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Message-Id: <7392796d1bc63d58f7a19d209a86c8e0de84a763.1674954271.git.ang.iglesiasg@gmail.com>
Date: Sun, 29 Jan 2023 02:33:03 +0100
From: Angel Iglesias <ang.iglesiasg@...il.com>
To: linux-iio@...r.kernel.org
Cc: Angel Iglesias <ang.iglesiasg@...il.com>,
Andy Shevchenko <andriy.shevchenko@...ux.intel.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>,
Andreas Klinger <ak@...klinger.de>, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH v3 1/7] iio: pressure: bmp280: Use chip_info pointers for each chip as driver data
Refactor driver I2C and SPI implementations using pointers for each
variant's chip_info as the driver data. Adds the regmap configuration
to the chip_info struct.
Suggested-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Suggested-by: Jonathan Cameron <jic23@...nel.org>
Signed-off-by: Angel Iglesias <ang.iglesiasg@...il.com>
diff --git a/drivers/iio/pressure/bmp280-core.c b/drivers/iio/pressure/bmp280-core.c
index c0aff78489b4..2c8773db4b73 100644
--- a/drivers/iio/pressure/bmp280-core.c
+++ b/drivers/iio/pressure/bmp280-core.c
@@ -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;
}
diff --git a/drivers/iio/pressure/bmp280-i2c.c b/drivers/iio/pressure/bmp280-i2c.c
index 14eab086d24a..5f908e2c9826 100644
--- a/drivers/iio/pressure/bmp280-i2c.c
+++ b/drivers/iio/pressure/bmp280-i2c.c
@@ -8,25 +8,14 @@
static int bmp280_i2c_probe(struct i2c_client *client)
{
struct regmap *regmap;
- const struct regmap_config *regmap_config;
+ const struct bmp280_chip_info *chip_info;
const struct i2c_device_id *id = i2c_client_get_device_id(client);
- switch (id->driver_data) {
- case BMP180_CHIP_ID:
- regmap_config = &bmp180_regmap_config;
- break;
- case BMP280_CHIP_ID:
- case BME280_CHIP_ID:
- regmap_config = &bmp280_regmap_config;
- break;
- case BMP380_CHIP_ID:
- regmap_config = &bmp380_regmap_config;
- break;
- default:
- return -EINVAL;
- }
+ chip_info = device_get_match_data(&client->dev);
+ if (!chip_info)
+ chip_info = (const struct bmp280_chip_info *) id->driver_data;
- regmap = devm_regmap_init_i2c(client, regmap_config);
+ regmap = devm_regmap_init_i2c(client, chip_info->regmap_config);
if (IS_ERR(regmap)) {
dev_err(&client->dev, "failed to allocate register map\n");
return PTR_ERR(regmap);
@@ -34,27 +23,27 @@ static int bmp280_i2c_probe(struct i2c_client *client)
return bmp280_common_probe(&client->dev,
regmap,
- id->driver_data,
+ chip_info,
id->name,
client->irq);
}
static const struct of_device_id bmp280_of_i2c_match[] = {
- { .compatible = "bosch,bmp085", .data = (void *)BMP180_CHIP_ID },
- { .compatible = "bosch,bmp180", .data = (void *)BMP180_CHIP_ID },
- { .compatible = "bosch,bmp280", .data = (void *)BMP280_CHIP_ID },
- { .compatible = "bosch,bme280", .data = (void *)BME280_CHIP_ID },
- { .compatible = "bosch,bmp380", .data = (void *)BMP380_CHIP_ID },
+ { .compatible = "bosch,bmp085", .data = &bmp180_chip_info },
+ { .compatible = "bosch,bmp180", .data = &bmp180_chip_info },
+ { .compatible = "bosch,bmp280", .data = &bmp280_chip_info },
+ { .compatible = "bosch,bme280", .data = &bme280_chip_info },
+ { .compatible = "bosch,bmp380", .data = &bmp380_chip_info },
{ },
};
MODULE_DEVICE_TABLE(of, bmp280_of_i2c_match);
static const struct i2c_device_id bmp280_i2c_id[] = {
- {"bmp085", BMP180_CHIP_ID },
- {"bmp180", BMP180_CHIP_ID },
- {"bmp280", BMP280_CHIP_ID },
- {"bme280", BME280_CHIP_ID },
- {"bmp380", BMP380_CHIP_ID },
+ {"bmp085", (kernel_ulong_t)&bmp180_chip_info },
+ {"bmp180", (kernel_ulong_t)&bmp180_chip_info },
+ {"bmp280", (kernel_ulong_t)&bmp280_chip_info },
+ {"bme280", (kernel_ulong_t)&bme280_chip_info },
+ {"bmp380", (kernel_ulong_t)&bmp380_chip_info },
{ },
};
MODULE_DEVICE_TABLE(i2c, bmp280_i2c_id);
diff --git a/drivers/iio/pressure/bmp280-spi.c b/drivers/iio/pressure/bmp280-spi.c
index 011c68e07ebf..d5a224b95185 100644
--- a/drivers/iio/pressure/bmp280-spi.c
+++ b/drivers/iio/pressure/bmp280-spi.c
@@ -47,8 +47,8 @@ static struct regmap_bus bmp280_regmap_bus = {
static int bmp280_spi_probe(struct spi_device *spi)
{
const struct spi_device_id *id = spi_get_device_id(spi);
+ const struct bmp280_chip_info *chip_info;
struct regmap *regmap;
- const struct regmap_config *regmap_config;
int ret;
spi->bits_per_word = 8;
@@ -58,25 +58,14 @@ static int bmp280_spi_probe(struct spi_device *spi)
return ret;
}
- switch (id->driver_data) {
- case BMP180_CHIP_ID:
- regmap_config = &bmp180_regmap_config;
- break;
- case BMP280_CHIP_ID:
- case BME280_CHIP_ID:
- regmap_config = &bmp280_regmap_config;
- break;
- case BMP380_CHIP_ID:
- regmap_config = &bmp380_regmap_config;
- break;
- default:
- return -EINVAL;
- }
+ chip_info = device_get_match_data(&spi->dev);
+ if (!chip_info)
+ chip_info = (const struct bmp280_chip_info *) id->driver_data;
regmap = devm_regmap_init(&spi->dev,
&bmp280_regmap_bus,
&spi->dev,
- regmap_config);
+ chip_info->regmap_config);
if (IS_ERR(regmap)) {
dev_err(&spi->dev, "failed to allocate register map\n");
return PTR_ERR(regmap);
@@ -84,28 +73,28 @@ static int bmp280_spi_probe(struct spi_device *spi)
return bmp280_common_probe(&spi->dev,
regmap,
- id->driver_data,
+ chip_info,
id->name,
spi->irq);
}
static const struct of_device_id bmp280_of_spi_match[] = {
- { .compatible = "bosch,bmp085", },
- { .compatible = "bosch,bmp180", },
- { .compatible = "bosch,bmp181", },
- { .compatible = "bosch,bmp280", },
- { .compatible = "bosch,bme280", },
- { .compatible = "bosch,bmp380", },
+ { .compatible = "bosch,bmp085", .data = &bmp180_chip_info },
+ { .compatible = "bosch,bmp180", .data = &bmp180_chip_info },
+ { .compatible = "bosch,bmp181", .data = &bmp180_chip_info },
+ { .compatible = "bosch,bmp280", .data = &bmp280_chip_info },
+ { .compatible = "bosch,bme280", .data = &bmp280_chip_info },
+ { .compatible = "bosch,bmp380", .data = &bmp380_chip_info },
{ },
};
MODULE_DEVICE_TABLE(of, bmp280_of_spi_match);
static const struct spi_device_id bmp280_spi_id[] = {
- { "bmp180", BMP180_CHIP_ID },
- { "bmp181", BMP180_CHIP_ID },
- { "bmp280", BMP280_CHIP_ID },
- { "bme280", BME280_CHIP_ID },
- { "bmp380", BMP380_CHIP_ID },
+ { "bmp180", (kernel_ulong_t)&bmp180_chip_info },
+ { "bmp181", (kernel_ulong_t)&bmp180_chip_info },
+ { "bmp280", (kernel_ulong_t)&bmp280_chip_info },
+ { "bme280", (kernel_ulong_t)&bmp280_chip_info },
+ { "bmp380", (kernel_ulong_t)&bmp380_chip_info },
{ }
};
MODULE_DEVICE_TABLE(spi, bmp280_spi_id);
diff --git a/drivers/iio/pressure/bmp280.h b/drivers/iio/pressure/bmp280.h
index c791325c7416..387723fd0772 100644
--- a/drivers/iio/pressure/bmp280.h
+++ b/drivers/iio/pressure/bmp280.h
@@ -1,7 +1,10 @@
/* SPDX-License-Identifier: GPL-2.0 */
#include <linux/bitops.h>
#include <linux/device.h>
+#include <linux/iio/iio.h>
#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+
/* BMP380 specific registers */
#define BMP380_REG_CMD 0x7E
@@ -191,6 +194,165 @@
#define BMP280_PRESS_SKIPPED 0x80000
#define BMP280_HUMIDITY_SKIPPED 0x8000
+/* Core exported structs */
+
+static const char *const bmp280_supply_names[] = {
+ "vddd", "vdda"
+};
+
+#define BMP280_NUM_SUPPLIES ARRAY_SIZE(bmp280_supply_names)
+
+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;
+};
+
+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 unsigned int chip_id;
+
+ const struct regmap_config *regmap_config;
+
+ 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 *);
+};
+
+/* Chip infos for each variant */
+extern const struct bmp280_chip_info bmp180_chip_info;
+extern const struct bmp280_chip_info bmp280_chip_info;
+extern const struct bmp280_chip_info bme280_chip_info;
+extern const struct bmp280_chip_info bmp380_chip_info;
+
/* Regmap configurations */
extern const struct regmap_config bmp180_regmap_config;
extern const struct regmap_config bmp280_regmap_config;
@@ -199,7 +361,7 @@ extern const struct regmap_config bmp380_regmap_config;
/* Probe called from different transports */
int bmp280_common_probe(struct device *dev,
struct regmap *regmap,
- unsigned int chip,
+ const struct bmp280_chip_info *,
const char *name,
int irq);
--
2.39.1
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