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authorPeichao Wang <peichao.wang@bitland.corp-partner.google.com>2019-09-09 09:10:54 +0800
committerPatrick Georgi <pgeorgi@google.com>2019-09-10 12:11:30 +0000
commit632283092c168f2465acbe56cf0a8bb7fc17e93f (patch)
treec60ecdc9ea74b7d1b1de987001c2cb68874462da
parent203061c24aba584edbd54dfe634ca1038c5e1ac1 (diff)
downloadcoreboot-632283092c168f2465acbe56cf0a8bb7fc17e93f.tar.xz
mb/google/kahlee/treeya: Tune I2C bus 1, 2 and 3 clock
Tune I2C bus 1, 2 and 3 clock and make them meet spec. BUG=b:140665478 TEST==flash coreboot to the DUT and measure I2C bus 1,2,3 clock frequency less than 400KHz Signed-off-by: Peichao.Wang <peichao.wang@bitland.corp-partner.google.com> Change-Id: I6b2a51a866e57d13fe528452e4efdcf17a72317f Reviewed-on: https://review.coreboot.org/c/coreboot/+/35298 Reviewed-by: Martin Roth <martinroth@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
-rw-r--r--src/mainboard/google/kahlee/variants/treeya/devicetree.cb10
1 files changed, 5 insertions, 5 deletions
diff --git a/src/mainboard/google/kahlee/variants/treeya/devicetree.cb b/src/mainboard/google/kahlee/variants/treeya/devicetree.cb
index beb99e0a7a..2e25340b6e 100644
--- a/src/mainboard/google/kahlee/variants/treeya/devicetree.cb
+++ b/src/mainboard/google/kahlee/variants/treeya/devicetree.cb
@@ -35,22 +35,22 @@ chip soc/amd/stoneyridge
register "i2c[1]" = "{
.early_init = 1,
.speed = I2C_SPEED_FAST,
- .rise_time_ns = 62,
+ .rise_time_ns = 3,
.fall_time_ns = 2,
}"
# Enable I2C2 for trackpad, pen at 400kHz
register "i2c[2]" = "{
.speed = I2C_SPEED_FAST,
- .rise_time_ns = 170,
- .fall_time_ns = 91,
+ .rise_time_ns = 3,
+ .fall_time_ns = 2,
}"
# Enable I2C3 for touchscreen at 400kHz
register "i2c[3]" = "{
.speed = I2C_SPEED_FAST,
- .rise_time_ns = 84,
- .fall_time_ns = 50,
+ .rise_time_ns = 16,
+ .fall_time_ns = 8,
}"
register "i2c_scl_reset" = "GPIO_I2C0_SCL | GPIO_I2C1_SCL | \