AM69: Where can I find information about controlling the LDO from PMIC for SD card UHS-I

Daniel Mårtensson

Part Number: AM69

Tool/software:

Hi!

I want to know how the SD card UHS-I can tell the processor to tell the PMIC to change the SD pull-up voltage from 3.3V to 1.8V.

Is this configurable inside the device tree?

2 days ago

+1 Keerthy J 2 days ago

TI__Guru**** 162480 points

Hello,

Yes usually a SoC GPIO is modelled as the regulator to switch between 1.8v to 3.3v. You can look at the sdhci nodes in the k3-j784s4-main.dtsi.

Best Regards,

Keerthy

0 Daniel Mårtensson 1 day ago in reply to Keerthy J

Prodigy 20 points

Thank you. Now I know that this PMIC or GPIO configuration setup for controlling the voltage of the pull-ups for the SD card bus, can be done inside the device tree.

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AM69: Where can I find information about controlling the LDO from PMIC for SD card UHS-I