From 632283092c168f2465acbe56cf0a8bb7fc17e93f Mon Sep 17 00:00:00 2001 From: Peichao Wang Date: Mon, 9 Sep 2019 09:10:54 +0800 Subject: 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 Change-Id: I6b2a51a866e57d13fe528452e4efdcf17a72317f Reviewed-on: https://review.coreboot.org/c/coreboot/+/35298 Reviewed-by: Martin Roth Tested-by: build bot (Jenkins) --- src/mainboard/google/kahlee/variants/treeya/devicetree.cb | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'src/mainboard/google/kahlee/variants') 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 | \ -- cgit v1.2.3