diff --git a/arch/arm/mach-uniphier/debug-uart/debug-uart.c b/arch/arm/mach-uniphier/debug-uart/debug-uart.c
new file mode 100644
index 0000000..d884785
--- /dev/null
+++ b/arch/arm/mach-uniphier/debug-uart/debug-uart.c
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2016 Masahiro Yamada <yamada.masahiro@socionext.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <debug_uart.h>
+#include <linux/io.h>
+#include <linux/serial_reg.h>
+
+#include "../soc-info.h"
+#include "debug-uart.h"
+
+#define UNIPHIER_UART_TX		0x00
+#define UNIPHIER_UART_LCR_MCR		0x10
+#define UNIPHIER_UART_LSR		0x14
+#define UNIPHIER_UART_LDR		0x24
+
+static void _debug_uart_putc(int c)
+{
+	void __iomem *base = (void __iomem *)CONFIG_DEBUG_UART_BASE;
+
+	while (!(readl(base + UNIPHIER_UART_LSR) & UART_LSR_THRE))
+		;
+
+	writel(c, base + UNIPHIER_UART_TX);
+}
+
+void _debug_uart_init(void)
+{
+	void __iomem *base = (void __iomem *)CONFIG_DEBUG_UART_BASE;
+	unsigned int divisor;
+
+	switch (uniphier_get_soc_type()) {
+#if defined(CONFIG_ARCH_UNIPHIER_SLD3)
+	case SOC_UNIPHIER_SLD3:
+		divisor = uniphier_sld3_debug_uart_init();
+		break;
+#endif
+#if defined(CONFIG_ARCH_UNIPHIER_LD4)
+	case SOC_UNIPHIER_LD4:
+		divisor = uniphier_ld4_debug_uart_init();
+		break;
+#endif
+#if defined(CONFIG_ARCH_UNIPHIER_PRO4)
+	case SOC_UNIPHIER_PRO4:
+		divisor = uniphier_pro4_debug_uart_init();
+		break;
+#endif
+#if defined(CONFIG_ARCH_UNIPHIER_SLD8)
+	case SOC_UNIPHIER_SLD8:
+		divisor = uniphier_sld8_debug_uart_init();
+		break;
+#endif
+#if defined(CONFIG_ARCH_UNIPHIER_PRO5)
+	case SOC_UNIPHIER_PRO5:
+		divisor = uniphier_pro5_debug_uart_init();
+		break;
+#endif
+#if defined(CONFIG_ARCH_UNIPHIER_PXS2)
+	case SOC_UNIPHIER_PXS2:
+		divisor = uniphier_pxs2_debug_uart_init();
+		break;
+#endif
+#if defined(CONFIG_ARCH_UNIPHIER_LD6B)
+	case SOC_UNIPHIER_LD6B:
+		divisor = uniphier_ld6b_debug_uart_init();
+		break;
+#endif
+#if defined(CONFIG_ARCH_UNIPHIER_LD11) || defined(CONFIG_ARCH_UNIPHIER_LD20)
+	case SOC_UNIPHIER_LD11:
+	case SOC_UNIPHIER_LD20:
+		divisor = uniphier_ld20_debug_uart_init();
+		break;
+#endif
+	default:
+		return;
+	}
+
+	writel(UART_LCR_WLEN8 << 8, base + UNIPHIER_UART_LCR_MCR);
+
+	writel(divisor, base + UNIPHIER_UART_LDR);
+}
+DEBUG_UART_FUNCS