GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/bootloader/u-boot-2020.01/board/intel/minnowmax/minnowmax.c

@@ -0,0 +1,60 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2015, Google, Inc
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <asm/gpio.h>
+#include <dm/device-internal.h>
+#include <dm/uclass-internal.h>
+
+#define GPIO_BANKE_NAME		"gpioe"
+
+int misc_init_r(void)
+{
+	struct udevice *dev;
+	struct gpio_desc desc;
+	int ret;
+
+	/*
+	 * Turn on USB VBUS for the two USB ports on the board.
+	 * Each port's VBUS is controlled by a GPIO pin.
+	 */
+
+	ret = uclass_find_device_by_name(UCLASS_GPIO, GPIO_BANKE_NAME, &dev);
+	if (ret) {
+		debug("%s: GPIO %s device cannot be not found (ret=%d)\n",
+		      __func__, GPIO_BANKE_NAME, ret);
+		return ret;
+	}
+
+	ret = device_probe(dev);
+	if (ret) {
+		debug("%s: GPIO %s device probe failed (ret=%d)\n",
+		      __func__, GPIO_BANKE_NAME, ret);
+		return ret;
+	}
+
+	desc.dev = dev;
+	desc.flags = GPIOD_IS_OUT;
+
+	/* GPIO E8 controls the bottom port */
+	desc.offset = 8;
+
+	ret = dm_gpio_request(&desc, "usb_host_en0");
+	if (ret)
+		return ret;
+	dm_gpio_set_value(&desc, 1);
+
+	/* GPIO E9 controls the upper port */
+	desc.offset = 9;
+
+	ret = dm_gpio_request(&desc, "usb_host_en1");
+	if (ret)
+		return ret;
+
+	dm_gpio_set_value(&desc, 1);
+
+	return 0;
+}