topic Probing TPS65185 issue in i.MX Processors

Probing TPS65185 issue

econote_vikrant — Tue, 12 Feb 2019 07:40:38 GMT

Greetings!

I am using imx7dsabresd and I have designed my own daughter board for TPS65185 PMIC.

I have followed the link for patching files

http://sprunge.us/LWHf

I have modified/patched following files

arch/arm/boot/dts/imx7d-sdb.dts

arch/arm/configs/imx_v7_defconfig

drivers/hwmon/Kconfig

drivers/hwmon/Makefile

drivers/hwmon/tps6518x-hwmon.c

drivers/mfd/Kconfig

drivers/mfd/Makefile

drivers/mfd/tps6518x-core.c

drivers/regulator/Kconfig

drivers/regulator/Makefile

drivers/regulator/tps6518x-regulator.c

include/linux/mfd/tps6518x.h

Patching is done successfully but now my kernel is not showing me any changes after compiling and deploying it.

However my TPS is giving me correct voltages but the kernel not probing the driver. Kindly assist if I am missing something or I have to do any other modifications.

Kernel version: L4.9.88_2.0.0_ga from Yocto build

Re: Probing TPS65185 issue

igorpadykov — Wed, 13 Feb 2019 02:59:20 GMT

Hi Vikrant

one can try to debug it in probe function of tps6518x driver, checking i2c signals

with oscilloscope and using app note

AN4553 Using Open Source Debugging Tools for Linux on i.MX Processors
https://www.nxp.com/docs/en/application-note/AN4553.pdf

Best regards
igor
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Re: Probing TPS65185 issue

econote_vikrant — Thu, 14 Feb 2019 12:10:32 GMT

Thanks for your reply!

But the document you mentioned AN4553 mentioned debugging process which is really little confusing in terms of current kernel version I am using. I have not worked with i.MX6 before so there are some processes according to the older version of Yocto, gcc as well as Eclipse, kindly assist me with the updated document or process if available.

Beside that I just want to make sure that the files I mentioned above are sufficient to probe the TPS6518x driver or not!

Thanks in advance!

Re: Probing TPS65185 issue

igorpadykov — Fri, 15 Feb 2019 05:56:51 GMT

Hi Vikrant

please try nxp linux L4.14.78_1.0.0
linux-imx - i.MX Linux kernel

Linux L4.14.78_1.0.0 Documentation

Best regards
igor

Re: Probing TPS65185 issue

econote_vikrant — Mon, 04 Mar 2019 07:34:30 GMT

Hi Igor,

Thank you for your help, however documentation aren't enough to develop the whole system. But I have solved the problem by going through lot other references.

Re: Probing TPS65185 issue

snehix — Tue, 08 Feb 2022 06:56:02 GMT

Dear Vikranth,

Will you be able to share your updated version that works.

Thanks and Best Regards,

Surajit

Re: Probing TPS65185 issue

Nicolamas — Mon, 06 Feb 2023 17:42:53 GMT

Hi econote_vikrant,
How did you solve the probing problem?
I did exactly everything it says to do for the patch, however I can't do the probing, and I think I have the same problem as you.
It's been a long time since your post, and you probably won't remember, but I'm asking for a little help.
Many thanks !
Nicola