From efe035183a1310c3bafc1b0ce6dbb20efc4ad949 Mon Sep 17 00:00:00 2001 From: Tony Huang Date: Fri, 19 May 2023 15:52:24 +0800 Subject: [PATCH] mb/google/nissa/var/yavilla: Config I2C frequency Measured the I2C frequency meets spec 1. I2C0 (TPM): 976.1 Khz 2. I2C1 (TouchScreen); 394.0 Khz 3. I2C2 (WCAM); 377.9 Khz 4. I2C3 (Audio): 390.0 Khz 5. I2C5 (Touchpad): 389.3 Khz BUG=b:283374537 BRANCH=firmware-nissa-15217.B TEST=emerge-nissa coreboot and check all I2C devices measurement result Change-Id: If6e3a4a2b1ac642561015a290e6579238c3c2b1b Signed-off-by: Tony Huang Reviewed-on: https://review.coreboot.org/c/coreboot/+/75353 Tested-by: build bot (Jenkins) Reviewed-by: Derek Huang --- .../brya/variants/yavilla/overridetree.cb | 30 +++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/src/mainboard/google/brya/variants/yavilla/overridetree.cb b/src/mainboard/google/brya/variants/yavilla/overridetree.cb index 447121bc81..6e6e0a9164 100644 --- a/src/mainboard/google/brya/variants/yavilla/overridetree.cb +++ b/src/mainboard/google/brya/variants/yavilla/overridetree.cb @@ -67,18 +67,48 @@ chip soc/intel/alderlake .i2c[0] = { .early_init = 1, .speed = I2C_SPEED_FAST_PLUS, + .speed_config[0] = { + .speed = I2C_SPEED_FAST_PLUS, + .scl_lcnt = 56, + .scl_hcnt = 30, + .sda_hold = 7, + } }, .i2c[1] = { .speed = I2C_SPEED_FAST, + .speed_config[0] = { + .speed = I2C_SPEED_FAST, + .scl_lcnt = 158, + .scl_hcnt = 79, + .sda_hold = 30, + } }, .i2c[2] = { .speed = I2C_SPEED_FAST, + .speed_config[0] = { + .speed = I2C_SPEED_FAST, + .scl_lcnt = 158, + .scl_hcnt = 79, + .sda_hold = 7, + } }, .i2c[3] = { .speed = I2C_SPEED_FAST, + .speed_config[0] = { + .speed = I2C_SPEED_FAST, + .scl_lcnt = 158, + .scl_hcnt = 79, + .sda_hold = 7, + } }, .i2c[5] = { .speed = I2C_SPEED_FAST, + .speed_config[0] = { + .speed = I2C_SPEED_FAST, + .scl_lcnt = 158, + .scl_hcnt = 79, + .sda_hold = 40, + } }, }"