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

[Vasileios Amoiridis]

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@xxxxxxxxx>
---
 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