From c3245274e960670fc7092a6676e3fb95ca8ea7fd Mon Sep 17 00:00:00 2001 From: Karthikeyan Ramasubramanian Date: Fri, 2 Aug 2024 09:41:34 -0600 Subject: mb/google/brox: Tune Touchpad I2C parameters Adjust Touchpad I2C fall time configuration such that it meets the I2C fast mode specification(<= 400KHz). BUG=b:328670295 TEST=Build Brox firmware and boot to OS. Confirm the I2C bus frequency(375 KHz), rise(650 ns) and fall(330 ns) times meet the specification. Change-Id: I0006bfb9bb5839ffa1248d9f2ea055160ed0936e Signed-off-by: Karthikeyan Ramasubramanian Reviewed-on: https://review.coreboot.org/c/coreboot/+/83755 Reviewed-by: Bob Moragues Tested-by: build bot (Jenkins) Reviewed-by: Jon Murphy --- src/mainboard/google/brox/variants/baseboard/brox/devicetree.cb | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'src/mainboard/google/brox') diff --git a/src/mainboard/google/brox/variants/baseboard/brox/devicetree.cb b/src/mainboard/google/brox/variants/baseboard/brox/devicetree.cb index 89c714d2bf..9fbf7437a8 100644 --- a/src/mainboard/google/brox/variants/baseboard/brox/devicetree.cb +++ b/src/mainboard/google/brox/variants/baseboard/brox/devicetree.cb @@ -103,7 +103,7 @@ chip soc/intel/alderlake .i2c[0] = { .speed = I2C_SPEED_FAST, .rise_time_ns = 650, - .fall_time_ns = 350, + .fall_time_ns = 330, .data_hold_time_ns = 50, }, .i2c[1] = { -- cgit v1.2.3