diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index ec57b095f1ee..b252195a9708 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -709,6 +709,7 @@ config ARCH_RK2818
 	select COMMON_CLKDEV
         select GENERIC_TIME
         select GENERIC_CLOCKEVENTS
+        select ARCH_REQUIRE_GPIOLIB
 	help
           Support for Rockchip RK2818 soc.
 
diff --git a/arch/arm/mach-rk2818/include/mach/irqs.h b/arch/arm/mach-rk2818/include/mach/irqs.h
index d6b94df7bcd1..096bd203f7e1 100644
--- a/arch/arm/mach-rk2818/include/mach/irqs.h
+++ b/arch/arm/mach-rk2818/include/mach/irqs.h
@@ -42,7 +42,11 @@
 #define IRQ_REG_PLEVEL               0xd8//IRQ System Priority Level Register
 
 
-#define NR_IRQS         (48)
+/*定义RK2818的最大中断数目。NR_AIC_IRQS表示RK2818的中断寄存器支持的最大中断数目，
+CONFIG_RK28_GPIO_IRQ表示RK2818的GPIO复用的最大中断数目，CONFIG_EXTEND_GPIO_IRQ表示RK2818的
+扩展IO复用的最大中断数目。*/
+#define NR_AIC_IRQS 	48
+#define	NR_IRQS		(NR_AIC_IRQS + CONFIG_RK28_GPIO_IRQ + CONFIG_EXTEND_GPIO_IRQ)                                   
                                    
                                    
 /*irq number*/                                   
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 2ad0128c63c6..04383183cf57 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -230,4 +230,19 @@ config GPIO_UCB1400
 	  To compile this driver as a module, choose M here: the
 	  module will be called ucb1400_gpio.
 
+config GPIO_TCA6424
+	bool "TCA6424 extend GPIO"
+	depends on I2C
+	help
+	  Say yes here to access the TCA6424 extend GPIO 
+
+config ARCH_EXTEND_GPIOS	  
+	int
+	default 24 if GPIO_TCA6424
+	default 0
+	
+config EXTEND_GPIO_IRQ
+	int
+	default 3 if GPIO_TCA6424	
+	default 0	
 endif