linux-kernel - Re: [PATCH 5/6] iio: imu: adis16480: Add support for ADIS1649x family of devices

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Date:   Wed, 20 Feb 2019 10:40:49 +0000
From:   Jonathan Cameron <jic23@...nel.org>
To:     Stefan Popa <stefan.popa@...log.com>
Cc:     <robh+dt@...nel.org>, <Michael.Hennerich@...log.com>,
        <knaack.h@....de>, <lars@...afoo.de>, <pmeerw@...erw.net>,
        <gregkh@...uxfoundation.org>, <linux-kernel@...r.kernel.org>,
        <linux-iio@...r.kernel.org>
Subject: Re: [PATCH 5/6] iio: imu: adis16480: Add support for ADIS1649x
 family of devices

On Tue, 19 Feb 2019 19:12:17 +0200
Stefan Popa <stefan.popa@...log.com> wrote:

> The ADIS16495 and ADIS16497 are inertial systems that include a triaxis
> gyroscope and a triaxis accelerometer. The serial peripheral interface
> (SPI) provide a simple interface for data collection and configuration
> control. The devices are similar to ADIS16475, ADIS16480, ADIS16485 and
> ADIS16488, the main differences are related to range and scale factors.
> 
> The temperature data scale is 0.00565 C/LSB for ADIS16475 and ADIS1648x
> devices, while for ADIS1649x 0.0125 C/LSB.
> 
> Another difference is that ADIS1649x devices support different gyroscope
> measurement ranges which are dependent on the dash number (-1, -2, -3),
> see Table 24 in the ADIS16495 datasheet. However, the ADIS16497
> gyroscopes have the same scale as ADIS16495.
> 
> Furthermore, ADIS16495 devices support the acceleration maximum range of
> 8g, while ADIS16497 devices go up to 40g.
> 
> Datasheets:
> Link: https://www.analog.com/media/en/technical-documentation/data-sheets/adis16495.pdf
> Link: https://www.analog.com/media/en/technical-documentation/data-sheets/adis16497.pdf
> 
> Signed-off-by: Stefan Popa <stefan.popa@...log.com>
Looks fine, but will probably change with the tweaks suggested for earlier
patches.

Thanks,

Jonathan

> ---
>  drivers/iio/imu/adis16480.c | 72 +++++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 72 insertions(+)
> 
> diff --git a/drivers/iio/imu/adis16480.c b/drivers/iio/imu/adis16480.c
> index cc53825..c30acfdb 100644
> --- a/drivers/iio/imu/adis16480.c
> +++ b/drivers/iio/imu/adis16480.c
> @@ -714,6 +714,12 @@ enum adis16480_variant {
>  	ADIS16480,
>  	ADIS16485,
>  	ADIS16488,
> +	ADIS16495_1,
> +	ADIS16495_2,
> +	ADIS16495_3,
> +	ADIS16497_1,
> +	ADIS16497_2,
> +	ADIS16497_3,
>  };
>  
>  static const struct adis16480_chip_info adis16480_chip_info[] = {
> @@ -758,6 +764,60 @@ static const struct adis16480_chip_info adis16480_chip_info[] = {
>  		.accel_max_scale = 18,
>  		.temp_max_scale = 10619,
>  	},
> +	[ADIS16495_1] = {
> +		.channels = adis16485_channels,
> +		.num_channels = ARRAY_SIZE(adis16485_channels),
> +		.gyro_max_val = IIO_RAD_TO_DEGREE(20000),
> +		.gyro_max_scale = 125,
> +		.accel_max_val = IIO_M_S_2_TO_G(32000),
> +		.accel_max_scale = 8,
> +		.temp_max_scale = 4800,
> +	},
> +	[ADIS16495_2] = {
> +		.channels = adis16485_channels,
> +		.num_channels = ARRAY_SIZE(adis16485_channels),
> +		.gyro_max_val = IIO_RAD_TO_DEGREE(18000),
> +		.gyro_max_scale = 450,
> +		.accel_max_val = IIO_M_S_2_TO_G(32000),
> +		.accel_max_scale = 8,
> +		.temp_max_scale = 4800,
> +	},
> +	[ADIS16495_3] = {
> +		.channels = adis16485_channels,
> +		.num_channels = ARRAY_SIZE(adis16485_channels),
> +		.gyro_max_val = IIO_RAD_TO_DEGREE(20000),
> +		.gyro_max_scale = 2000,
> +		.accel_max_val = IIO_M_S_2_TO_G(32000),
> +		.accel_max_scale = 8,
> +		.temp_max_scale = 4800,
> +	},
> +	[ADIS16497_1] = {
> +		.channels = adis16485_channels,
> +		.num_channels = ARRAY_SIZE(adis16485_channels),
> +		.gyro_max_val = IIO_RAD_TO_DEGREE(20000),
> +		.gyro_max_scale = 125,
> +		.accel_max_val = IIO_M_S_2_TO_G(32000),
> +		.accel_max_scale = 40,
> +		.temp_max_scale = 4800,
> +	},
> +	[ADIS16497_2] = {
> +		.channels = adis16485_channels,
> +		.num_channels = ARRAY_SIZE(adis16485_channels),
> +		.gyro_max_val = IIO_RAD_TO_DEGREE(18000),
> +		.gyro_max_scale = 450,
> +		.accel_max_val = IIO_M_S_2_TO_G(32000),
> +		.accel_max_scale = 40,
> +		.temp_max_scale = 4800,
> +	},
> +	[ADIS16497_3] = {
> +		.channels = adis16485_channels,
> +		.num_channels = ARRAY_SIZE(adis16485_channels),
> +		.gyro_max_val = IIO_RAD_TO_DEGREE(20000),
> +		.gyro_max_scale = 2000,
> +		.accel_max_val = IIO_M_S_2_TO_G(32000),
> +		.accel_max_scale = 40,
> +		.temp_max_scale = 4800,
> +	},
>  };
>  
>  static const struct iio_info adis16480_info = {
> @@ -1000,6 +1060,12 @@ static const struct spi_device_id adis16480_ids[] = {
>  	{ "adis16480", ADIS16480 },
>  	{ "adis16485", ADIS16485 },
>  	{ "adis16488", ADIS16488 },
> +	{ "adis16495-1", ADIS16495_1 },
> +	{ "adis16495-2", ADIS16495_2 },
> +	{ "adis16495-3", ADIS16495_3 },
> +	{ "adis16497-1", ADIS16497_1 },
> +	{ "adis16497-2", ADIS16497_2 },
> +	{ "adis16497-3", ADIS16497_3 },
>  	{ }
>  };
>  MODULE_DEVICE_TABLE(spi, adis16480_ids);
> @@ -1009,6 +1075,12 @@ static const struct of_device_id adis16480_of_match[] = {
>  	{ .compatible = "adi,adis16480" },
>  	{ .compatible = "adi,adis16485" },
>  	{ .compatible = "adi,adis16488" },
> +	{ .compatible = "adi,adis16495-1" },
> +	{ .compatible = "adi,adis16495-2" },
> +	{ .compatible = "adi,adis16495-3" },
> +	{ .compatible = "adi,adis16497-1" },
> +	{ .compatible = "adi,adis16497-2" },
> +	{ .compatible = "adi,adis16497-3" },
>  	{ },
>  };
>  MODULE_DEVICE_TABLE(of, adis16480_of_match);