IIO driver for the Invensense ICM-20948 IMU

IIO driver for the Invensense ICM-20948 IMU

[Martin Kelly]

Hi,

Unless I missed something, I noticed the ICM-20948 IMU from Invensense 
appears not to have an IIO driver yet. I'm wondering if there are plans 
to add one and if so, the expected timeline for it.

Thanks,
Martin

Re: IIO driver for the Invensense ICM-20948 IMU

[Jonathan Cameron]

On Thu, 16 Aug 2018 14:36:32 -0700
Martin Kelly <mkelly@xevo.com> wrote:

> Hi,
> 
> Unless I missed something, I noticed the ICM-20948 IMU from Invensense 
> appears not to have an IIO driver yet. I'm wondering if there are plans 
> to add one and if so, the expected timeline for it.
> 
> Thanks,
> Martin

Hi Martin,

I'm not aware of anyone looking at this part.  A quick glance a the datasheet
suggested this has an entirely different address map to the existing parts, so
won't be trivial to support either.

Hopefully Jean-Baptiste will have more information for us!

Jonathan

Re: IIO driver for the Invensense ICM-20948 IMU

[Jean-Baptiste Maneyrol]

Hello,

I'm currently working in background on adding our old 9-axis MPU-9250 (MPU-=
6500 + AK8963 in 1 package) to the existing driver.=20

Currently this kind of setup is supported by driving the mag from the ak897=
5 driver in the kernel. My goal is to drive the mag from the MPU using the =
MPU I2C master IP for achieving better performance (no jitter compared to k=
ernel timers) and provide a true 9-axis device.

ICM-20948 is ICM-20648 + AK9916 in 1 package. I think It should be possible=
 to support it inside the existing driver. We need first to add ICM-20648 s=
upport inside the driver. For the basic functions, this chip should be quit=
e similar to the already supported ones.

I am sorry there is no current plan or deadline for this kind of work. It r=
eally depends on my available bandwidth.

Feel free to work on it by adding first 6-axis (ICM-20648) support to the d=
river.

Best regards,
JB


From: Jonathan Cameron <jonathan.cameron@huawei.com>
Sent: Monday, August 20, 2018 15:28
To: Martin Kelly
Cc: linux-iio@vger.kernel.org; Jean-Baptiste Maneyrol
Subject: Re: IIO driver for the Invensense ICM-20948 IMU
=A0=20

On Thu, 16 Aug 2018 14:36:32 -0700
Martin Kelly <mkelly@xevo.com> wrote:

> Hi,
>=20
> Unless I missed something, I noticed the ICM-20948 IMU from Invensense=20
> appears not to have an IIO driver yet. I'm wondering if there are plans=20
> to add one and if so, the expected timeline for it.
>=20
> Thanks,
> Martin

Hi Martin,

I'm not aware of anyone looking at this part.=A0 A quick glance a the datas=
heet
suggested this has an entirely different address map to the existing parts,=
 so
won't be trivial to support either.

Hopefully Jean-Baptiste will have more information for us!

Jonathan

    =

Re: IIO driver for the Invensense ICM-20948 IMU

[Martin Kelly]

On 08/20/2018 07:05 AM, Jean-Baptiste Maneyrol wrote:
> Hello,
> 
> I'm currently working in background on adding our old 9-axis MPU-9250 (MPU-6500 + AK8963 in 1 package) to the existing driver.
> 
> Currently this kind of setup is supported by driving the mag from the ak8975 driver in the kernel. My goal is to drive the mag from the MPU using the MPU I2C master IP for achieving better performance (no jitter compared to kernel timers) and provide a true 9-axis device.

Thanks, that sounds like very useful work!

> 
> ICM-20948 is ICM-20648 + AK9916 in 1 package. I think It should be possible to support it inside the existing driver. We need first to add ICM-20648 support inside the driver. For the basic functions, this chip should be quite similar to the already supported ones.
> 
> I am sorry there is no current plan or deadline for this kind of work. It really depends on my available bandwidth.
> 

No problem, thanks for the information.

> Feel free to work on it by adding first 6-axis (ICM-20648) support to the driver.
> 
> Best regards,
> JB
> 
> 
> From: Jonathan Cameron <jonathan.cameron@huawei.com>
> Sent: Monday, August 20, 2018 15:28
> To: Martin Kelly
> Cc: linux-iio@vger.kernel.org; Jean-Baptiste Maneyrol
> Subject: Re: IIO driver for the Invensense ICM-20948 IMU
>    
> 
> On Thu, 16 Aug 2018 14:36:32 -0700
> Martin Kelly <mkelly@xevo.com> wrote:
> 
>> Hi,
>>
>> Unless I missed something, I noticed the ICM-20948 IMU from Invensense
>> appears not to have an IIO driver yet. I'm wondering if there are plans
>> to add one and if so, the expected timeline for it.
>>
>> Thanks,
>> Martin
> 
> Hi Martin,
> 
> I'm not aware of anyone looking at this part.  A quick glance a the datasheet
> suggested this has an entirely different address map to the existing parts, so
> won't be trivial to support either.
> 
> Hopefully Jean-Baptiste will have more information for us!
> 
> Jonathan
> 
>      
>