[PATCH v1 01/10] iio: pressure: bmp280: Fix regmap for BMP280 device

Vasileios Amoiridis
2024-07-11T21:16:20Z

Up to now, the BMP280 device is using the regmap of the BME280 which
has registers that exist only in the BME280 device.

Fixes: 14e8015f8569 ("iio: pressure: bmp280: split driver in logical parts")
Signed-off-by: Vasileios Amoiridis <vassilisamir@gmail.com>
---
drivers/iio/pressure/bmp280-core.c | 2 +-
drivers/iio/pressure/bmp280-regmap.c | 45 ++++++++++++++++++++++++++--
drivers/iio/pressure/bmp280.h | 1 +
3 files changed, 44 insertions(+), 4 deletions(-)

diff --git a/drivers/iio/pressure/bmp280-core.c b/drivers/iio/pressure/bmp280-core.c
index 2fc5724196e3..cc8553177977 100644
--- a/drivers/iio/pressure/bmp280-core.c
+++ b/drivers/iio/pressure/bmp280-core.c
@@ -1186,7 +1186,7 @@ const struct bmp280_chip_info bme280_chip_info = {
.id_reg = BMP280_REG_ID,
.chip_id = bme280_chip_ids,
.num_chip_id = ARRAY_SIZE(bme280_chip_ids),
- .regmap_config = &bmp280_regmap_config,
+ .regmap_config = &bme280_regmap_config,
.start_up_time = 2000,
.channels = bme280_channels,
.num_channels = ARRAY_SIZE(bme280_channels),
diff --git a/drivers/iio/pressure/bmp280-regmap.c b/drivers/iio/pressure/bmp280-regmap.c
index fa52839474b1..d27d68edd906 100644
--- a/drivers/iio/pressure/bmp280-regmap.c
+++ b/drivers/iio/pressure/bmp280-regmap.c
@@ -41,7 +41,7 @@ const struct regmap_config bmp180_regmap_config = {
};
EXPORT_SYMBOL_NS(bmp180_regmap_config, IIO_BMP280);

-static bool bmp280_is_writeable_reg(struct device *dev, unsigned int reg)
+static bool bme280_is_writeable_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case BMP280_REG_CONFIG:
@@ -54,7 +54,35 @@ static bool bmp280_is_writeable_reg(struct device *dev, unsigned int reg)
}
}

+static bool bmp280_is_writeable_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case BMP280_REG_CONFIG:
+ case BMP280_REG_CTRL_MEAS:
+ case BMP280_REG_RESET:
+ return true;
+ default:
+ return false;
+ }
+}
+
static bool bmp280_is_volatile_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case BMP280_REG_TEMP_XLSB:
+ case BMP280_REG_TEMP_LSB:
+ case BMP280_REG_TEMP_MSB:
+ case BMP280_REG_PRESS_XLSB:
+ case BMP280_REG_PRESS_LSB:
+ case BMP280_REG_PRESS_MSB:
+ case BMP280_REG_STATUS:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool bme280_is_volatile_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case BME280_REG_HUMIDITY_LSB:
@@ -71,7 +99,6 @@ static bool bmp280_is_volatile_reg(struct device *dev, unsigned int reg)
return false;
}
}
-
static bool bmp380_is_writeable_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
@@ -167,7 +194,7 @@ const struct regmap_config bmp280_regmap_config = {
.reg_bits = 8,
.val_bits = 8,

- .max_register = BME280_REG_HUMIDITY_LSB,
+ .max_register = BMP280_REG_TEMP_XLSB,
.cache_type = REGCACHE_RBTREE,

.writeable_reg = bmp280_is_writeable_reg,
@@ -175,6 +202,18 @@ const struct regmap_config bmp280_regmap_config = {
};
EXPORT_SYMBOL_NS(bmp280_regmap_config, IIO_BMP280);

+const struct regmap_config bme280_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = BME280_REG_HUMIDITY_LSB,
+ .cache_type = REGCACHE_RBTREE,
+
+ .writeable_reg = bme280_is_writeable_reg,
+ .volatile_reg = bme280_is_volatile_reg,
+};
+EXPORT_SYMBOL_NS(bme280_regmap_config, IIO_BMP280);
+
const struct regmap_config bmp380_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
diff --git a/drivers/iio/pressure/bmp280.h b/drivers/iio/pressure/bmp280.h
index 0933e411ae2c..4b0ebce001df 100644
--- a/drivers/iio/pressure/bmp280.h
+++ b/drivers/iio/pressure/bmp280.h
@@ -490,6 +490,7 @@ extern const struct bmp280_chip_info bmp580_chip_info;
/* Regmap configurations */
extern const struct regmap_config bmp180_regmap_config;
extern const struct regmap_config bmp280_regmap_config;
+extern const struct regmap_config bme280_regmap_config;
extern const struct regmap_config bmp380_regmap_config;
extern const struct regmap_config bmp580_regmap_config;

--
2.25.1