diff options
| -rw-r--r-- | board/cr50/board.c | 4 | ||||
| -rw-r--r-- | board/cr50/rdd.c | 16 |
2 files changed, 17 insertions, 3 deletions
diff --git a/board/cr50/board.c b/board/cr50/board.c index 37f2f4dc9e..0f801de447 100644 --- a/board/cr50/board.c +++ b/board/cr50/board.c @@ -178,6 +178,10 @@ void board_configure_deep_sleep_wakepins(void) GWRITE_FIELD(PINMUX, EXITEN0, DIOA12, 0); /* SPS_CS_L */ /* TODO remove i2cs wake event */ + /* Remove the pulldown on EC uart tx and disable the input */ + GWRITE_FIELD(PINMUX, DIOB5_CTL, PD, 0); + GWRITE_FIELD(PINMUX, DIOB5_CTL, IE, 0); + /* * DIOA3 is GPIO_DETECT_AP which is used to detect if the AP is in S0. * If the AP is in s0, cr50 should not be in deep sleep so wake up. diff --git a/board/cr50/rdd.c b/board/cr50/rdd.c index a9ed843f78..1275b0dcde 100644 --- a/board/cr50/rdd.c +++ b/board/cr50/rdd.c @@ -52,13 +52,23 @@ int uartn_enabled(int uart) return GREAD(PINMUX, DIOB5_SEL); } -/* Connect the UART pin to the given signal */ +/** + * Connect the UART pin to the given signal + * + * @param uart the uart peripheral number + * @param signal the pinmux selector value for the gpio or peripheral + * function. 0 to disable the output. + */ static void uart_select_tx(int uart, int signal) { - if (uart == UART_AP) + if (uart == UART_AP) { GWRITE(PINMUX, DIOA7_SEL, signal); - else + } else { GWRITE(PINMUX, DIOB5_SEL, signal); + + /* Remove the pulldown when we are driving the signal */ + GWRITE_FIELD(PINMUX, DIOB5_CTL, PD, signal ? 0 : 1); + } } static int servo_is_connected(void) |