1 files changed, 7 insertions, 2 deletions

diff --git a/arch/arm/plat-mxc/audmux-v1.c b/arch/arm/plat-mxc/audmux-v1.c
index 70ab5aff2b9e..da6387dcdf21 100644
--- a/arch/arm/plat-mxc/audmux-v1.c
+++ b/arch/arm/plat-mxc/audmux-v1.c
@@ -28,7 +28,9 @@
 
 static void __iomem *audmux_base;
 
-#define MXC_AUDMUX_V1_PCR(x)    ((x) * 4)
+static unsigned char port_mapping[] = {
+        0x0, 0x4, 0x8, 0x10, 0x14, 0x1c,
+};
 
 int mxc_audmux_v1_configure_port(unsigned int port, unsigned int pcr)
 {
@@ -37,7 +39,10 @@ int mxc_audmux_v1_configure_port(unsigned int port, unsigned int pcr)
                 return -ENOSYS;
         }
 
-        writel(pcr, audmux_base + MXC_AUDMUX_V1_PCR(port));
+        if (port >= ARRAY_SIZE(port_mapping))
+                return -EINVAL;
+
+        writel(pcr, audmux_base + port_mapping[port]);
 
         return 0;
 }