topic Re: is MAG3110FCR2 supported on i.MX 6UltraLite EVK? in i.MX Processors

is MAG3110FCR2 supported on i.MX 6UltraLite EVK?

hafizabdul_kari — Tue, 30 Mar 2021 16:59:34 GMT

As per i.MX6ULL schematic, eCompass MAG3110FCR2 sensor is attached to i2c bus.

Release Notes https://www.nxp.com/docs/en/release-note/i.MX_Linux_Release_Notes.pdf page#20

"Supports the MAG3110FCR2 sensor on i.MX 6 boards.

Supports the FXLS8471 sensor on i.MX 6UltraLite EVK board.

Supports MPL3115A2, FXOS8700CQR1, and FXAS21002CQR1 sensors on all thei.MX 7 boards
"
By this we get an impression that MAG3110FCR2 sensor is supported on all i.MX boards mentioned in supported boards section which includes i.MX6ULL.

Now in reference Manual https://www.nxp.com/docs/en/reference-manual/i.MX_Reference_Manual_Linux.pdf page# 19 , it is stated that:

" i.MX supports magnetometer sensors for the following SoC:

i.MX 6 SABRE, 6SoloLite, and 6SoloX supports the MAG3110FCR2 sensor.

i.MX 6UltraLite EVK supports the FXLS8471 sensor.• i.MX 7Dual supports the MPL3115A2, FXOs8700CQR1 and FXAS21002CQR1sensors."

in boot logs we get:

root@imx6ull14x14evk:~# dmesg | grep mag
[ 1.919010] mag3110 0-000e: 0-000e supply vdd not found, using dummy regulator
[ 1.927356] mag3110 0-000e: 0-000e supply vddio not found, using dummy regulator
[ 1.935043] mag3110 0-000e: check mag3110 chip ID
[ 1.940226] mag3110 0-000e: read chip ID 0xfffffffa is not equal to 0xc4!
[ 1.947419] mag3110: probe of 0-000e failed with error -22
root@imx6ull14x14evk:~#

Am i missing something? Is mag3110 supported on i.MX6ull?
if it is supported, could you please point out why is it reading the wrong CHIP id?

Re: is MAG3110FCR2 supported on i.MX 6UltraLite EVK?

igorpadykov — Wed, 31 Mar 2021 04:20:13 GMT

Hi Abdul

one can try procedures from below link

https://imxdev.gitlab.io/tutorial/Interacting_with_i.MX6UL_EVK_sensors/

Best regards
igor

Re: is MAG3110FCR2 supported on i.MX 6UltraLite EVK?

hafizabdul_kari — Wed, 31 Mar 2021 06:50:01 GMT

@igorpadykovthanks for the reply.
This document is about i.MX6UL. Following this document, I configured kernel configurations to add SENSORS_MAG3110 and SENSOR_FXLS8471

And then tried enabling sensors.

root@imx6ull14x14evk:~# echo 1 > /sys/devices/virtual/input/input3/enable -sh: /sys/devices/virtual/input/input3/enable: No such file or directory

However i am able to enable FXLS8471Q Accelerometer and read it's data.

So, the questions are

As mentioned in schematic, is MAG3110 present in i.MX6ULL?
As mentioned in Release notes "Supports the MAG3110FCR2 sensor on i.MX 6 boards" It applies to i.MX6ULLEVK as well?
Reference Manual says "i.MX 6 SABRE, 6SoloLite, and 6SoloX supports the MAG3110FCR2 sensor." Does it mean MAG3110 is present but not supported?

Thanks,

Abdul Karim

Re: is MAG3110FCR2 supported on i.MX 6UltraLite EVK?

igorpadykov — Wed, 31 Mar 2021 07:28:53 GMT

As mentioned in schematic, is MAG3110 present in i.MX6ULL?

U1302 MAG3110 in included on SPF-28616_C1.pdf schematic p.8
MCIMX6ULL-EVK_DESIGNFILES

Design files, including hardware schematics, Gerbers, and OrCAD files

As mentioned in Release notes "Supports the MAG3110FCR2 sensor on i.MX 6 boards" It applies to i.MX6ULLEVK as well?

yes

Reference Manual says "i.MX 6 SABRE, 6SoloLite, and 6SoloX supports the MAG3110FCR2 sensor." Does it mean MAG3110 is present but not supported?

Best regards
igor

Re: is MAG3110FCR2 supported on i.MX 6UltraLite EVK?

hafizabdul_kari — Wed, 31 Mar 2021 07:43:23 GMT

@igorpadykovthanks a lot.
So, it is established that MAG3110 sensor is present and supported .. Am i right in my conclusion?

If yes, Could you please guide me, why is it giving the wrong chip ID?
[ 1.929618] mag3110 0-000e: read chip ID 0xfffffffa is not equal to 0xc4!

How can we make this work?