diff --git a/arch/arm/include/asm/arch-sunxi/cpu_sun9i.h b/arch/arm/include/asm/arch-sunxi/cpu_sun9i.h
index acbc94f..ba18a0f 100644
--- a/arch/arm/include/asm/arch-sunxi/cpu_sun9i.h
+++ b/arch/arm/include/asm/arch-sunxi/cpu_sun9i.h
@@ -23,6 +23,8 @@
 #define SUNXI_NFC_BASE			(REGS_AHB0_BASE + 0x3000)
 #define SUNXI_TSC_BASE			(REGS_AHB0_BASE + 0x4000)
 
+#define SUNXI_GTBUS_BASE		(REGS_AHB0_BASE + 0x9000)
+
 #define SUNXI_MMC0_BASE			(REGS_AHB0_BASE + 0x0f000)
 #define SUNXI_MMC1_BASE			(REGS_AHB0_BASE + 0x10000)
 #define SUNXI_MMC2_BASE			(REGS_AHB0_BASE + 0x11000)
diff --git a/arch/arm/include/asm/arch-sunxi/gtbus.h b/arch/arm/include/asm/arch-sunxi/gtbus.h
new file mode 100644
index 0000000..b8308d5
--- /dev/null
+++ b/arch/arm/include/asm/arch-sunxi/gtbus.h
@@ -0,0 +1,21 @@
+/*
+ * GTBUS initialisation
+ *
+ * (C) Copyright 2016 Theobroma Systems Design und Consulting GmbH
+ *                    Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef _SUNXI_GTBUS_H
+#define _SUNXI_GTBUS_H
+
+#if defined(CONFIG_MACH_SUN9I)
+#include <asm/arch/gtbus_sun9i.h>
+#endif
+
+#ifndef __ASSEMBLY__
+void gtbus_init(void);
+#endif
+
+#endif
diff --git a/arch/arm/include/asm/arch-sunxi/gtbus_sun9i.h b/arch/arm/include/asm/arch-sunxi/gtbus_sun9i.h
new file mode 100644
index 0000000..fd50826
--- /dev/null
+++ b/arch/arm/include/asm/arch-sunxi/gtbus_sun9i.h
@@ -0,0 +1,92 @@
+/*
+ * GTBUS initialisation for sun9i
+ *
+ * (C) Copyright 2016 Theobroma Systems Design und Consulting GmbH
+ *                    Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef _SUNXI_GTBUS_SUN9I_H
+#define _SUNXI_GTBUS_SUN9I_H
+
+#include <linux/types.h>
+
+struct sunxi_gtbus_reg {
+	u32 mst_cfg[36];           /* 0x000 */
+	u8  reserved1[0x70];       /* 0x090 */
+	u32 bw_wdw_cfg;            /* 0x100 */
+	u32 mst_read_prio_cfg[2];  /* 0x104 */
+	u32 lvl2_mst_cfg;          /* 0x10c */
+	u32 sw_clk_on;             /* 0x110 */
+	u32 sw_clk_off;            /* 0x114 */
+	u32 pmu_mst_en;            /* 0x118 */
+	u32 pmu_cfg;               /* 0x11c */
+	u32 pmu_cnt[19];           /* 0x120 */
+	u32 reserved2[0x94];       /* 0x16c */
+	u32 cci400_config[3];      /* 0x200 */
+	u32 cci400_status[2];      /* 0x20c */
+};
+
+/* for register GT_MST_CFG_REG(n) */
+#define GT_ENABLE_REQ           (1<<31) /* clock on */
+#define GT_DISABLE_REQ          (1<<30) /* clock off */
+#define GT_QOS_SHIFT            28
+#define GT_THD1_SHIFT           16
+#define GT_REQN_MAX             0xf /* max no master requests in one cycle */
+#define GT_REQN_SHIFT           12
+#define GT_THD0_SHIFT           0
+
+#define GT_QOS_MAX              0x3
+#define GT_THD_MAX              0xfff
+#define GT_BW_WDW_MAX           0xffff
+
+/* mst_read_prio_cfg */
+#define GT_PRIO_LOW     0
+#define GT_PRIO_HIGH    1
+
+/* GTBUS port ids */
+#define GT_PORT_CPUM1   0
+#define GT_PORT_CPUM2   1
+#define GT_PORT_SATA    2
+#define	GT_PORT_USB3    3
+#define	GT_PORT_FE0     4
+#define	GT_PORT_BE1     5
+#define	GT_PORT_BE2     6
+#define	GT_PORT_IEP0    7
+#define	GT_PORT_FE1     8
+#define	GT_PORT_BE0     9
+#define	GT_PORT_FE2     10
+#define	GT_PORT_IEP1    11
+#define	GT_PORT_VED     12
+#define	GT_PORT_VEE     13
+#define	GT_PORT_FD      14
+#define	GT_PORT_CSI     15
+#define	GT_PORT_MP      16
+#define	GT_PORT_HSI     17
+#define	GT_PORT_SS      18
+#define	GT_PORT_TS      19
+#define	GT_PORT_DMA     20
+#define	GT_PORT_NDFC0   21
+#define	GT_PORT_NDFC1   22
+#define	GT_PORT_CPUS    23
+#define	GT_PORT_TH      24
+#define	GT_PORT_GMAC    25
+#define	GT_PORT_USB0    26
+#define	GT_PORT_MSTG0   27
+#define	GT_PORT_MSTG1   28
+#define	GT_PORT_MSTG2   29
+#define	GT_PORT_MSTG3   30
+#define	GT_PORT_USB1    31
+#define	GT_PORT_GPU0    32
+#define	GT_PORT_GPU1    33
+#define	GT_PORT_USB2    34
+#define	GT_PORT_CPUM0   35
+
+#define GP_MST_CFG_DEFAULT \
+	((GT_QOS_MAX << GT_QOS_SHIFT)   | \
+	 (GT_THD_MAX << GT_THD1_SHIFT)  | \
+	 (GT_REQN_MAX << GT_REQN_SHIFT) | \
+	 (GT_THD_MAX << GT_THD0_SHIFT))
+
+#endif
diff --git a/arch/arm/mach-sunxi/Makefile b/arch/arm/mach-sunxi/Makefile
index 9d07d6b..e73114e 100644
--- a/arch/arm/mach-sunxi/Makefile
+++ b/arch/arm/mach-sunxi/Makefile
@@ -32,7 +32,7 @@
 else
 obj-$(CONFIG_MACH_SUN8I)	+= clock_sun6i.o
 endif
-obj-$(CONFIG_MACH_SUN9I)	+= clock_sun9i.o
+obj-$(CONFIG_MACH_SUN9I)	+= clock_sun9i.o gtbus_sun9i.o
 
 obj-$(CONFIG_AXP152_POWER)	+= pmic_bus.o
 obj-$(CONFIG_AXP209_POWER)	+= pmic_bus.o
diff --git a/arch/arm/mach-sunxi/clock.c b/arch/arm/mach-sunxi/clock.c
index 0b8fc94..e6f53f9 100644
--- a/arch/arm/mach-sunxi/clock.c
+++ b/arch/arm/mach-sunxi/clock.c
@@ -13,16 +13,22 @@
 #include <asm/arch/clock.h>
 #include <asm/arch/gpio.h>
 #include <asm/arch/prcm.h>
+#include <asm/arch/gtbus.h>
 #include <asm/arch/sys_proto.h>
 
 __weak void clock_init_sec(void)
 {
 }
 
+__weak void gtbus_init(void)
+{
+}
+
 int clock_init(void)
 {
 #ifdef CONFIG_SPL_BUILD
 	clock_init_safe();
+	gtbus_init();
 #endif
 	clock_init_uart();
 	clock_init_sec();
diff --git a/arch/arm/mach-sunxi/gtbus_sun9i.c b/arch/arm/mach-sunxi/gtbus_sun9i.c
new file mode 100644
index 0000000..c20d3c0
--- /dev/null
+++ b/arch/arm/mach-sunxi/gtbus_sun9i.c
@@ -0,0 +1,48 @@
+/*
+ * GTBUS initialisation for sun9i
+ *
+ * (C) Copyright 2016 Theobroma Systems Design und Consulting GmbH
+ *                    Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/gtbus_sun9i.h>
+#include <asm/arch/sys_proto.h>
+
+#ifdef CONFIG_SPL_BUILD
+
+void gtbus_init(void)
+{
+	struct sunxi_gtbus_reg * const gtbus =
+		(struct sunxi_gtbus_reg *)SUNXI_GTBUS_BASE;
+
+	/*
+	 * We use the same setting that Allwinner used in Boot0 for now.
+	 * It may be advantageous to adjust these for various workloads
+	 * (e.g. headless use cases that focus on IO throughput).
+	 */
+	writel((GT_PRIO_HIGH << GT_PORT_FE0) |
+	       (GT_PRIO_HIGH << GT_PORT_BE1) |
+	       (GT_PRIO_HIGH << GT_PORT_BE2) |
+	       (GT_PRIO_HIGH << GT_PORT_IEP0) |
+	       (GT_PRIO_HIGH << GT_PORT_FE1) |
+	       (GT_PRIO_HIGH << GT_PORT_BE0) |
+	       (GT_PRIO_HIGH << GT_PORT_FE2) |
+	       (GT_PRIO_HIGH << GT_PORT_IEP1),
+	       &gtbus->mst_read_prio_cfg[0]);
+
+	writel(GP_MST_CFG_DEFAULT, &gtbus->mst_cfg[GT_PORT_FE0]);
+	writel(GP_MST_CFG_DEFAULT, &gtbus->mst_cfg[GT_PORT_FE0]);
+	writel(GP_MST_CFG_DEFAULT, &gtbus->mst_cfg[GT_PORT_BE1]);
+	writel(GP_MST_CFG_DEFAULT, &gtbus->mst_cfg[GT_PORT_BE2]);
+	writel(GP_MST_CFG_DEFAULT, &gtbus->mst_cfg[GT_PORT_IEP0]);
+	writel(GP_MST_CFG_DEFAULT, &gtbus->mst_cfg[GT_PORT_FE1]);
+	writel(GP_MST_CFG_DEFAULT, &gtbus->mst_cfg[GT_PORT_BE0]);
+	writel(GP_MST_CFG_DEFAULT, &gtbus->mst_cfg[GT_PORT_FE2]);
+	writel(GP_MST_CFG_DEFAULT, &gtbus->mst_cfg[GT_PORT_IEP1]);
+}
+
+#endif