ARM: mxs: add initial device tree support for imx28-evk board
This patch includes basic dt support which can boot via nfs rootfs.
Signed-off-by: Dong Aisheng <dong.aisheng@linaro.org>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Marek Vasut <marex@denx.de>
diff --git a/arch/arm/mach-mxs/mach-mxs.c b/arch/arm/mach-mxs/mach-mxs.c
new file mode 100644
index 0000000..5d81a23
--- /dev/null
+++ b/arch/arm/mach-mxs/mach-mxs.c
@@ -0,0 +1,85 @@
+/*
+ * Copyright 2012 Freescale Semiconductor, Inc.
+ * Copyright 2012 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/clk.h>
+#include <linux/clkdev.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/init.h>
+#include <linux/irqdomain.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/time.h>
+#include <mach/common.h>
+
+static int __init mxs_icoll_add_irq_domain(struct device_node *np,
+ struct device_node *interrupt_parent)
+{
+ irq_domain_add_legacy(np, 128, 0, 0, &irq_domain_simple_ops, NULL);
+
+ return 0;
+}
+
+static const struct of_device_id mxs_irq_match[] __initconst = {
+ { .compatible = "fsl,mxs-icoll", .data = mxs_icoll_add_irq_domain, },
+ { /* sentinel */ }
+};
+
+static void __init mxs_dt_init_irq(void)
+{
+ icoll_init_irq();
+ of_irq_init(mxs_irq_match);
+}
+
+static void __init imx28_timer_init(void)
+{
+ mx28_clocks_init();
+}
+
+static struct sys_timer imx28_timer = {
+ .init = imx28_timer_init,
+};
+
+static void __init imx28_evk_init(void)
+{
+ struct clk *clk;
+
+ /* Enable fec phy clock */
+ clk = clk_get_sys("enet_out", NULL);
+ if (!IS_ERR(clk))
+ clk_prepare_enable(clk);
+}
+
+static void __init mxs_machine_init(void)
+{
+ if (of_machine_is_compatible("fsl,imx28-evk"))
+ imx28_evk_init();
+
+ of_platform_populate(NULL, of_default_bus_match_table,
+ NULL, NULL);
+}
+
+static const char *imx28_dt_compat[] __initdata = {
+ "fsl,imx28-evk",
+ "fsl,imx28",
+ NULL,
+};
+
+DT_MACHINE_START(IMX28, "Freescale i.MX28 (Device Tree)")
+ .map_io = mx28_map_io,
+ .init_irq = mxs_dt_init_irq,
+ .timer = &imx28_timer,
+ .init_machine = mxs_machine_init,
+ .dt_compat = imx28_dt_compat,
+ .restart = mxs_restart,
+MACHINE_END