herobrine: Assert gpio for USB_HUB_LDO_EN

Some herobrine variants have USB hub powered by discrete LDO that is
controlled by USB_HUB_LDO_EN gpio. Assert the GPIO on boot.

BUG=b:182963902
TEST=Validated on qualcomm sc7280 development board.

Signed-off-by: Sandeep Maheswaram <sanm@codeaurora.org>
Change-Id: Ia94e046f9eb0d3ce593f3445e0203a7391c14de2
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55378
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>

src/mainboard/google/herobrine/board.h

@@ -9,6 +9,13 @@
 
 #define GPIO_SD_CD_L	GPIO(91)
 
+#if CONFIG(BOARD_GOOGLE_SENOR) || CONFIG(BOARD_GOOGLE_PIGLIN) || CONFIG(BOARD_GOOGLE_HOGLIN)
+#define USB_HUB_LDO_EN		GPIO(157)
+#else
+/* For Herobrine board and all variants */
+#define USB_HUB_LDO_EN		GPIO(24)
+#endif
+
 #define QCOM_SC7280_SKU1 0x0
 #define QCOM_SC7280_SKU2 0x1
 #define QCOM_SC7280_SKU3 0x2

src/mainboard/google/herobrine/mainboard.c

@@ -24,6 +24,9 @@ static struct usb_board_data usb0_board_data = {
 
 static void setup_usb(void)
 {
+	/* Assert EN_PP3300_HUB for those board variants that use it. */
+	gpio_output(USB_HUB_LDO_EN, 1);
+
 	setup_usb_host0(&usb0_board_data);
 }