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Subject[PATCH 3/3] ARM: mx5: add basic device tree support for imx51 babbage
Date
This patch adds the i.mx51 dt platform with uart and fec support.
It also adds the dts file imx51 babbage, so that we can have a dt
kernel on babbage booting into console with nfs root.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
---
arch/arm/boot/dts/imx51-babbage.dts | 89 +++++++++++++++++++++++++++++++++++
arch/arm/mach-mx5/Kconfig | 8 +++
arch/arm/mach-mx5/Makefile | 1 +
arch/arm/mach-mx5/imx51-dt.c | 70 +++++++++++++++++++++++++++
4 files changed, 168 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/boot/dts/imx51-babbage.dts
create mode 100644 arch/arm/mach-mx5/imx51-dt.c
diff --git a/arch/arm/boot/dts/imx51-babbage.dts b/arch/arm/boot/dts/imx51-babbage.dts
new file mode 100644
index 0000000..7976932
--- /dev/null
+++ b/arch/arm/boot/dts/imx51-babbage.dts
@@ -0,0 +1,89 @@
+/*
+ * Copyright 2011 Freescale Semiconductor, Inc.
+ * Copyright 2011 Linaro Ltd.
+ *
+ * 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/ "skeleton.dtsi"
+
+/ {
+ model = "Freescale i.MX51 Babbage";
+ compatible = "fsl,imx51-babbage", "fsl,imx51";
+ interrupt-parent = <&tzic>;
+
+ chosen {
+ bootargs = "console=ttymxc0,115200 root=/dev/mmcblk0p3 rootwait";
+ };
+
+ memory {
+ reg = <0x90000000 0x20000000>;
+ };
+
+ tzic: tz-interrupt-controller@e0000000 {
+ compatible = "fsl,imx51-tzic", "fsl,tzic";
+ interrupt-controller;
+ #interrupt-cells = <1>;
+ reg = <0xe0000000 0x4000>;
+ };
+
+ aips@70000000 { /* aips-1 */
+ compatible = "fsl,aips-bus", "simple-bus";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ reg = <0x70000000 0x10000000>;
+ ranges;
+
+ spba {
+ compatible = "fsl,spba-bus", "simple-bus";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ reg = <0x70000000 0x40000>;
+ ranges;
+
+ uart@7000c000 {
+ compatible = "fsl,imx51-uart", "fsl,imx-uart";
+ reg = <0x7000c000 0x4000>;
+ interrupts = <33>;
+ id = <3>;
+ fsl,has-rts-cts;
+ };
+ };
+
+ uart@73fbc000 {
+ compatible = "fsl,imx51-uart", "fsl,imx-uart";
+ reg = <0x73fbc000 0x4000>;
+ interrupts = <31>;
+ id = <1>;
+ fsl,has-rts-cts;
+ };
+
+ uart@73fc0000 {
+ compatible = "fsl,imx51-uart", "fsl,imx-uart";
+ reg = <0x73fc0000 0x4000>;
+ interrupts = <32>;
+ id = <2>;
+ fsl,has-rts-cts;
+ };
+ };
+
+ aips@80000000 { /* aips-2 */
+ compatible = "fsl,aips-bus", "simple-bus";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ reg = <0x80000000 0x10000000>;
+ ranges;
+
+ fec@83fec000 {
+ compatible = "fsl,imx51-fec", "fsl,fec";
+ reg = <0x83fec000 0x4000>;
+ interrupts = <87>;
+ };
+ };
+};
diff --git a/arch/arm/mach-mx5/Kconfig b/arch/arm/mach-mx5/Kconfig
index 799fbc4..8bdd0c4 100644
--- a/arch/arm/mach-mx5/Kconfig
+++ b/arch/arm/mach-mx5/Kconfig
@@ -62,6 +62,14 @@ endif # ARCH_MX50_SUPPORTED
if ARCH_MX51
comment "i.MX51 machines:"

+config MACH_IMX51_DT
+ bool "Support i.MX51 platforms from device tree"
+ select SOC_IMX51
+ select USE_OF
+ help
+ Include support for Freescale i.MX51 based platforms
+ using the device tree for discovery
+
config MACH_MX51_BABBAGE
bool "Support MX51 BABBAGE platforms"
select SOC_IMX51
diff --git a/arch/arm/mach-mx5/Makefile b/arch/arm/mach-mx5/Makefile
index 0b9338c..47b483f 100644
--- a/arch/arm/mach-mx5/Makefile
+++ b/arch/arm/mach-mx5/Makefile
@@ -7,6 +7,7 @@ obj-y := cpu.o mm.o clock-mx51-mx53.o devices.o ehci.o system.o
obj-$(CONFIG_SOC_IMX50) += mm-mx50.o

obj-$(CONFIG_CPU_FREQ_IMX) += cpu_op-mx51.o
+obj-$(CONFIG_MACH_IMX51_DT) += imx51-dt.o
obj-$(CONFIG_MACH_MX51_BABBAGE) += board-mx51_babbage.o
obj-$(CONFIG_MACH_MX51_3DS) += board-mx51_3ds.o
obj-$(CONFIG_MACH_MX53_EVK) += board-mx53_evk.o
diff --git a/arch/arm/mach-mx5/imx51-dt.c b/arch/arm/mach-mx5/imx51-dt.c
new file mode 100644
index 0000000..8bfdb91
--- /dev/null
+++ b/arch/arm/mach-mx5/imx51-dt.c
@@ -0,0 +1,70 @@
+/*
+ * Copyright 2011 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright 2011 Linaro Ltd.
+ *
+ * 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 <linux/irq.h>
+#include <linux/of_platform.h>
+
+#include <asm/mach/arch.h>
+#include <asm/mach/time.h>
+
+#include <mach/common.h>
+#include <mach/mx51.h>
+
+/*
+ * Lookup table for attaching a specific name and platform_data pointer to
+ * devices as they get created by of_platform_populate(). Ideally this table
+ * would not exist, but the current clock implementation depends on some devices
+ * having a specific name.
+ */
+static const struct of_dev_auxdata imx51_auxdata_lookup[] __initconst = {
+ OF_DEV_AUXDATA("fsl,imx51-uart", MX51_UART1_BASE_ADDR, "imx-uart.0", NULL),
+ OF_DEV_AUXDATA("fsl,imx51-uart", MX51_UART2_BASE_ADDR, "imx-uart.1", NULL),
+ OF_DEV_AUXDATA("fsl,imx51-uart", MX51_UART3_BASE_ADDR, "imx-uart.2", NULL),
+ OF_DEV_AUXDATA("fsl,imx51-fec", MX51_FEC_BASE_ADDR, "fec.0", NULL),
+ {}
+};
+
+static const struct of_device_id tzic_of_match[] __initconst = {
+ { .compatible = "fsl,imx51-tzic", },
+ {}
+};
+
+static void __init imx51_dt_init(void)
+{
+ irq_domain_generate_simple(tzic_of_match, MX51_TZIC_BASE_ADDR, 0);
+
+ of_platform_populate(NULL, of_default_bus_match_table,
+ imx51_auxdata_lookup, NULL);
+}
+
+static void __init imx51_timer_init(void)
+{
+ mx51_clocks_init(32768, 24000000, 22579200, 0);
+}
+
+static struct sys_timer imx51_timer = {
+ .init = imx51_timer_init,
+};
+
+static const char *imx51_dt_board_compat[] __initdata = {
+ "fsl,imx51-babbage",
+ NULL
+};
+
+DT_MACHINE_START(IMX51_DT, "Freescale i.MX51 (Device Tree Support)")
+ .map_io = mx51_map_io,
+ .init_early = imx51_init_early,
+ .init_irq = mx51_init_irq,
+ .timer = &imx51_timer,
+ .init_machine = imx51_dt_init,
+ .dt_compat = imx51_dt_board_compat,
+MACHINE_END
--
1.7.4.1


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