John Su has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/37230 )
Change subject: mb/google/drallion/variants/drallion: Adjust all I2C CLK to meet spec ......................................................................
mb/google/drallion/variants/drallion: Adjust all I2C CLK to meet spec
After adjustment on Drallion Touch Pad CLK: KHz Touch Screen CLK: KHz H1 CLK: KHz
BUG=b:144245601 BRANCH=master TEST=emerge-drallion coreboot chromeos-bootimage measure by scope with drallion.
Change-Id: Id669d7199bc6ed4b55d7542f095c6c8baf00f984 Signed-off-by: John Su john_su@compal.corp-partner.google.com --- M src/mainboard/google/drallion/variants/drallion/devicetree.cb 1 file changed, 6 insertions(+), 6 deletions(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/30/37230/1
diff --git a/src/mainboard/google/drallion/variants/drallion/devicetree.cb b/src/mainboard/google/drallion/variants/drallion/devicetree.cb index ed44f4f..fa2ec48 100644 --- a/src/mainboard/google/drallion/variants/drallion/devicetree.cb +++ b/src/mainboard/google/drallion/variants/drallion/devicetree.cb @@ -174,20 +174,20 @@ .chipset_lockdown = CHIPSET_LOCKDOWN_COREBOOT, .i2c[0] = { .speed = I2C_SPEED_FAST, - .rise_time_ns = 52, - .fall_time_ns = 110, + .rise_time_ns = 180, + .fall_time_ns = 200, }, .i2c[1] = { .speed = I2C_SPEED_FAST, - .rise_time_ns = 52, - .fall_time_ns = 110, + .rise_time_ns = 30, + .fall_time_ns = 80, .data_hold_time_ns = 330, }, .i2c[4] = { .early_init = 1, .speed = I2C_SPEED_FAST, - .rise_time_ns = 36, - .fall_time_ns = 99, + .rise_time_ns = 30, + .fall_time_ns = 60, }, }"