[PATCH V6 5/5] ARM: Xilinx: adding device tree support

[John Linn]

This commit is dependent on the device tree for ARM
work that Grant Likely has been doing. Minimal changes
are needed to support device tree.

Signed-off-by: John Linn <john.linn at xilinx.com>
---

This is new patch in the series starting at V6. It is an optional 
patch for those not using device tree yet.

 Documentation/devicetree/bindings/arm/xilinx.txt |    7 +++
 arch/arm/boot/dts/zynq-ep107.dts                 |   52 ++++++++++++++++++++++
 arch/arm/mach-zynq/board_ep107.c                 |    8 +++-
 arch/arm/mach-zynq/common.c                      |   12 +++++
 4 files changed, 78 insertions(+), 1 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/arm/xilinx.txt
 create mode 100755 arch/arm/boot/dts/zynq-ep107.dts

diff --git a/Documentation/devicetree/bindings/arm/xilinx.txt b/Documentation/devicetree/bindings/arm/xilinx.txt
new file mode 100644
index 0000000..6f1ed83
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/xilinx.txt
@@ -0,0 +1,7 @@
+Xilinx Zynq EP107 Emulation Platform board
+
+This board is an emulation platform for the Zynq product which is
+based on an ARM Cortex A9 processor.
+
+Required root node properties:
+    - compatible = "xlnx,zynq-ep107";
diff --git a/arch/arm/boot/dts/zynq-ep107.dts b/arch/arm/boot/dts/zynq-ep107.dts
new file mode 100755
index 0000000..fe2c0cc
--- /dev/null
+++ b/arch/arm/boot/dts/zynq-ep107.dts
@@ -0,0 +1,52 @@
+/*
+ *  Copyright (C) 2011 Xilinx
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+/dts-v1/;
+/ {
+	model = "Xilinx Zynq EP107";
+	compatible = "xlnx,zynq-ep107";
+	#address-cells = <1>;
+	#size-cells = <1>;
+	interrupt-parent = <&intc>;
+
+	memory {
+		device_type = "memory";
+		reg = <0x0 0x10000000>;
+	};
+
+	chosen {
+		bootargs = "console=ttyDF0,9600 root=/dev/ram rw initrd=0x800000,8M earlyprintk";
+		linux,stdout-path = &uart0;
+	};
+
+	amba: amba at 0 {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+
+		intc: intc at F8F01000 {
+			interrupt-controller;
+			compatible = "arm,gic";
+			reg = <0xF8F01000 0x1000>;
+			#interrupt-cells = <2>;
+		};
+
+		uart0: uart at E0000000 {
+			compatible = "xlnx,xuartpss";
+			reg = <0xE0000000 0x1000>;
+			interrupts = <59 0>;
+			clock = <50000000>;
+		};
+	};
+};
diff --git a/arch/arm/mach-zynq/board_ep107.c b/arch/arm/mach-zynq/board_ep107.c
index 3d576d0..5284dcc 100644
--- a/arch/arm/mach-zynq/board_ep107.c
+++ b/arch/arm/mach-zynq/board_ep107.c
@@ -76,10 +76,16 @@ static void __init board_ep107_init(void)
 	platform_add_devices(&xilinx_pdevices[0], ARRAY_SIZE(xilinx_pdevices));
 }
 
-MACHINE_START(XILINX_EP107, "Xilinx EP107")
+static const char *xilinx_ep107_board_compat[] = {
+	"xlnx,zynq-ep107",
+	NULL
+};
+
+MACHINE_START(XILINX_EP107, "Xilinx Zynq EP107")
 	.boot_params    = PLAT_PHYS_OFFSET + 0x00000100,
 	.map_io         = xilinx_map_io,
 	.init_irq       = xilinx_irq_init,
 	.init_machine   = board_ep107_init,
 	.timer          = &xttcpss_sys_timer,
+	.dt_compat	= xilinx_ep107_board_compat,
 MACHINE_END
diff --git a/arch/arm/mach-zynq/common.c b/arch/arm/mach-zynq/common.c
index 9a626ba..4dd909b 100644
--- a/arch/arm/mach-zynq/common.c
+++ b/arch/arm/mach-zynq/common.c
@@ -20,6 +20,7 @@
 #include <linux/cpumask.h>
 #include <linux/platform_device.h>
 #include <linux/clk.h>
+#include <linux/of_platform.h>
 
 #include <asm/mach/map.h>
 #include <asm/page.h>
@@ -30,6 +31,13 @@
 #include <mach/clkdev.h>
 #include "common.h"
 
+#ifdef CONFIG_OF
+static struct of_device_id zynq_of_bus_ids[] __initdata = {
+	{ .compatible = "simple-bus", },
+	{}
+};
+#endif
+
 /*
  * Clock function infrastructure.
  */
@@ -60,6 +68,10 @@ void __init xilinx_system_init(void)
 	 */
 	l2x0_init(PL310_L2CC_BASE, 0x02060000, 0xF0F0FFFF);
 #endif
+
+#ifdef CONFIG_OF
+	of_platform_bus_probe(NULL, zynq_of_bus_ids, NULL);
+#endif
 }
 
 /**
-- 
1.5.4.7



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