Can't find PMIC:PCA9450

[nikhil29]

Hello NXP TechSupport

i.MX 8M Nano EVK

# Solved :-

1]  Issue of PMIC has solved by flashing Linux Demo image[ L5.4.3_1.0.0_MX8MN (REV LF_L5.4.3_1.0.0 ) ], having PMIC : BD71850MWV

# Error 1 :-

2]  But previously 1 month ago i had tried to flash a Linux Demo Image [ L5.4.24_2.1.0_MX8MN (REV L5.4.24_2.1.0 ) ] but it didn't work at that time, shown can't find PMIC : PCA9450.

# Error 2 :-

3] And after that I had also tried Yocto set up for BSP [ i.MX 8M Nano EVK ] from Yocto project User's Guide [ Rev. L5.4.24_2.1.0, 06/2020 ]

$  DISTRO=fsl-imx-xwayland MACHINE=imx8mnevk source imx-setup-release.sh -b build-xwayland
$  bitbake imx-image-full

After building above image i got all images and flashed on SD Card imx-image-full-imx8mnevk.wic

after successful flashing, getting same error as can't find PMIC : PCA9450.

Main Q :   EVK i'm using is i.MX8MN + PMIC : BD71837, so how do i disable this PMIC:PCA9450                     from Nano EVK's Linux BSP  ??

Thanks

Nikhil

[art · Accepted solution]

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

[nikhil29]

Hello NXP TechSupport

i.MX 8M Nano EVK

Still same error [ Can't find PMIC:PCA9450 ] after flashing latest Linux BSP [ Rev. L5.4.47_2.2.0, 30 September 2020 ] on SDCard.

Please share resulting solution as soon as possible.

Thanks

Nikhil

[nikhil29]

Thanks Artur for your support and time

I'm waiting for your reply too and also want to know solution that how could i make it ( L5.4.24_2.1.0 BSP ) possible to support to 8MNANOD4-CPU board.

Thanks 

Nikhil