ARM: kirkwood: add dreamplug (fdt) support.

Initially, copied guruplug-setup.c and did s/guruplug/dreamplug/g.
Then, switched to SPI based NOR flash.

After talking to Arnd Bergman, chose an incremental approach to adding
devicetree support.  First, we use the dtb to tell us we are on the
dreamplug, then we gradually port over drivers.

Driver porting will start with the uart (see next patch), and progress
from there.  Possibly, spi/flash/partitions will be next.

When done, board-dt.c will no longer be dreamplug specific, and dt's can
be made for the other kirkwood boards.

Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

4 files changed, 199 insertions, 0 deletions

diff --git a/arch/arm/mach-kirkwood/Kconfig b/arch/arm/mach-kirkwood/Kconfig
index 7fc603b4689..90ceab76192 100644
--- a/arch/arm/mach-kirkwood/Kconfig
+++ b/arch/arm/mach-kirkwood/Kconfig
@@ -44,6 +44,20 @@ config MACH_GURUPLUG
           Say 'Y' here if you want your kernel to support the
           Marvell GuruPlug Reference Board.
 
+config ARCH_KIRKWOOD_DT
+        bool "Marvell Kirkwood Flattened Device Tree"
+        select USE_OF
+        help
+          Say 'Y' here if you want your kernel to support the
+          Marvell Kirkwood using flattened device tree.
+
+config MACH_DREAMPLUG_DT
+        bool "Marvell DreamPlug (Flattened Device Tree)"
+        select ARCH_KIRKWOOD_DT
+        help
+          Say 'Y' here if you want your kernel to support the
+          Marvell DreamPlug (Flattened Device Tree).
+
 config MACH_TS219
         bool "QNAP TS-110, TS-119, TS-119P+, TS-210, TS-219, TS-219P and TS-219P+ Turbo NAS"
         help
diff --git a/arch/arm/mach-kirkwood/Makefile b/arch/arm/mach-kirkwood/Makefile
index 5dcaa81a2ec..acbc5e1db06 100644
--- a/arch/arm/mach-kirkwood/Makefile
+++ b/arch/arm/mach-kirkwood/Makefile
@@ -20,3 +20,4 @@ obj-$(CONFIG_MACH_NET5BIG_V2)		+= netxbig_v2-setup.o lacie_v2-common.o
 obj-$(CONFIG_MACH_T5325)                += t5325-setup.o
 
 obj-$(CONFIG_CPU_IDLE)                  += cpuidle.o
+obj-$(CONFIG_ARCH_KIRKWOOD_DT)          += board-dt.o
diff --git a/arch/arm/mach-kirkwood/Makefile.boot b/arch/arm/mach-kirkwood/Makefile.boot
index 760a0efe758..16f93852230 100644
--- a/arch/arm/mach-kirkwood/Makefile.boot
+++ b/arch/arm/mach-kirkwood/Makefile.boot
@@ -1,3 +1,5 @@
    zreladdr-y   += 0x00008000
 params_phys-y   := 0x00000100
 initrd_phys-y   := 0x00800000
+
+dtb-$(CONFIG_MACH_DREAMPLUG_DT) += kirkwood-dreamplug.dtb
diff --git a/arch/arm/mach-kirkwood/board-dt.c b/arch/arm/mach-kirkwood/board-dt.c
new file mode 100644
index 00000000000..76392af791d
--- /dev/null
+++ b/arch/arm/mach-kirkwood/board-dt.c
@@ -0,0 +1,182 @@
+/*
+ * Copyright 2012 (C), Jason Cooper <jason@lakedaemon.net>
+ *
+ * arch/arm/mach-kirkwood/board-dt.c
+ *
+ * Marvell DreamPlug Reference Board Setup
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/mtd/partitions.h>
+#include <linux/ata_platform.h>
+#include <linux/mv643xx_eth.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/gpio.h>
+#include <linux/leds.h>
+#include <linux/mtd/physmap.h>
+#include <linux/spi/flash.h>
+#include <linux/spi/spi.h>
+#include <linux/spi/orion_spi.h>
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+#include <mach/kirkwood.h>
+#include <plat/mvsdio.h>
+#include "common.h"
+#include "mpp.h"
+
+static struct of_device_id kirkwood_dt_match_table[] __initdata = {
+        { .compatible = "simple-bus", },
+        { }
+};
+
+struct mtd_partition dreamplug_partitions[] = {
+        {
+                .name   = "u-boot",
+                .size   = SZ_512K,
+                .offset = 0,
+        },
+        {
+                .name   = "u-boot env",
+                .size   = SZ_64K,
+                .offset = SZ_512K + SZ_512K,
+        },
+        {
+                .name   = "dtb",
+                .size   = SZ_64K,
+                .offset = SZ_512K + SZ_512K + SZ_512K,
+        },
+};
+
+static const struct flash_platform_data dreamplug_spi_slave_data = {
+        .type           = "mx25l1606e",
+        .name           = "spi_flash",
+        .parts          = dreamplug_partitions,
+        .nr_parts       = ARRAY_SIZE(dreamplug_partitions),
+};
+
+static struct spi_board_info __initdata dreamplug_spi_slave_info[] = {
+        {
+                .modalias       = "m25p80",
+                .platform_data  = &dreamplug_spi_slave_data,
+                .irq            = -1,
+                .max_speed_hz   = 50000000,
+                .bus_num        = 0,
+                .chip_select    = 0,
+        },
+};
+
+static struct mv643xx_eth_platform_data dreamplug_ge00_data = {
+        .phy_addr       = MV643XX_ETH_PHY_ADDR(0),
+};
+
+static struct mv643xx_eth_platform_data dreamplug_ge01_data = {
+        .phy_addr       = MV643XX_ETH_PHY_ADDR(1),
+};
+
+static struct mv_sata_platform_data dreamplug_sata_data = {
+        .n_ports        = 1,
+};
+
+static struct mvsdio_platform_data dreamplug_mvsdio_data = {
+        /* unfortunately the CD signal has not been connected */
+};
+
+static struct gpio_led dreamplug_led_pins[] = {
+        {
+                .name                   = "dreamplug:blue:bluetooth",
+                .gpio                   = 47,
+                .active_low             = 1,
+        },
+        {
+                .name                   = "dreamplug:green:wifi",
+                .gpio                   = 48,
+                .active_low             = 1,
+        },
+        {
+                .name                   = "dreamplug:green:wifi_ap",
+                .gpio                   = 49,
+                .active_low             = 1,
+        },
+};
+
+static struct gpio_led_platform_data dreamplug_led_data = {
+        .leds           = dreamplug_led_pins,
+        .num_leds       = ARRAY_SIZE(dreamplug_led_pins),
+};
+
+static struct platform_device dreamplug_leds = {
+        .name   = "leds-gpio",
+        .id     = -1,
+        .dev    = {
+                .platform_data  = &dreamplug_led_data,
+        }
+};
+
+static unsigned int dreamplug_mpp_config[] __initdata = {
+        MPP0_SPI_SCn,
+        MPP1_SPI_MOSI,
+        MPP2_SPI_SCK,
+        MPP3_SPI_MISO,
+        MPP47_GPIO,     /* Bluetooth LED */
+        MPP48_GPIO,     /* Wifi LED */
+        MPP49_GPIO,     /* Wifi AP LED */
+        0
+};
+
+static void __init dreamplug_init(void)
+{
+        /*
+         * Basic setup. Needs to be called early.
+         */
+        kirkwood_mpp_conf(dreamplug_mpp_config);
+
+        kirkwood_uart0_init();
+
+        spi_register_board_info(dreamplug_spi_slave_info,
+                                ARRAY_SIZE(dreamplug_spi_slave_info));
+        kirkwood_spi_init();
+
+        kirkwood_ehci_init();
+        kirkwood_ge00_init(&dreamplug_ge00_data);
+        kirkwood_ge01_init(&dreamplug_ge01_data);
+        kirkwood_sata_init(&dreamplug_sata_data);
+        kirkwood_sdio_init(&dreamplug_mvsdio_data);
+
+        platform_device_register(&dreamplug_leds);
+}
+
+static void __init kirkwood_dt_init(void)
+{
+        kirkwood_init();
+
+        if (of_machine_is_compatible("globalscale,dreamplug"))
+                dreamplug_init();
+
+        of_platform_populate(NULL, kirkwood_dt_match_table, NULL, NULL);
+}
+
+static const char *kirkwood_dt_board_compat[] = {
+        "globalscale,dreamplug",
+        NULL
+};
+
+DT_MACHINE_START(KIRKWOOD_DT, "Marvell Kirkwood (Flattened Device Tree)")
+        /* Maintainer: Jason Cooper <jason@lakedaemon.net> */
+        .map_io         = kirkwood_map_io,
+        .init_early     = kirkwood_init_early,
+        .init_irq       = kirkwood_init_irq,
+        .timer          = &kirkwood_timer,
+        .init_machine   = kirkwood_dt_init,
+        .restart        = kirkwood_restart,
+        .dt_compat      = kirkwood_dt_board_compat,
+MACHINE_END