From 6b3f7a91457f04ba4457f10928c20f5baad4deb7 Mon Sep 17 00:00:00 2001 From: Ren Kuo Date: Fri, 1 Jul 2022 18:18:53 +0800 Subject: mb/google/brya/var/volmar: I2C timing fine tune Configure the I2C bus timing for all enabled I2C buses. BUG=b:237751906 TEST=Verify the build for volmar board and measure the freq is under 400KHz Signed-off-by: Ren Kuo Change-Id: Iffa128146f5d8bec6dd3d5c2d1e7efd96895dc6b Reviewed-on: https://review.coreboot.org/c/coreboot/+/65604 Reviewed-by: David Wu Tested-by: build bot (Jenkins) --- src/mainboard/google/brya/variants/volmar/overridetree.cb | 13 ++----------- 1 file changed, 2 insertions(+), 11 deletions(-) (limited to 'src/mainboard/google/brya/variants/volmar') diff --git a/src/mainboard/google/brya/variants/volmar/overridetree.cb b/src/mainboard/google/brya/variants/volmar/overridetree.cb index b7a8b82aed..ff2757aefb 100644 --- a/src/mainboard/google/brya/variants/volmar/overridetree.cb +++ b/src/mainboard/google/brya/variants/volmar/overridetree.cb @@ -56,34 +56,25 @@ chip soc/intel/alderlake register "common_soc_config" = "{ .i2c[0] = { .speed = I2C_SPEED_FAST, - .rise_time_ns = 650, - .fall_time_ns = 400, - .data_hold_time_ns = 50, }, .i2c[1] = { .early_init = 1, .speed = I2C_SPEED_FAST, - .rise_time_ns = 600, + .rise_time_ns = 550, .fall_time_ns = 400, .data_hold_time_ns = 50, }, .i2c[2] = { .speed = I2C_SPEED_FAST, - .rise_time_ns = 650, - .fall_time_ns = 400, - .data_hold_time_ns = 50, }, .i2c[3] = { .speed = I2C_SPEED_FAST, - .rise_time_ns = 650, + .rise_time_ns = 550, .fall_time_ns = 400, .data_hold_time_ns = 50, }, .i2c[5] = { .speed = I2C_SPEED_FAST, - .rise_time_ns = 650, - .fall_time_ns = 400, - .data_hold_time_ns = 50, }, }" -- cgit v1.2.3