boards: arduino_due: Added DTS to the Arduino Due.

Change-Id: I006f9d4080a1351534ede5cc601e43526c39aa83
Origin: Original
Signed-off-by: Justin Watson <jwatson5@gmail.com>

Author: fallrisk

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

@@ -16,10 +16,6 @@ config SOC_PART_NUMBER
 	string
 	default sam3x8e if SOC_PART_NUMBER_SAM3X8E
 
-config NUM_IRQ_PRIO_BITS
-	int
-	default 3
-
 #
 # SAM3 family has total 45 peripherals capable of
 # generating interrupts.
@@ -32,29 +28,4 @@ config SYS_CLOCK_HW_CYCLES_PER_SEC
 	int
 	default 84000000
 
-#
-# SRAM address depends on the processor.
-#
-# SAM3X8E has two SRAM banks:
-#   64K @ 0x20000000
-#   32K @ 0x20080000
-# The first 64K is mirrored at 0x20070000
-# to provide one continuous 96K block.
-#
-config SRAM_SIZE
-	default 96 if SOC_PART_NUMBER_SAM3X8E
-
-config SRAM_BASE_ADDRESS
-	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
-
-config FLASH_BASE_ADDRESS
-	default 0x00080000
-
 endif # SOC_SERIES_SAM3X

boards/arm/arduino_due/arduino_due_defconfig

@@ -11,3 +11,4 @@ CONFIG_UART_ATMEL_SAM3=y
 CONFIG_SOC_ATMEL_SAM3X_EXT_MAINCK=y
 CONFIG_PINMUX=y
 CONFIG_WATCHDOG=n
+CONFIG_HAS_DTS=y

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 SoC";
+	compatible = "arduino,due", "atmel,sam3x8e", "atmel,sam3x";
+
+	aliases {
+		uart_0 = &uart0;
+	};
+
+	chosen {
+		zephyr,sram = &sram0;
+		zephyr,flash = &flash0;
+	};
+};
+
+&uart0 {
+	status = "ok";
+	current-speed = <115200>;
+};

dts/arm/arduino_due.fixup

@@ -0,0 +1,8 @@
+/* This file is a temporary workaround for mapping of the generated information
+ * to the current driver definitions.  This will be removed when the drivers
+ * are modified to handle the generated information, or the mapping of
+ * generated data matches the driver definitions.
+ */
+
+
+#define CONFIG_NUM_IRQ_PRIO_BITS	ARM_V7M_NVIC_E000E100_ARM_NUM_IRQ_PRIORITY_BITS

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
+...