--- 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 }
 };
 
