From 6dda1e05565785e6fa41b33957c1096d47ef7c77 Mon Sep 17 00:00:00 2001 From: Seunghwan Kim Date: Fri, 25 Jan 2019 09:38:40 +0900 Subject: 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=b:123376618 BRANCH=octopus TEST=built and verified touchpad I2C clk frequency gets be lower than 400KHz Change-Id: If7a43fe20c7e5abdf23c8c36e34c072c371563bf Signed-off-by: Seunghwan Kim Reviewed-on: https://review.coreboot.org/c/31085 Tested-by: build bot (Jenkins) Reviewed-by: Furquan Shaikh --- src/mainboard/google/octopus/variants/casta/overridetree.cb | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) (limited to 'src/mainboard/google/octopus/variants') diff --git a/src/mainboard/google/octopus/variants/casta/overridetree.cb b/src/mainboard/google/octopus/variants/casta/overridetree.cb index 8915e1ae9e..d70a6ea3f9 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 +7,20 @@ chip soc/intel/apollolake #| | 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[6] = { + .speed = I2C_SPEED_FAST, + .rise_time_ns = 66, + .fall_time_ns = 90, + .data_hold_time_ns = 350, + }, }" device domain 0 on -- cgit v1.2.3