[AW-PU550] can't find PMIC : PCA9450

[thiago_machado]

Hello NXP TechSupport,

I'm using two NXP Nano EVK. One of them with the original SOM that comes with the EVK plugged in and the other with a AW-PU550 from AzureWave. I'm trying to flash the BSP L5.4.47-2.2.0_images_MX8MNEVK into both of them. I successfully did it with Serial Download Mode in the original one only. When repeat the same steps with the AW-PU550 in Serial Download Mode I get the error can't find PMIC : PCA9450. Also, when I flash the image to the SDCard using the imx-image-multimedia-imx8mnevk.wic and imx-image-full-imx8mnevk.wic that comes with the BSP, in both of them I get the same error.

AW-PU550 PMIC: ROHM BD71847A

NXP PMIC: ROHM BD71850

A difference device in the SOM board (PMIC or RAM) could cause this behavior?

Is it possible to flash a different distro to the i.MX processors like Debian?

[nxf63675]

Hi @thiago_machado,

For your questions:

1. Yes, a different PMIC can cause this error.

2. Yes, but this will be not supported from our part, the only distros that are supported are in the next link:

https://www.nxp.com/design/software/embedded-software/i-mx-software:IMX-SW

As you are using the AW-PU550 PMIC: ROHM BD71847A this may be causing this issue, you should remove CONFIG_POWER_PCA9450 in u-boot/include/configs/imx8mn_evk.h, then re-compile images.

See spl.c, you will know why :

#include <power/pmic.h>
#ifdef CONFIG_POWER_PCA9450
#include <power/pca9450.h>
#else
#include <power/bd71837.h>

Regards,

Israel H.