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Read LICELL Voltage in Software (Linux) from MMPF0200

Question asked by Jon Clay on Feb 5, 2020
Latest reply on Feb 16, 2020 by Jon Clay

Hello,

 

I am currently running a system with an i.MX6 Solo X and a PF 200 power manager component. I am also running Linux.

 

I want to read the current voltage of the coin cell from the power manager device (LICELL pin).

 

I've been reading http://cache.freescale.com/files/analog/doc/data_sheet/MMPF0200.pdf?fasp=1&WT_TYPE=Data%20Sheets&WT_VENDOR=FREESCALE&WT_… 

but no luck. I realize there is the i2c control for the coin cell however I don't want to set the voltage but only read the current voltage coming out of the battery via the power manager.

 

If there is a way to read on linux via sysfs that would be best. I know of the regulator devices in /sys/class/regulators but I'm not sure which one would be the for the external lithium ion battery (LICELL).

 

Thank you

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