diff options
| -rw-r--r-- | src/mainboard/google/gru/mainboard.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/mainboard/google/gru/mainboard.c b/src/mainboard/google/gru/mainboard.c index 74c83bcded..099a3d9dcf 100644 --- a/src/mainboard/google/gru/mainboard.c +++ b/src/mainboard/google/gru/mainboard.c @@ -33,6 +33,15 @@ #include "board.h" /* + * We have to drive the stronger pull-up within 1 second of powering up the + * touchpad to prevent its firmware from falling into recovery. + */ +static void configure_touchpad(void) +{ + gpio_output(GPIO(3, B, 4), 1); /* TP's I2C pull-up rail */ +} + +/* * Wifi's PDN/RST line is pulled down by its (unpowered) voltage rails, but * this reset pin is pulled up by default. Let's drive it low as early as we * can. @@ -313,6 +322,7 @@ static void setup_usb(int port) static void mainboard_init(device_t dev) { deassert_wifi_power(); + configure_touchpad(); configure_sdmmc(); configure_emmc(); configure_codec(); |