[coreboot-gerrit] Change in coreboot[master]: mb/google/dedede/var/blipper: Configure I2C times for touchpad/touchp...

[Tao Xia (Code Review)]

Tao Xia has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/54249 )

Change subject: mb/google/dedede/var/blipper: Configure I2C times for touchpad/touchpanel/Codec
......................................................................

mb/google/dedede/var/blipper: Configure I2C times for touchpad/touchpanel/Codec

Configure I2C high / low time in device tree to ensure I2C
CLK runs accurately at I2C_SPEED_FAST (400 kHz).

Measured I2C frequency just as below after tuning:
touchpad:387 kHz
touchpanel:388 kHz
audio codec RT5682:391 kHz

BUG=b:187555396
BRANCH=dedede
TEST=Build and check after tuning I2C clock is under 400kHz

Signed-off-by: Tao Xia 
Change-Id: I8438e37be49f8a74f53fd8460110dac1a3f06993
---
M src/mainboard/google/dedede/variants/blipper/overridetree.cb
1 file changed, 18 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/49/54249/1

diff --git a/src/mainboard/google/dedede/variants/blipper/overridetree.cb b/src/mainboard/google/dedede/variants/blipper/overridetree.cb
index df3f9dd..40e35d7 100644
--- a/src/mainboard/google/dedede/variants/blipper/overridetree.cb
+++ b/src/mainboard/google/dedede/variants/blipper/overridetree.cb
@@ -21,18 +21,36 @@
    	},
    	.i2c[0] = {
    		.speed = I2C_SPEED_FAST,
+			.speed_config[0] = {
+				.speed = I2C_SPEED_FAST,
+				.scl_lcnt = 190,
+				.scl_hcnt = 100,
+				.sda_hold = 40,
+			}
    	},
    	.i2c[1] = {
    		.speed = I2C_SPEED_FAST,
    	},
    	.i2c[2] = {
    		.speed = I2C_SPEED_FAST,
+			.speed_config[0] = {
+				.speed = I2C_SPEED_FAST,
+				.scl_lcnt = 190,
+				.scl_hcnt = 100,
+				.sda_hold = 40,
+			}
    	},
    	.i2c[3] = {
    		.speed = I2C_SPEED_FAST,
    	},
    	.i2c[4] = {
    		.speed = I2C_SPEED_FAST,
+			.speed_config[0] = {
+				.speed = I2C_SPEED_FAST,
+				.scl_lcnt = 190,
+				.scl_hcnt = 100,
+				.sda_hold = 40,
+			}
    	},
    }"