Lars: Set I2C[4] port voltage to 1.8v
As the audio card needs 1.8V I2C operation. This patch adds
entry into devicetree.cb to set I2C port 4 operate at 1.8V.
BRANCH=None
BUG=chrome-os-partner:47821
TEST=Built & booted lars board. Verified that I2C
port 4 is operating at 1.8V level
CQ-DEPEND=CL:*242225, CL:*241206, CL:315167
Change-Id: Iccc85a5e3bbf2b5362665036e1294a6635e38fbe
Signed-off-by: David Wu <David_Wu@quantatw.com>
Reviewed-on: https://chromium-review.googlesource.com/321000
Commit-Ready: David Wu <david_wu@quantatw.com>
Tested-by: David Wu <david_wu@quantatw.com>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
diff --git a/src/mainboard/google/lars/devicetree.cb b/src/mainboard/google/lars/devicetree.cb
index bc39f3e..cf3649a 100644
--- a/src/mainboard/google/lars/devicetree.cb
+++ b/src/mainboard/google/lars/devicetree.cb
@@ -146,6 +146,7 @@
register "usb3_ports[1]" = "USB3_PORT_DEFAULT" # SD
register "usb3_ports[2]" = "USB3_PORT_DEFAULT" # Type-A Port (card)
register "usb3_ports[3]" = "USB3_PORT_DEFAULT" # Type-A Port (board)
+ register "SerialIoI2cVoltage[4]" = "1" # I2C4 is 1.8V
# Must leave UART0 enabled or SD/eMMC will not work as PCI
register "SerialIoDevMode" = "{ \
