IMX8 PMIC

[gravity_one]

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?

[igorpadykov]

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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[gravity_one]

[igorpadykov]

sc_fw_port.pdf

[gravity_one]

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。

[igorpadykov]

>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 

[gravity_one]

PMIC  is  pf8100