ARM: at91: dt: at91sam9g45 family and board device tree files

Create a new device tree source file for Atmel at91sam9g45 SoC family.
The Evaluation Kit at91sam9m10g45ek includes it.
This first basic support will be populated as drivers and boards will be
converted to device tree.
Contains serial, dma and interrupt controllers.

The generic board file still takes advantage of platform data for early serial
init. As we need a storage media and the NAND flash driver is not converted to
DT yet, we keep old initialization for it.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Reviewed-by: Rob Herring <rob.herring@calxeda.com>

5 files changed, 144 insertions, 0 deletions

diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig
index 22484670e7ba..4b59d96e1cd8 100644
--- a/arch/arm/mach-at91/Kconfig
+++ b/arch/arm/mach-at91/Kconfig
@@ -442,6 +442,17 @@ endif
 
 # ----------------------------------------------------------
 
+comment "Generic Board Type"
+
+config MACH_AT91SAM_DT
+        bool "Atmel AT91SAM Evaluation Kits with device-tree support"
+        select USE_OF
+        help
+          Select this if you want to experiment device-tree with
+          an Atmel Evaluation Kit.
+
+# ----------------------------------------------------------
+
 comment "AT91 Board Options"
 
 config MTD_AT91_DATAFLASH_CARD
diff --git a/arch/arm/mach-at91/Makefile b/arch/arm/mach-at91/Makefile
index bf57e8b1c9d0..3ff245ebcad1 100644
--- a/arch/arm/mach-at91/Makefile
+++ b/arch/arm/mach-at91/Makefile
@@ -74,6 +74,9 @@ obj-$(CONFIG_MACH_SNAPPER_9260)	+= board-snapper9260.o
 # AT91SAM9G45 board-specific support
 obj-$(CONFIG_MACH_AT91SAM9M10G45EK) += board-sam9m10g45ek.o
 
+# AT91SAM board with device-tree
+obj-$(CONFIG_MACH_AT91SAM_DT) += board-dt.o
+
 # AT91CAP9 board-specific support
 obj-$(CONFIG_MACH_AT91CAP9ADK)  += board-cap9adk.o
 
diff --git a/arch/arm/mach-at91/Makefile.boot b/arch/arm/mach-at91/Makefile.boot
index 3462b815054a..d2788636805c 100644
--- a/arch/arm/mach-at91/Makefile.boot
+++ b/arch/arm/mach-at91/Makefile.boot
@@ -16,3 +16,5 @@ else
 params_phys-y   := 0x20000100
 initrd_phys-y   := 0x20410000
 endif
+
+dtb-$(CONFIG_MACH_AT91SAM_DT) += at91sam9m10g45ek.dtb
diff --git a/arch/arm/mach-at91/at91sam9g45.c b/arch/arm/mach-at91/at91sam9g45.c
index e04c5fb6f1ee..8baf5a1ed167 100644
--- a/arch/arm/mach-at91/at91sam9g45.c
+++ b/arch/arm/mach-at91/at91sam9g45.c
@@ -215,6 +215,12 @@ static struct clk_lookup periph_clocks_lookups[] = {
         CLKDEV_CON_DEV_ID("t0_clk", "atmel_tcb.1", &tcb0_clk),
         CLKDEV_CON_DEV_ID("pclk", "ssc.0", &ssc0_clk),
         CLKDEV_CON_DEV_ID("pclk", "ssc.1", &ssc1_clk),
+        /* more usart lookup table for DT entries */
+        CLKDEV_CON_DEV_ID("usart", "ffffee00.serial", &mck),
+        CLKDEV_CON_DEV_ID("usart", "fff8c000.serial", &usart0_clk),
+        CLKDEV_CON_DEV_ID("usart", "fff90000.serial", &usart1_clk),
+        CLKDEV_CON_DEV_ID("usart", "fff94000.serial", &usart2_clk),
+        CLKDEV_CON_DEV_ID("usart", "fff98000.serial", &usart3_clk),
 };
 
 static struct clk_lookup usart_clocks_lookups[] = {
diff --git a/arch/arm/mach-at91/board-dt.c b/arch/arm/mach-at91/board-dt.c
new file mode 100644
index 000000000000..33a0d8b549b4
--- /dev/null
+++ b/arch/arm/mach-at91/board-dt.c
@@ -0,0 +1,122 @@
+/*
+ *  Setup code for AT91SAM Evaluation Kits with Device Tree support
+ *
+ *  Covers: * AT91SAM9G45-EKES  board
+ *          * AT91SAM9M10-EKES  board
+ *          * AT91SAM9M10G45-EK board
+ *
+ *  Copyright (C) 2011 Atmel,
+ *                2011 Nicolas Ferre <nicolas.ferre@atmel.com>
+ *
+ * Licensed under GPLv2 or later.
+ */
+
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/gpio.h>
+#include <linux/irqdomain.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+
+#include <mach/hardware.h>
+#include <mach/board.h>
+#include <mach/system_rev.h>
+#include <mach/at91sam9_smc.h>
+
+#include <asm/setup.h>
+#include <asm/irq.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <asm/mach/irq.h>
+
+#include "sam9_smc.h"
+#include "generic.h"
+
+
+static void __init ek_init_early(void)
+{
+        /* Initialize processor: 12.000 MHz crystal */
+        at91_initialize(12000000);
+
+        /* DGBU on ttyS0. (Rx & Tx only) */
+        at91_register_uart(0, 0, 0);
+
+        /* set serial console to ttyS0 (ie, DBGU) */
+        at91_set_serial_console(0);
+}
+
+/* det_pin is not connected */
+static struct atmel_nand_data __initdata ek_nand_data = {
+        .ale            = 21,
+        .cle            = 22,
+        .rdy_pin        = AT91_PIN_PC8,
+        .enable_pin     = AT91_PIN_PC14,
+};
+
+static struct sam9_smc_config __initdata ek_nand_smc_config = {
+        .ncs_read_setup         = 0,
+        .nrd_setup              = 2,
+        .ncs_write_setup        = 0,
+        .nwe_setup              = 2,
+
+        .ncs_read_pulse         = 4,
+        .nrd_pulse              = 4,
+        .ncs_write_pulse        = 4,
+        .nwe_pulse              = 4,
+
+        .read_cycle             = 7,
+        .write_cycle            = 7,
+
+        .mode                   = AT91_SMC_READMODE | AT91_SMC_WRITEMODE | AT91_SMC_EXNWMODE_DISABLE,
+        .tdf_cycles             = 3,
+};
+
+static void __init ek_add_device_nand(void)
+{
+        ek_nand_data.bus_width_16 = board_have_nand_16bit();
+        /* setup bus-width (8 or 16) */
+        if (ek_nand_data.bus_width_16)
+                ek_nand_smc_config.mode |= AT91_SMC_DBW_16;
+        else
+                ek_nand_smc_config.mode |= AT91_SMC_DBW_8;
+
+        /* configure chip-select 3 (NAND) */
+        sam9_smc_configure(3, &ek_nand_smc_config);
+
+        at91_add_device_nand(&ek_nand_data);
+}
+
+static const struct of_device_id aic_of_match[] __initconst = {
+        { .compatible = "atmel,at91rm9200-aic", },
+        {},
+};
+
+static void __init at91_dt_init_irq(void)
+{
+        irq_domain_generate_simple(aic_of_match, 0xfffff000, 0);
+        at91_init_irq_default();
+}
+
+static void __init at91_dt_device_init(void)
+{
+        of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+
+        /* NAND */
+        ek_add_device_nand();
+}
+
+static const char *at91_dt_board_compat[] __initdata = {
+        "atmel,at91sam9m10g45ek",
+        NULL
+};
+
+DT_MACHINE_START(at91sam_dt, "Atmel AT91SAM (Device Tree)")
+        /* Maintainer: Atmel */
+        .timer          = &at91sam926x_timer,
+        .map_io         = at91_map_io,
+        .init_early     = ek_init_early,
+        .init_irq       = at91_dt_init_irq,
+        .init_machine   = at91_dt_device_init,
+        .dt_compat      = at91_dt_board_compat,
+MACHINE_END