[XS] Change in coreboot[main]: mb/samsung/stumpy: Set initial fan PWM to 30%

[Matt DeVillier (Code Review)]

Matt DeVillier has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/81514?usp=email )

Change subject: mb/samsung/stumpy: Set initial fan PWM to 30%
......................................................................

mb/samsung/stumpy: Set initial fan PWM to 30%

Recent changes to the ITE 8772F SIO code caused the initial fan PMW
to change from 0 to 50%; set it to 30% to reduce fan noise while
still providing some temp control before the OS/ACPI takes over.

TEST=build/boot stumpy to payload, verify fan noise is negligable.

Change-Id: I287e46202ee1c112d1da63c0d8b7889958e3807e
Signed-off-by: Matt DeVillier 
---
M src/mainboard/samsung/stumpy/devicetree.cb
1 file changed, 1 insertion(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/14/81514/1

diff --git a/src/mainboard/samsung/stumpy/devicetree.cb b/src/mainboard/samsung/stumpy/devicetree.cb
index 853e519..bc24464 100644
--- a/src/mainboard/samsung/stumpy/devicetree.cb
+++ b/src/mainboard/samsung/stumpy/devicetree.cb
@@ -91,6 +91,7 @@
    				register "TMPIN3.mode" = "THERMAL_PECI"
    				# Enable FAN3
    				register "FAN3.mode" = "FAN_SMART_SOFTWARE"
+					register "FAN3.smart.pwm_start" = "30"

device pnp 2e.0 off end # FDC
    				device pnp 2e.1 on # Serial Port 1