diff options
| author | Nicolas Boichat <drinkcat@google.com> | 2017-03-08 11:24:53 -0800 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2017-03-10 15:11:56 -0800 |
| commit | 2a149154c4e5d06aa9fc3a007cca05890e09e583 (patch) | |
| tree | 7a690af009377bf5b9791bcf4365bda39c470c48 /board | |
| parent | 7277708e43195e8ea4d83c649de2d8c4a144b90a (diff) | |
| download | chrome-ec-2a149154c4e5d06aa9fc3a007cca05890e09e583.tar.gz | |
hammer: Enable internal pull-up on UART RX line
Prevent spurious wake when servo is not connected.
BRANCH=none
BUG=b:36119938
TEST=Measure pull up value with a multimeter when servo is not
connected: value around 30k when host in S0 and S3.
Change-Id: I8bd54e4dcfd5c65f1f0cd32ffd4a70cedb979cc2
Reviewed-on: https://chromium-review.googlesource.com/452652
Commit-Ready: Nicolas Boichat <drinkcat@chromium.org>
Tested-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Diffstat (limited to 'board')
| -rw-r--r-- | board/hammer/gpio.inc | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/board/hammer/gpio.inc b/board/hammer/gpio.inc index bc8dbdfd0b..6ab26af4ec 100644 --- a/board/hammer/gpio.inc +++ b/board/hammer/gpio.inc @@ -52,7 +52,7 @@ GPIO(WP_L, PIN(A, 13), GPIO_INPUT) /* Unimplemented signals since we are not an EC */ UNIMPLEMENTED(ENTERING_RW) -ALTERNATE(PIN_MASK(A, 0x0600), 1, MODULE_UART, 0) /* USART1: PA09/PA10 - Servo stm32 console UART */ +ALTERNATE(PIN_MASK(A, 0x0600), 1, MODULE_UART, GPIO_PULL_UP) /* USART1: PA09/PA10 - Servo stm32 console UART */ ALTERNATE(PIN_MASK(B, 0x00c0), 1, MODULE_I2C, 0) /* I2C MASTER:PB6/7 GPIO_ODR_HIGH */ |