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authorTony Huang <tony-huang@quanta.corp-partner.google.com>2019-04-23 22:05:01 +0800
committerFurquan Shaikh <furquan@google.com>2019-04-24 00:55:32 +0000
commit8725e5f639cb71f405005586e01d6efa0042dc4b (patch)
tree89923c5fee7069a36155f7ade30d56a0369aa564 /src/mainboard/google
parent283fdcfbc26db3d1d5475544f2849ee6f19f49d5 (diff)
downloadcoreboot-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>
Diffstat (limited to 'src/mainboard/google')
-rw-r--r--src/mainboard/google/octopus/variants/bloog/overridetree.cb20
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