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Diffstat (limited to 'src/mainboard/google/snow')
| -rw-r--r-- | src/mainboard/google/snow/ramstage.c | 13 |
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); |