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| author | Ian Feng <ian_feng@compal.corp-partner.google.com> | 2021-10-12 14:17:37 +0800 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2021-10-15 12:59:26 +0000 |
| commit | 82130369a1c8b06b0aa5e804096d93b98ffce7cc (patch) | |
| tree | 36da47577ee7a61f9364ef62ef68929dc82bca1c /src/mainboard/google/dedede/variants/corori | |
| parent | 595eaccb23994aa2d8b081c78978e3f8181099eb (diff) | |
| download | coreboot-82130369a1c8b06b0aa5e804096d93b98ffce7cc.tar.gz coreboot-82130369a1c8b06b0aa5e804096d93b98ffce7cc.tar.bz2 coreboot-82130369a1c8b06b0aa5e804096d93b98ffce7cc.zip | |
mb/google/dedede/var/corori: Configure I2C times for Touchpad
Configure I2C high / low time in the device tree to ensure Touchpad
I2C CLK runs accurately between 380 kHz and 400 kHz.
Measured I2C frequency just as below after tuning:
Touch Pad CLK: 389.2 KHz
BUG=b:202787528
TEST=Build and check after tuning I2C clock is between 380 kHz and 400 kHz
Change-Id: I0f9d062fc611de0062a39849aee1174268391682
Signed-off-by: Ian Feng <ian_feng@compal.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58238
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Henry Sun <henrysun@google.com>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Diffstat (limited to 'src/mainboard/google/dedede/variants/corori')
| -rw-r--r-- | src/mainboard/google/dedede/variants/corori/overridetree.cb | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/mainboard/google/dedede/variants/corori/overridetree.cb b/src/mainboard/google/dedede/variants/corori/overridetree.cb index d322000cbd21..f7899a614050 100644 --- a/src/mainboard/google/dedede/variants/corori/overridetree.cb +++ b/src/mainboard/google/dedede/variants/corori/overridetree.cb @@ -39,6 +39,8 @@ chip soc/intel/jasperlake register "common_soc_config" = "{ .i2c[0] = { .speed = I2C_SPEED_FAST, + .rise_time_ns = 255, + .fall_time_ns = 14, }, .i2c[4] = { .speed = I2C_SPEED_FAST, |