ARM: mxs: add initial device tree support for imx23-evk board

It adds initial device tree support for imx23-evk board, and only
serial console is enabled.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Marek Vasut <marex@denx.de>

Documentation/devicetree/bindings/arm/fsl.txt

 Freescale i.MX Platforms Device Tree Bindings
 -----------------------------------------------
 
+i.MX23 Evaluation Kit
+Required root node properties:
+    - compatible = "fsl,imx23-evk", "fsl,imx23";
+
 i.MX28 Evaluation Kit
 Required root node properties:
     - compatible = "fsl,imx28-evk", "fsl,imx28";

arch/arm/boot/dts/imx23-evk.dts

+/*
+ * Copyright 2012 Freescale Semiconductor, Inc.
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+/dts-v1/;
+/include/ "imx23.dtsi"
+
+/ {
+	model = "Freescale i.MX23 Evaluation Kit";
+	compatible = "fsl,imx23-evk", "fsl,imx23";
+
+	memory {
+		reg = <0x40000000 0x08000000>;
+	};
+
+	apb@80000000 {
+		apbx@80040000 {
+			duart: serial@80070000 {
+				pinctrl-names = "default";
+				pinctrl-0 = <&duart_pins_a>;
+				status = "okay";
+			};
+		};
+	};
+};

arch/arm/boot/dts/imx23.dtsi

+/*
+ * Copyright 2012 Freescale Semiconductor, Inc.
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+/include/ "skeleton.dtsi"
+
+/ {
+	interrupt-parent = <&icoll>;
+
+	cpus {
+		cpu@0 {
+			compatible = "arm,arm926ejs";
+		};
+	};
+
+	apb@80000000 {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		reg = <0x80000000 0x80000>;
+		ranges;
+
+		apbh@80000000 {
+			compatible = "simple-bus";
+			#address-cells = <1>;
+			#size-cells = <1>;
+			reg = <0x80000000 0x40000>;
+			ranges;
+
+			icoll: interrupt-controller@80000000 {
+				compatible = "fsl,imx23-icoll", "fsl,mxs-icoll";
+				interrupt-controller;
+				#interrupt-cells = <1>;
+				reg = <0x80000000 0x2000>;
+			};
+
+			dma-apbh@80004000 {
+				reg = <0x80004000 2000>;
+				status = "disabled";
+			};
+
+			ecc@80008000 {
+				reg = <0x80008000 2000>;
+				status = "disabled";
+			};
+
+			bch@8000a000 {
+				reg = <0x8000a000 2000>;
+				status = "disabled";
+			};
+
+			gpmi@8000c000 {
+				reg = <0x8000c000 2000>;
+				status = "disabled";
+			};
+
+			ssp0: ssp@80010000 {
+				reg = <0x80010000 2000>;
+				status = "disabled";
+			};
+
+			etm@80014000 {
+				reg = <0x80014000 2000>;
+				status = "disabled";
+			};
+
+			pinctrl@80018000 {
+				#address-cells = <1>;
+				#size-cells = <0>;
+				compatible = "fsl,imx23-pinctrl";
+				reg = <0x80018000 2000>;
+
+				duart_pins_a: duart@0 {
+					reg = <0>;
+					fsl,pinmux-ids = <0x11a2 0x11b2>;
+					fsl,drive-strength = <0>;
+					fsl,voltage = <1>;
+					fsl,pull-up = <0>;
+				};
+			};
+
+			digctl@8001c000 {
+				reg = <0x8001c000 2000>;
+				status = "disabled";
+			};
+
+			emi@80020000 {
+				reg = <0x80020000 2000>;
+				status = "disabled";
+			};
+
+			dma-apbx@80024000 {
+				reg = <0x80024000 2000>;
+				status = "disabled";
+			};
+
+			dcp@80028000 {
+				reg = <0x80028000 2000>;
+				status = "disabled";
+			};
+
+			pxp@8002a000 {
+				reg = <0x8002a000 2000>;
+				status = "disabled";
+			};
+
+			ocotp@8002c000 {
+				reg = <0x8002c000 2000>;
+				status = "disabled";
+			};
+
+			axi-ahb@8002e000 {
+				reg = <0x8002e000 2000>;
+				status = "disabled";
+			};
+
+			lcdif@80030000 {
+				reg = <0x80030000 2000>;
+				status = "disabled";
+			};
+
+			ssp1: ssp@80034000 {
+				reg = <0x80034000 2000>;
+				status = "disabled";
+			};
+
+			tvenc@80038000 {
+				reg = <0x80038000 2000>;
+				status = "disabled";
+			};
+                };
+
+		apbx@80040000 {
+			compatible = "simple-bus";
+			#address-cells = <1>;
+			#size-cells = <1>;
+			reg = <0x80040000 0x40000>;
+			ranges;
+
+			clkctl@80040000 {
+				reg = <0x80040000 2000>;
+				status = "disabled";
+			};
+
+			saif0: saif@80042000 {
+				reg = <0x80042000 2000>;
+				status = "disabled";
+			};
+
+			power@80044000 {
+				reg = <0x80044000 2000>;
+				status = "disabled";
+			};
+
+			saif1: saif@80046000 {
+				reg = <0x80046000 2000>;
+				status = "disabled";
+			};
+
+			audio-out@80048000 {
+				reg = <0x80048000 2000>;
+				status = "disabled";
+			};
+
+			audio-in@8004c000 {
+				reg = <0x8004c000 2000>;
+				status = "disabled";
+			};
+
+			lradc@80050000 {
+				reg = <0x80050000 2000>;
+				status = "disabled";
+			};
+
+			spdif@80054000 {
+				reg = <0x80054000 2000>;
+				status = "disabled";
+			};
+
+			i2c@80058000 {
+				reg = <0x80058000 2000>;
+				status = "disabled";
+			};
+
+			rtc@8005c000 {
+				reg = <0x8005c000 2000>;
+				status = "disabled";
+			};
+
+			pwm@80064000 {
+				reg = <0x80064000 2000>;
+				status = "disabled";
+			};
+
+			timrot@80068000 {
+				reg = <0x80068000 2000>;
+				status = "disabled";
+			};
+
+			auart0: serial@8006c000 {
+				reg = <0x8006c000 0x2000>;
+				status = "disabled";
+			};
+
+			auart1: serial@8006e000 {
+				reg = <0x8006e000 0x2000>;
+				status = "disabled";
+			};
+
+			duart: serial@80070000 {
+				compatible = "arm,pl011", "arm,primecell";
+				reg = <0x80070000 0x2000>;
+				interrupts = <0>;
+				status = "disabled";
+			};
+
+			usbphy@8007c000 {
+				reg = <0x8007c000 0x2000>;
+				status = "disabled";
+			};
+		};
+	};
+
+	ahb@80080000 {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		reg = <0x80080000 0x80000>;
+		ranges;
+
+		usbctrl@80080000 {
+			reg = <0x80080000 0x10000>;
+			status = "disabled";
+		};
+	};
+};

arch/arm/mach-mxs/Kconfig

@@ -23,6 +23,7 @@ comment "MXS platforms:"
 
 config MACH_MXS_DT
 	bool "Support MXS platforms from device tree"
+	select SOC_IMX23
 	select SOC_IMX28
 	select USE_OF
 	help

arch/arm/mach-mxs/mach-mxs.c

@@ -41,6 +41,15 @@ static void __init mxs_dt_init_irq(void)
 	of_irq_init(mxs_irq_match);
 }
 
+static void __init imx23_timer_init(void)
+{
+	mx23_clocks_init();
+}
+
+static struct sys_timer imx23_timer = {
+	.init = imx23_timer_init,
+};
+
 static void __init imx28_timer_init(void)
 {
 	mx28_clocks_init();
@@ -69,12 +78,27 @@ static void __init mxs_machine_init(void)
 				NULL, NULL);
 }
 
+static const char *imx23_dt_compat[] __initdata = {
+	"fsl,imx23-evk",
+	"fsl,imx23",
+	NULL,
+};
+
 static const char *imx28_dt_compat[] __initdata = {
 	"fsl,imx28-evk",
 	"fsl,imx28",
 	NULL,
 };
 
+DT_MACHINE_START(IMX23, "Freescale i.MX23 (Device Tree)")
+	.map_io		= mx23_map_io,
+	.init_irq	= mxs_dt_init_irq,
+	.timer		= &imx23_timer,
+	.init_machine	= mxs_machine_init,
+	.dt_compat	= imx23_dt_compat,
+	.restart	= mxs_restart,
+MACHINE_END
+
 DT_MACHINE_START(IMX28, "Freescale i.MX28 (Device Tree)")
 	.map_io		= mx28_map_io,
 	.init_irq	= mxs_dt_init_irq,

drivers/clk/mxs/clk-imx23.c

@@ -87,6 +87,7 @@ static struct clk_lookup hbus_lookups[] __initdata = {
 
 static struct clk_lookup xbus_lookups[] __initdata = {
 	{ .dev_id = "duart", .con_id = "apb_pclk"},
+	{ .dev_id = "80070000.serial", .con_id = "apb_pclk"},
 	{ .dev_id = "mxs-dma-apbx", },
 	{ .dev_id = "80024000.dma-apbx", },
 };