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-rw-r--r--src/mainboard/siemens/mc_ehl/variants/mc_ehl2/devicetree.cb15
1 files changed, 14 insertions, 1 deletions
diff --git a/src/mainboard/siemens/mc_ehl/variants/mc_ehl2/devicetree.cb b/src/mainboard/siemens/mc_ehl/variants/mc_ehl2/devicetree.cb
index 4109ec9157..d5d12777ec 100644
--- a/src/mainboard/siemens/mc_ehl/variants/mc_ehl2/devicetree.cb
+++ b/src/mainboard/siemens/mc_ehl/variants/mc_ehl2/devicetree.cb
@@ -144,8 +144,21 @@ chip soc/intel/elkhartlake
register "cap_charge" = "CHARGE_OFF"
device i2c 0x52 on end # RTC RV3028-C7
end
+ # Add dummy I2C device to limit BUS speed to 100 kHz in OS
+ chip drivers/i2c/generic
+ register "hid" = ""PRP0001""
+ register "speed" = "I2C_SPEED_STANDARD"
+ device i2c 0x7f on end
+ end
+ end
+ device pci 15.2 on # I2C2
+ # Add dummy I2C device to limit BUS speed to 100 kHz in OS
+ chip drivers/i2c/generic
+ register "hid" = ""PRP0001""
+ register "speed" = "I2C_SPEED_STANDARD"
+ device i2c 0x7f on end
+ end
end
- device pci 15.2 on end # I2C2
device pci 15.3 on end # I2C3
device pci 16.0 hidden end # Management Engine Interface 1