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authorCarl Yang <carl_yang@asus.corp-partner.google.com>2018-11-20 11:55:56 +0800
committerPatrick Georgi <pgeorgi@google.com>2018-11-27 08:51:07 +0000
commitf728852b56963d3d3e95231032343db6182c0bab (patch)
treedfcd50879eb52bde094899fcb151fd90d0ef9c5b /src
parent00d0ddb62b82ff3c937676d2a3ace43a899a6cff (diff)
downloadcoreboot-f728852b56963d3d3e95231032343db6182c0bab.tar.xz
mainboard/google/octopus/variants/ampton: Decrease I2C CLK frequency
The touchpad and touch-panel CLK frequency should be smaller than 400 kHz which described in spec. Overwrite i2c speed parameters by overridetree.cb BUG=b:119540449 BRANCH=master TEST=emerge-octopus coreboot chromeos-bootimage flash bios and check the touchpad i2c frequency meets the spec. Change-Id: I32c3e1bbfc2cdf39e9b7865a69996e54346d5f93 Signed-off-by: Carl Yang <carl_yang@asus.corp-partner.google.com> Reviewed-on: https://review.coreboot.org/c/29694 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Justin TerAvest <teravest@chromium.org> Reviewed-by: Furquan Shaikh <furquan@google.com>
Diffstat (limited to 'src')
-rw-r--r--src/mainboard/google/octopus/variants/ampton/overridetree.cb28
1 files changed, 28 insertions, 0 deletions
diff --git a/src/mainboard/google/octopus/variants/ampton/overridetree.cb b/src/mainboard/google/octopus/variants/ampton/overridetree.cb
index b93a5e55e0..46d4dcdb22 100644
--- a/src/mainboard/google/octopus/variants/ampton/overridetree.cb
+++ b/src/mainboard/google/octopus/variants/ampton/overridetree.cb
@@ -1,5 +1,33 @@
chip soc/intel/apollolake
+ register "common_soc_config" = "{
+ .gspi[0] = {
+ .speed_mhz = 1,
+ .early_init = 1,
+ },
+ .i2c[0] = {
+ .speed = I2C_SPEED_FAST,
+ .rise_time_ns = 152,
+ .fall_time_ns = 30,
+ },
+ .i2c[5] = {
+ .speed = I2C_SPEED_FAST,
+ .rise_time_ns = 104,
+ .fall_time_ns = 52,
+ },
+ .i2c[6] = {
+ .speed = I2C_SPEED_FAST,
+ .rise_time_ns = 70,
+ .fall_time_ns = 127,
+ .data_hold_time_ns = 350,
+ },
+ .i2c[7] = {
+ .speed = I2C_SPEED_FAST,
+ .rise_time_ns = 30,
+ .fall_time_ns = 127,
+ .data_hold_time_ns = 350,
+ },
+ }"
device domain 0 on
device pci 16.0 on
chip drivers/i2c/hid