ARM: OMAP2+: board-generic: Add DT support to generic board

Re-cycle the original board-generic.c file to support Device Tree
for every OMAP2+ variants.

The current approach is an intermediate step before having only
one machine descriptor that will use some generic DT aware
functions.

Signed-off-by: Benoit Cousson <b-cousson@ti.com>
Cc: Tony Lindgren <tony@atomide.com>

1 files changed, 84 insertions, 43 deletions

diff --git a/arch/arm/mach-omap2/board-generic.c b/arch/arm/mach-omap2/board-generic.c
index 5223898f50e4..62c6b2e8b5d7 100644
--- a/arch/arm/mach-omap2/board-generic.c
+++ b/arch/arm/mach-omap2/board-generic.c
@@ -1,76 +1,117 @@
 /*
- * linux/arch/arm/mach-omap2/board-generic.c
- *
  * Copyright (C) 2005 Nokia Corporation
  * Author: Paul Mundt <paul.mundt@nokia.com>
  *
- * Modified from mach-omap/omap1/board-generic.c
+ * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
  *
- * Code for generic OMAP2 board. Should work on many OMAP2 systems where
- * the bootloader passes the board-specific data to the kernel.
- * Do not put any board specific code to this file; create a new machine
- * type if you need custom low-level initializations.
+ * Modified from the original mach-omap/omap2/board-generic.c did by Paul
+ * to support the OMAP2+ device tree boards with an unique board file.
  *
  * 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/kernel.h>
-#include <linux/init.h>
-#include <linux/device.h>
+#include <linux/io.h>
+#include <linux/of_platform.h>
+#include <linux/irqdomain.h>
 
 #include <mach/hardware.h>
-#include <asm/mach-types.h>
 #include <asm/mach/arch.h>
-#include <asm/mach/map.h>
 
-#include <mach/gpio.h>
-#include <plat/usb.h>
 #include <plat/board.h>
 #include <plat/common.h>
+#include <mach/omap4-common.h>
+
 
-static struct omap_board_config_kernel generic_config[] = {
+static struct of_device_id omap_dt_match_table[] __initdata = {
+        { .compatible = "simple-bus", },
+        { .compatible = "ti,omap-infra", },
+        { }
 };
 
-static void __init omap_generic_init_early(void)
-{
-        omap2_init_common_infrastructure();
-}
+static struct of_device_id intc_match[] __initdata = {
+        { .compatible = "ti,omap3-intc", },
+        { .compatible = "arm,cortex-a9-gic", },
+        { }
+};
 
 static void __init omap_generic_init(void)
 {
+        struct device_node *node = of_find_matching_node(NULL, intc_match);
+        if (node)
+                irq_domain_add_simple(node, 0);
+
         omap_serial_init();
         omap_sdrc_init(NULL, NULL);
-        omap_board_config = generic_config;
-        omap_board_config_size = ARRAY_SIZE(generic_config);
-}
 
-static void __init omap_generic_map_io(void)
-{
-        if (cpu_is_omap242x()) {
-                omap2_set_globals_242x();
-                omap242x_map_common_io();
-        } else if (cpu_is_omap243x()) {
-                omap2_set_globals_243x();
-                omap243x_map_common_io();
-        } else if (cpu_is_omap34xx()) {
-                omap2_set_globals_3xxx();
-                omap34xx_map_common_io();
-        } else if (cpu_is_omap44xx()) {
-                omap2_set_globals_443x();
-                omap44xx_map_common_io();
-        }
+        of_platform_populate(NULL, omap_dt_match_table, NULL, NULL);
 }
 
-/* XXX This machine entry name should be updated */
-MACHINE_START(OMAP_GENERIC, "Generic OMAP24xx")
-        /* Maintainer: Paul Mundt <paul.mundt@nokia.com> */
-        .boot_params    = 0x80000100,
+#if defined(CONFIG_SOC_OMAP2420)
+static const char *omap242x_boards_compat[] __initdata = {
+        "ti,omap2420",
+        NULL,
+};
+
+DT_MACHINE_START(OMAP242X_DT, "Generic OMAP2420 (Flattened Device Tree)")
+        .reserve        = omap_reserve,
+        .map_io         = omap242x_map_io,
+        .init_early     = omap2420_init_early,
+        .init_irq       = omap2_init_irq,
+        .init_machine   = omap_generic_init,
+        .timer          = &omap2_timer,
+        .dt_compat      = omap242x_boards_compat,
+MACHINE_END
+#endif
+
+#if defined(CONFIG_SOC_OMAP2430)
+static const char *omap243x_boards_compat[] __initdata = {
+        "ti,omap2430",
+        NULL,
+};
+
+DT_MACHINE_START(OMAP243X_DT, "Generic OMAP2430 (Flattened Device Tree)")
         .reserve        = omap_reserve,
-        .map_io         = omap_generic_map_io,
-        .init_early     = omap_generic_init_early,
+        .map_io         = omap243x_map_io,
+        .init_early     = omap2430_init_early,
         .init_irq       = omap2_init_irq,
         .init_machine   = omap_generic_init,
         .timer          = &omap2_timer,
+        .dt_compat      = omap243x_boards_compat,
+MACHINE_END
+#endif
+
+#if defined(CONFIG_ARCH_OMAP3)
+static const char *omap3_boards_compat[] __initdata = {
+        "ti,omap3",
+        NULL,
+};
+
+DT_MACHINE_START(OMAP3_DT, "Generic OMAP3 (Flattened Device Tree)")
+        .reserve        = omap_reserve,
+        .map_io         = omap3_map_io,
+        .init_early     = omap3430_init_early,
+        .init_irq       = omap3_init_irq,
+        .init_machine   = omap_generic_init,
+        .timer          = &omap3_timer,
+        .dt_compat      = omap3_boards_compat,
+MACHINE_END
+#endif
+
+#if defined(CONFIG_ARCH_OMAP4)
+static const char *omap4_boards_compat[] __initdata = {
+        "ti,omap4",
+        NULL,
+};
+
+DT_MACHINE_START(OMAP4_DT, "Generic OMAP4 (Flattened Device Tree)")
+        .reserve        = omap_reserve,
+        .map_io         = omap4_map_io,
+        .init_early     = omap4430_init_early,
+        .init_irq       = gic_init_irq,
+        .init_machine   = omap_generic_init,
+        .timer          = &omap4_timer,
+        .dt_compat      = omap4_boards_compat,
 MACHINE_END
+#endif