @@ static int bmp180_chip_config(struct bmp280_data *data)
return 0;
}
+static irqreturn_t bmp180_trigger_handler(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct bmp280_data *data = iio_priv(indio_dev);
+ int ret, chan_value;
+
+ guard(mutex)(&data->lock);
+
+ ret = bmp180_read_temp(data, &chan_value);
+ if (ret)
+ goto out;
+
+ data->sensor_data[1] = chan_value;
+
+ ret = bmp180_read_press(data, &chan_value);
+ if (ret)
+ goto out;
+
+ data->sensor_data[0] = chan_value;
+
+ iio_push_to_buffers_with_timestamp(indio_dev, &data->sensor_data,
+ iio_get_time_ns(indio_dev));
+
+out:
+ iio_trigger_notify_done(indio_dev->trig);
+
+ return IRQ_HANDLED;
+}
+
static const int bmp180_oversampling_temp_avail[] = { 1 };
static const int bmp180_oversampling_press_avail[] = { 1, 2, 4, 8 };
static const u8 bmp180_chip_ids[] = { BMP180_CHIP_ID };
@@ -2219,6 +2552,7 @@ const struct bmp280_chip_info bmp180_chip_info = {
.start_up_time = 2000,
.channels = bmp280_channels,
.num_channels = ARRAY_SIZE(bmp280_channels),
+ .avail_scan_masks = bmp280_avail_scan_masks,
.oversampling_temp_avail = bmp180_oversampling_temp_avail,
.num_oversampling_temp_avail =
@@ -2239,6 +2573,8 @@ const struct bmp280_chip_info bmp180_chip_info = {
.read_temp = bmp180_read_temp,
.read_press = bmp180_read_press,
.read_calib = bmp180_read_calib,
+
+ .trigger_handler = bmp180_trigger_handler,
};
EXPORT_SYMBOL_NS(bmp180_chip_info, IIO_BMP280);
@@ -2284,6 +2620,30 @@ static int bmp085_fetch_eoc_irq(struct device *dev,
return 0;
}
+static int bmp280_buffer_preenable(struct iio_dev *indio_dev)
+{
+ struct bmp280_data *data = iio_priv(indio_dev);
+
+ pm_runtime_get_sync(data->dev);
+
+ return 0;
+}
+
+static int bmp280_buffer_postdisable(struct iio_dev *indio_dev)
+{
+ struct bmp280_data *data = iio_priv(indio_dev);
+
+ pm_runtime_mark_last_busy(data->dev);
+ pm_runtime_put_autosuspend(data->dev);
+
+ return 0;
+}
+
+static const struct iio_buffer_setup_ops bmp280_buffer_setup_ops = {
+ .preenable = bmp280_buffer_preenable,
+ .postdisable = bmp280_buffer_postdisable,
+};
+
static void bmp280_pm_disable(void *data)
{
struct device *dev = data;
@@ -2330,6 +2690,7 @@ int bmp280_common_probe(struct device *dev,
/* Apply initial values from chip info structure */
indio_dev->channels = chip_info->channels;
indio_dev->num_channels = chip_info->num_channels;
+ indio_dev->available_scan_masks = chip_info->avail_scan_masks;
data->oversampling_press = chip_info->oversampling_press_default;
data->oversampling_humid = chip_info->oversampling_humid_default;
data->oversampling_temp = chip_info->oversampling_temp_default;
@@ -2415,6 +2776,14 @@ int bmp280_common_probe(struct device *dev,
"failed to read calibration coefficients\n");
}
+ ret = devm_iio_triggered_buffer_setup(data->dev, indio_dev,
+ iio_pollfunc_store_time,
+ data->chip_info->trigger_handler,
+ &bmp280_buffer_setup_ops);
+ if (ret)
+ return dev_err_probe(data->dev, ret,
+ "iio triggered buffer setup failed\n");
+
/*
* Attempt to grab an optional EOC IRQ - only the BMP085 has this
* however as it happens, the BMP085 shares the chip ID of BMP180
diff --git a/drivers/iio/pressure/bmp280-spi.c b/drivers/iio/pressure/bmp280-spi.c
index 62b4e58104cf..e5abee15950e 100644
--- a/drivers/iio/pressure/bmp280-spi.c
+++ b/drivers/iio/pressure/bmp280-spi.c
@@ -40,14 +40,10 @@ static int bmp380_regmap_spi_read(void *context, const void *reg,
size_t reg_size, void *val, size_t val_size)
{
struct spi_device *spi = to_spi_device(context);
- u8 rx_buf[4];
+ u8 rx_buf[BME280_BURST_READ_BYTES + 1];
ssize_t status;
- /*
- * Maximum number of consecutive bytes read for a temperature or
- * pressure measurement is 3.
- */
- if (val_size > 3)
+ if (val_size > BME280_BURST_READ_BYTES)
return -EINVAL;
/*
diff --git a/drivers/iio/pressure/bmp280.h b/drivers/iio/pressure/bmp280.h
index a3d2cd722760..0933e411ae2c 100644
--- a/drivers/iio/pressure/bmp280.h
+++ b/drivers/iio/pressure/bmp280.h
@@ -304,6 +304,16 @@
#define BMP280_PRESS_SKIPPED 0x80000
#define BMP280_HUMIDITY_SKIPPED 0x8000
+/* Number of bytes for each value */
+#define BMP280_NUM_PRESS_BYTES 3
+#define BMP280_NUM_TEMP_BYTES 3
+#define BME280_NUM_HUMIDITY_BYTES 2
+#define BMP280_BURST_READ_BYTES (BMP280_NUM_PRESS_BYTES + \
+ BMP280_NUM_TEMP_BYTES)
+#define BME280_BURST_READ_BYTES (BMP280_NUM_PRESS_BYTES + \
+ BMP280_NUM_TEMP_BYTES + \
+ BME280_NUM_HUMIDITY_BYTES)
+
/* Core exported structs */
static const char *const bmp280_supply_names[] = {
@@ -397,13 +407,19 @@ struct bmp280_data {
*/
int sampling_freq;
+ /*
+ * Data to push to userspace triggered buffer. Up to 3 channels and
+ * s64 timestamp, aligned.
+ */
+ s32 sensor_data[6] __aligned(8);
+
/*
* DMA (thus cache coherency maintenance) may require the
* transfer buffers to live in their own cache lines.
*/
union {
/* Sensor data buffer */
- u8 buf[3];
+ u8 buf[BME280_BURST_READ_BYTES];
/* Calibration data buffers */
__le16 bmp280_cal_buf[BMP280_CONTIGUOUS_CALIB_REGS / 2];
__be16 bmp180_cal_buf[BMP180_REG_CALIB_COUNT / 2];
@@ -425,6 +441,7 @@ struct bmp280_chip_info {
const struct iio_chan_spec *channels;
int num_channels;
unsigned int start_up_time;
+ const unsigned long *avail_scan_masks;
const int *oversampling_temp_avail;
int num_oversampling_temp_avail;
@@ -459,6 +476,8 @@ struct bmp280_chip_info {
int (*read_humid)(struct bmp280_data *data, u32 *adc_humidity);
int (*read_calib)(struct bmp280_data *data);
int (*preinit)(struct bmp280_data *data);
+
+ irqreturn_t (*trigger_handler)(int irq, void *p);
};
/* Chip infos for each variant */
--
2.25.1
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