Date:   Mon, 26 Dec 2022 15:29:22 +0100
From:   Angel Iglesias <ang.iglesiasg@...il.com>
To:     linux-iio@...r.kernel.org
Cc:     Angel Iglesias <ang.iglesiasg@...il.com>,
        Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Nikita Yushchenko <nikita.yoush@...entembedded.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Paul Cercueil <paul@...pouillou.net>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Andreas Klinger <ak@...klinger.de>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 3/5] iio: pressure: bmp280: Add support for new sensor BMP580

Adds compatibility with the new sensor generation, the BMP580.

The measurement and initialization codepaths are adapted from
the device datasheet and the repository from manufacturer at
https://github.com/boschsensortec/BMP5-Sensor-API.

Signed-off-by: Angel Iglesias <ang.iglesiasg@...il.com>

diff --git a/drivers/iio/pressure/Kconfig b/drivers/iio/pressure/Kconfig
index c9453389e4f7..1c18e3b2c501 100644
--- a/drivers/iio/pressure/Kconfig
+++ b/drivers/iio/pressure/Kconfig
@@ -17,14 +17,14 @@ config ABP060MG
 	  will be called abp060mg.
 
 config BMP280
-	tristate "Bosch Sensortec BMP180/BMP280/BMP380 pressure sensor I2C driver"
+	tristate "Bosch Sensortec BMP180/BMP280/BMP380/BMP580 pressure sensor I2C driver"
 	depends on (I2C || SPI_MASTER)
 	select REGMAP
 	select BMP280_I2C if (I2C)
 	select BMP280_SPI if (SPI_MASTER)
 	help
-	  Say yes here to build support for Bosch Sensortec BMP180, BMP280 and
-	  BMP380 pressure and temperature sensors. Also supports the BME280 with
+	  Say yes here to build support for Bosch Sensortec BMP180, BMP280, BMP380
+	  and BMP580 pressure and temperature sensors. Also supports the BME280 with
 	  an additional humidity sensor channel.
 
 	  To compile this driver as a module, choose M here: the core module
diff --git a/drivers/iio/pressure/bmp280-core.c b/drivers/iio/pressure/bmp280-core.c
index c37cf2caec68..44901c6eb2f9 100644
--- a/drivers/iio/pressure/bmp280-core.c
+++ b/drivers/iio/pressure/bmp280-core.c
@@ -13,6 +13,7 @@
  * https://www.bosch-sensortec.com/media/boschsensortec/downloads/datasheets/bst-bmp280-ds001.pdf
  * https://www.bosch-sensortec.com/media/boschsensortec/downloads/datasheets/bst-bme280-ds002.pdf
  * https://www.bosch-sensortec.com/media/boschsensortec/downloads/datasheets/bst-bmp388-ds001.pdf
+ * https://www.bosch-sensortec.com/media/boschsensortec/downloads/datasheets/bst-bmp581-ds004.pdf
  *
  * Notice:
  * The link to the bmp180 datasheet points to an outdated version missing these changes:
@@ -130,6 +131,41 @@ enum bmp380_odr {
 	BMP380_ODR_0_0015HZ,
 };
 
+enum bmp580_odr {
+	BMP580_ODR_240HZ,
+	BMP580_ODR_218HZ,
+	BMP580_ODR_199HZ,
+	BMP580_ODR_179HZ,
+	BMP580_ODR_160HZ,
+	BMP580_ODR_149HZ,
+	BMP580_ODR_140HZ,
+	BMP580_ODR_129HZ,
+	BMP580_ODR_120HZ,
+	BMP580_ODR_110HZ,
+	BMP580_ODR_100HZ,
+	BMP580_ODR_89HZ,
+	BMP580_ODR_80HZ,
+	BMP580_ODR_70HZ,
+	BMP580_ODR_60HZ,
+	BMP580_ODR_50HZ,
+	BMP580_ODR_45HZ,
+	BMP580_ODR_40HZ,
+	BMP580_ODR_35HZ,
+	BMP580_ODR_30HZ,
+	BMP580_ODR_25HZ,
+	BMP580_ODR_20HZ,
+	BMP580_ODR_15HZ,
+	BMP580_ODR_10HZ,
+	BMP580_ODR_5HZ,
+	BMP580_ODR_4HZ,
+	BMP580_ODR_3HZ,
+	BMP580_ODR_2HZ,
+	BMP580_ODR_1HZ,
+	BMP580_ODR_0_5HZ,
+	BMP580_ODR_0_25HZ,
+	BMP580_ODR_0_125HZ,
+};
+
 struct bmp280_data {
 	struct device *dev;
 	struct mutex lock;
@@ -1361,6 +1397,399 @@ static const struct bmp280_chip_info bmp380_chip_info = {
 	.preinit = bmp380_preinit,
 };
 
+enum bmp580_commands {
+	BMP580_SOFT_RESET_CMD,
+	BMP580_NVM_WRITE_CMD,
+	BMP580_NVM_READ_CMD,
+	BMP580_EXT_MODE_CMD,
+};
+
+/*
+ * Helper function to send a command to BMP5XX sensors.
+ *
+ * BMP5xx sensors have a series of commands actionable
+ * writing specific sequences on the CMD register:
+ * SOFT_RESET: performs a reset of the system.
+ * NVM_READ: read the contents of a user position of the nvm memory.
+ * NVM_WRITE: write new data to a user position of the nvm memory.
+ * EXT_MODE: enable extended mode with additional debug pages.
+ */
+static int bmp580_cmd(struct bmp280_data *data, enum bmp580_commands cmd)
+{
+	unsigned long deadline;
+	unsigned int reg;
+	int ret;
+
+	switch (cmd) {
+	case BMP580_SOFT_RESET_CMD:
+		/* Send reset word */
+		ret = regmap_write(data->regmap, BMP580_REG_CMD, BMP580_CMD_SOFT_RESET);
+		if (ret) {
+			dev_err(data->dev, "failed to send reset command to device\n");
+			return ret;
+		}
+		/* Wait 2ms for reset completion */
+		usleep_range(2000, 2500);
+		/* Dummy read of chip_id */
+		ret = regmap_read(data->regmap, BMP580_REG_CHIP_ID, &reg);
+		if (ret) {
+			dev_err(data->dev, "failed to reestablish comms after reset\n");
+			return ret;
+		}
+		/* Check if POR bit is set on interrupt reg */
+		ret = regmap_read(data->regmap, BMP580_REG_INT_STATUS, &reg);
+		if (ret) {
+			dev_err(data->dev, "error reading interrupt status register\n");
+			return ret;
+		}
+		if (!(reg & BMP580_INT_STATUS_POR_MASK)) {
+			dev_err(data->dev, "error resetting sensor\n");
+			return -EINVAL;
+		}
+		break;
+	case BMP580_NVM_WRITE_CMD:
+	case BMP580_NVM_READ_CMD:
+		/* Check nvm ready flag */
+		ret = regmap_read(data->regmap, BMP580_REG_STATUS, &reg);
+		if (ret) {
+			dev_err(data->dev, "failed to check nvm status\n");
+			return ret;
+		}
+		if (!(reg & BMP580_STATUS_NVM_RDY_MASK)) {
+			dev_err(data->dev, "sensor's nvm is not ready\n");
+			return -EIO;
+		}
+		/* Send NVM operation sequence */
+		ret = regmap_write(data->regmap, BMP580_REG_CMD, BMP580_CMD_NVM_OP_SEQ_0);
+		if (ret) {
+			dev_err(data->dev, "failed to send nvm operation's first sequence\n");
+			return ret;
+		}
+		if (cmd == BMP580_NVM_WRITE_CMD) {
+			/* Send write sequence */
+			ret = regmap_write(data->regmap, BMP580_REG_CMD,
+					   BMP580_CMD_NVM_WRITE_SEQ_1);
+			if (ret) {
+				dev_err(data->dev, "failed to send nvm write sequence\n");
+				return ret;
+			}
+			/* Datasheet says on 4.8.1.2 it takes approximately 10ms */
+			usleep_range(10000, 10500);
+			deadline = jiffies + msecs_to_jiffies(10);
+		} else {
+			/* Send read sequence */
+			ret = regmap_write(data->regmap, BMP580_REG_CMD,
+					   BMP580_CMD_NVM_READ_SEQ_1);
+			if (ret) {
+				dev_err(data->dev, "failed to send nvm read sequence\n");
+				return ret;
+			}
+			/* Datasheet says on 4.8.1.1 it takes approximately 200us */
+			usleep_range(200, 250);
+			deadline = jiffies + usecs_to_jiffies(200);
+		}
+		if (ret) {
+			dev_err(data->dev, "failed to write command sequence\n");
+			return -EIO;
+		}
+		/* Wait until NVM is ready again */
+		do {
+			ret = regmap_read(data->regmap, BMP580_REG_STATUS, &reg);
+			if (ret) {
+				dev_err(data->dev, "failed to check nvm status\n");
+				reg &= ~BMP580_STATUS_NVM_RDY_MASK;
+			}
+		} while (time_before(jiffies, deadline) && !(reg & BMP580_STATUS_NVM_RDY_MASK));
+
+		if (!(reg & BMP580_STATUS_NVM_RDY_MASK)) {
+			dev_err(data->dev,
+				"reached timeout waiting for nvm operation completion\n");
+			return -ETIMEDOUT;
+		}
+		/* Checks nvm error flags */
+		if ((reg & BMP580_STATUS_NVM_ERR_MASK) || (reg & BMP580_STATUS_NVM_CMD_ERR_MASK)) {
+			dev_err(data->dev, "error processing nvm operation\n");
+			return -EIO;
+		}
+		break;
+	case BMP580_EXT_MODE_CMD:
+		ret = regmap_write(data->regmap, BMP580_REG_CMD, BMP580_CMD_EXTMODE_SEQ_0);
+		if (ret) {
+			dev_err(data->dev, "failed to send ext_mode first sequence\n");
+			return ret;
+		}
+		ret = regmap_write(data->regmap, BMP580_REG_CMD, BMP580_CMD_EXTMODE_SEQ_1);
+		if (ret) {
+			dev_err(data->dev, "failed to send ext_mode second sequence\n");
+			return ret;
+		}
+		ret = regmap_write(data->regmap, BMP580_REG_CMD, BMP580_CMD_EXTMODE_SEQ_2);
+		if (ret) {
+			dev_err(data->dev, "failed to send ext_mode second sequence\n");
+			return ret;
+		}
+		break;
+	}
+
+	return 0;
+}
+
+/*
+ * Contrary to previous sensors families, compensation algorithm is builtin.
+ * We are only required to read the register raw data and adapt the ranges
+ * for what is expected on IIO ABI.
+ */
+
+static int bmp580_read_temp(struct bmp280_data *data, int *val)
+{
+	s32 raw_temp;
+	int ret;
+
+	ret = regmap_bulk_read(data->regmap, BMP580_REG_TEMP_XLSB, data->buf,
+			       sizeof(data->buf));
+	if (ret) {
+		dev_err(data->dev, "failed to read temperature\n");
+		return ret;
+	}
+
+	raw_temp = get_unaligned_le24(data->buf);
+	if (raw_temp == BMP580_TEMP_SKIPPED) {
+		dev_err(data->dev, "reading temperature skipped\n");
+		return -EIO;
+	}
+
+	/*
+	 * Temperature is returned in Celsius degrees in fractional
+	 * form down 2^16. We reescale by x1000 to return milli Celsius
+	 * to respect IIO ABI.
+	 */
+	*val = (raw_temp * 1000) >> 16;
+	return IIO_VAL_INT;
+}
+
+static int bmp580_read_press(struct bmp280_data *data, int *val, int *val2)
+{
+	u32 raw_press;
+	int ret;
+
+	ret = regmap_bulk_read(data->regmap, BMP580_REG_PRESS_XLSB, data->buf,
+			       sizeof(data->buf));
+	if (ret) {
+		dev_err(data->dev, "failed to read pressure\n");
+		return ret;
+	}
+
+	raw_press = get_unaligned_le24(data->buf);
+	if (raw_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 reescale /1000 to convert to kilopascal to respect IIO ABI.
+	 */
+	*val = raw_press;
+	*val2 = 64000; // 2^6 * 1000
+	return IIO_VAL_FRACTIONAL;
+}
+
+static const int bmp580_odr_table[][2] = {
+	[BMP580_ODR_240HZ] =	{240, 0},
+	[BMP580_ODR_218HZ] =	{218, 0},
+	[BMP580_ODR_199HZ] =	{199, 0},
+	[BMP580_ODR_179HZ] =	{179, 0},
+	[BMP580_ODR_160HZ] =	{160, 0},
+	[BMP580_ODR_149HZ] =	{149, 0},
+	[BMP580_ODR_140HZ] =	{140, 0},
+	[BMP580_ODR_129HZ] =	{129, 0},
+	[BMP580_ODR_120HZ] =	{120, 0},
+	[BMP580_ODR_110HZ] =	{110, 0},
+	[BMP580_ODR_100HZ] =	{100, 0},
+	[BMP580_ODR_89HZ] =	{89, 0},
+	[BMP580_ODR_80HZ] =	{80, 0},
+	[BMP580_ODR_70HZ] =	{70, 0},
+	[BMP580_ODR_60HZ] =	{60, 0},
+	[BMP580_ODR_50HZ] =	{50, 0},
+	[BMP580_ODR_45HZ] =	{45, 0},
+	[BMP580_ODR_40HZ] =	{40, 0},
+	[BMP580_ODR_35HZ] =	{35, 0},
+	[BMP580_ODR_30HZ] =	{30, 0},
+	[BMP580_ODR_25HZ] =	{25, 0},
+	[BMP580_ODR_20HZ] =	{20, 0},
+	[BMP580_ODR_15HZ] =	{15, 0},
+	[BMP580_ODR_10HZ] =	{10, 0},
+	[BMP580_ODR_5HZ] =	{5, 0},
+	[BMP580_ODR_4HZ] =	{4, 0},
+	[BMP580_ODR_3HZ] =	{3, 0},
+	[BMP580_ODR_2HZ] =	{2, 0},
+	[BMP580_ODR_1HZ] =	{1, 0},
+	[BMP580_ODR_0_5HZ] =	{0, 500000},
+	[BMP580_ODR_0_25HZ] =	{0, 250000},
+	[BMP580_ODR_0_125HZ] =	{0, 125000},
+};
+
+static int bmp580_preinit(struct bmp280_data *data)
+{
+	unsigned int reg;
+	int ret;
+
+	/* Issue soft-reset command */
+	ret = bmp580_cmd(data, BMP580_SOFT_RESET_CMD);
+	if (ret)
+		return ret;
+	/* Post powerup sequence */
+	ret = regmap_read(data->regmap, BMP580_REG_CHIP_ID, &reg);
+	if (ret)
+		return ret;
+	if (reg != BMP580_CHIP_ID) {
+		dev_err(data->dev, "preinit: unexpected chip_id\n");
+		return -EINVAL;
+	}
+	ret = regmap_read(data->regmap, BMP580_REG_STATUS, &reg);
+	if (ret)
+		return ret;
+	/* Check nvm status */
+	if (!(reg & BMP580_STATUS_NVM_RDY_MASK) || (reg & BMP580_STATUS_NVM_ERR_MASK)) {
+		dev_err(data->dev, "preinit: nvm error on powerup sequence\n");
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int bmp580_chip_config(struct bmp280_data *data)
+{
+	bool change = false, aux;
+	unsigned int tmp;
+	u8 reg_val;
+	int ret;
+
+	/* Sets sensor in standby mode */
+	ret = regmap_update_bits(data->regmap, BMP580_REG_ODR_CONFIG,
+				 BMP580_MODE_MASK | BMP580_ODR_DEEPSLEEP_DIS,
+				 BMP580_ODR_DEEPSLEEP_DIS |
+				 FIELD_PREP(BMP580_MODE_MASK, BMP580_MODE_SLEEP));
+	if (ret) {
+		dev_err(data->dev, "failed to change sensor to standby mode\n");
+		return ret;
+	}
+	/* From datasheet's table 4: electrical characteristics */
+	usleep_range(2500, 3000);
+
+	/* Set default DSP mode settings */
+	reg_val = FIELD_PREP(BMP580_DSP_COMP_MASK, BMP580_DSP_PRESS_TEMP_COMP_EN) |
+		  BMP580_DSP_SHDW_IIR_TEMP_EN | BMP580_DSP_SHDW_IIR_PRESS_EN;
+
+	ret = regmap_update_bits(data->regmap, BMP580_REG_DSP_CONFIG,
+				 BMP580_DSP_COMP_MASK |
+				 BMP580_DSP_SHDW_IIR_TEMP_EN |
+				 BMP580_DSP_SHDW_IIR_PRESS_EN, reg_val);
+
+	/* Configure oversampling */
+	reg_val = FIELD_PREP(BMP580_OSR_TEMP_MASK, data->oversampling_temp) |
+		  FIELD_PREP(BMP580_OSR_PRESS_MASK, data->oversampling_press) |
+		  BMP580_OSR_PRESS_EN;
+
+	ret = regmap_update_bits_check(data->regmap, BMP580_REG_OSR_CONFIG,
+				       BMP580_OSR_TEMP_MASK | BMP580_OSR_PRESS_MASK |
+				       BMP580_OSR_PRESS_EN,
+				       reg_val, &aux);
+	if (ret) {
+		dev_err(data->dev, "failed to write oversampling register\n");
+		return ret;
+	}
+	change = change || aux;
+
+	/* Configure output data rate */
+	ret = regmap_update_bits_check(data->regmap, BMP580_REG_ODR_CONFIG, BMP580_ODR_MASK,
+				       FIELD_PREP(BMP580_ODR_MASK, data->sampling_freq),
+				       &aux);
+	if (ret) {
+		dev_err(data->dev, "failed to write ODR configuration register\n");
+		return ret;
+	}
+	change = change || aux;
+
+	/* Set filter data */
+	reg_val = FIELD_PREP(BMP580_DSP_IIR_PRESS_MASK, data->iir_filter_coeff) |
+		  FIELD_PREP(BMP580_DSP_IIR_TEMP_MASK, data->iir_filter_coeff);
+
+	ret = regmap_update_bits_check(data->regmap, BMP580_REG_DSP_IIR,
+				       BMP580_DSP_IIR_PRESS_MASK |
+				       BMP580_DSP_IIR_TEMP_MASK,
+				       reg_val, &aux);
+	if (ret) {
+		dev_err(data->dev, "failed to write config register\n");
+		return ret;
+	}
+	change = change || aux;
+
+	/* Restore sensor to normal operation mode */
+	ret = regmap_write_bits(data->regmap, BMP580_REG_ODR_CONFIG,
+				BMP580_MODE_MASK,
+				FIELD_PREP(BMP580_MODE_MASK, BMP580_MODE_NORMAL));
+	if (ret) {
+		dev_err(data->dev, "failed to set normal mode\n");
+		return ret;
+	}
+	/* From datasheet's table 4: electrical characteristics */
+	usleep_range(3000, 3500);
+
+	if (change) {
+		/*
+		 * Check if ODR and OSR settings are valid or we are
+		 * operating in a degraded mode.
+		 */
+		ret = regmap_read(data->regmap, BMP580_REG_EFF_OSR, &tmp);
+		if (ret) {
+			dev_err(data->dev, "error reading effective OSR register\n");
+			return ret;
+		}
+		if (!(tmp & BMP580_EFF_OSR_VALID_ODR)) {
+			dev_warn(data->dev, "OSR and ODR incompatible settings detected\n");
+			/* Set current OSR settings from data on effective OSR */
+			data->oversampling_temp = FIELD_GET(BMP580_EFF_OSR_TEMP_MASK, tmp);
+			data->oversampling_press = FIELD_GET(BMP580_EFF_OSR_PRESS_MASK, tmp);
+			return -EINVAL;
+		}
+	}
+
+	return 0;
+}
+
+static const int bmp580_oversampling_avail[] = { 1, 2, 4, 8, 16, 32, 64, 128 };
+static const int bmp580_iir_filter_coeffs_avail[] = { 1, 2, 4, 8, 16, 32, 64, 128 };
+
+static const struct bmp280_chip_info bmp580_chip_info = {
+	.id_reg = BMP580_REG_CHIP_ID,
+	.chip_id = BMP580_CHIP_ID,
+	.start_up_time = 2000,
+	.channels = bmp380_channels,
+	.num_channels = 2,
+
+	.oversampling_temp_avail = bmp580_oversampling_avail,
+	.num_oversampling_temp_avail = ARRAY_SIZE(bmp580_oversampling_avail),
+	.oversampling_temp_default = ilog2(1),
+
+	.oversampling_press_avail = bmp580_oversampling_avail,
+	.num_oversampling_press_avail = ARRAY_SIZE(bmp580_oversampling_avail),
+	.oversampling_press_default = ilog2(4),
+
+	.sampling_freq_avail = bmp580_odr_table,
+	.num_sampling_freq_avail = ARRAY_SIZE(bmp580_odr_table) * 2,
+	.sampling_freq_default = BMP580_ODR_50HZ,
+
+	.iir_filter_coeffs_avail = bmp580_iir_filter_coeffs_avail,
+	.num_iir_filter_coeffs_avail = ARRAY_SIZE(bmp580_iir_filter_coeffs_avail),
+	.iir_filter_coeff_default = 2,
+
+	.chip_config = bmp580_chip_config,
+	.read_temp = bmp580_read_temp,
+	.read_press = bmp580_read_press,
+	.read_calib = NULL,
+	.preinit = bmp580_preinit,
+};
+
 static int bmp180_measure(struct bmp280_data *data, u8 ctrl_meas)
 {
 	const int conversion_time_max[] = { 4500, 7500, 13500, 25500 };
@@ -1713,6 +2142,9 @@ int bmp280_common_probe(struct device *dev,
 	case BMP380:
 		chip_info = &bmp380_chip_info;
 		break;
+	case BMP580:
+		chip_info = &bmp580_chip_info;
+		break;
 	default:
 		return -EINVAL;
 	}
@@ -1779,9 +2211,10 @@ int bmp280_common_probe(struct device *dev,
 	 */
 	if (data->chip_info->preinit) {
 		ret = data->chip_info->preinit(data);
-		dev_err(dev, "error running preinit tasks");
-		if (ret < 0)
+		if (ret) {
+			dev_err(dev, "error running preinit tasks\n");
 			return ret;
+		}
 	}
 
 	ret = data->chip_info->chip_config(data);
@@ -1795,11 +2228,12 @@ int bmp280_common_probe(struct device *dev,
 	 * non-volatile memory during production". Let's read them out at probe
 	 * time once. They will not change.
 	 */
-
-	ret = data->chip_info->read_calib(data);
-	if (ret < 0)
-		return dev_err_probe(data->dev, ret,
-				     "failed to read calibration coefficients\n");
+	if (data->chip_info->read_calib) {
+		ret = data->chip_info->read_calib(data);
+		if (ret < 0)
+			return dev_err_probe(data->dev, ret,
+					     "failed to read calibration coefficients\n");
+	}
 
 	/*
 	 * Attempt to grab an optional EOC IRQ - only the BMP085 has this
diff --git a/drivers/iio/pressure/bmp280-i2c.c b/drivers/iio/pressure/bmp280-i2c.c
index 59921e8cd592..c52d2b477bb7 100644
--- a/drivers/iio/pressure/bmp280-i2c.c
+++ b/drivers/iio/pressure/bmp280-i2c.c
@@ -22,6 +22,9 @@ static int bmp280_i2c_probe(struct i2c_client *client)
 	case BMP380:
 		regmap_config = &bmp380_regmap_config;
 		break;
+	case BMP580:
+		regmap_config = &bmp580_regmap_config;
+		break;
 	default:
 		return -EINVAL;
 	}
@@ -45,6 +48,7 @@ static const struct of_device_id bmp280_of_i2c_match[] = {
 	{ .compatible = "bosch,bmp280", .data = (void *)BMP280 },
 	{ .compatible = "bosch,bme280", .data = (void *)BME280 },
 	{ .compatible = "bosch,bmp380", .data = (void *)BMP380 },
+	{ .compatible = "bosch,bmp580", .data = (void *)BMP580 },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, bmp280_of_i2c_match);
@@ -55,6 +59,7 @@ static const struct i2c_device_id bmp280_i2c_id[] = {
 	{"bmp280", BMP280 },
 	{"bme280", BME280 },
 	{"bmp380", BMP380 },
+	{"bmp580", BMP580 },
 	{ },
 };
 MODULE_DEVICE_TABLE(i2c, bmp280_i2c_id);
diff --git a/drivers/iio/pressure/bmp280-regmap.c b/drivers/iio/pressure/bmp280-regmap.c
index c98c67970265..3ee56720428c 100644
--- a/drivers/iio/pressure/bmp280-regmap.c
+++ b/drivers/iio/pressure/bmp280-regmap.c
@@ -115,6 +115,54 @@ static bool bmp380_is_volatile_reg(struct device *dev, unsigned int reg)
 	}
 }
 
+static bool bmp580_is_writeable_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case BMP580_REG_NVM_DATA_MSB:
+	case BMP580_REG_NVM_DATA_LSB:
+	case BMP580_REG_NVM_ADDR:
+	case BMP580_REG_ODR_CONFIG:
+	case BMP580_REG_OSR_CONFIG:
+	case BMP580_REG_INT_SOURCE:
+	case BMP580_REG_INT_CONFIG:
+	case BMP580_REG_OOR_THR_MSB:
+	case BMP580_REG_OOR_THR_LSB:
+	case BMP580_REG_OOR_CONFIG:
+	case BMP580_REG_OOR_RANGE:
+	case BMP580_REG_IF_CONFIG:
+	case BMP580_REG_FIFO_CONFIG:
+	case BMP580_REG_FIFO_SEL:
+	case BMP580_REG_DSP_CONFIG:
+	case BMP580_REG_DSP_IIR:
+	case BMP580_REG_CMD:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool bmp580_is_volatile_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case BMP580_REG_NVM_DATA_MSB:
+	case BMP580_REG_NVM_DATA_LSB:
+	case BMP580_REG_FIFO_COUNT:
+	case BMP580_REG_INT_STATUS:
+	case BMP580_REG_PRESS_XLSB:
+	case BMP580_REG_PRESS_LSB:
+	case BMP580_REG_PRESS_MSB:
+	case BMP580_REG_FIFO_DATA:
+	case BMP580_REG_TEMP_XLSB:
+	case BMP580_REG_TEMP_LSB:
+	case BMP580_REG_TEMP_MSB:
+	case BMP580_REG_EFF_OSR:
+	case BMP580_REG_STATUS:
+		return true;
+	default:
+		return false;
+	}
+}
+
 const struct regmap_config bmp280_regmap_config = {
 	.reg_bits = 8,
 	.val_bits = 8,
@@ -138,3 +186,15 @@ const struct regmap_config bmp380_regmap_config = {
 	.volatile_reg = bmp380_is_volatile_reg,
 };
 EXPORT_SYMBOL_NS(bmp380_regmap_config, IIO_BMP280);
+
+const struct regmap_config bmp580_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+
+	.max_register = BMP580_REG_CMD,
+	.cache_type = REGCACHE_RBTREE,
+
+	.writeable_reg = bmp580_is_writeable_reg,
+	.volatile_reg = bmp580_is_volatile_reg,
+};
+EXPORT_SYMBOL_NS(bmp580_regmap_config, IIO_BMP280);
diff --git a/drivers/iio/pressure/bmp280-spi.c b/drivers/iio/pressure/bmp280-spi.c
index 4a2df5b5d838..5653c3c33081 100644
--- a/drivers/iio/pressure/bmp280-spi.c
+++ b/drivers/iio/pressure/bmp280-spi.c
@@ -69,6 +69,9 @@ static int bmp280_spi_probe(struct spi_device *spi)
 	case BMP380:
 		regmap_config = &bmp380_regmap_config;
 		break;
+	case BMP580:
+		regmap_config = &bmp580_regmap_config;
+		break;
 	default:
 		return -EINVAL;
 	}
@@ -96,6 +99,7 @@ static const struct of_device_id bmp280_of_spi_match[] = {
 	{ .compatible = "bosch,bmp280", },
 	{ .compatible = "bosch,bme280", },
 	{ .compatible = "bosch,bmp380", },
+	{ .compatible = "bosch,bmp580", },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, bmp280_of_spi_match);
@@ -106,6 +110,7 @@ static const struct spi_device_id bmp280_spi_id[] = {
 	{ "bmp280", BMP280 },
 	{ "bme280", BME280 },
 	{ "bmp380", BMP380 },
+	{ "bmp580", BMP580 },
 	{ }
 };
 MODULE_DEVICE_TABLE(spi, bmp280_spi_id);
diff --git a/drivers/iio/pressure/bmp280.h b/drivers/iio/pressure/bmp280.h
index efc31bc84708..27d2abc17d01 100644
--- a/drivers/iio/pressure/bmp280.h
+++ b/drivers/iio/pressure/bmp280.h
@@ -3,6 +3,107 @@
 #include <linux/device.h>
 #include <linux/regmap.h>
 
+/* BMP580 specific registers */
+#define BMP580_REG_CMD			0x7E
+#define BMP580_REG_EFF_OSR		0x38
+#define BMP580_REG_ODR_CONFIG		0x37
+#define BMP580_REG_OSR_CONFIG		0x36
+#define BMP580_REG_IF_CONFIG		0x13
+#define BMP580_REG_REV_ID		0x02
+#define BMP580_REG_CHIP_ID		0x01
+/* OOR allows to configure a pressure alarm */
+#define BMP580_REG_OOR_CONFIG		0x35
+#define BMP580_REG_OOR_RANGE		0x34
+#define BMP580_REG_OOR_THR_MSB		0x33
+#define BMP580_REG_OOR_THR_LSB		0x32
+/* DSP registers (IIR filters) */
+#define BMP580_REG_DSP_IIR		0x31
+#define BMP580_REG_DSP_CONFIG		0x30
+/* NVM access registers */
+#define BMP580_REG_NVM_DATA_MSB		0x2D
+#define BMP580_REG_NVM_DATA_LSB		0x2C
+#define BMP580_REG_NVM_ADDR		0x2B
+/* Status registers */
+#define BMP580_REG_STATUS		0x28
+#define BMP580_REG_INT_STATUS		0x27
+#define BMP580_REG_CHIP_STATUS		0x11
+/* Data registers */
+#define BMP580_REG_FIFO_DATA		0x29
+#define BMP580_REG_PRESS_MSB		0x22
+#define BMP580_REG_PRESS_LSB		0x21
+#define BMP580_REG_PRESS_XLSB		0x20
+#define BMP580_REG_TEMP_MSB		0x1F
+#define BMP580_REG_TEMP_LSB		0x1E
+#define BMP580_REG_TEMP_XLSB		0x1D
+/* FIFO config registers */
+#define BMP580_REG_FIFO_SEL		0x18
+#define BMP580_REG_FIFO_COUNT		0x17
+#define BMP580_REG_FIFO_CONFIG		0x16
+/* Interruptions config registers */
+#define BMP580_REG_INT_SOURCE		0x15
+#define BMP580_REG_INT_CONFIG		0x14
+
+#define BMP580_CMD_NOOP			0x00
+#define BMP580_CMD_EXTMODE_SEQ_0	0x73
+#define BMP580_CMD_EXTMODE_SEQ_1	0xB4
+#define BMP580_CMD_EXTMODE_SEQ_2	0x69
+#define BMP580_CMD_NVM_OP_SEQ_0		0x5D
+#define BMP580_CMD_NVM_READ_SEQ_1	0xA5
+#define BMP580_CMD_NVM_WRITE_SEQ_1	0xA0
+#define BMP580_CMD_SOFT_RESET		0xB6
+
+#define BMP580_INT_STATUS_POR_MASK	BIT(4)
+
+#define BMP580_STATUS_CORE_RDY_MASK	BIT(0)
+#define BMP580_STATUS_NVM_RDY_MASK	BIT(1)
+#define BMP580_STATUS_NVM_ERR_MASK	BIT(2)
+#define BMP580_STATUS_NVM_CMD_ERR_MASK	BIT(3)
+
+#define BMP580_OSR_PRESS_MASK		GENMASK(5, 3)
+#define BMP580_OSR_TEMP_MASK		GENMASK(2, 0)
+#define BMP580_OSR_PRESS_EN		BIT(6)
+#define BMP580_EFF_OSR_PRESS_MASK	GENMASK(5, 3)
+#define BMP580_EFF_OSR_TEMP_MASK	GENMASK(2, 0)
+#define BMP580_EFF_OSR_VALID_ODR	BIT(7)
+
+#define BMP580_ODR_MASK			GENMASK(6, 2)
+#define BMP580_MODE_MASK		GENMASK(1, 0)
+#define BMP580_MODE_SLEEP		0
+#define BMP580_MODE_NORMAL		1
+#define BMP580_MODE_FORCED		2
+#define BMP580_MODE_CONTINOUS		3
+#define BMP580_ODR_DEEPSLEEP_DIS	BIT(7)
+
+#define BMP580_DSP_COMP_MASK		GENMASK(1, 0)
+#define BMP580_DSP_COMP_DIS		0
+#define BMP580_DSP_TEMP_COMP_EN		1
+/*
+ * In section 7.27 of datasheet, modes 2 and 3 are technically the same.
+ * Pressure compensation means also enabling temperature compensation
+ */
+#define BMP580_DSP_PRESS_COMP_EN	2
+#define BMP580_DSP_PRESS_TEMP_COMP_EN	3
+#define BMP580_DSP_IIR_FORCED_FLUSH	BIT(2)
+#define BMP580_DSP_SHDW_IIR_TEMP_EN	BIT(3)
+#define BMP580_DSP_FIFO_IIR_TEMP_EN	BIT(4)
+#define BMP580_DSP_SHDW_IIR_PRESS_EN	BIT(5)
+#define BMP580_DSP_FIFO_IIR_PRESS_EN	BIT(6)
+#define BMP580_DSP_OOR_IIR_PRESS_EN	BIT(7)
+
+#define BMP580_DSP_IIR_PRESS_MASK	GENMASK(5, 3)
+#define BMP580_DSP_IIR_TEMP_MASK	GENMASK(2, 0)
+#define BMP580_FILTER_OFF		0
+#define BMP580_FILTER_1X		1
+#define BMP580_FILTER_3X		2
+#define BMP580_FILTER_7X		3
+#define BMP580_FILTER_15X		4
+#define BMP580_FILTER_31X		5
+#define BMP580_FILTER_63X		6
+#define BMP580_FILTER_127X		7
+
+#define BMP580_TEMP_SKIPPED		0x7f7f7f
+#define BMP580_PRESS_SKIPPED		0x7f7f7f
+
 /* BMP380 specific registers */
 #define BMP380_REG_CMD			0x7E
 #define BMP380_REG_CONFIG		0x1F
@@ -180,6 +281,7 @@
 #define BMP280_REG_RESET		0xE0
 #define BMP280_REG_ID			0xD0
 
+#define BMP580_CHIP_ID			0x50
 #define BMP380_CHIP_ID			0x50
 #define BMP180_CHIP_ID			0x55
 #define BMP280_CHIP_ID			0x58
@@ -197,12 +299,14 @@ enum bmp280_variant {
 	BMP280,
 	BME280,
 	BMP380,
+	BMP580,
 };
 
 /* Regmap configurations */
 extern const struct regmap_config bmp180_regmap_config;
 extern const struct regmap_config bmp280_regmap_config;
 extern const struct regmap_config bmp380_regmap_config;
+extern const struct regmap_config bmp580_regmap_config;
 
 /* Probe called from different transports */
 int bmp280_common_probe(struct device *dev,
-- 
2.39.0

Powered by blists - more mailing lists