Forgot return

controller/am335x/am335x.c

@@ -157,6 +157,8 @@ int am335x_control_module_set(size_t offset, uint32_t bits)
 
 	reg = am335x_read32(control_module_base, offset);
 	am335x_write32(control_module_base, offset, reg | bits);
+	
+	return 0;
 }
 
 int am335x_pinmux_debug(size_t offset)