--- zzzz-none-000/linux-5.4.213/drivers/iio/pressure/bmp280.h	2022-09-15 10:04:56.000000000 +0000
+++ alder-5690pro-762/linux-5.4.213/drivers/iio/pressure/bmp280.h	2024-08-14 09:01:58.000000000 +0000
@@ -87,6 +87,59 @@
 #define BMP180_MEAS_PRESS_4X		BMP180_MEAS_PRESS_X(2)
 #define BMP180_MEAS_PRESS_8X		BMP180_MEAS_PRESS_X(3)
 
+/* BMP390 specific registers */
+#define BMP390_REG_TEMP_XLSB		0x07
+#define BMP390_REG_TEMP_LSB		0x08
+#define BMP390_REG_TEMP_MSB		0x09
+#define BMP390_REG_PRESS_XLSB		0x04
+#define BMP390_REG_PRESS_LSB		0x05
+#define BMP390_REG_PRESS_MSB		0x06
+#define BMP390_REG_OSR			0x1C
+#define BMP390_REG_ODR			0x1D
+#define BMP390_REG_PWR_CTRL		0x1B
+#define BMP390_REG_CONFIG		0x1F
+#define BMP390_REG_COMP_TEMP_START	0x31
+#define BMP390_TEMP_CALIB_DATA_LEN	5
+#define BMP390_REG_COMP_PRESS_START	0x36
+#define BMP390_PRESS_CALIB_DATA_LEN	16
+#define BMP390_REG_STATUS		0x03
+#define BMP390_REG_CMD			0x7E
+#define BMP390_REG_ERR			0x02
+#define BMP390_REG_ID			0x00
+#define BMP390_REG_REV			0x01
+
+/* Oversampling macros */
+#define BMP390_OSR_TEMP_X(osr_t)	((osr_t) << 3)
+#define BMP390_OSR_TEMP_MASK		(BIT(5) | BIT(4) | BIT(3))
+#define BMP390_OSR_PRESS_X(osr_p)	((osr_p) << 0)
+#define BMP390_OSR_PRESS_MASK		(BIT(2) | BIT(1) | BIT(0))
+#define BMP390_PRESS_EN_MASK		BIT(0)
+#define BMP390_TEMP_EN_MASK		BIT(1)
+#define BMP390_PRESS_EN			BIT(0)
+#define BMP390_TEMP_EN			BIT(1)
+/* Power mode macros */
+#define BMP390_MODE_MASK                (BIT(5) | BIT(4))
+#define BMP390_MODE_NORMAL		(BIT(5) | BIT(4))
+#define BMP390_MODE_SLEEP		0
+#define BMP390_MODE_FORCED		BIT(5)
+/* IIR Filter macros */
+#define BMP390_FILTER_MASK		(BIT(3) | BIT(2) | BIT(1))
+#define BMP390_FILTER_COEFF_1		BIT(1)
+#define BMP390_FILTER_COEFF_3		BIT(2)
+#define BMP390_FILTER_COEFF_7		(BIT(2) | BIT(1))
+#define BMP390_FILTER_COEFF_15		BIT(3)
+#define BMP390_FILTER_COEFF_31		(BIT(3) | BIT(1))
+#define BMP390_FILTER_COEFF_63		(BIT(3) | BIT(2))
+#define BMP390_FILTER_COEFF_127		(BIT(3) | BIT(2) | BIT(1))
+/* Status macros */
+#define BMP390_CMD_READY		BIT(4)
+#define BMP390_CMD_ERR			(BIT(2) | BIT(1) | BIT(0))
+#define BMP390_TEMP_DRDY		BIT(6)
+#define BMP390_PRESS_DRDY		BIT(5)
+#define BMP390_ODR_25Hz			0x03
+/* Macro to combine two 8 bit data to form a 16 bit data */
+#define BMP390_CONCAT_BYTES(msb,lsb)	(((uint16_t)msb << 8 ) | (uint16_t)lsb)
+
 /* BMP180 and BMP280 common registers */
 #define BMP280_REG_CTRL_MEAS		0xF4
 #define BMP280_REG_RESET		0xE0
@@ -95,7 +148,14 @@
 #define BMP180_CHIP_ID			0x55
 #define BMP280_CHIP_ID			0x58
 #define BME280_CHIP_ID			0x60
+/* CHIP_ID being the same for BME280 and BMP390, considering the revision id along with the chip_id for BMP390
+ * CHIP_ID: 0x6001
+ */
+#define BMP390_CHIP_ID_VALUE		0x60
+#define BMP390_REV_ID			0x01
+#define BMP390_CHIP_ID			((BMP390_CHIP_ID_VALUE << 8) | (BMP390_REV_ID))
 #define BMP280_SOFT_RESET_VAL		0xB6
+#define BMP390_SOFT_RESET_VAL		0xB6
 
 /* BMP280 register skipped special values */
 #define BMP280_TEMP_SKIPPED		0x80000
@@ -105,6 +165,7 @@
 /* Regmap configurations */
 extern const struct regmap_config bmp180_regmap_config;
 extern const struct regmap_config bmp280_regmap_config;
+extern const struct regmap_config bmp390_regmap_config;
 
 /* Probe called from different transports */
 int bmp280_common_probe(struct device *dev,