Re: [PATCH v3 2/6] iio: imu: bmi270: Provide chip info as configuration structure

Jonathan Cameron
2024-10-22T18:44:00Z

On Sun, 20 Oct 2024 15:00:06 -0700
Justin Weiss <justin@justinweiss.com> wrote:

> Prepare the bmi270 driver to support similar devices like the bmi260.
>
> Signed-off-by: Justin Weiss <justin@justinweiss.com>
In the interests of reducing how many patches are in flight I'll
pick this one as well. Can't go beyond this point though until patch 3
gets a DT RB.
> ---
> drivers/iio/imu/bmi270/bmi270.h | 11 ++++++++++-
> drivers/iio/imu/bmi270/bmi270_core.c | 18 ++++++++++++++----
> drivers/iio/imu/bmi270/bmi270_i2c.c | 11 ++++++++---
> drivers/iio/imu/bmi270/bmi270_spi.c | 11 ++++++++---
> 4 files changed, 40 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/iio/imu/bmi270/bmi270.h b/drivers/iio/imu/bmi270/bmi270.h
> index 8ac20ad7ee94..93e5f387607b 100644
> --- a/drivers/iio/imu/bmi270/bmi270.h
> +++ b/drivers/iio/imu/bmi270/bmi270.h
> @@ -10,10 +10,19 @@ struct device;
> struct bmi270_data {
> struct device *dev;
> struct regmap *regmap;
> + const struct bmi270_chip_info *chip_info;
> +};
> +
> +struct bmi270_chip_info {
> + const char *name;
> + int chip_id;
> + const char *fw_name;
> };
>
> extern const struct regmap_config bmi270_regmap_config;
> +extern const struct bmi270_chip_info bmi270_chip_info;
>
> -int bmi270_core_probe(struct device *dev, struct regmap *regmap);
> +int bmi270_core_probe(struct device *dev, struct regmap *regmap,
> + const struct bmi270_chip_info *chip_info);
>
> #endif /* BMI270_H_ */
> diff --git a/drivers/iio/imu/bmi270/bmi270_core.c b/drivers/iio/imu/bmi270/bmi270_core.c
> index e598c642178f..5f08d786fa21 100644
> --- a/drivers/iio/imu/bmi270/bmi270_core.c
> +++ b/drivers/iio/imu/bmi270/bmi270_core.c
> @@ -66,6 +66,13 @@ enum bmi270_scan {
> BMI270_SCAN_GYRO_Z,
> };
>
> +const struct bmi270_chip_info bmi270_chip_info = {
> + .name = "bmi270",
> + .chip_id = BMI270_CHIP_ID_VAL,
> + .fw_name = BMI270_INIT_DATA_FILE,
> +};
> +EXPORT_SYMBOL_NS_GPL(bmi270_chip_info, IIO_BMI270);
> +
> static int bmi270_get_data(struct bmi270_data *bmi270_device,
> int chan_type, int axis, int *val)
> {
> @@ -150,7 +157,7 @@ static int bmi270_validate_chip_id(struct bmi270_data *bmi270_device)
> if (ret)
> return dev_err_probe(dev, ret, "Failed to read chip id");
>
> - if (chip_id != BMI270_CHIP_ID_VAL)
> + if (chip_id != bmi270_device->chip_info->chip_id)
> dev_info(dev, "Unknown chip id 0x%x", chip_id);
>
> return 0;
> @@ -183,7 +190,8 @@ static int bmi270_write_calibration_data(struct bmi270_data *bmi270_device)
> return dev_err_probe(dev, ret,
> "Failed to prepare device to load init data");
>
> - ret = request_firmware(&init_data, BMI270_INIT_DATA_FILE, dev);
> + ret = request_firmware(&init_data,
> + bmi270_device->chip_info->fw_name, dev);
> if (ret)
> return dev_err_probe(dev, ret, "Failed to load init data file");
>
> @@ -270,7 +278,8 @@ static int bmi270_chip_init(struct bmi270_data *bmi270_device)
> return bmi270_configure_imu(bmi270_device);
> }
>
> -int bmi270_core_probe(struct device *dev, struct regmap *regmap)
> +int bmi270_core_probe(struct device *dev, struct regmap *regmap,
> + const struct bmi270_chip_info *chip_info)
> {
> int ret;
> struct bmi270_data *bmi270_device;
> @@ -283,6 +292,7 @@ int bmi270_core_probe(struct device *dev, struct regmap *regmap)
> bmi270_device = iio_priv(indio_dev);
> bmi270_device->dev = dev;
> bmi270_device->regmap = regmap;
> + bmi270_device->chip_info = chip_info;
>
> ret = bmi270_chip_init(bmi270_device);
> if (ret)
> @@ -290,7 +300,7 @@ int bmi270_core_probe(struct device *dev, struct regmap *regmap)
>
> indio_dev->channels = bmi270_channels;
> indio_dev->num_channels = ARRAY_SIZE(bmi270_channels);
> - indio_dev->name = "bmi270";
> + indio_dev->name = chip_info->name;
> indio_dev->modes = INDIO_DIRECT_MODE;
> indio_dev->info = &bmi270_info;
>
> diff --git a/drivers/iio/imu/bmi270/bmi270_i2c.c b/drivers/iio/imu/bmi270/bmi270_i2c.c
> index d59161f23f9a..394f27996059 100644
> --- a/drivers/iio/imu/bmi270/bmi270_i2c.c
> +++ b/drivers/iio/imu/bmi270/bmi270_i2c.c
> @@ -17,22 +17,27 @@ static int bmi270_i2c_probe(struct i2c_client *client)
> {
> struct regmap *regmap;
> struct device *dev = &client->dev;
> + const struct bmi270_chip_info *chip_info;
> +
> + chip_info = i2c_get_match_data(client);
> + if (!chip_info)
> + return -ENODEV;
>
> regmap = devm_regmap_init_i2c(client, &bmi270_i2c_regmap_config);
> if (IS_ERR(regmap))
> return dev_err_probe(dev, PTR_ERR(regmap),
> "Failed to init i2c regmap");
>
> - return bmi270_core_probe(dev, regmap);
> + return bmi270_core_probe(dev, regmap, chip_info);
> }
>
> static const struct i2c_device_id bmi270_i2c_id[] = {
> - { "bmi270", 0 },
> + { "bmi270", (kernel_ulong_t)&bmi270_chip_info },
> { }
> };
>
> static const struct of_device_id bmi270_of_match[] = {
> - { .compatible = "bosch,bmi270" },
> + { .compatible = "bosch,bmi270", .data = &bmi270_chip_info },
> { }
> };
>
> diff --git a/drivers/iio/imu/bmi270/bmi270_spi.c b/drivers/iio/imu/bmi270/bmi270_spi.c
> index b53784d4a1f4..7c2062c660d9 100644
> --- a/drivers/iio/imu/bmi270/bmi270_spi.c
> +++ b/drivers/iio/imu/bmi270/bmi270_spi.c
> @@ -49,6 +49,11 @@ static int bmi270_spi_probe(struct spi_device *spi)
> {
> struct regmap *regmap;
> struct device *dev = &spi->dev;
> + const struct bmi270_chip_info *chip_info;
> +
> + chip_info = spi_get_device_match_data(spi);
> + if (!chip_info)
> + return -ENODEV;
>
> regmap = devm_regmap_init(dev, &bmi270_regmap_bus, dev,
> &bmi270_spi_regmap_config);
> @@ -56,16 +61,16 @@ static int bmi270_spi_probe(struct spi_device *spi)
> return dev_err_probe(dev, PTR_ERR(regmap),
> "Failed to init i2c regmap");
>
> - return bmi270_core_probe(dev, regmap);
> + return bmi270_core_probe(dev, regmap, chip_info);
> }
>
> static const struct spi_device_id bmi270_spi_id[] = {
> - { "bmi270" },
> + { "bmi270", (kernel_ulong_t)&bmi270_chip_info },
> { }
> };
>
> static const struct of_device_id bmi270_of_match[] = {
> - { .compatible = "bosch,bmi270" },
> + { .compatible = "bosch,bmi270", .data = &bmi270_chip_info },
> { }
> };
>