ARM i.MX31: Add devicetree support

This patch adds basic devicetree support for i.MX31 based SoCs.

Only the UART and interrupts bindings are added.

Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo@no-log.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 63 insertions, 0 deletions

diff --git a/arch/arm/mach-imx/imx31-dt.c b/arch/arm/mach-imx/imx31-dt.c
new file mode 100644
index 000000000000..a68ba207b2b7
--- /dev/null
+++ b/arch/arm/mach-imx/imx31-dt.c
@@ -0,0 +1,63 @@
+/*
+ * Copyright 2012 Sascha Hauer, Pengutronix
+ *
+ * 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_irq.h>
+#include <linux/of_platform.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/time.h>
+#include <mach/common.h>
+#include <mach/mx31.h>
+
+static const struct of_dev_auxdata imx31_auxdata_lookup[] __initconst = {
+        OF_DEV_AUXDATA("fsl,imx31-uart", MX31_UART1_BASE_ADDR,
+                        "imx21-uart.0", NULL),
+        OF_DEV_AUXDATA("fsl,imx31-uart", MX31_UART2_BASE_ADDR,
+                        "imx21-uart.1", NULL),
+        OF_DEV_AUXDATA("fsl,imx31-uart", MX31_UART3_BASE_ADDR,
+                        "imx21-uart.2", NULL),
+        OF_DEV_AUXDATA("fsl,imx31-uart", MX31_UART4_BASE_ADDR,
+                        "imx21-uart.3", NULL),
+        OF_DEV_AUXDATA("fsl,imx31-uart", MX31_UART5_BASE_ADDR,
+                        "imx21-uart.4", NULL),
+        { /* sentinel */ }
+};
+
+static void __init imx31_dt_init(void)
+{
+        of_platform_populate(NULL, of_default_bus_match_table,
+                             imx31_auxdata_lookup, NULL);
+}
+
+static void __init imx31_timer_init(void)
+{
+        mx31_clocks_init_dt();
+}
+
+static struct sys_timer imx31_timer = {
+        .init = imx31_timer_init,
+};
+
+static const char *imx31_dt_board_compat[] __initdata = {
+        "fsl,imx31",
+        NULL
+};
+
+DT_MACHINE_START(IMX31_DT, "Freescale i.MX31 (Device Tree Support)")
+        .map_io         = mx31_map_io,
+        .init_early     = imx31_init_early,
+        .init_irq       = mx31_init_irq,
+        .handle_irq     = imx31_handle_irq,
+        .timer          = &imx31_timer,
+        .init_machine   = imx31_dt_init,
+        .dt_compat      = imx31_dt_board_compat,
+        .restart        = mxc_restart,
+MACHINE_END