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authorSeunghwan Kim <sh_.kim@samsung.com>2019-01-25 09:38:40 +0900
committerPatrick Georgi <pgeorgi@google.com>2019-01-28 13:36:49 +0000
commit6dda1e05565785e6fa41b33957c1096d47ef7c77 (patch)
tree00b1dc080d89f080ab21bc3d1ee5c2e199293da7
parent36ced10364faf04673a2fd3ddce74ebf9e361498 (diff)
downloadcoreboot-6dda1e05565785e6fa41b33957c1096d47ef7c77.tar.xz
mainboard/google/octopus/variants/casta: Decrease touchpad I2C CLK frequency
ELAN touchpad supports up to 400KHz, so we need to limit its CLK frequency to 400HKz. BUG=b:123376618 BRANCH=octopus TEST=built and verified touchpad I2C clk frequency gets be lower than 400KHz Change-Id: If7a43fe20c7e5abdf23c8c36e34c072c371563bf Signed-off-by: Seunghwan Kim <sh_.kim@samsung.com> Reviewed-on: https://review.coreboot.org/c/31085 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Furquan Shaikh <furquan@google.com>
-rw-r--r--src/mainboard/google/octopus/variants/casta/overridetree.cb9
1 files changed, 8 insertions, 1 deletions
diff --git a/src/mainboard/google/octopus/variants/casta/overridetree.cb b/src/mainboard/google/octopus/variants/casta/overridetree.cb
index 8915e1ae9e..d70a6ea3f9 100644
--- a/src/mainboard/google/octopus/variants/casta/overridetree.cb
+++ b/src/mainboard/google/octopus/variants/casta/overridetree.cb
@@ -1,5 +1,4 @@
chip soc/intel/apollolake
-
# Intel Common SoC Config
#+-------------------+---------------------------+
#| Field | Value |
@@ -8,12 +7,20 @@ chip soc/intel/apollolake
#| | required to set up a BAR |
#| | for TPM communication |
#| | before memory is up |
+ #| I2C5 | Audio |
+ #| I2C6 | Trackpad |
#+-------------------+---------------------------+
register "common_soc_config" = "{
.gspi[0] = {
.speed_mhz = 1,
.early_init = 1,
},
+ .i2c[6] = {
+ .speed = I2C_SPEED_FAST,
+ .rise_time_ns = 66,
+ .fall_time_ns = 90,
+ .data_hold_time_ns = 350,
+ },
}"
device domain 0 on