sravan/system76-firmware-open
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

docs: Use devicetree.py for dt values

Browse Source
This commit is contained in:
Tim Crawford
2021-03-03 12:53:48 -07:00
committed by Jeremy Soller
parent c6ea487b77
commit 57c3682201
1 changed files with 2 additions and 35 deletions
Download Patch File Download Diff File Expand all files Collapse all files

37
docs/adding-a-new-board.md
View File

@ -75,41 +75,8 @@ cp coreboot/.config models/<model>/coreboot.config
### devicetree
Some values to set in `devicetree.cb` that are not collected by `generate.sh`.
- Power limits
```
sudo cat /sys/class/powercap/intel-rapl:0/constraint_0_power_limit_uw
sudo cat /sys/class/powercap/intel-rapl:0/constraint_1_power_limit_uw
```
- Power
```
# pmc_bar + GEN_PMCON_A
sudo devmem2 0xfe001020
# PchPmSlpS3MinAssert = bits 11:10
# PchPmSlpS4MinAssert = bits 5:4
# pmc_bar + PM_CFG
sudo devmem2 0xfe001818
# PchPmSlpSusMinAssert = bits 19:18
# PchPmSlpAMinAssert = bits 17:16
```
- Thermal
```
sudo modprobe msr
sudo rdmsr --bitfield 31:24 --decimal 0x1A2
```
- LPC
```
sudo lspci -s 1f.0 -xxx
# gen1_dec: 0x84-0x87
# gen2_dec: 0x88-0x8B
# gen3_dec: 0x8C-0c8F
# gen4_dec: 0x90-0x93
```
`generate.sh` does not create `devicetree.cb`. Some values for this file can be
produced using the `devicetree.py` script.
## Porting System76 EC