Can't find PMIC:PCA9450

[nikhil29]

Hello,

As I told before, there are two versions of the i.MX8MNano EVK CPU board. Earlier is 8MNANOD4-CPU that contains DDR4 memory and BD71850MWV PMIC. Later is X-815LPD4-CPUCY that contains LPDDR4 memory and PCA9450 PMIC. You have the earlier 8MNANOD4-CPU one.

By default, the L5.4.3 Linux BSP supports the 8MNANOD4-CPU board (yours one), whereas the L5.4.24 Linux BSP supports the X-815LPD4-CPUCY board by default. I have escalated your request to our R&D asking for how to build the L5.4.24_2.1.0 BSP to make it support the earlier 8MNANOD4-CPU board. Now awaiting for the feedback from them.

Best Regards,
Artur

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i.MX 8M Nano EVK

Hello NXP TechSupport

Any reply from NXP's R&D team regarding above issue ??

Latest Linux BSP [ Rev. L5.4.47_2.2.0 — 30 September 2020 ] is also showing same error as can't find PMIC:PCA9450.

Thanks

Nikhil

[art · Accepted solution]

Hello Nikhil,

Finally, I've got some feedback from the SW guys.

To make the latest BSPs support the early version of the i.MX8MNano EVK board (PMIC by Rohm, DDR4 memory) you first have to add #define CONFIG_IMX8M_DDR4 to the beginning of this file:

https://source.codeaurora.org/external/imx/uboot-imx/tree/include/configs/imx8mn_evk.h?h=imx_v2020.0...

Then, you have to rebuild the uboot using the following defconfig file:

https://source.codeaurora.org/external/imx/uboot-imx/tree/configs/imx8mn_ddr4_evk_defconfig?h=imx_v2...

Best Regards,
Artur

[hhm95]

Hi!. I am newbie, and I have same problem

My device is imx8mmevk and using BD71850MWV.

I bootloader successful using L5.4.3 and display UART: powe_bd71837_init.

Now, i want create boot myselt using tutorial and boot display: Can't find PMIC:PCA9450.

So, is there a quick way to configure PMIC from PCA9450 to my device?.

I read your question but I don't now where location of config file and how to rebuild using your config.

Can you be more detailed?

Thanks you so much!

[hhm95]

Is there a way to build that uses the default PMIC BD71850MWV? Not using sample L5.4.3, I want build myself using command line,

ex: 

...

$repo init -u https://source.codeaurora.org/external/imx/imx-manifest -b imx-linux-hardknott -m imx-5.10.52-2.1.0.xml

$repo sync

$DISTRO=fsl-imx-xwayland MACHINE=imx8mmevk source imx-setup-release.sh -b build-xwayland

$ bitbake core-image-minimal

[nikhil29]

Thanks Artur

I'll try this,  hope it'll be helpful for me

Thanks

Nikhil

[art]

Hello Nikhil,

I'm still in discussion with the R&D team. Will inform you as soon as I get something definite. For now, please use the L5.4.3 BSP.

Best Regards,
Artur

[nikhil29]

Thanks Artur for your time

Ok, i'll be waiting for your reply regarding this issue.

1]  So, how do i compile a Linux BSP [ 5.4.3 ] using Yocto project.

2]  Till now, i only found 5.4.24 and 5.4.47 [ latest ].

3]  If you have 5.4.3 Linux BSP Yocot set up link, please share with me.

Thanks

Nikhil

[art]

You can find the L5.4.3 and earlier BSP releases here (check the Linux Past Releases list):

https://www.nxp.com/design/software/embedded-software/i-mx-software/embedded-linux-for-i-mx-applicat...

I had checked the pre-built BSP image of L5.4.3 BSP on my i.MX8MNano EVK board (early version with Rohm PMIC and DDR4 memory, same as yours) - it works.

Best Regards,

Artur

[nikhil29]

Thanks Artur for your Support

I'll be helpful for me.

Thanks

Nikhil