ARM: atmel: sama5d4: add usb device initial code

Signed-off-by: Bo Shen <voice.shen@atmel.com>

arch/arm/cpu/armv7/at91/sama5d4_devices.c

@@ -6,6 +6,10 @@
  */
 
 #include <common.h>
+#include <asm/io.h>
+#include <asm/arch/at91_common.h>
+#include <asm/arch/at91_pmc.h>
+#include <asm/arch/clk.h>
 #include <asm/arch/sama5d4.h>
 
 char *get_cpu_name()
@@ -28,3 +32,15 @@ char *get_cpu_name()
 	else
 		return "Unknown CPU type";
 }
+
+#ifdef CONFIG_USB_GADGET_ATMEL_USBA
+void at91_udp_hw_init(void)
+{
+	struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+
+	/* Enable UPLL clock */
+	writel(AT91_PMC_UPLLEN | AT91_PMC_BIASEN, &pmc->uckr);
+	/* Enable UDPHS clock */
+	at91_periph_clk_enable(ATMEL_ID_UDPHS);
+}
+#endif