--- a/arch/mips/ath79/common.c
+++ b/arch/mips/ath79/common.c
@@ -38,7 +38,7 @@ unsigned int ath79_soc_rev;
 void __iomem *ath79_pll_base;
 void __iomem *ath79_reset_base;
 EXPORT_SYMBOL_GPL(ath79_reset_base);
-static void __iomem *ath79_ddr_base;
+void __iomem *ath79_ddr_base;
 static void __iomem *ath79_ddr_wb_flush_base;
 static void __iomem *ath79_ddr_pci_win_base;
 
--- a/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
+++ b/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
@@ -32,7 +32,7 @@
 #define AR71XX_SPI_SIZE		0x01000000
 
 #define AR71XX_DDR_CTRL_BASE	(AR71XX_APB_BASE + 0x00000000)
-#define AR71XX_DDR_CTRL_SIZE	0x100
+#define AR71XX_DDR_CTRL_SIZE	0x200
 #define AR71XX_UART_BASE	(AR71XX_APB_BASE + 0x00020000)
 #define AR71XX_UART_SIZE	0x100
 #define AR71XX_USB_CTRL_BASE	(AR71XX_APB_BASE + 0x00030000)
@@ -222,6 +222,9 @@
 #define QCA953X_DDR_REG_FLUSH_PCIE	0xa8
 #define QCA953X_DDR_REG_FLUSH_WMAC	0xac
 
+#define QCA955X_DDR_CTL_CONFIG		0x108
+#define QCA955X_DDR_CTL_CONFIG_ACT_WMAC	BIT(23)
+
 /*
  * PLL block
  */
--- a/arch/mips/ath79/dev-wmac.c
+++ b/arch/mips/ath79/dev-wmac.c
@@ -171,6 +171,27 @@ static void qca953x_wmac_setup(void)
 	ath79_wmac_data.get_mac_revision = ar93xx_get_soc_revision;
 }
 
+static int ar955x_wmac_reset(void)
+{
+	int i;
+
+	/* Try to wait for WMAC DDR activity to stop */
+	for (i = 0; i < 10; i++) {
+		if (!(__raw_readl(ath79_ddr_base + QCA955X_DDR_CTL_CONFIG) &
+		      QCA955X_DDR_CTL_CONFIG_ACT_WMAC))
+			break;
+
+		udelay(10);
+	}
+
+	ath79_device_reset_set(QCA955X_RESET_RTC);
+	udelay(10);
+	ath79_device_reset_clear(QCA955X_RESET_RTC);
+	udelay(10);
+
+	return 0;
+}
+
 static void qca955x_wmac_setup(void)
 {
 	u32 t;
@@ -187,6 +208,8 @@ static void qca955x_wmac_setup(void)
 		ath79_wmac_data.is_clk_25mhz = false;
 	else
 		ath79_wmac_data.is_clk_25mhz = true;
+
+	ath79_wmac_data.external_reset = ar955x_wmac_reset;
 }
 
 static void qca956x_wmac_setup(void)
--- a/arch/mips/ath79/common.h
+++ b/arch/mips/ath79/common.h
@@ -19,6 +19,8 @@
 #define ATH79_MEM_SIZE_MIN	(2 * 1024 * 1024)
 #define ATH79_MEM_SIZE_MAX	(256 * 1024 * 1024)
 
+extern void __iomem *ath79_ddr_base;
+
 void ath79_clocks_init(void);
 unsigned long ath79_get_sys_clk_rate(const char *id);
 
