Re: [PATCH v2 6/6] iio: bmg160: Add SPI driver

[Markus Pargmann]

On Tue, Aug 04, 2015 at 01:02:59PM +0200, Markus Pargmann wrote:
> Signed-off-by: Markus Pargmann <mpa@xxxxxxxxxxxxxx>
> ---
>  drivers/iio/gyro/Kconfig      | 11 ++++++++
>  drivers/iio/gyro/Makefile     |  1 +
>  drivers/iio/gyro/bmg160_spi.c | 60 +++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 72 insertions(+)
>  create mode 100644 drivers/iio/gyro/bmg160_spi.c
> 
> diff --git a/drivers/iio/gyro/Kconfig b/drivers/iio/gyro/Kconfig
> index 1e6cfff5546f..420aea844216 100644
> --- a/drivers/iio/gyro/Kconfig
> +++ b/drivers/iio/gyro/Kconfig
> @@ -72,6 +72,17 @@ config BMG160_I2C
>  	  This driver can also be built as a module.  If so, the module
>  	  will be called bmg160_i2c.
>  
> +config BMG160_SPI
> +	tristate "Driver for connection via SPI"
> +	depends on SPI
> +	select REGMAP_SPI
> +	help
> +	  Say yes here to build support for Bosch BMG160 Tri-axis Gyro Sensor
> +	  driver connected via SPI. This driver also supports BMI055 gyroscope.
> +
> +	  This driver can also be built as a module.  If so, the module
> +	  will be called bmg160_spi.
> +
>  endif
>  
>  config HID_SENSOR_GYRO_3D
> diff --git a/drivers/iio/gyro/Makefile b/drivers/iio/gyro/Makefile
> index 608401041550..f866a4be0667 100644
> --- a/drivers/iio/gyro/Makefile
> +++ b/drivers/iio/gyro/Makefile
> @@ -10,6 +10,7 @@ obj-$(CONFIG_ADIS16260) += adis16260.o
>  obj-$(CONFIG_ADXRS450) += adxrs450.o
>  obj-$(CONFIG_BMG160) += bmg160_core.o
>  obj-$(CONFIG_BMG160_I2C) += bmg160_i2c.o
> +obj-$(CONFIG_BMG160_SPI) += bmg160_spi.o
>  
>  obj-$(CONFIG_HID_SENSOR_GYRO_3D) += hid-sensor-gyro-3d.o
>  
> diff --git a/drivers/iio/gyro/bmg160_spi.c b/drivers/iio/gyro/bmg160_spi.c
> new file mode 100644
> index 000000000000..4dcef65f3476
> --- /dev/null
> +++ b/drivers/iio/gyro/bmg160_spi.c
> @@ -0,0 +1,60 @@
> +#include <linux/spi/spi.h>
> +#include <linux/regmap.h>
> +#include <linux/iio/iio.h>
> +#include <linux/module.h>
> +
> +#include <bmg160.h>
> +
> +static const struct regmap_config bmg160_regmap_spi_conf = {
> +	.reg_bits = 8,
> +	.val_bits = 8,
> +	.read_flag_mask = 0x80,

This read_flag_mask seems to be the default for spi. The regmap spi bus
driver already defines this so it is not necessary here, will remove it.

Best regards,

Markus

> +
> +	.use_single_rw = true,
> +	.cache_type = REGCACHE_NONE,
> +};
> +
> +static int bmg160_spi_probe(struct spi_device *spi)
> +{
> +	struct regmap *regmap;
> +	const struct spi_device_id *id = spi_get_device_id(spi);
> +
> +	regmap = devm_regmap_init_spi(spi, &bmg160_regmap_spi_conf);
> +	if (IS_ERR(regmap)) {
> +		dev_err(&spi->dev, "Failed to register spi regmap %d\n",
> +			(int)PTR_ERR(regmap));
> +		return PTR_ERR(regmap);
> +	}
> +
> +	return bmg160_core_probe(&spi->dev, regmap, spi->irq, id->name);
> +}
> +
> +static int bmg160_spi_remove(struct spi_device *spi)
> +{
> +	bmg160_core_remove(&spi->dev);
> +
> +	return 0;
> +}
> +
> +static const struct spi_device_id bmg160_spi_id[] = {
> +	{"bmg160", 0},
> +	{"bmi055_gyro", 0},
> +	{}
> +};
> +
> +MODULE_DEVICE_TABLE(spi, bmg160_spi_id);
> +
> +static struct spi_driver bmg160_spi_driver = {
> +	.driver = {
> +		.name	= "bmg160_spi",
> +		.pm	= &bmg160_pm_ops,
> +	},
> +	.probe		= bmg160_spi_probe,
> +	.remove		= bmg160_spi_remove,
> +	.id_table	= bmg160_spi_id,
> +};
> +module_spi_driver(bmg160_spi_driver);
> +
> +MODULE_AUTHOR("Markus Pargmann <mpa@xxxxxxxxxxxxxx>");
> +MODULE_LICENSE("GPL v2");
> +MODULE_DESCRIPTION("BMG160 SPI Gyro driver");
> -- 
> 2.1.4
> 
> 
> 

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