diff options
| author | Tony Huang <tony-huang@quanta.corp-partner.google.com> | 2022-08-31 17:38:48 +0800 |
|---|---|---|
| committer | Martin Roth <martin.roth@amd.corp-partner.google.com> | 2022-09-09 03:39:48 +0000 |
| commit | 8754965db1d308a4e66e63fc85e39710f18f7f92 (patch) | |
| tree | 77087090a49590a0a9c79889392a48289c5f6631 | |
| parent | fa03a9f059cab6bdec8235fee95d68329ed79315 (diff) | |
mb/google/dedede/var/shotzo: Config I2C times for touchscreen/audio
Config I2C high / low time in device tree to ensure I2C
CLK runs accurately at I2C_SPEED_FAST (400 kHz).
EE measured touchscreen/audio runs at 385.5/397.9kHz after tuning.
BUG=b:244403643
BRANCH=firmware-dedede-13606.B
TEST=Build and check after tuning I2C clock is under 400kHz
Change-Id: I7d9503e5f92295432e31f09ae791eaa18eac9d4d
Signed-off-by: Tony Huang <tony-huang@quanta.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/67242
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Zhuohao Lee <zhuohao@google.com>
| -rw-r--r-- | src/mainboard/google/dedede/variants/shotzo/overridetree.cb | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/mainboard/google/dedede/variants/shotzo/overridetree.cb b/src/mainboard/google/dedede/variants/shotzo/overridetree.cb index 91848e58b0..079bc184a3 100644 --- a/src/mainboard/google/dedede/variants/shotzo/overridetree.cb +++ b/src/mainboard/google/dedede/variants/shotzo/overridetree.cb @@ -22,9 +22,19 @@ chip soc/intel/jasperlake }, .i2c[2] = { .speed = I2C_SPEED_FAST, + .speed_config[0] = { + .speed = I2C_SPEED_FAST, + .scl_lcnt = 185, + .scl_hcnt = 95, + } }, .i2c[4] = { .speed = I2C_SPEED_FAST, + .speed_config[0] = { + .speed = I2C_SPEED_FAST, + .scl_lcnt = 185, + .scl_hcnt = 95, + } }, }" |