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-rw-r--r--src/mainboard/google/reef/variants/baseboard/devicetree.cb45
1 files changed, 23 insertions, 22 deletions
diff --git a/src/mainboard/google/reef/variants/baseboard/devicetree.cb b/src/mainboard/google/reef/variants/baseboard/devicetree.cb
index 278cc576b7..263255f328 100644
--- a/src/mainboard/google/reef/variants/baseboard/devicetree.cb
+++ b/src/mainboard/google/reef/variants/baseboard/devicetree.cb
@@ -71,39 +71,40 @@ chip soc/intel/apollolake
register "gpe0_dw2" = "PMC_GPE_N_63_32"
register "gpe0_dw3" = "PMC_GPE_SW_31_0"
- # Enable I2C2 bus early for TPM access and configure as 400kHz
- # with manually tuned values.
+ # Enable I2C0 for audio codec at 400kHz
+ register "i2c[0]" = "{
+ .speed = I2C_SPEED_FAST,
+ .rise_time_ns = 104,
+ .fall_time_ns = 52,
+ }"
+
+ # Enable I2C2 bus early for TPM at 400kHz
register "i2c[2]" = "{
.early_init = 1,
.speed = I2C_SPEED_FAST,
- .speed_config[0] = {
- .speed = I2C_SPEED_FAST,
- .scl_lcnt = 0xd0,
- .scl_hcnt = 0x68,
- .sda_hold = 0x27,
- }
+ .rise_time_ns = 57,
+ .fall_time_ns = 28,
+ }"
+
+ # touchscreen at 400kHz
+ register "i2c[3]" = "{
+ .speed = I2C_SPEED_FAST,
+ .rise_time_ns = 76,
+ .fall_time_ns = 164,
}"
- # Limit trackpad speed to 400kHz with manually tuned values.
+ # trackpad at 400kHz
register "i2c[4]" = "{
.speed = I2C_SPEED_FAST,
- .speed_config[0] = {
- .speed = I2C_SPEED_FAST,
- .scl_lcnt = 0xd0,
- .scl_hcnt = 0x68,
- .sda_hold = 0x27,
- }
+ .rise_time_ns = 114,
+ .fall_time_ns = 164,
}"
- # Limit digitizer speed to 400kHz with manually tuned values.
+ # digitizer at 400kHz
register "i2c[5]" = "{
.speed = I2C_SPEED_FAST,
- .speed_config[0] = {
- .speed = I2C_SPEED_FAST,
- .scl_lcnt = 0xd0,
- .scl_hcnt = 0x68,
- .sda_hold = 0x27,
- }
+ .rise_time_ns = 152,
+ .fall_time_ns = 30,
}"
# Minimum SLP S3 assertion width 28ms.