Seunghwan Kim has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/31085
Change subject: mainboard/google/octopus/variants/casta: Decrease touchpad I2C CLK frequency ......................................................................
mainboard/google/octopus/variants/casta: Decrease touchpad I2C CLK frequency
ELAN touchpad supports up to 400KHz, so we need to limit its CLK frequency to 400HKz.
BUG=NONE BRANCH=octopus TEST=built and verified touchpad I2C clk frequency gets be lower than 400KHz
Change-Id: If7a43fe20c7e5abdf23c8c36e34c072c371563bf Signed-off-by: Seunghwan Kim sh_.kim@samsung.com --- M src/mainboard/google/octopus/variants/casta/overridetree.cb 1 file changed, 13 insertions(+), 1 deletion(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/85/31085/1
diff --git a/src/mainboard/google/octopus/variants/casta/overridetree.cb b/src/mainboard/google/octopus/variants/casta/overridetree.cb index 8915e1a..fbb1826 100644 --- a/src/mainboard/google/octopus/variants/casta/overridetree.cb +++ b/src/mainboard/google/octopus/variants/casta/overridetree.cb @@ -1,5 +1,4 @@ chip soc/intel/apollolake - # Intel Common SoC Config #+-------------------+---------------------------+ #| Field | Value | @@ -8,12 +7,25 @@ #| | required to set up a BAR | #| | for TPM communication | #| | before memory is up | + #| I2C5 | Audio | + #| I2C6 | Trackpad | #+-------------------+---------------------------+ register "common_soc_config" = "{ .gspi[0] = { .speed_mhz = 1, .early_init = 1, }, + .i2c[5] = { + .speed = I2C_SPEED_FAST, + .rise_time_ns = 104, + .fall_time_ns = 52, + }, + .i2c[6] = { + .speed = I2C_SPEED_FAST, + .rise_time_ns = 66, + .fall_time_ns = 90, + .data_hold_time_ns = 350, + }, }"
device domain 0 on