Add support for pressure sensor Bosch BMP580

index c0aff78489b4..2c8773db4b73 100644
@@ -49,65 +49,6 @@
  */
 enum { AC1, AC2, AC3, AC4, AC5, AC6, B1, B2, MB, MC, MD };
 
-struct bmp180_calib {
-	s16 AC1;
-	s16 AC2;
-	s16 AC3;
-	u16 AC4;
-	u16 AC5;
-	u16 AC6;
-	s16 B1;
-	s16 B2;
-	s16 MB;
-	s16 MC;
-	s16 MD;
-};
-
-/* See datasheet Section 4.2.2. */
-struct bmp280_calib {
-	u16 T1;
-	s16 T2;
-	s16 T3;
-	u16 P1;
-	s16 P2;
-	s16 P3;
-	s16 P4;
-	s16 P5;
-	s16 P6;
-	s16 P7;
-	s16 P8;
-	s16 P9;
-	u8  H1;
-	s16 H2;
-	u8  H3;
-	s16 H4;
-	s16 H5;
-	s8  H6;
-};
-
-/* See datasheet Section 3.11.1. */
-struct bmp380_calib {
-	u16 T1;
-	u16 T2;
-	s8  T3;
-	s16 P1;
-	s16 P2;
-	s8  P3;
-	s8  P4;
-	u16 P5;
-	u16 P6;
-	s8  P7;
-	s8  P8;
-	s16 P9;
-	s8  P10;
-	s8  P11;
-};
-
-static const char *const bmp280_supply_names[] = {
-	"vddd", "vdda"
-};
-
-#define BMP280_NUM_SUPPLIES ARRAY_SIZE(bmp280_supply_names)
 
 enum bmp380_odr {
 	BMP380_ODR_200HZ,

@@ -130,94 +71,6 @@ enum bmp380_odr {
 	BMP380_ODR_0_0015HZ,
 };
 
-struct bmp280_data {
-	struct device *dev;
-	struct mutex lock;
-	struct regmap *regmap;
-	struct completion done;
-	bool use_eoc;
-	const struct bmp280_chip_info *chip_info;
-	union {
-		struct bmp180_calib bmp180;
-		struct bmp280_calib bmp280;
-		struct bmp380_calib bmp380;
-	} calib;
-	struct regulator_bulk_data supplies[BMP280_NUM_SUPPLIES];
-	unsigned int start_up_time; /* in microseconds */
-
-	/* log of base 2 of oversampling rate */
-	u8 oversampling_press;
-	u8 oversampling_temp;
-	u8 oversampling_humid;
-	u8 iir_filter_coeff;
-
-	/*
-	 * BMP380 devices introduce sampling frequency configuration. See
-	 * datasheet sections 3.3.3. and 4.3.19 for more details.
-	 *
-	 * BMx280 devices allowed indirect configuration of sampling frequency
-	 * changing the t_standby duration between measurements, as detailed on
-	 * section 3.6.3 of the datasheet.
-	 */
-	int sampling_freq;
-
-	/*
-	 * Carryover value from temperature conversion, used in pressure
-	 * calculation.
-	 */
-	s32 t_fine;
-
-	/*
-	 * DMA (thus cache coherency maintenance) may require the
-	 * transfer buffers to live in their own cache lines.
-	 */
-	union {
-		/* Sensor data buffer */
-		u8 buf[3];
-		/* Calibration data buffers */
-		__le16 bmp280_cal_buf[BMP280_CONTIGUOUS_CALIB_REGS / 2];
-		__be16 bmp180_cal_buf[BMP180_REG_CALIB_COUNT / 2];
-		u8 bmp380_cal_buf[BMP380_CALIB_REG_COUNT];
-		/* Miscellaneous, endianess-aware data buffers */
-		__le16 le16;
-		__be16 be16;
-	} __aligned(IIO_DMA_MINALIGN);
-};
-
-struct bmp280_chip_info {
-	unsigned int id_reg;
-
-	const struct iio_chan_spec *channels;
-	int num_channels;
-	unsigned int start_up_time;
-
-	const int *oversampling_temp_avail;
-	int num_oversampling_temp_avail;
-	int oversampling_temp_default;
-
-	const int *oversampling_press_avail;
-	int num_oversampling_press_avail;
-	int oversampling_press_default;
-
-	const int *oversampling_humid_avail;
-	int num_oversampling_humid_avail;
-	int oversampling_humid_default;
-
-	const int *iir_filter_coeffs_avail;
-	int num_iir_filter_coeffs_avail;
-	int iir_filter_coeff_default;
-
-	const int (*sampling_freq_avail)[2];
-	int num_sampling_freq_avail;
-	int sampling_freq_default;
-
-	int (*chip_config)(struct bmp280_data *);
-	int (*read_temp)(struct bmp280_data *, int *);
-	int (*read_press)(struct bmp280_data *, int *, int *);
-	int (*read_humid)(struct bmp280_data *, int *, int *);
-	int (*read_calib)(struct bmp280_data *);
-};
-
 /*
  * These enums are used for indexing into the array of compensation
  * parameters for BMP280.

@@ -905,8 +758,10 @@ static int bmp280_chip_config(struct bmp280_data *data)
 
 static const int bmp280_oversampling_avail[] = { 1, 2, 4, 8, 16 };
 
-static const struct bmp280_chip_info bmp280_chip_info = {
+const struct bmp280_chip_info bmp280_chip_info = {
 	.id_reg = BMP280_REG_ID,
+	.chip_id = BMP280_CHIP_ID,
+	.regmap_config = &bmp280_regmap_config,
 	.start_up_time = 2000,
 	.channels = bmp280_channels,
 	.num_channels = 2,

@@ -934,6 +789,7 @@ static const struct bmp280_chip_info bmp280_chip_info = {
 	.read_press = bmp280_read_press,
 	.read_calib = bmp280_read_calib,
 };
+EXPORT_SYMBOL_NS(bmp280_chip_info, IIO_BMP280);
 
 static int bme280_chip_config(struct bmp280_data *data)
 {

@@ -953,8 +809,10 @@ static int bme280_chip_config(struct bmp280_data *data)
 	return bmp280_chip_config(data);
 }
 
-static const struct bmp280_chip_info bme280_chip_info = {
+const struct bmp280_chip_info bme280_chip_info = {
 	.id_reg = BMP280_REG_ID,
+	.chip_id = BME280_CHIP_ID,
+	.regmap_config = &bmp280_regmap_config,
 	.start_up_time = 2000,
 	.channels = bmp280_channels,
 	.num_channels = 3,

@@ -977,6 +835,7 @@ static const struct bmp280_chip_info bme280_chip_info = {
 	.read_humid = bmp280_read_humid,
 	.read_calib = bme280_read_calib,
 };
+EXPORT_SYMBOL_NS(bme280_chip_info, IIO_BMP280);
 
 /*
  * Helper function to send a command to BMP3XX sensors.

@@ -1319,8 +1178,10 @@ static int bmp380_chip_config(struct bmp280_data *data)
 static const int bmp380_oversampling_avail[] = { 1, 2, 4, 8, 16, 32 };
 static const int bmp380_iir_filter_coeffs_avail[] = { 1, 2, 4, 8, 16, 32, 64, 128};
 
-static const struct bmp280_chip_info bmp380_chip_info = {
+const struct bmp280_chip_info bmp380_chip_info = {
 	.id_reg = BMP380_REG_ID,
+	.chip_id = BMP380_CHIP_ID,
+	.regmap_config = &bmp380_regmap_config,
 	.start_up_time = 2000,
 	.channels = bmp380_channels,
 	.num_channels = 2,

@@ -1346,6 +1207,7 @@ static const struct bmp280_chip_info bmp380_chip_info = {
 	.read_press = bmp380_read_press,
 	.read_calib = bmp380_read_calib,
 };
+EXPORT_SYMBOL_NS(bmp380_chip_info, IIO_BMP280);
 
 static int bmp180_measure(struct bmp280_data *data, u8 ctrl_meas)
 {

@@ -1579,8 +1441,10 @@ static int bmp180_chip_config(struct bmp280_data *data)
 static const int bmp180_oversampling_temp_avail[] = { 1 };
 static const int bmp180_oversampling_press_avail[] = { 1, 2, 4, 8 };
 
-static const struct bmp280_chip_info bmp180_chip_info = {
+const struct bmp280_chip_info bmp180_chip_info = {
 	.id_reg = BMP280_REG_ID,
+	.chip_id = BMP180_CHIP_ID,
+	.regmap_config = &bmp180_regmap_config,
 	.start_up_time = 2000,
 	.channels = bmp280_channels,
 	.num_channels = 2,

@@ -1600,6 +1464,7 @@ static const struct bmp280_chip_info bmp180_chip_info = {
 	.read_press = bmp180_read_press,
 	.read_calib = bmp180_read_calib,
 };
+EXPORT_SYMBOL_NS(bmp180_chip_info, IIO_BMP280);
 
 static irqreturn_t bmp085_eoc_irq(int irq, void *d)
 {

@@ -1661,11 +1526,10 @@ static void bmp280_regulators_disable(void *data)
 
 int bmp280_common_probe(struct device *dev,
 			struct regmap *regmap,
-			unsigned int chip,
+			const struct bmp280_chip_info *chip_info,
 			const char *name,
 			int irq)
 {
-	const struct bmp280_chip_info *chip_info;
 	struct iio_dev *indio_dev;
 	struct bmp280_data *data;
 	struct gpio_desc *gpiod;

@@ -1684,22 +1548,6 @@ int bmp280_common_probe(struct device *dev,
 	indio_dev->info = &bmp280_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 
-	switch (chip) {
-	case BMP180_CHIP_ID:
-		chip_info = &bmp180_chip_info;
-		break;
-	case BMP280_CHIP_ID:
-		chip_info = &bmp280_chip_info;
-		break;
-	case BME280_CHIP_ID:
-		chip_info = &bme280_chip_info;
-		break;
-	case BMP380_CHIP_ID:
-		chip_info = &bmp380_chip_info;
-		break;
-	default:
-		return -EINVAL;
-	}
 	data->chip_info = chip_info;
 
 	/* Apply initial values from chip info structure */

@@ -1751,9 +1599,9 @@ int bmp280_common_probe(struct device *dev,
 	ret = regmap_read(regmap, data->chip_info->id_reg, &chip_id);
 	if (ret < 0)
 		return ret;
-	if (chip_id != chip) {
+	if (chip_id != data->chip_info->chip_id) {
 		dev_err(dev, "bad chip id: expected %x got %x\n",
-			chip, chip_id);
+			data->chip_info->chip_id, chip_id);
 		return -EINVAL;
 	}
 

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index 2c8773db4b73..6467034b1d3e 100644
@@ -1076,6 +1076,12 @@ static const int bmp380_odr_table[][2] = {
 	[BMP380_ODR_0_0015HZ]	= {0, 1526},
 };
 
+static int bmp380_preinit(struct bmp280_data *data)
+{
+	/* BMP3xx requires soft-reset as part of initialization */
+	return bmp380_cmd(data, BMP380_CMD_SOFT_RESET);
+}
+
 static int bmp380_chip_config(struct bmp280_data *data)
 {
 	bool change = false, aux;

@@ -1206,6 +1212,7 @@ const struct bmp280_chip_info bmp380_chip_info = {
 	.read_temp = bmp380_read_temp,
 	.read_press = bmp380_read_press,
 	.read_calib = bmp380_read_calib,
+	.preinit = bmp380_preinit,
 };
 EXPORT_SYMBOL_NS(bmp380_chip_info, IIO_BMP280);
 

@@ -1605,11 +1612,11 @@ int bmp280_common_probe(struct device *dev,
 		return -EINVAL;
 	}
 
-	/* BMP3xx requires soft-reset as part of initialization */
-	if (chip_id == BMP380_CHIP_ID) {
-		ret = bmp380_cmd(data, BMP380_CMD_SOFT_RESET);
-		if (ret < 0)
-			return ret;
+	if (data->chip_info->preinit) {
+		ret = data->chip_info->preinit(data);
+		if (ret)
+			return dev_err_probe(data->dev, ret,
+					     "error running preinit tasks\n");
 	}
 
 	ret = data->chip_info->chip_config(data);

index 387723fd0772..be17104ef0a2 100644
@@ -345,6 +345,7 @@ struct bmp280_chip_info {
 	int (*read_press)(struct bmp280_data *, int *, int *);
 	int (*read_humid)(struct bmp280_data *, int *, int *);
 	int (*read_calib)(struct bmp280_data *);
+	int (*preinit)(struct bmp280_data *);
 };
 
 /* Chip infos for each variant */

index 6467034b1d3e..22addaaa5393 100644
@@ -1631,10 +1631,12 @@ int bmp280_common_probe(struct device *dev,
 	 * 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

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index 5f908e2c9826..567b945e6427 100644
@@ -34,6 +34,7 @@ static const struct of_device_id bmp280_of_i2c_match[] = {
 	{ .compatible = "bosch,bmp280", .data = &bmp280_chip_info },
 	{ .compatible = "bosch,bme280", .data = &bme280_chip_info },
 	{ .compatible = "bosch,bmp380", .data = &bmp380_chip_info },
+	{ .compatible = "bosch,bmp580", .data = &bmp580_chip_info },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, bmp280_of_i2c_match);

@@ -44,6 +45,7 @@ static const struct i2c_device_id bmp280_i2c_id[] = {
 	{"bmp280", (kernel_ulong_t)&bmp280_chip_info },
 	{"bme280", (kernel_ulong_t)&bme280_chip_info },
 	{"bmp380", (kernel_ulong_t)&bmp380_chip_info },
+	{"bmp580", (kernel_ulong_t)&bmp580_chip_info },
 	{ },
 };
 MODULE_DEVICE_TABLE(i2c, bmp280_i2c_id);

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index d5a224b95185..1dff9bb7c4e9 100644
@@ -85,6 +85,7 @@ static const struct of_device_id bmp280_of_spi_match[] = {
 	{ .compatible = "bosch,bmp280", .data = &bmp280_chip_info },
 	{ .compatible = "bosch,bme280", .data = &bmp280_chip_info },
 	{ .compatible = "bosch,bmp380", .data = &bmp380_chip_info },
+	{ .compatible = "bosch,bmp580", .data = &bmp580_chip_info },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, bmp280_of_spi_match);

@@ -95,6 +96,7 @@ static const struct spi_device_id bmp280_spi_id[] = {
 	{ "bmp280", (kernel_ulong_t)&bmp280_chip_info },
 	{ "bme280", (kernel_ulong_t)&bmp280_chip_info },
 	{ "bmp380", (kernel_ulong_t)&bmp380_chip_info },
+	{ "bmp580", (kernel_ulong_t)&bmp580_chip_info },
 	{ }
 };
 MODULE_DEVICE_TABLE(spi, bmp280_spi_id);

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index a7d26d81ec08..1e7534d7c4a6 100644
@@ -28,6 +28,7 @@
 #include <linux/bitfield.h>
 #include <linux/device.h>
 #include <linux/module.h>
+#include <linux/nvmem-provider.h>
 #include <linux/regmap.h>
 #include <linux/delay.h>
 #include <linux/iio/iio.h>

@@ -1284,6 +1285,80 @@ static int bmp580_soft_reset(struct bmp280_data *data)
 	return 0;
 }
 
+/**
+ * bmp580_nvm_operation() - Helper function to commit NVM memory operations
+ * @data: sensor data struct
+ * @is_write: flag to signal write operation
+ */
+static int bmp580_nvm_operation(struct bmp280_data *data, bool is_write)
+{
+	unsigned long timeout, poll;
+	unsigned int reg;
+	int ret;
+
+	/* 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;
+	}
+
+	/* Start 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 (is_write) {
+		/* Send NVM 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 */
+		poll = 2000;
+		timeout = 12000;
+	} else {
+		/* Send NVM 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 */
+		poll = 50;
+		timeout = 400;
+	}
+	if (ret) {
+		dev_err(data->dev, "failed to write command sequence\n");
+		return -EIO;
+	}
+
+	/* Wait until NVM is ready again */
+	ret = regmap_read_poll_timeout(data->regmap, BMP580_REG_STATUS, reg,
+				       (reg & BMP580_STATUS_NVM_RDY_MASK),
+				       poll, timeout);
+	if (ret) {
+		dev_err(data->dev, "error checking nvm operation status\n");
+		return ret;
+	}
+
+	/* Check 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;
+	}
+
+	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

@@ -1379,8 +1454,140 @@ static const int bmp580_odr_table[][2] = {
 	[BMP580_ODR_0_125HZ] =	{0, 125000},
 };
 
+const int bmp580_nvmem_addrs[] = { 0x20, 0x21, 0x22 };
+
+static int bmp580_nvmem_read(void *priv, unsigned int offset, void *val,
+			     size_t bytes)
+{
+	struct bmp280_data *data = priv;
+	u16 *dst = val;
+	int ret, addr;
+
+	pm_runtime_get_sync(data->dev);
+	mutex_lock(&data->lock);
+
+	/* Set 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");
+		goto exit;
+	}
+	/* Wait standby transition time */
+	usleep_range(2500, 3000);
+
+	while (bytes >= sizeof(*dst)) {
+		addr = bmp580_nvmem_addrs[offset / sizeof(*dst)];
+
+		ret = regmap_write(data->regmap, BMP580_REG_NVM_ADDR,
+				   FIELD_PREP(BMP580_NVM_ROW_ADDR_MASK, addr));
+		if (ret) {
+			dev_err(data->dev, "error writing nvm address\n");
+			goto exit;
+		}
+
+		ret = bmp580_nvm_operation(data, false);
+		if (ret)
+			goto exit;
+
+		ret = regmap_bulk_read(data->regmap, BMP580_REG_NVM_DATA_LSB, &data->le16,
+				       sizeof(data->le16));
+		if (ret) {
+			dev_err(data->dev, "error reading nvm data regs\n");
+			goto exit;
+		}
+
+		*dst++ = le16_to_cpu(data->le16);
+		bytes -= sizeof(*dst);
+		offset += sizeof(*dst);
+	}
+exit:
+	/* Restore chip config */
+	data->chip_info->chip_config(data);
+	mutex_unlock(&data->lock);
+	pm_runtime_mark_last_busy(data->dev);
+	pm_runtime_put_autosuspend(data->dev);
+	return ret;
+}
+
+static int bmp580_nvmem_write(void *priv, unsigned int offset, void *val,
+			      size_t bytes)
+{
+	struct bmp280_data *data = priv;
+	u16 *buf = val;
+	int ret, addr;
+
+	pm_runtime_get_sync(data->dev);
+	mutex_lock(&data->lock);
+
+	/* Set 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");
+		goto exit;
+	}
+	/* Wait standby transition time */
+	usleep_range(2500, 3000);
+
+	while (bytes >= sizeof(*buf)) {
+		addr = bmp580_nvmem_addrs[offset / sizeof(*buf)];
+
+		ret = regmap_write(data->regmap, BMP580_REG_NVM_ADDR, BMP580_NVM_PROG_EN |
+				   FIELD_PREP(BMP580_NVM_ROW_ADDR_MASK, addr));
+		if (ret) {
+			dev_err(data->dev, "error writing nvm address\n");
+			goto exit;
+		}
+		data->le16 = cpu_to_le16(*buf++);
+
+		ret = regmap_bulk_write(data->regmap, BMP580_REG_NVM_DATA_LSB, &data->le16,
+					sizeof(data->le16));
+		if (ret) {
+			dev_err(data->dev, "error writing LSB NVM data regs\n");
+			goto exit;
+		}
+
+		ret = bmp580_nvm_operation(data, true);
+		if (ret)
+			goto exit;
+
+		/* Disable programming mode bit */
+		ret = regmap_update_bits(data->regmap, BMP580_REG_NVM_ADDR,
+					 BMP580_NVM_PROG_EN, 0);
+		if (ret) {
+			dev_err(data->dev, "error resetting nvm write\n");
+			goto exit;
+		}
+
+		bytes -= sizeof(*buf);
+		offset += sizeof(*buf);
+	}
+exit:
+	/* Restore chip config */
+	data->chip_info->chip_config(data);
+	mutex_unlock(&data->lock);
+	pm_runtime_mark_last_busy(data->dev);
+	pm_runtime_put_autosuspend(data->dev);
+	return ret;
+}
+
 static int bmp580_preinit(struct bmp280_data *data)
 {
+	struct nvmem_config config = {
+		.dev = data->dev,
+		.priv = data,
+		.name = "bmp580_nvmem",
+		.word_size = sizeof(u16),
+		.stride = sizeof(u16),
+		.size = 3 * sizeof(u16),
+		.reg_read = bmp580_nvmem_read,
+		.reg_write = bmp580_nvmem_write,
+	};
 	unsigned int reg;
 	int ret;
 

@@ -1408,7 +1615,8 @@ static int bmp580_preinit(struct bmp280_data *data)
 		return -EIO;
 	}
 
-	return 0;
+	/* Register nvmem device */
+	return PTR_ERR_OR_ZERO(devm_nvmem_register(config.dev, &config));
 }
 
 static int bmp580_chip_config(struct bmp280_data *data)

index cd4c5be36ed7..5c0563ce7572 100644
@@ -104,6 +104,9 @@
 #define BMP580_FILTER_63X		6
 #define BMP580_FILTER_127X		7
 
+#define BMP580_NVM_ROW_ADDR_MASK	GENMASK(5, 0)
+#define BMP580_NVM_PROG_EN		BIT(6)
+
 #define BMP580_TEMP_SKIPPED		0x7f7f7f
 #define BMP580_PRESS_SKIPPED		0x7f7f7f