ARM: imx6q: add DT node for gpmi nand

Add the DT node for gpmi nand.
Add the pinmux support for gpmi nand.

The gpmi nand may conflicts with other modules, such as MMC.
So we do not enable the gpmi nand for mx6q-arm2 board, just add the
node for the board.
Acked-by: NDong Aisheng <dong.aisheng@linaro.org>
Signed-off-by: NHuang Shijie <shijie8@gmail.com>
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>

arch/arm/boot/dts/imx6q-arm2.dts

@@ -22,6 +22,12 @@
 	};
 
 	soc {
+		gpmi-nand@00112000 {
+			pinctrl-names = "default";
+			pinctrl-0 = <&pinctrl_gpmi_nand_1>;
+			status = "disabled"; /* gpmi nand conflicts with SD */
+		};
+
 		aips-bus@02100000 { /* AIPS2 */
 			ethernet@02188000 {
 				phy-mode = "rgmii";

arch/arm/boot/dts/imx6q.dtsi

@@ -92,6 +92,18 @@
 			reg = <0x00110000 0x2000>;
 		};
 
+		gpmi-nand@00112000 {
+		       compatible = "fsl,imx6q-gpmi-nand";
+		       #address-cells = <1>;
+		       #size-cells = <1>;
+		       reg = <0x00112000 0x2000>, <0x00114000 0x2000>;
+		       reg-names = "gpmi-nand", "bch";
+		       interrupts = <0 13 0x04>, <0 15 0x04>;
+		       interrupt-names = "gpmi-dma", "bch";
+		       fsl,gpmi-dma-channel = <0>;
+		       status = "disabled";
+		};
+
 		timer@00a00600 {
 			compatible = "arm,cortex-a9-twd-timer";
 			reg = <0x00a00600 0x20>;
@@ -500,6 +512,30 @@
 					};
 				};
 
+				gpmi-nand {
+					pinctrl_gpmi_nand_1: gpmi-nand-1 {
+						fsl,pins = <1328 0xb0b1		/* MX6Q_PAD_NANDF_CLE__RAWNAND_CLE */
+							    1336 0xb0b1		/* MX6Q_PAD_NANDF_ALE__RAWNAND_ALE */
+							    1344 0xb0b1		/* MX6Q_PAD_NANDF_WP_B__RAWNAND_RESETN */
+							    1352 0xb000		/* MX6Q_PAD_NANDF_RB0__RAWNAND_READY0 */
+							    1360 0xb0b1		/* MX6Q_PAD_NANDF_CS0__RAWNAND_CE0N */
+							    1365 0xb0b1		/* MX6Q_PAD_NANDF_CS1__RAWNAND_CE1N */
+							    1371 0xb0b1		/* MX6Q_PAD_NANDF_CS2__RAWNAND_CE2N */
+							    1378 0xb0b1		/* MX6Q_PAD_NANDF_CS3__RAWNAND_CE3N */
+							    1387 0xb0b1		/* MX6Q_PAD_SD4_CMD__RAWNAND_RDN */
+							    1393 0xb0b1		/* MX6Q_PAD_SD4_CLK__RAWNAND_WRN */
+							    1397 0xb0b1		/* MX6Q_PAD_NANDF_D0__RAWNAND_D0 */
+							    1405 0xb0b1		/* MX6Q_PAD_NANDF_D1__RAWNAND_D1 */
+							    1413 0xb0b1		/* MX6Q_PAD_NANDF_D2__RAWNAND_D2 */
+							    1421 0xb0b1		/* MX6Q_PAD_NANDF_D3__RAWNAND_D3 */
+							    1429 0xb0b1		/* MX6Q_PAD_NANDF_D4__RAWNAND_D4 */
+							    1437 0xb0b1		/* MX6Q_PAD_NANDF_D5__RAWNAND_D5 */
+							    1445 0xb0b1		/* MX6Q_PAD_NANDF_D6__RAWNAND_D6 */
+							    1453 0xb0b1		/* MX6Q_PAD_NANDF_D7__RAWNAND_D7 */
+							    1463 0x00b1>;	/* MX6Q_PAD_SD4_DAT0__RAWNAND_DQS */
+					};
+				};
+
 				i2c1 {
 					pinctrl_i2c1_1: i2c1grp-1 {
 						fsl,pins = <137 0x4001b8b1	/* MX6Q_PAD_EIM_D21__I2C1_SCL */