topic Re: IMX8 PMIC in i.MX Processors

IMX8 PMIC

gravity_one — Wed, 26 Feb 2020 03:08:10 GMT

hi，

use IMX8 EVK board, set PMIC power output，after kernel is start。

but PMIC ->PMIC_I2C,

DTB no PIMC_i2c config ,i donot know how to do?

Re: IMX8 PMIC

igorpadykov — Wed, 26 Feb 2020 05:29:08 GMT

Hi WANG

pmic usage with i.mx8 series is described in Linux Manual

from Linux 4.19.35_1.1.0 Documentation

SCFW Porting Kit

Best regards
igor
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Re: IMX8 PMIC

gravity_one — Wed, 26 Feb 2020 07:08:42 GMT

PMIC is pf8100

Re: IMX8 PMIC

gravity_one — Wed, 26 Feb 2020 07:09:59 GMT

Re: IMX8 PMIC

igorpadykov — Wed, 26 Feb 2020 07:20:29 GMT

sc_fw_port.pdf

Re: IMX8 PMIC

gravity_one — Wed, 26 Feb 2020 07:38:52 GMT

How does the kernel communicate with SCFW? Using the API: sc_pm_get_sys_power_mode,

Are there any examples of using apis in the kernel?

To modify the SCFW code, can only change the PMIC voltage output before kernel startup.

I think APP can also call API to modify the PMIC voltage output when running linux APP after kernel startup。

Re: IMX8 PMIC

igorpadykov — Wed, 26 Feb 2020 10:05:25 GMT

>How does the kernel communicate with SCFW?

example (SC_R_MU_1A) :

imx_rpmsg.c\rpmsg\drivers - linux-imx - i.MX Linux kernel

https://community.nxp.com/docs/DOC-340335