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| author | Tony Huang <tony-huang@quanta.corp-partner.google.com> | 2019-04-23 22:05:01 +0800 |
|---|---|---|
| committer | Furquan Shaikh <furquan@google.com> | 2019-04-24 00:55:32 +0000 |
| commit | 8725e5f639cb71f405005586e01d6efa0042dc4b (patch) | |
| tree | 89923c5fee7069a36155f7ade30d56a0369aa564 | |
| parent | 283fdcfbc26db3d1d5475544f2849ee6f19f49d5 (diff) | |
| download | coreboot-8725e5f639cb71f405005586e01d6efa0042dc4b.tar.xz | |
mb/google/octopus: I2C clock tuning for bloog
Tune I2C params for I2C buses 5, 6, and 7 to ensure that the
frequency does not exceed 400KHz.
BUG=b:131132499, b:128998988
BRANCH=octopus
TEST=emerge-octopus coreboot chromeos-bootimage and measured frequency
under 400 KHz
Change-Id: Ie8cfba72a0654402ccb0274c00b44fbfa2deea21
Signed-off-by: Tony Huang <tony-huang@quanta.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32404
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Reviewed-by: Justin TerAvest <teravest@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
| -rw-r--r-- | src/mainboard/google/octopus/variants/bloog/overridetree.cb | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/mainboard/google/octopus/variants/bloog/overridetree.cb b/src/mainboard/google/octopus/variants/bloog/overridetree.cb index 21a10f74c8..cf70bb3108 100644 --- a/src/mainboard/google/octopus/variants/bloog/overridetree.cb +++ b/src/mainboard/google/octopus/variants/bloog/overridetree.cb @@ -49,12 +49,32 @@ chip soc/intel/apollolake #| | required to set up a BAR | #| | for TPM communication | #| | before memory is up | + #| I2C5 | Audio | + #| I2C6 | Trackpad | + #| I2C7 | Touchscreen | #+-------------------+---------------------------+ register "common_soc_config" = "{ .gspi[0] = { .speed_mhz = 1, .early_init = 1, }, + .i2c[5] = { + .speed = I2C_SPEED_FAST, + .rise_time_ns = 104, + .fall_time_ns = 52, + }, + .i2c[6] = { + .speed = I2C_SPEED_FAST, + .rise_time_ns = 66, + .fall_time_ns = 90, + .data_hold_time_ns = 350, + }, + .i2c[7] = { + .speed = I2C_SPEED_FAST, + .rise_time_ns = 44, + .fall_time_ns = 90, + }, + }" device domain 0 on |