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Date: Tue, 5 Apr 2011 12:28:06 -0600
From: John Linn <john.linn@...inx.com>
To: <linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>, <linux@....linux.org.uk>,
<catalin.marinas@....com>, <glikely@...retlab.ca>,
<jamie@...ieiles.com>, <arnd@...db.de>, <nicolas.pitre@...aro.org>
CC: John Linn <john.linn@...inx.com>
Subject: [PATCH V6 5/5] ARM: Xilinx: adding device tree support
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@...inx.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@0 {
+ compatible = "simple-bus";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges;
+
+ intc: intc@...01000 {
+ interrupt-controller;
+ compatible = "arm,gic";
+ reg = <0xF8F01000 0x1000>;
+ #interrupt-cells = <2>;
+ };
+
+ uart0: uart@...00000 {
+ 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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