diff options
| author | Sunwei Li <lisunwei@huaqin.corp-partner.google.com> | 2021-09-10 15:36:32 +0800 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2021-09-16 15:38:33 +0000 |
| commit | 86f0df4ca20bf69e773da2656d5526e4bf8aa076 (patch) | |
| tree | 5171d30239160d4924e41379fffbe5320a0fb29a | |
| parent | a90acbd6ddf979907d8afce2f56350862ef4427b (diff) | |
mb/google/dedede/var/cappy2: Configure I2C times for tp & codec
Configure I2C high / low time in the device tree to ensure I2C
CLK runs accurately between 380 kHz and 400 kHz.
Measured I2C frequency just as below after tuning:
touchpad:390kHz
codec:395.8kHz
BUG=b:199481261
BRANCH=dedede
TEST=Build and check after tuning I2C clock is between 380 kHz and 400 kHz
Signed-off-by: Sunwei Li <lisunwei@huaqin.corp-partner.google.com>
Change-Id: Ifadc3d19eb57fe6f67504be154c30df7bc0fee71
Reviewed-on: https://review.coreboot.org/c/coreboot/+/57551
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
| -rw-r--r-- | src/mainboard/google/dedede/variants/cappy2/overridetree.cb | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/mainboard/google/dedede/variants/cappy2/overridetree.cb b/src/mainboard/google/dedede/variants/cappy2/overridetree.cb index 7519a326ff..7e95edae0a 100644 --- a/src/mainboard/google/dedede/variants/cappy2/overridetree.cb +++ b/src/mainboard/google/dedede/variants/cappy2/overridetree.cb @@ -22,6 +22,8 @@ chip soc/intel/jasperlake register "common_soc_config" = "{ .i2c[0] = { .speed = I2C_SPEED_FAST, + .rise_time_ns = 255, + .fall_time_ns = 14, }, .i2c[1] = { .speed = I2C_SPEED_FAST, @@ -34,6 +36,8 @@ chip soc/intel/jasperlake }, .i2c[4] = { .speed = I2C_SPEED_FAST, + .rise_time_ns = 105, + .fall_time_ns = 4, }, }" |