arm/dt: tegra devicetree support

Everything required to populate NVIDIA Tegra devices from the device
tree.  This patch adds a new DT_MACHINE_DESC() which matches against
a tegra20 device tree.  So far it only registers the on-chip devices,
but it will be refined in follow on patches to configure clocks and
pin IO from the device tree also.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

4 files changed, 131 insertions, 0 deletions

diff --git a/arch/arm/mach-tegra/Kconfig b/arch/arm/mach-tegra/Kconfig
index 5ec1846aa1d0..4b8abf93bd95 100644
--- a/arch/arm/mach-tegra/Kconfig
+++ b/arch/arm/mach-tegra/Kconfig
@@ -51,6 +51,12 @@ config MACH_SEABOARD
          also be included for some of the derivative boards that
          have large similarities with the seaboard design.
 
+config MACH_TEGRA_DT
+        bool "Generic Tegra board (FDT support)"
+        select USE_OF
+        help
+          Support for generic nVidia Tegra boards using Flattened Device Tree
+
 config MACH_TRIMSLICE
        bool "TrimSlice board"
        select TEGRA_PCI
diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile
index ed58ef9019b5..f11b9100114a 100644
--- a/arch/arm/mach-tegra/Makefile
+++ b/arch/arm/mach-tegra/Makefile
@@ -29,5 +29,8 @@ obj-${CONFIG_MACH_PAZ00}		+= board-paz00-pinmux.o
 obj-${CONFIG_MACH_SEABOARD}             += board-seaboard.o
 obj-${CONFIG_MACH_SEABOARD}             += board-seaboard-pinmux.o
 
+obj-${CONFIG_MACH_TEGRA_DT}             += board-dt.o
+obj-${CONFIG_MACH_TEGRA_DT}             += board-harmony-pinmux.o
+
 obj-${CONFIG_MACH_TRIMSLICE}            += board-trimslice.o
 obj-${CONFIG_MACH_TRIMSLICE}            += board-trimslice-pinmux.o
diff --git a/arch/arm/mach-tegra/Makefile.boot b/arch/arm/mach-tegra/Makefile.boot
index db52d61a7386..428ad122be03 100644
--- a/arch/arm/mach-tegra/Makefile.boot
+++ b/arch/arm/mach-tegra/Makefile.boot
@@ -1,3 +1,6 @@
 zreladdr-$(CONFIG_ARCH_TEGRA_2x_SOC)    := 0x00008000
 params_phys-$(CONFIG_ARCH_TEGRA_2x_SOC) := 0x00000100
 initrd_phys-$(CONFIG_ARCH_TEGRA_2x_SOC) := 0x00800000
+
+dtb-$(CONFIG_MACH_HARMONY) += tegra-harmony.dtb
+dtb-$(CONFIG_MACH_SEABOARD) += tegra-seaboard.dtb
diff --git a/arch/arm/mach-tegra/board-dt.c b/arch/arm/mach-tegra/board-dt.c
new file mode 100644
index 000000000000..9f47e04446f3
--- /dev/null
+++ b/arch/arm/mach-tegra/board-dt.c
@@ -0,0 +1,119 @@
+/*
+ * nVidia Tegra device tree board support
+ *
+ * Copyright (C) 2010 Secret Lab Technologies, Ltd.
+ * Copyright (C) 2010 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/serial_8250.h>
+#include <linux/clk.h>
+#include <linux/dma-mapping.h>
+#include <linux/irqdomain.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_fdt.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/pda_power.h>
+#include <linux/io.h>
+#include <linux/i2c.h>
+#include <linux/i2c-tegra.h>
+
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/time.h>
+#include <asm/setup.h>
+
+#include <mach/iomap.h>
+#include <mach/irqs.h>
+
+#include "board.h"
+#include "board-harmony.h"
+#include "clock.h"
+#include "devices.h"
+
+void harmony_pinmux_init(void);
+void seaboard_pinmux_init(void);
+
+
+struct of_dev_auxdata tegra20_auxdata_lookup[] __initdata = {
+        OF_DEV_AUXDATA("nvidia,tegra20-sdhci", TEGRA_SDMMC1_BASE, "sdhci-tegra.0", NULL),
+        OF_DEV_AUXDATA("nvidia,tegra20-sdhci", TEGRA_SDMMC2_BASE, "sdhci-tegra.1", NULL),
+        OF_DEV_AUXDATA("nvidia,tegra20-sdhci", TEGRA_SDMMC3_BASE, "sdhci-tegra.2", NULL),
+        OF_DEV_AUXDATA("nvidia,tegra20-sdhci", TEGRA_SDMMC4_BASE, "sdhci-tegra.3", NULL),
+        OF_DEV_AUXDATA("nvidia,tegra20-i2c", TEGRA_I2C_BASE, "tegra-i2c.0", NULL),
+        OF_DEV_AUXDATA("nvidia,tegra20-i2c", TEGRA_I2C2_BASE, "tegra-i2c.1", NULL),
+        OF_DEV_AUXDATA("nvidia,tegra20-i2c", TEGRA_I2C3_BASE, "tegra-i2c.2", NULL),
+        OF_DEV_AUXDATA("nvidia,tegra20-i2c", TEGRA_DVC_BASE, "tegra-i2c.3", NULL),
+        OF_DEV_AUXDATA("nvidia,tegra20-i2s", TEGRA_I2S1_BASE, "tegra-i2s.0", NULL),
+        OF_DEV_AUXDATA("nvidia,tegra20-i2s", TEGRA_I2S1_BASE, "tegra-i2s.1", NULL),
+        OF_DEV_AUXDATA("nvidia,tegra20-das", TEGRA_APB_MISC_DAS_BASE, "tegra-das", NULL),
+        {}
+};
+
+static __initdata struct tegra_clk_init_table tegra_dt_clk_init_table[] = {
+        /* name         parent          rate            enabled */
+        { "uartd",      "pll_p",        216000000,      true },
+        { NULL,         NULL,           0,              0},
+};
+
+static struct of_device_id tegra_dt_match_table[] __initdata = {
+        { .compatible = "simple-bus", },
+        {}
+};
+
+static struct of_device_id tegra_dt_gic_match[] __initdata = {
+        { .compatible = "nvidia,tegra20-gic", },
+        {}
+};
+
+static void __init tegra_dt_init(void)
+{
+        struct device_node *node;
+
+        node = of_find_matching_node_by_address(NULL, tegra_dt_gic_match,
+                                                TEGRA_ARM_INT_DIST_BASE);
+        if (node)
+                irq_domain_add_simple(node, INT_GIC_BASE);
+
+        tegra_clk_init_from_table(tegra_dt_clk_init_table);
+
+        if (of_machine_is_compatible("nvidia,harmony"))
+                harmony_pinmux_init();
+        else if (of_machine_is_compatible("nvidia,seaboard"))
+                seaboard_pinmux_init();
+
+        /*
+         * Finished with the static registrations now; fill in the missing
+         * devices
+         */
+        of_platform_populate(NULL, tegra_dt_match_table, tegra20_auxdata_lookup, NULL);
+}
+
+static const char * tegra_dt_board_compat[] = {
+        "nvidia,harmony",
+        "nvidia,seaboard",
+        NULL
+};
+
+DT_MACHINE_START(TEGRA_DT, "nVidia Tegra (Flattened Device Tree)")
+        .map_io         = tegra_map_common_io,
+        .init_early     = tegra_init_early,
+        .init_irq       = tegra_init_irq,
+        .timer          = &tegra_timer,
+        .init_machine   = tegra_dt_init,
+        .dt_compat      = tegra_dt_board_compat,
+MACHINE_END