Change in coreboot[master]: mb/google/dedede/var/boten: Add LTE power on/off sequence

[Karthik Ramasubramanian (Code Review)]

Karthik Ramasubramanian has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/44588 )

Change subject: mb/google/dedede/var/boten: Add LTE power on/off sequence
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Patch Set 10:

(1 comment)

https://review.coreboot.org/c/coreboot/+/44588/10/src/mainboard/google/deded... 
File src/mainboard/google/dedede/variants/boten/gpio.c:

https://review.coreboot.org/c/coreboot/+/44588/10/src/mainboard/google/deded... 
PS10, Line 11: 1
> Dear Furquan and Karthik, if set its value equal 0, LTE module can not work, we have do the experime […]

Peichao

1) ACPI methods are going to do the same thing as what these GPIO configurations are doing.
2) GPIOs will toggle to low once during the PO because of CSE FW Sync and then go back to high. This is not expected by the LTE module.
3) Configuring both FCPO and RESET as high here will not help to meet the LTE module's other power sequence requirements.