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-rw-r--r--src/mainboard/google/snow/ramstage.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/src/mainboard/google/snow/ramstage.c b/src/mainboard/google/snow/ramstage.c
index 1cd84e841d..54d13d38f4 100644
--- a/src/mainboard/google/snow/ramstage.c
+++ b/src/mainboard/google/snow/ramstage.c
@@ -198,6 +198,16 @@ static struct video_info snow_dp_video_info = {
#define EXYNOS5250_DP1_BASE 0x145b0000
#define SNOW_MAX_DP_TRIES 5
+/*
+ * This function disables the USB3.0 PLL to save power
+ */
+static void disable_usb30_pll(void)
+{
+ enum exynos5_gpio_pin usb3_pll_l = GPIO_Y11;
+
+ gpio_direction_output(usb3_pll_l, 0);
+}
+
/* this happens after cpu_init where exynos resources are set */
static void mainboard_init(device_t dev)
{
@@ -215,6 +225,9 @@ static void mainboard_init(device_t dev)
/* Clock Gating all the unused IP's to save power */
clock_gate();
+ /* Disable USB3.0 PLL to save 250mW of power */
+ disable_usb30_pll();
+
snow_lcd_vdd();
do {
udelay(50);