diff --git a/arch/arm/include/asm/arch-sunxi/cpu_sun4i.h b/arch/arm/include/asm/arch-sunxi/cpu_sun4i.h
index 63b161a..0cdefdc 100644
--- a/arch/arm/include/asm/arch-sunxi/cpu_sun4i.h
+++ b/arch/arm/include/asm/arch-sunxi/cpu_sun4i.h
@@ -134,6 +134,7 @@
 #define SUNXI_RTC_BASE			0x01f00000
 #define SUNXI_PRCM_BASE			0x01f01400
 #define SUN6I_CPUCFG_BASE		0x01f01c00
+#define SUNXI_R_TWI_BASE		0x01f02400
 #define SUNXI_R_UART_BASE		0x01f02800
 #define SUNXI_R_PIO_BASE		0x01f02c00
 #define SUN6I_P2WI_BASE			0x01f03400
diff --git a/arch/arm/include/asm/arch-sunxi/gpio.h b/arch/arm/include/asm/arch-sunxi/gpio.h
index a2a9a38..649f6cd 100644
--- a/arch/arm/include/asm/arch-sunxi/gpio.h
+++ b/arch/arm/include/asm/arch-sunxi/gpio.h
@@ -199,6 +199,8 @@
 #define SUN6I_GPL1_R_P2WI_SDA	3
 
 #define SUN8I_GPL_R_RSB		2
+#define SUN8I_H3_GPL_R_TWI	2
+#define SUN8I_A23_GPL_R_TWI	3
 #define SUN8I_GPL_R_UART	2
 
 #define SUN9I_GPN_R_RSB		3
diff --git a/arch/arm/include/asm/arch-sunxi/i2c.h b/arch/arm/include/asm/arch-sunxi/i2c.h
index 561cd2b..4dfd313 100644
--- a/arch/arm/include/asm/arch-sunxi/i2c.h
+++ b/arch/arm/include/asm/arch-sunxi/i2c.h
@@ -23,6 +23,9 @@
 #ifdef CONFIG_I2C4_ENABLE
 #define CONFIG_I2C_MVTWSI_BASE4	SUNXI_TWI4_BASE
 #endif
+#ifdef CONFIG_R_I2C_ENABLE
+#define CONFIG_I2C_MVTWSI_BASE5 SUNXI_R_TWI_BASE
+#endif
 
 /* This is abp0-clk on sun4i/5i/7i / abp1-clk on sun6i/sun8i which is 24MHz */
 #define CONFIG_SYS_TCLK		24000000
diff --git a/arch/arm/include/asm/arch-sunxi/prcm.h b/arch/arm/include/asm/arch-sunxi/prcm.h
index 82ed541..556c1af 100644
--- a/arch/arm/include/asm/arch-sunxi/prcm.h
+++ b/arch/arm/include/asm/arch-sunxi/prcm.h
@@ -236,5 +236,7 @@
 };
 
 void prcm_apb0_enable(u32 flags);
+void prcm_apb0_disable(u32 flags);
+
 #endif /* __ASSEMBLY__ */
 #endif /* _PRCM_H */