summaryrefslogtreecommitdiff
path: root/src
diff options
context:
space:
mode:
Diffstat (limited to 'src')
-rw-r--r--src/mainboard/google/gru/mainboard.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/src/mainboard/google/gru/mainboard.c b/src/mainboard/google/gru/mainboard.c
index b9d5355bf1..0b55e7faf7 100644
--- a/src/mainboard/google/gru/mainboard.c
+++ b/src/mainboard/google/gru/mainboard.c
@@ -29,6 +29,16 @@
#include "board.h"
+/*
+ * 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.
+ */
+static void deassert_wifi_power(void)
+{
+ gpio_output(GPIO(1, B, 3), 0); /* Assert WLAN_MODULE_RST# */
+}
+
static void configure_emmc(void)
{
/* Host controller does not support programmable clock generator.
@@ -237,6 +247,7 @@ static void setup_usb(void)
static void mainboard_init(device_t dev)
{
+ deassert_wifi_power();
configure_sdmmc();
configure_emmc();
configure_codec();