diff --git a/drivers/pinmux/Kconfig b/drivers/pinmux/Kconfig
index 7ee58bf3643..f4a904042bc 100644
--- a/drivers/pinmux/Kconfig
+++ b/drivers/pinmux/Kconfig
@@ -37,12 +37,17 @@ config PINMUX_NAME
 config PINMUX_INIT_PRIORITY
 	int
 	prompt "Init priority"
-	default 60
+	default 45
 	depends on PINMUX
 	help
-	  Device driver initialization priority.
-	  The device needs to be initialized after all the devices it
-	  uses.
+	  Pinmux driver initialization priority.
+	  Pinmux driver almost certainly should be initialized before the
+	  rest of hardware devices (which may need specific pins already
+	  configured for them), and usually after generic GPIO drivers.
+	  Thus, its priority should be between KERNEL_INIT_PRIORITY_DEFAULT
+	  and KERNEL_INIT_PRIORITY_DEVICE. There are exceptions to this
+	  rule for particular boards. Don't change this value unless you
+	  know what you are doing.
 
 config PINMUX_K64
 	bool "Freescale K64-based Pin multiplexer driver"
diff --git a/drivers/pinmux/dev/pinmux_dev_k64.c b/drivers/pinmux/dev/pinmux_dev_k64.c
index ae64da34f58..1b1773075ce 100644
--- a/drivers/pinmux/dev/pinmux_dev_k64.c
+++ b/drivers/pinmux/dev/pinmux_dev_k64.c
@@ -53,5 +53,5 @@ int pinmux_fsl_k64_initialize(struct device *port)
 /* must be initialized after GPIO */
 DEVICE_AND_API_INIT(pmux, CONFIG_PINMUX_DEV_NAME, &pinmux_fsl_k64_initialize,
 		    NULL, NULL,
-		    POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEVICE,
+		    POST_KERNEL, CONFIG_PINMUX_INIT_PRIORITY,
 		    &api_funcs);
diff --git a/drivers/pinmux/k64/pinmux_board_frdm_k64f.c b/drivers/pinmux/k64/pinmux_board_frdm_k64f.c
index e8d33a36cae..9b61b6859ca 100644
--- a/drivers/pinmux/k64/pinmux_board_frdm_k64f.c
+++ b/drivers/pinmux/k64/pinmux_board_frdm_k64f.c
@@ -114,4 +114,4 @@ static int fsl_frdm_k64f_pin_init(struct device *arg)
 	return 0;
 }
 
-SYS_INIT(fsl_frdm_k64f_pin_init, POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEVICE);
+SYS_INIT(fsl_frdm_k64f_pin_init, POST_KERNEL, CONFIG_PINMUX_INIT_PRIORITY);
diff --git a/drivers/pinmux/k64/pinmux_board_hexiwear.c b/drivers/pinmux/k64/pinmux_board_hexiwear.c
index 2f37e603bf3..6de6ad681a5 100644
--- a/drivers/pinmux/k64/pinmux_board_hexiwear.c
+++ b/drivers/pinmux/k64/pinmux_board_hexiwear.c
@@ -66,4 +66,4 @@ static int hexiwear_pin_init(struct device *arg)
 	return 0;
 }
 
-SYS_INIT(hexiwear_pin_init, POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEVICE);
+SYS_INIT(hexiwear_pin_init, POST_KERNEL, CONFIG_PINMUX_INIT_PRIORITY);