From 4d352fc93ff2356ff68716e42dcf0d554847b693 Mon Sep 17 00:00:00 2001
From: Koen Zandberg <koen@bergzand.net>
Date: Tue, 19 Mar 2019 20:14:31 +0100
Subject: [PATCH 1/2] usbdev: Extend with low level initialization functions

---
 drivers/include/periph/usbdev.h | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/drivers/include/periph/usbdev.h b/drivers/include/periph/usbdev.h
index d5bcd69ad4..115a613d6f 100644
--- a/drivers/include/periph/usbdev.h
+++ b/drivers/include/periph/usbdev.h
@@ -355,6 +355,22 @@ typedef struct usbdev_driver {
     int (*ready)(usbdev_ep_t *ep, size_t len);
 } usbdev_driver_t;
 
+/**
+ * @brief Low level USB peripheral driver initialization
+ *
+ * This function prepares all usbdev peripherals available for initialization
+ */
+void usbdev_init_lowlevel(void);
+
+/**
+ * @brief Retrieve usbdev context from the peripheral
+ *
+ * @param num   usbdev peripheral number to retrieve
+ *
+ * @returns     the usbdev context at index @p num
+ */
+usbdev_t *usbdev_get_ctx(unsigned num);
+
 /**
  * @brief Initialize the USB peripheral device
  *

From cf093c5a25a762d87ed9c3cbf5b55132d9af8a52 Mon Sep 17 00:00:00 2001
From: Koen Zandberg <koen@bergzand.net>
Date: Tue, 19 Mar 2019 20:16:28 +0100
Subject: [PATCH 2/2] periph: add low level usbdev initialization

---
 drivers/periph_common/init.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/periph_common/init.c b/drivers/periph_common/init.c
index a235eb7b65..4025f06310 100644
--- a/drivers/periph_common/init.c
+++ b/drivers/periph_common/init.c
@@ -35,6 +35,9 @@
 #ifdef MODULE_PERIPH_HWRNG
 #include "periph/hwrng.h"
 #endif
+#ifdef MODULE_PERIPH_USBDEV
+#include "periph/usbdev.h"
+#endif
 
 void periph_init(void)
 {
@@ -65,4 +68,8 @@ void periph_init(void)
 #ifdef MODULE_PERIPH_HWRNG
     hwrng_init();
 #endif
+
+#ifdef MODULE_PERIPH_USBDEV
+    usbdev_init_lowlevel();
+#endif
 }