boards: arduino_due: Added DTS to the Arduino Due.

arch/arm/soc/atmel_sam/Kconfig

@@ -4,10 +4,5 @@
 # SPDX-License-Identifier: Apache-2.0
 #
 
-config SOC_ATMEL_SAM3
-	bool
-	depends on ARM
-	default n
-
 # Select SoC Part No. and configuration options
 source "arch/arm/soc/atmel_sam/*/Kconfig.soc"

arch/arm/soc/atmel_sam/Kconfig.defconfig

@@ -16,7 +16,7 @@ config SOC_FAMILY
 	default atmel_sam
 
 config WATCHDOG
-	def_bool y if !SOC_ATMEL_SAM3X8E
+	def_bool y
 
 endif #SOC_FAMILY_SAM
 

arch/arm/soc/atmel_sam/sam3x/Kconfig.defconfig.series

@@ -6,19 +6,15 @@
 # SPDX-License-Identifier: Apache-2.0
 #
 
-if SOC_SERIES_SAM3X || SOC_ATMEL_SAM3X8E
+if SOC_SERIES_SAM3X
 
 config SOC_SERIES
 	string
 	default sam3x
 
 config SOC_PART_NUMBER
 	string
-	default sam3x8e if SOC_PART_NUMBER_SAM3X8E || SOC_ATMEL_SAM3X8E
-
-config NUM_IRQ_PRIO_BITS
-	int
-	default 3
+	default sam3x8e if SOC_PART_NUMBER_SAM3X8E
 
 #
 # SAM3 family has total 45 peripherals capable of
@@ -32,6 +28,12 @@ config SYS_CLOCK_HW_CYCLES_PER_SEC
 	int
 	default 84000000
 
+config NUM_IRQ_PRIO_BITS
+	int
+	default 3
+
+if !HAS_DTS
+
 #
 # SRAM address depends on the processor.
 #
@@ -42,66 +44,21 @@ config SYS_CLOCK_HW_CYCLES_PER_SEC
 # to provide one continuous 96K block.
 #
 config SRAM_SIZE
-	default 96 if SOC_PART_NUMBER_SAM3X8E || SOC_ATMEL_SAM3X8E
+	default 96 if SOC_PART_NUMBER_SAM3X8E
 
 config SRAM_BASE_ADDRESS
-	default 0x20000000 if !SOC_PART_NUMBER_SAM3X8E && !SOC_ATMEL_SAM3X8E
-	default 0x20070000 if SOC_PART_NUMBER_SAM3X8E || SOC_ATMEL_SAM3X8E
+	default 0x20000000 if !SOC_PART_NUMBER_SAM3X8E
+	default 0x20070000 if SOC_PART_NUMBER_SAM3X8E
 
 #
 # Atmel SAM3X family has flash starting @ 0x00080000.
 #
 config FLASH_SIZE
-	default 512 if SOC_PART_NUMBER_SAM3X8E || SOC_ATMEL_SAM3X8E
+	default 512 if SOC_PART_NUMBER_SAM3X8E
 
 config FLASH_BASE_ADDRESS
 	default 0x00080000
 
-if UART_ATMEL_SAM3
-
-config UART_ATMEL_SAM3_BAUD_RATE
-	default 115200
-
-config UART_ATMEL_SAM3_CLK_FREQ
-	default 84000000
-
-endif # UART_ATMEL_SAM3
-
-if GPIO
-
-config GPIO_ATMEL_SAM3
-	def_bool y
-
-config GPIO_ATMEL_SAM3_PORTA
-	default y
-
-config GPIO_ATMEL_SAM3_PORTB
-	default y
-
-config GPIO_ATMEL_SAM3_PORTC
-	default y
-
-config GPIO_ATMEL_SAM3_PORTD
-	default y
-
-endif # GPIO
-
-if I2C
-
-config I2C_ATMEL_SAM3
-	def_bool y
-
-config I2C_0
-	default y
-config I2C_0_IRQ_PRI
-	default 0
-
-config I2C_1
-	default y
-
-config I2C_1_IRQ_PRI
-	default 0
-
-endif # I2C
+endif # !HAS_DTS
 
 endif # SOC_SERIES_SAM3X

arch/arm/soc/atmel_sam/sam3x/Kconfig.series

@@ -16,13 +16,3 @@ config SOC_SERIES_SAM3X
 	help
 	  Enable support for Atmel SAM3X Cortex-M3 microcontrollers.
 	  Part No.: SAM3X8E
-
-config SOC_ATMEL_SAM3X8E
-	bool "Atmel SAM3X8E Processor"
-	select SOC_PART_NUMBER_SAM3X8E
-	select CPU_CORTEX_M
-	select CPU_CORTEX_M3
-	select SOC_FAMILY_SAM
-	select SYS_POWER_LOW_POWER_STATE_SUPPORTED
-	select CPU_HAS_SYSTICK
-	select SOC_ATMEL_SAM3

arch/arm/soc/atmel_sam/sam3x/Kconfig.soc

@@ -15,7 +15,7 @@ choice
 		bool "SAM3X8E"
 endchoice
 
-if SOC_SERIES_SAM3X || SOC_ATMEL_SAM3X8E
+if SOC_SERIES_SAM3X
 
 config SOC_ATMEL_SAM3X_EXT_SLCK
 	bool "Atmel SAM3 to use external crystal oscillator for slow clock"

boards/arm/arduino_due/Kconfig.board

@@ -1,4 +1,9 @@
+# Kconfig - Arduino Due Board configuration
+#
+# Copyright (c) 2017 Justin Watson
+# SPDX-License-Identifier: Apache-2.0
+#
 
 config BOARD_ARDUINO_DUE
 	bool "Arduino Due Board"
-	depends on SOC_ATMEL_SAM3X8E
+	depends on SOC_PART_NUMBER_SAM3X8E

boards/arm/arduino_due/Kconfig.defconfig

@@ -1,14 +1,59 @@
+# Kconfig - Arduino Due Board configuration
+#
+# Copyright (c) 2017 Justin Watson
+# SPDX-License-Identifier: Apache-2.0
+#
 
 if BOARD_ARDUINO_DUE
 
 config BOARD
 	default arduino_due
 
+if UART_ATMEL_SAM3
+
+config UART_ATMEL_SAM3_BAUD_RATE
+	default 115200
+
+config UART_ATMEL_SAM3_CLK_FREQ
+	default 84000000
+
+endif # UART_ATMEL_SAM3
+
+if GPIO
+
+config GPIO_ATMEL_SAM3
+	def_bool y
+
+config GPIO_ATMEL_SAM3_PORTA
+	default y
+
+config GPIO_ATMEL_SAM3_PORTB
+	default y
+
+config GPIO_ATMEL_SAM3_PORTC
+	default y
+
+config GPIO_ATMEL_SAM3_PORTD
+	default y
+
+endif # GPIO
+
 if I2C
 
 config I2C_ATMEL_SAM3
+	def_bool y
+
+config I2C_0
+	default y
+config I2C_0_IRQ_PRI
+	default 0
+
+config I2C_1
 	default y
 
+config I2C_1_IRQ_PRI
+	default 0
+
 endif # I2C
 
 endif # BOARD_ARDUINO_DUE

boards/arm/arduino_due/arduino_due_defconfig

@@ -1,10 +1,14 @@
 CONFIG_ARM=y
-CONFIG_SOC_ATMEL_SAM3X8E=y
+CONFIG_SOC_FAMILY_SAM=y
+CONFIG_SOC_SERIES_SAM3X=y
+CONFIG_SOC_PART_NUMBER_SAM3X8E=y
 CONFIG_BOARD_ARDUINO_DUE=y
 CONFIG_CORTEX_M_SYSTICK=y
 CONFIG_CONSOLE=y
 CONFIG_UART_CONSOLE=y
 CONFIG_SERIAL=y
 CONFIG_UART_ATMEL_SAM3=y
-CONFIG_SOC_ATMEL_SAM3_EXT_MAINCK=y
+CONFIG_SOC_ATMEL_SAM3X_EXT_MAINCK=y
 CONFIG_PINMUX=y
+CONFIG_WATCHDOG=n
+CONFIG_HAS_DTS=y

drivers/gpio/Kconfig.atmel_sam3

@@ -8,7 +8,7 @@
 
 menuconfig GPIO_ATMEL_SAM3
 	bool "Atmel SAM3 PIO Controllers"
-	depends on GPIO && SOC_ATMEL_SAM3
+	depends on GPIO && SOC_SERIES_SAM3
 	default n
 	help
 	  Enable config options to support the PIO controllers

drivers/i2c/Kconfig

@@ -46,7 +46,7 @@ config I2C_QMSI
 
 config I2C_ATMEL_SAM3
 	bool "Atmel SAM3 I2C Driver"
-	depends on SOC_ATMEL_SAM3
+	depends on SOC_SERIES_SAM3X
 	default n
 	help
 	  Enable I2C support on the Atmel SAM3 family processor.

drivers/pinmux/dev/Kconfig

@@ -24,7 +24,7 @@ config PINMUX_DEV_NAME
 
 config PINMUX_DEV_ATMEL_SAM3X
 	bool "Enable pinmux dev driver for Atmel SAM3X boards"
-	depends on PINMUX_DEV && SOC_ATMEL_SAM3X8E
+	depends on PINMUX_DEV && SOC_SERIES_SAM3
 	help
 	Enables the pinmux dev driver for boards based on the
 	Atmel SAM3X family of microcontrollers.

drivers/serial/Kconfig.atmel_sam3

@@ -2,7 +2,7 @@ menuconfig UART_ATMEL_SAM3
 	bool "Atmel SAM3 family processor UART driver"
 	default n
 	select SERIAL_HAS_DRIVER
-	depends on SOC_ATMEL_SAM3
+	depends on SOC_SERIES_SAM3
 	help
 	This option enables the UART driver for Atmel SAM3
 	family processors. Note that there is only one

dts/arm/Makefile

@@ -29,6 +29,7 @@ dtb-$(CONFIG_BOARD_NRF51_BLENANO)	=	nrf51_blenano.dts_compiled
 dtb-$(CONFIG_BOARD_NRF51_PCA10028)	=	nrf51_pca10028.dts_compiled
 dtb-$(CONFIG_BOARD_QUARK_SE_C1000_BLE)	=	quark_se_c1000_ble.dts_compiled
 dtb-$(CONFIG_BOARD_QEMU_CORTEX_M3)	=	qemu_cortex_m3.dts_compiled
+dtb-$(CONFIG_BOARD_ARDUINO_DUE)		=	arduino_due.dts_compiled
 
 always	:= $(dtb-y)
 endif

dts/arm/arduino_due.dts

@@ -0,0 +1,22 @@
+/dts-v1/;
+
+#include <atmel/sam3x.dtsi>
+
+/ {
+	model = "Arduino Due with an Atmel SAM3X8E";
+	compatible = "atmel,sam3x";
+
+	aliases {
+		uart_0 = &uart0;
+	};
+
+	chosen {
+		zephyr,sram = &sram0;
+		zephyr,flash = &flash0;
+	};
+};
+
+&uart0 {
+	status = "ok";
+	current-speed = <115200>;
+};

dts/arm/atmel/sam3x.dtsi

@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2017 Justin Watson
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <arm/armv7-m.dtsi>
+
+/ {
+	cpus {
+		cpu@0 {
+			compatible = "arm,cortex-m4";
+		};
+	};
+
+	sram0: memory {
+		compatible = "sram";
+		reg = <0x20070000 0x18000>;
+	};
+
+	flash0: flash {
+		compatible = "flash";
+		reg = <0x00080000 0x80000>;
+	};
+
+	soc {
+		uart0: uart@400E0800 {
+			compatible = "atmel,sam3x-uart";
+			reg = <0x400E0800 0x124>;
+			interrupts = <8 0>;
+			status = "disabled";
+		};
+	};
+};
+
+&nvic {
+	arm,num-irq-priority-bits = <3>;
+};

dts/arm/yaml/atmel,sam3x-uart.yaml

@@ -0,0 +1,30 @@
+---
+title: SAM3X UART
+id: atmel,sam3x-uart
+version: 0.1
+
+description: >
+    This binding gives a base representation of the SAM3X UART
+
+inherits:
+  - !include uart.yaml
+
+properties:
+  - compatible:
+      type: string
+      category: required
+      description: compatible strings
+      constraint: "atmel,sam3x-uart"
+
+  - reg:
+      type: array
+      description: mmio register space
+      generation: define
+      category: required
+
+  - interrupts:
+      type: array
+      category: required
+      description: required interrupts
+      generation: define
+...

samples/drivers/gpio/src/main.c

@@ -114,7 +114,7 @@
 #define GPIO_OUT_PIN	16
 #define GPIO_INT_PIN	19
 #define GPIO_NAME	"GPIO_"
-#elif defined(CONFIG_SOC_ATMEL_SAM3)
+#elif defined(CONFIG_SOC_PART_NUMBER_SAM3X8E)
 #define GPIO_OUT_PIN	25
 #define GPIO_INT_PIN	27
 #define GPIO_NAME	"GPIO_"

samples/drivers/lcd_hd44780/src/main.c

@@ -71,13 +71,13 @@
 #include <string.h>
 
 
-#if defined(CONFIG_GPIO_ATMEL_SAM3)
+#if defined(CONFIG_SOC_PART_NUMBER_SAM3X8E)
 #define GPIO_DRV_NAME CONFIG_GPIO_ATMEL_SAM3_PORTC_DEV_NAME
 #else
 #error "Unsupported GPIO driver"
 #endif
 
-#if defined(CONFIG_SOC_ATMEL_SAM3)
+#if defined(CONFIG_SOC_PART_NUMBER_SAM3X8E)
 /* Define GPIO OUT to LCD */
 #define GPIO_PIN_PC12_D0		12	/* PC12 - pin 51 */
 #define GPIO_PIN_PC13_D1		13	/* PC13 - pin 50 */