From 4f6eccdcac841f48a6a4bac846840e2cb79a4ff3 Mon Sep 17 00:00:00 2001 From: Pan Sheng-Liang Date: Thu, 4 Oct 2018 16:17:22 +0800 Subject: mb/google/octopus: adjust Bobba I2C CLK under 400KHz Need to tune I2C bus 0/6/7 clock frequency under the 400KHz for digitizer, touchpad, and touchscreen. Bug=b:117126484 TEST=flash coreboot to the DUT and measure I2C bus 0/6/7 clock frequency whether can <400KHz Change-Id: Icb9592c688b864a21efd4963a4463845dfaa06fb Signed-off-by: Pan Sheng-Liang Reviewed-on: https://review.coreboot.org/28907 Reviewed-by: Justin TerAvest Reviewed-by: Aaron Durbin Reviewed-by: Paul Menzel Tested-by: build bot (Jenkins) --- .../google/octopus/variants/bobba/overridetree.cb | 41 ++++++++++++++++++++++ 1 file changed, 41 insertions(+) (limited to 'src') diff --git a/src/mainboard/google/octopus/variants/bobba/overridetree.cb b/src/mainboard/google/octopus/variants/bobba/overridetree.cb index acb1d50d76..662a3025ba 100644 --- a/src/mainboard/google/octopus/variants/bobba/overridetree.cb +++ b/src/mainboard/google/octopus/variants/bobba/overridetree.cb @@ -1,5 +1,46 @@ chip soc/intel/apollolake + # Intel Common SoC Config + #+-------------------+---------------------------+ + #| Field | Value | + #+-------------------+---------------------------+ + #| GSPI0 | cr50 TPM. Early init is | + #| | required to set up a BAR | + #| | for TPM communication | + #| | before memory is up | + #| I2C0 | Digitizer | + #| I2C5 | Audio | + #| I2C6 | Trackpad | + #| I2C7 | Touchscreen | + #+-------------------+---------------------------+ + register "common_soc_config" = "{ + .gspi[0] = { + .speed_mhz = 1, + .early_init = 1, + }, + .i2c[0] = { + .speed = I2C_SPEED_FAST, + .rise_time_ns = 88, + .fall_time_ns = 16, + }, + .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, + }, + .i2c[7] = { + .speed = I2C_SPEED_FAST, + .rise_time_ns = 44, + .fall_time_ns = 90, + }, + }" + device domain 0 on device pci 16.0 on chip drivers/i2c/hid -- cgit v1.2.3