diff options
| author | Shelley Chen <shchen@chromium.org> | 2018-01-22 10:26:31 -0800 |
|---|---|---|
| committer | Shelley Chen <shchen@google.com> | 2018-01-23 18:52:43 +0000 |
| commit | 8bd8cd3a222bb8d54fd2510728c87dc6909b287c (patch) | |
| tree | 3041832b3e1ffabf546db7d5ce812ac3a3bea94a | |
| parent | 65d2754e1aaa4e90059b65fac3c00d847e2e465f (diff) | |
| download | coreboot-8bd8cd3a222bb8d54fd2510728c87dc6909b287c.tar.xz | |
mainboard/google/fizz: Tune audio i2c parameters
Tune I2C params for I2C bus 5 to ensure that the frequency does not
exceed 400KHz.
BUG=b:65058277
BRANCH=None
TEST=Measured bus frequency for audio <= 400MHz
Change-Id: I18bca023a6a0fe21e6f46f8688264d3c04d77f25
Signed-off-by: Shelley Chen <shchen@chromium.org>
Reviewed-on: https://review.coreboot.org/23359
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
| -rw-r--r-- | src/mainboard/google/fizz/devicetree.cb | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/mainboard/google/fizz/devicetree.cb b/src/mainboard/google/fizz/devicetree.cb index 81b5dc5603..8cf4e52fb9 100644 --- a/src/mainboard/google/fizz/devicetree.cb +++ b/src/mainboard/google/fizz/devicetree.cb @@ -247,6 +247,17 @@ chip soc/intel/skylake .early_init = 1, }" + # audio + register "i2c[5]" = "{ + .speed = I2C_SPEED_FAST, + .speed_config[0] = { + .speed = I2C_SPEED_FAST, + .scl_lcnt = 194, + .scl_hcnt = 100, + .sda_hold = 36, + }, + }" + # Must leave UART0 enabled or SD/eMMC will not work as PCI register "SerialIoDevMode" = "{ [PchSerialIoIndexI2C0] = PchSerialIoDisabled, |