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| author | Tao Xia <xiatao5@huaqin.corp-partner.google.com> | 2021-02-27 15:17:24 +0800 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2021-03-01 08:21:10 +0000 |
| commit | bda338a1be38a50fae86a2e02ce8dac8bb9eb3f0 (patch) | |
| tree | 2d2783b633c73a13e4727e3226cd60bf86e014a2 /src | |
| parent | a03b18012db5277f77b68b4c0d58e0672b943adc (diff) | |
| download | coreboot-bda338a1be38a50fae86a2e02ce8dac8bb9eb3f0.tar.gz coreboot-bda338a1be38a50fae86a2e02ce8dac8bb9eb3f0.tar.bz2 coreboot-bda338a1be38a50fae86a2e02ce8dac8bb9eb3f0.zip | |
mb/google/dedede/var/sasukette: Configure I2C times for touchpad/codec/AMP
Configure I2C high / low time in device tree to ensure I2C
CLK runs accurately at I2C_SPEED_FAST (400 kHz).
Measured I2C frequency just as below after tuning:
touchpad:372 kHz
audio codec RT5682:386.8 kHz
speaker AMP L:387.5 kHz
speaker AMP R:388.9 kHz
BUG=b:181342340
BRANCH=dedede
TEST=Build and check after tuning I2C clock is under 400kHz
Signed-off-by: Tao Xia <xiatao5@huaqin.corp-partner.google.com>
Change-Id: I05d78c088190e349281a34b2aeed39ae8d867dc2
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51112
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src')
| -rw-r--r-- | src/mainboard/google/dedede/variants/sasukette/overridetree.cb | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/mainboard/google/dedede/variants/sasukette/overridetree.cb b/src/mainboard/google/dedede/variants/sasukette/overridetree.cb index 2b310ce5298f..fe7a2dd27edc 100644 --- a/src/mainboard/google/dedede/variants/sasukette/overridetree.cb +++ b/src/mainboard/google/dedede/variants/sasukette/overridetree.cb @@ -21,6 +21,12 @@ chip soc/intel/jasperlake }, .i2c[0] = { .speed = I2C_SPEED_FAST, + .speed_config[0] = { + .speed = I2C_SPEED_FAST, + .scl_lcnt = 185, + .scl_hcnt = 95, + .sda_hold = 40, + } }, .i2c[1] = { .speed = I2C_SPEED_FAST, @@ -33,6 +39,12 @@ chip soc/intel/jasperlake }, .i2c[4] = { .speed = I2C_SPEED_FAST, + .speed_config[0] = { + .speed = I2C_SPEED_FAST, + .scl_lcnt = 185, + .scl_hcnt = 95, + .sda_hold = 40, + } }, }" |