[DanG]

I must retract my statement regarding mpu6050 driver and PREEMPT_RT, from above. It works!

I suspect I had failed to make linux-rebuild to compile the corrected .dts file.

[DanG]

Looks like the mpu6050 driver has not been tested with PREEMPT_RT_FULL. I’ll post back when I find a solution to that problem.

Thank you

[DanG]

Hi Eshtaartha,
Thank you for the diagnosis and remedy. I’ve verified using the v4.9-2 dtb.

Unfortunately, for me, the 4.19.37 rt configuration deadlocks as soon as I enable the buffer (echo 1 > buffer/enable). Prior to your imu_int_en addition, the deadlock I could cause a deadlock by enabling the buffer and then cat in_accel_x_raw. I happened to do that by accident. Of course, this issue isn’t an Octavo Systems problem; I’m using a different kernel and file system and the mpu driver isn’t even yours.

In case you are interested to help, the updated dts[i], .patch, and log are attached.

Thanks, again, for your valuable help!

Attachments:

1. mpu9150-iio-buf-deadlock.zip

[DanG]

This one is just plain zip, as requested. Hope it works.

• This reply was modified 5 years, 4 months ago by DanG.
• This reply was modified 5 years, 4 months ago by DanG.
• This reply was modified 5 years, 4 months ago by DanG.

Attachments:

1. mpu9250-iio-buffer-not-working-post-8450.zip

[DanG]

I’m using buildroot-2019.05 with OSD3358-SM-RED. See attachment for configuration details (created with tar cj).

[Author]

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