Change in coreboot[master]: mb/lenovo: dGPU power handling on T430(s), T530

[Evgeny Zinoviev (Code Review)]

Evgeny Zinoviev has uploaded this change for review. ( https://review.coreboot.org/28392

Change subject: mb/lenovo: dGPU power handling on T430(s), T530
......................................................................

mb/lenovo: dGPU power handling on T430(s), T530

Enable dGPU power handling on Lenovo ThinkPad T430, T430s, T530 via
PMH7 register 0x50.

Although there's no Thinker-1 chip on these models according to
schematics, dGPU power control via PMH7 works the same as on T420/T520,
so they can be considered Thinker-1-compatible.

It can be tested from linux userpace using util/pmh7tool.

To turn dGPU power off:
  pmh7tool -c 0x50 7
  pmh7tool -c 0x50 3

To turn it on:
  pmh7tool -s 0x50 3
  pmh7tool -s 0x50 7

To check whether it is on (bash):
  reg=0x$(pmh7tool -r 0x50)
  echo "$(( (( reg & 0x08 )) >> 3 ))"
or just `pmh7tool -b 0x50 3` with
https://review.coreboot.org/#/c/coreboot/+/28388/

Tested on ThinkPad W530.

Change-Id: Ieab1a33b3c680c757cc0999660b5cb7e122474cc
Signed-off-by: Evgeny Zinoviev 
---
M src/mainboard/lenovo/t430/devicetree.cb
M src/mainboard/lenovo/t530/variants/t530/devicetree.cb
M src/mainboard/lenovo/t530/variants/w530/devicetree.cb
3 files changed, 3 insertions(+), 3 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/92/28392/1

diff --git a/src/mainboard/lenovo/t430/devicetree.cb b/src/mainboard/lenovo/t430/devicetree.cb
index d466b36..5eb92bc 100644
--- a/src/mainboard/lenovo/t430/devicetree.cb
+++ b/src/mainboard/lenovo/t430/devicetree.cb
@@ -167,7 +167,7 @@
    				register "has_backlight_gpio" = "0"
    				register "has_dgpu_power_gpio" = "0"

-					register "has_thinker1" = "0"
+					register "has_thinker1" = "1"
    			end
    			chip drivers/pc80/tpm
    				device pnp 0c31.0 on end
diff --git a/src/mainboard/lenovo/t530/variants/t530/devicetree.cb b/src/mainboard/lenovo/t530/variants/t530/devicetree.cb
index 0da05e0..4dcdc9d 100644
--- a/src/mainboard/lenovo/t530/variants/t530/devicetree.cb
+++ b/src/mainboard/lenovo/t530/variants/t530/devicetree.cb
@@ -157,7 +157,7 @@
    				register "has_backlight_gpio" = "0"
    				register "has_dgpu_power_gpio" = "0"

-					register "has_thinker1" = "0"
+					register "has_thinker1" = "1"
    			end
    		end # LPC bridge
    		device pci 1f.2 on end # SATA Controller 1
diff --git a/src/mainboard/lenovo/t530/variants/w530/devicetree.cb b/src/mainboard/lenovo/t530/variants/w530/devicetree.cb
index d9d9df5..7a72b26 100644
--- a/src/mainboard/lenovo/t530/variants/w530/devicetree.cb
+++ b/src/mainboard/lenovo/t530/variants/w530/devicetree.cb
@@ -179,7 +179,7 @@
    				register "has_backlight_gpio" = "0"
    				register "has_dgpu_power_gpio" = "0"

-					register "has_thinker1" = "0"
+					register "has_thinker1" = "1"
    			end
    		end
    		device pci 1f.2 on # SATA Controller 1