ARM: dts: keystone: Header file for pinctrl constants

The pinctrl IP used in some of the Keystone 2 devices differ vs other
TI SoCs. Therefore, create a Keystone specific pinctrl header.

Signed-off-by: Lokesh Vutla <[e-mail]>
Signed-off-by: Franklin S Cooper Jr <[e-mail]>
Signed-off-by: Tero Kristo <[e-mail]>
Signed-off-by: Dave Gerlach <[e-mail]>
Signed-off-by: Santosh Shilimkar <[e-mail]>

arch/arm/boot/dts/keystone-k2g.dtsi

···
  */
 
 #include <dt-bindings/interrupt-controller/arm-gic.h>
+#include <dt-bindings/pinctrl/keystone.h>
 #include "skeleton.dtsi"
 
 / {

include/dt-bindings/pinctrl/keystone.h

···
+/*
+ * This header provides constants for Keystone pinctrl bindings.
+ *
+ * Copyright (C) 2016 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef _DT_BINDINGS_PINCTRL_KEYSTONE_H
+#define _DT_BINDINGS_PINCTRL_KEYSTONE_H
+
+#define MUX_MODE0	0
+#define MUX_MODE1	1
+#define MUX_MODE2	2
+#define MUX_MODE3	3
+#define MUX_MODE4	4
+#define MUX_MODE5	5
+
+#define BUFFER_CLASS_B	(0 << 19)
+#define BUFFER_CLASS_C	(1 << 19)
+#define BUFFER_CLASS_D	(2 << 19)
+#define BUFFER_CLASS_E	(3 << 19)
+
+#define PULL_DISABLE	(1 << 16)
+#define PIN_PULLUP	(1 << 17)
+#define PIN_PULLDOWN	(0 << 17)
+
+#define KEYSTONE_IOPAD_OFFSET(pa, offset) (((pa) & 0xffff) - (offset))
+
+#define K2G_CORE_IOPAD(pa) KEYSTONE_IOPAD_OFFSET((pa), 0x1000)
+
+#endif