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Date: Tue, 19 Mar 2024 01:29:24 +0100
From: Vasileios Amoiridis <vassilisamir@...il.com>
To: jic23@...nel.org
Cc: lars@...afoo.de,
andriy.shevchenko@...ux.intel.com,
ang.iglesiasg@...il.com,
mazziesaccount@...il.com,
ak@...klinger.de,
petre.rodan@...dimension.ro,
phil@...pberrypi.com,
579lpy@...il.com,
linus.walleij@...aro.org,
semen.protsenko@...aro.org,
linux-iio@...r.kernel.org,
linux-kernel@...r.kernel.org,
Vasileios Amoiridis <vassilisamir@...il.com>
Subject: [PATCH v3 5/6] iio: pressure: Add timestamp and scan_masks for BMP280 driver
The scan mask for the BME280 supports humidity measurement and
needs to be distinguished from the rest in order for the timestamp
to be able to work.
Signed-off-by: Vasileios Amoiridis <vassilisamir@...il.com>
---
drivers/iio/pressure/bmp280-core.c | 111 +++++++++++++++++++++++++----
drivers/iio/pressure/bmp280.h | 1 +
2 files changed, 98 insertions(+), 14 deletions(-)
diff --git a/drivers/iio/pressure/bmp280-core.c b/drivers/iio/pressure/bmp280-core.c
index 312bc2617583..ddfcd23f29a0 100644
--- a/drivers/iio/pressure/bmp280-core.c
+++ b/drivers/iio/pressure/bmp280-core.c
@@ -134,7 +134,28 @@ enum {
BMP380_P11 = 20,
};
+enum bmp280_scan {
+ BMP280_TEMP,
+ BMP280_PRESS,
+ BME280_HUMID
+};
+
static const struct iio_chan_spec bmp280_channels[] = {
+ {
+ .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),
+ .scan_index = 0,
+ .scan_type = {
+ .sign = 's',
+ .realbits = 32,
+ .storagebits = 32,
+ .endianness = IIO_CPU,
+ },
+ },
{
.type = IIO_PRESSURE,
/* PROCESSED maintained for ABI backwards compatibility */
@@ -142,7 +163,18 @@ 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 = 'u',
+ .realbits = 32,
+ .storagebits = 32,
+ .endianness = IIO_CPU,
+ },
},
+ IIO_CHAN_SOFT_TIMESTAMP(2),
+};
+
+static const struct iio_chan_spec bme280_channels[] = {
{
.type = IIO_TEMP,
/* PROCESSED maintained for ABI backwards compatibility */
@@ -150,28 +182,48 @@ 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 = 's',
+ .realbits = 32,
+ .storagebits = 32,
+ .endianness = IIO_CPU,
+ },
},
{
- .type = IIO_HUMIDITYRELATIVE,
+ .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),
+ .scan_index = 1,
+ .scan_type = {
+ .sign = 'u',
+ .realbits = 32,
+ .storagebits = 32,
+ .endianness = IIO_CPU,
+ },
},
-};
-
-static const struct iio_chan_spec bmp380_channels[] = {
{
- .type = IIO_PRESSURE,
+ .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),
- .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ) |
- BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY),
+ .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[] = {
{
.type = IIO_TEMP,
/* PROCESSED maintained for ABI backwards compatibility */
@@ -181,9 +233,16 @@ 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 = 's',
+ .realbits = 32,
+ .storagebits = 32,
+ .endianness = IIO_CPU,
+ },
},
{
- .type = IIO_HUMIDITYRELATIVE,
+ .type = IIO_PRESSURE,
/* PROCESSED maintained for ABI backwards compatibility */
.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
BIT(IIO_CHAN_INFO_RAW) |
@@ -191,7 +250,15 @@ 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 = 'u',
+ .realbits = 32,
+ .storagebits = 32,
+ .endianness = IIO_CPU,
+ },
},
+ IIO_CHAN_SOFT_TIMESTAMP(2),
};
static int bmp280_read_calib(struct bmp280_data *data)
@@ -825,6 +892,16 @@ static const struct iio_info bmp280_info = {
.write_raw = &bmp280_write_raw,
};
+static const unsigned long bmp280_avail_scan_masks[] = {
+ BIT(BMP280_PRESS) | BIT(BMP280_TEMP),
+ 0
+};
+
+static const unsigned long bme280_avail_scan_masks[] = {
+ BIT(BME280_HUMID) | BIT(BMP280_PRESS) | BIT(BMP280_TEMP),
+ 0
+};
+
static int bmp280_chip_config(struct bmp280_data *data)
{
u8 osrs = FIELD_PREP(BMP280_OSRS_TEMP_MASK, data->oversampling_temp + 1) |
@@ -866,7 +943,8 @@ 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 = 3,
+ .avail_scan_masks = bmp280_avail_scan_masks,
.oversampling_temp_avail = bmp280_oversampling_avail,
.num_oversampling_temp_avail = ARRAY_SIZE(bmp280_oversampling_avail),
@@ -925,8 +1003,9 @@ 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 = 4,
+ .avail_scan_masks = bme280_avail_scan_masks,
.oversampling_temp_avail = bmp280_oversampling_avail,
.num_oversampling_temp_avail = ARRAY_SIZE(bmp280_oversampling_avail),
@@ -1300,7 +1379,8 @@ const struct bmp280_chip_info bmp380_chip_info = {
.regmap_config = &bmp380_regmap_config,
.start_up_time = 2000,
.channels = bmp380_channels,
- .num_channels = 2,
+ .num_channels = 3,
+ .avail_scan_masks = bmp280_avail_scan_masks,
.oversampling_temp_avail = bmp380_oversampling_avail,
.num_oversampling_temp_avail = ARRAY_SIZE(bmp380_oversampling_avail),
@@ -1795,7 +1875,8 @@ 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 = 3,
+ .avail_scan_masks = bmp280_avail_scan_masks,
.oversampling_temp_avail = bmp580_oversampling_avail,
.num_oversampling_temp_avail = ARRAY_SIZE(bmp580_oversampling_avail),
@@ -2054,7 +2135,8 @@ 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 = 3,
+ .avail_scan_masks = bmp280_avail_scan_masks,
.oversampling_temp_avail = bmp180_oversampling_temp_avail,
.num_oversampling_temp_avail =
@@ -2166,6 +2248,7 @@ 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;
diff --git a/drivers/iio/pressure/bmp280.h b/drivers/iio/pressure/bmp280.h
index 6d1dca31dd52..8cc3eed70c18 100644
--- a/drivers/iio/pressure/bmp280.h
+++ b/drivers/iio/pressure/bmp280.h
@@ -427,6 +427,7 @@ 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;
--
2.25.1
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