--- zzzz-none-000/linux-3.18.24/arch/arm/mach-imx/iomux-imx31.c	2015-10-31 20:39:51.000000000 +0000
+++ rtl96-5690pro-762/linux-3.18.24/arch/arm/mach-imx/iomux-imx31.c	2024-08-14 08:36:35.000000000 +0000
@@ -44,9 +44,11 @@
 /*
  * set the mode for a IOMUX pin.
  */
-int mxc_iomux_mode(unsigned int pin_mode)
+void mxc_iomux_mode(unsigned int pin_mode)
 {
-	u32 field, l, mode, ret = 0;
+	u32 field;
+	u32 l;
+	u32 mode;
 	void __iomem *reg;
 
 	reg = IOMUXSW_MUX_CTL + (pin_mode & IOMUX_REG_MASK);
@@ -61,8 +63,6 @@
 	__raw_writel(l, reg);
 
 	spin_unlock(&gpio_mux_lock);
-
-	return ret;
 }
 
 /*