[PATCH V2] AT91: dt: at91sam9g45 family and board device tree files
Nicolas Ferre
nicolas.ferre at atmel.com
Mon Oct 3 21:00:56 EST 2011
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 at atmel.com>
---
V2: foundation for AT91SAM generic support
- device tree focused board file
- inclusion of USART DT support
- early USART and NAND still using platform data
arch/arm/boot/dts/at91sam9g45.dtsi | 103 +++++++++++++++++++++++++
arch/arm/boot/dts/at91sam9m10g45ek.dts | 37 +++++++++
arch/arm/mach-at91/Kconfig | 11 +++
arch/arm/mach-at91/Makefile | 3 +
arch/arm/mach-at91/Makefile.boot | 2 +
arch/arm/mach-at91/at91sam9g45_devices.c | 24 +++++--
arch/arm/mach-at91/board-dt.c | 122 ++++++++++++++++++++++++++++++
7 files changed, 296 insertions(+), 6 deletions(-)
create mode 100644 arch/arm/boot/dts/at91sam9g45.dtsi
create mode 100644 arch/arm/boot/dts/at91sam9m10g45ek.dts
create mode 100644 arch/arm/mach-at91/board-dt.c
diff --git a/arch/arm/boot/dts/at91sam9g45.dtsi b/arch/arm/boot/dts/at91sam9g45.dtsi
new file mode 100644
index 0000000..7d3341f
--- /dev/null
+++ b/arch/arm/boot/dts/at91sam9g45.dtsi
@@ -0,0 +1,103 @@
+/*
+ * at91sam9g45.dtsi - Device Tree Include file for AT91SAM9G45 family SoC
+ * applies to AT91SAM9G45, AT91SAM9M10,
+ * AT91SAM9G46, AT91SAM9M11 SoC
+ *
+ * Copyright (C) 2011 Atmel,
+ * 2011 Nicolas Ferre <nicolas.ferre at atmel.com>
+ *
+ * Licensed under GPLv2 or later.
+ */
+
+/include/ "skeleton.dtsi"
+
+/ {
+ model = "Atmel AT91SAM9G45 family SoC";
+ compatible = "atmel,at91sam9g45";
+ interrupt-parent = <&aic>;
+
+ aliases {
+ serial0 = &dbgu;
+ serial1 = &usart0;
+ serial2 = &usart1;
+ serial3 = &usart2;
+ serial4 = &usart3;
+ };
+ cpus {
+ cpu at 0 {
+ compatible = "arm,arm926ejs";
+ };
+ };
+
+ memory {
+ reg = <0x70000000 0x10000000>;
+ };
+
+ ahb {
+ compatible = "simple-bus";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges;
+
+ apb {
+ compatible = "simple-bus";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges;
+
+ aic: interrupt-controller at fffff000 {
+ #interrupt-cells = <1>;
+ compatible = "atmel,at91rm9200-aic";
+ interrupt-controller;
+ reg = <0xfffff000 0x200>;
+ };
+
+ dma: dma-controller at ffffec00 {
+ compatible = "atmel,at91sam9g45-hdmac";
+ reg = <0xffffec00 0x200>;
+ interrupts = <21>;
+ atmel,hdmac-nr-channels = <8>;
+ atmel,hdmac-cap-memcpy;
+ atmel,hdmac-cap-slave;
+ };
+
+ dbgu: serial at ffffee00 {
+ compatible = "atmel,at91sam9260-usart";
+ reg = <0xffffee00 0x200>;
+ interrupts = <1>;
+ };
+
+ usart0: serial at fff8c000 {
+ compatible = "atmel,at91sam9260-usart";
+ reg = <0xfff8c000 0x4000>;
+ interrupts = <7>;
+ atmel,use-dma-rx;
+ atmel,use-dma-tx;
+ };
+
+ usart1: serial at fff90000 {
+ compatible = "atmel,at91sam9260-usart";
+ reg = <0xfff90000 0x4000>;
+ interrupts = <8>;
+ atmel,use-dma-rx;
+ atmel,use-dma-tx;
+ };
+
+ usart2: serial at fff94000 {
+ compatible = "atmel,at91sam9260-usart";
+ reg = <0xfff94000 0x4000>;
+ interrupts = <9>;
+ atmel,use-dma-rx;
+ atmel,use-dma-tx;
+ };
+
+ usart3: serial at fff98000 {
+ compatible = "atmel,at91sam9260-usart";
+ reg = <0xfff98000 0x4000>;
+ interrupts = <10>;
+ atmel,use-dma-rx;
+ atmel,use-dma-tx;
+ };
+ };
+ };
+};
diff --git a/arch/arm/boot/dts/at91sam9m10g45ek.dts b/arch/arm/boot/dts/at91sam9m10g45ek.dts
new file mode 100644
index 0000000..cf743de
--- /dev/null
+++ b/arch/arm/boot/dts/at91sam9m10g45ek.dts
@@ -0,0 +1,37 @@
+/*
+ * at91sam9m10g45ek.dts - Device Tree file for AT91SAM9M10G45-EK board
+ *
+ * Copyright (C) 2011 Atmel,
+ * 2011 Nicolas Ferre <nicolas.ferre at atmel.com>
+ *
+ * Licensed under GPLv2 or later.
+ */
+/dts-v1/;
+/include/ "at91sam9g45.dtsi"
+
+/ {
+ model = "Atmel AT91SAM9M10G45-EK";
+ compatible = "atmel,at91sam9m10g45ek", "atmel,at91sam9g45", "atmel,at91sam9";
+
+ chosen {
+ bootargs = "mem=64M console=ttyS0,115200 mtdparts=atmel_nand:4M(bootstrap/uboot/kernel)ro,60M(rootfs),-(data) root=/dev/mtdblock1 rw rootfstype=jffs2";
+ };
+
+ memory {
+ reg = <0x70000000 0x4000000>;
+ };
+
+ ahb {
+ apb {
+ usart0: serial at fff8c000 {
+ status = "disabled";
+ };
+ usart2: serial at fff94000 {
+ status = "disabled";
+ };
+ usart3: serial at fff98000 {
+ status = "disabled";
+ };
+ };
+ };
+};
diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig
index 2248467..4b59d96 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 bf57e8b..3ff245e 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 3462b81..d278863 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_devices.c b/arch/arm/mach-at91/at91sam9g45_devices.c
index bb84040..27276b8 100644
--- a/arch/arm/mach-at91/at91sam9g45_devices.c
+++ b/arch/arm/mach-at91/at91sam9g45_devices.c
@@ -69,9 +69,16 @@ static struct platform_device at_hdmac_device = {
void __init at91_add_device_hdmac(void)
{
- dma_cap_set(DMA_MEMCPY, atdma_pdata.cap_mask);
- dma_cap_set(DMA_SLAVE, atdma_pdata.cap_mask);
- platform_device_register(&at_hdmac_device);
+ struct device_node *of_node =
+ of_find_node_by_name(NULL, "dma-controller");
+
+ if (of_node) {
+ of_node_put(of_node);
+ } else {
+ dma_cap_set(DMA_MEMCPY, atdma_pdata.cap_mask);
+ dma_cap_set(DMA_SLAVE, atdma_pdata.cap_mask);
+ platform_device_register(&at_hdmac_device);
+ }
}
#else
void __init at91_add_device_hdmac(void) {}
@@ -1556,10 +1563,15 @@ void __init at91_set_serial_console(unsigned portnr)
void __init at91_add_device_serial(void)
{
int i;
+ struct device_node *of_node = of_find_node_by_name(NULL, "serial");
- for (i = 0; i < ATMEL_MAX_UART; i++) {
- if (at91_uarts[i])
- platform_device_register(at91_uarts[i]);
+ if (of_node) {
+ of_node_put(of_node);
+ } else {
+ for (i = 0; i < ATMEL_MAX_UART; i++) {
+ if (at91_uarts[i])
+ platform_device_register(at91_uarts[i]);
+ }
}
if (!atmel_default_console_device)
diff --git a/arch/arm/mach-at91/board-dt.c b/arch/arm/mach-at91/board-dt.c
new file mode 100644
index 0000000..7bcb9a9
--- /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 at atmel.com>
+ *
+ * Licensed under GPLv2 or later.
+ */
+
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/module.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/gpio.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);
+
+ /* USART0 not connected on the -EK board */
+ /* USART1 on ttyS2. (Rx, Tx, RTS, CTS) */
+ at91_register_uart(AT91SAM9G45_ID_US1, 2, ATMEL_UART_CTS | ATMEL_UART_RTS);
+
+ /* 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_device_init(void)
+{
+ irq_domain_generate_simple(aic_of_match, 0xfffff000, 0);
+
+ 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(at91sam9m10g45ek_dt, "Atmel AT91SAM (Device Tree)")
+ /* Maintainer: Atmel */
+ .timer = &at91sam926x_timer,
+ .map_io = at91_map_io,
+ .init_early = ek_init_early,
+ .init_irq = at91_init_irq_default,
+ .init_machine = at91_dt_device_init,
+ .dt_compat = at91_dt_board_compat,
+MACHINE_END
--
1.7.3
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