Setting PMIC VDDARM_IN and VDDSOC_IN separately

[Maddis]

This is more Linux question not so much HW.

We have custom i.MX6Q based and so far VDDARM_IN and VDDSOC_IN had been set to same 1.425V. Now there is need to set VDDSOC_IN to 1.375V, but leave VDDARM_IN to 1.425V.

In Linux device tree pmic voltage configured like this:

--

                        operating-points = <
                                /* kHz    uV */
                                1200000 1425000
                                996000  1425000
                                852000  1425000
                                792000  1425000
                                396000  1425000
                        >;
                        fsl,soc-operating-points = <
                                /* ARM kHz  SOC-PU uV */
                                1200000 1425000
                                996000  1425000
                                852000  1425000
                                792000  1425000
                                396000  1425000 

                      >;

&cpu0 {
        arm-supply = <&sw1c_reg>; /* SW1A/B/C combined */
        soc-supply = <&sw2_reg>;
        pu-supply = <&reg_pu>;
};

--

These settings set both VDDSOC_IN and VDDARM_IN voltages even If I change soc-operating points only. So how do I change only VDDSOC_IN if that's even possible with current system?

[art]

You can set up the PMIC output voltages as required at runtime using the regular PMIC driver, as described in the Section 2.3.2 of the attached document.

Have a great day,
Artur

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[Maddis]

I was hoping quick'n'easy Device Tree config change, but I guess I'll have to use PMIC API. Thanks.