summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--src/mainboard/google/reef/variants/baseboard/devicetree.cb11
1 files changed, 11 insertions, 0 deletions
diff --git a/src/mainboard/google/reef/variants/baseboard/devicetree.cb b/src/mainboard/google/reef/variants/baseboard/devicetree.cb
index 5aa1d32ec2..6c8cd8f20d 100644
--- a/src/mainboard/google/reef/variants/baseboard/devicetree.cb
+++ b/src/mainboard/google/reef/variants/baseboard/devicetree.cb
@@ -95,6 +95,17 @@ chip soc/intel/apollolake
}
}"
+ # Limit digitizer speed to 400kHz with manually tuned values.
+ register "i2c[5]" = "{
+ .speed = I2C_SPEED_FAST,
+ .speed_config[0] = {
+ .speed = I2C_SPEED_FAST,
+ .scl_lcnt = 0xd0,
+ .scl_hcnt = 0x68,
+ .sda_hold = 0x27,
+ }
+ }"
+
# Minimum SLP S3 assertion width 28ms.
register "slp_s3_assertion_width_usecs" = "28000"