ARM: davinci: da850: add DT boot support

Add support for booting DA850 using flattened device
tree to describe the hardware. At this time only the
very basic bootup using a serial console is supported.

Signed-off-by: Sekhar Nori <nsekhar@ti.com>

3 files changed, 73 insertions, 0 deletions

diff --git a/arch/arm/mach-davinci/Kconfig b/arch/arm/mach-davinci/Kconfig
index f8eecb959413..0153950f6068 100644
--- a/arch/arm/mach-davinci/Kconfig
+++ b/arch/arm/mach-davinci/Kconfig
@@ -58,6 +58,14 @@ config ARCH_DAVINCI_TNETV107X
 
 comment "DaVinci Board Type"
 
+config MACH_DA8XX_DT
+        bool "Support DA8XX platforms using device tree"
+        default y
+        depends on ARCH_DAVINCI_DA8XX
+        help
+          Say y here to include support for TI DaVinci DA850 based using
+          Flattened Device Tree. More information at Documentation/devicetree
+
 config MACH_DAVINCI_EVM
         bool "TI DM644x EVM"
         default ARCH_DAVINCI_DM644x
diff --git a/arch/arm/mach-davinci/Makefile b/arch/arm/mach-davinci/Makefile
index 2227effcb0e9..fb5c1aa98a63 100644
--- a/arch/arm/mach-davinci/Makefile
+++ b/arch/arm/mach-davinci/Makefile
@@ -22,6 +22,7 @@ obj-$(CONFIG_AINTC)			+= irq.o
 obj-$(CONFIG_CP_INTC)                   += cp_intc.o
 
 # Board specific
+obj-$(CONFIG_MACH_DA8XX_DT)             += da8xx-dt.o
 obj-$(CONFIG_MACH_DAVINCI_EVM)          += board-dm644x-evm.o
 obj-$(CONFIG_MACH_SFFSDR)               += board-sffsdr.o
 obj-$(CONFIG_MACH_NEUROS_OSD2)          += board-neuros-osd2.o
diff --git a/arch/arm/mach-davinci/da8xx-dt.c b/arch/arm/mach-davinci/da8xx-dt.c
new file mode 100644
index 000000000000..df393d9b1517
--- /dev/null
+++ b/arch/arm/mach-davinci/da8xx-dt.c
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * Modified from mach-omap/omap2/board-generic.c
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/io.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/irqdomain.h>
+
+#include <asm/mach/arch.h>
+
+#include <mach/common.h>
+#include <mach/cp_intc.h>
+#include <mach/da8xx.h>
+
+#define DA8XX_NUM_UARTS 3
+
+void __init da8xx_uart_clk_enable(void)
+{
+        int i;
+        for (i = 0; i < DA8XX_NUM_UARTS; i++)
+                davinci_serial_setup_clk(i, NULL);
+}
+
+static struct of_device_id da8xx_irq_match[] __initdata = {
+        { .compatible = "ti,cp-intc", .data = cp_intc_of_init, },
+        { }
+};
+
+static void __init da8xx_init_irq(void)
+{
+        of_irq_init(da8xx_irq_match);
+}
+
+#ifdef CONFIG_ARCH_DAVINCI_DA850
+
+static void __init da850_init_machine(void)
+{
+        of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+
+        da8xx_uart_clk_enable();
+}
+
+static const char *da850_boards_compat[] __initdata = {
+        "ti,da850",
+        NULL,
+};
+
+DT_MACHINE_START(DA850_DT, "Generic DA850/OMAP-L138/AM18x")
+        .map_io         = da850_init,
+        .init_irq       = da8xx_init_irq,
+        .timer          = &davinci_timer,
+        .init_machine   = da850_init_machine,
+        .dt_compat      = da850_boards_compat,
+        .init_late      = davinci_init_late,
+        .restart        = da8xx_restart,
+MACHINE_END
+
+#endif