diff --git a/target/linux/ramips/dts/rt5350.dtsi b/target/linux/ramips/dts/rt5350.dtsi
index e88f28dee8..722540b037 100644
--- a/target/linux/ramips/dts/rt5350.dtsi
+++ b/target/linux/ramips/dts/rt5350.dtsi
@@ -230,6 +230,12 @@
 				ralink,function = "uartf";
 			};
 		};
+		spi_cs1: spi1 {
+			spi1 {
+				ralink,group = "spi_cs1";
+				ralink,function = "spi_cs1";
+			};
+		};
 	};
 
 	rstctrl: rstctrl {
diff --git a/target/linux/ramips/patches-3.10/0221-pinmux-rt5350-spi_cs1.patch b/target/linux/ramips/patches-3.10/0221-pinmux-rt5350-spi_cs1.patch
new file mode 100644
index 0000000000..bdcf7f0c1a
--- /dev/null
+++ b/target/linux/ramips/patches-3.10/0221-pinmux-rt5350-spi_cs1.patch
@@ -0,0 +1,31 @@
+--- a/arch/mips/include/asm/mach-ralink/rt305x.h
++++ b/arch/mips/include/asm/mach-ralink/rt305x.h
+@@ -145,6 +145,7 @@ static inline int soc_is_rt5350(void)
+ #define RT305X_GPIO_MODE_SDRAM		8
+ #define RT305X_GPIO_MODE_RGMII		9
+ #define RT5350_GPIO_MODE_PHY_LED	14
++#define RT5350_GPIO_MODE_SPI_CS1	21
+ #define RT3352_GPIO_MODE_LNA		18
+ #define RT3352_GPIO_MODE_PA		20
+ 
+--- a/arch/mips/ralink/rt305x.c
++++ b/arch/mips/ralink/rt305x.c
+@@ -38,6 +38,10 @@ static struct rt2880_pmx_func uartlite_f
+ static struct rt2880_pmx_func jtag_func[] = { FUNC("jtag", 0, 17, 5) };
+ static struct rt2880_pmx_func mdio_func[] = { FUNC("mdio", 0, 22, 2) };
+ static struct rt2880_pmx_func rt5350_led_func[] = { FUNC("led", 0, 22, 5) };
++static struct rt2880_pmx_func rt5350_cs1_func[] = {
++	FUNC("spi_cs1", 0, 27, 1),
++	FUNC("wdg_cs1", 1, 27, 1),
++};
+ static struct rt2880_pmx_func sdram_func[] = { FUNC("sdram", 0, 24, 16) };
+ static struct rt2880_pmx_func rt3352_rgmii_func[] = { FUNC("rgmii", 0, 24, 12) };
+ static struct rt2880_pmx_func rgmii_func[] = { FUNC("rgmii", 0, 40, 12) };
+@@ -81,6 +85,7 @@ static struct rt2880_pmx_group rt5350_pi
+ 	GRP("uartlite", uartlite_func, 1, RT305X_GPIO_MODE_UART1),
+ 	GRP("jtag", jtag_func, 1, RT305X_GPIO_MODE_JTAG),
+ 	GRP("led", rt5350_led_func, 1, RT5350_GPIO_MODE_PHY_LED),
++	GRP("spi_cs1", rt5350_cs1_func, 2, RT5350_GPIO_MODE_SPI_CS1),
+ 	{ 0 }
+ };
+