[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
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+ARM Atmel SoCs (aka AT91)
+=========================
+
+
+Introduction
+------------
+This document gives useful information about the ARM Atmel SoCs that are
+currently supported in Linux Mainline (you know, the one on kernel.org).
+
+It is important to note that the Atmel | SMART ARM-based MPU product line is
+historically named "AT91" or "at91" throughout the Linux kernel development
+process even if this product prefix has completely disappeared from the
+official Atmel product name. Anyway, files, directories, git trees,
+git branches/tags and email subject always contain this "at91" sub-string.
+
+
+AT91 SoCs
+---------
+Documentation and detailed datasheet for each product are available on
+the Atmel website: http://www.atmel.com.
+
+ Flavors:
+ * ARM 920 based SoC
+ - at91rm9200
+ + Datasheet
+ http://www.atmel.com/Images/doc1768.pdf
+
+ * ARM 926 based SoCs
+ - at91sam9260
+ + Datasheet
+ http://www.atmel.com/Images/doc6221.pdf
+
+ - at91sam9xe
+ + Datasheet
+ http://www.atmel.com/Images/Atmel-6254-32-bit-ARM926EJ-S-Embedded-Microprocessor-SAM9XE_Datasheet.pdf
+
+ - at91sam9261
+ + Datasheet
+ http://www.atmel.com/Images/doc6062.pdf
+
+ - at91sam9263
+ + Datasheet
+ http://www.atmel.com/Images/Atmel_6249_32-bit-ARM926EJ-S-Microcontroller_SAM9263_Datasheet.pdf
+
+ - at91sam9rl
+ + Datasheet
+ http://www.atmel.com/Images/doc6289.pdf
+
+ - at91sam9g20
+ + Datasheet
+ http://www.atmel.com/Images/doc6384.pdf
+
+ - at91sam9g45 family
+ - at91sam9g45
+ - at91sam9g46
+ - at91sam9m10
+ - at91sam9m11 (device superset)
+ + Datasheet
+ http://www.atmel.com/Images/Atmel-6437-32-bit-ARM926-Embedded-Microprocessor-SAM9M11_Datasheet.pdf
+
+ - at91sam9x5 family (aka "The 5 series")
+ - at91sam9g15
+ - at91sam9g25
+ - at91sam9g35
+ - at91sam9x25
+ - at91sam9x35
+ + Datasheet (can be considered as covering the whole family)
+ http://www.atmel.com/Images/Atmel_11055_32-bit-ARM926EJ-S-Microcontroller_SAM9X35_Datasheet.pdf
+
+ - at91sam9n12
+ + Datasheet
+ http://www.atmel.com/Images/Atmel_11063_32-bit-ARM926EJ-S-Microcontroller_SAM9N12CN11CN12_Datasheet.pdf
+
+ * ARM Cortex-A5 based SoCs
+ - sama5d3 family
+ - sama5d31
+ - sama5d33
+ - sama5d34
+ - sama5d35
+ - sama5d36 (device superset)
+ + Datasheet
+ http://www.atmel.com/Images/Atmel-11121-32-bit-Cortex-A5-Microcontroller-SAMA5D3_Datasheet.pdf
+
+ * ARM Cortex-A5 + NEON based SoCs
+ - sama5d4 family
+ - sama5d41
+ - sama5d42
+ - sama5d43
+ - sama5d44 (device superset)
+ + Datasheet
+ http://www.atmel.com/Images/Atmel-11238-32-bit-Cortex-A5-Microcontroller-SAMA5D4_Datasheet.pdf
+
+ - sama5d2 family
+ - sama5d21
+ - sama5d22
+ - sama5d23
+ - sama5d24
+ - sama5d26
+ - sama5d27 (device superset)
+ - sama5d28 (device superset + environmental monitors)
+ + Datasheet
+ http://www.atmel.com/Images/Atmel-11267-32-bit-Cortex-A5-Microcontroller-SAMA5D2_Datasheet.pdf
+
+ * ARM Cortex-M7 MCUs
+ - sams70 family
+ - sams70j19
+ - sams70j20
+ - sams70j21
+ - sams70n19
+ - sams70n20
+ - sams70n21
+ - sams70q19
+ - sams70q20
+ - sams70q21
+ + Datasheet
+ http://www.atmel.com/Images/Atmel-11242-32-bit-Cortex-M7-Microcontroller-SAM-S70Q-SAM-S70N-SAM-S70J_Datasheet.pdf
+
+ - samv70 family
+ - samv70j19
+ - samv70j20
+ - samv70n19
+ - samv70n20
+ - samv70q19
+ - samv70q20
+ + Datasheet
+ http://www.atmel.com/Images/Atmel-11297-32-bit-Cortex-M7-Microcontroller-SAM-V70Q-SAM-V70N-SAM-V70J_Datasheet.pdf
+
+ - samv71 family
+ - samv71j19
+ - samv71j20
+ - samv71j21
+ - samv71n19
+ - samv71n20
+ - samv71n21
+ - samv71q19
+ - samv71q20
+ - samv71q21
+ + Datasheet
+ http://www.atmel.com/Images/Atmel-44003-32-bit-Cortex-M7-Microcontroller-SAM-V71Q-SAM-V71N-SAM-V71J_Datasheet.pdf
+
+Linux kernel information
+------------------------
+Linux kernel mach directory: arch/arm/mach-at91
+MAINTAINERS entry is: "ARM/ATMEL AT91RM9200 AND AT91SAM ARM ARCHITECTURES"
+
+
+Device Tree for AT91 SoCs and boards
+------------------------------------
+All AT91 SoCs are converted to Device Tree. Since Linux 3.19, these products
+must use this method to boot the Linux kernel.
+
+Work In Progress statement:
+Device Tree files and Device Tree bindings that apply to AT91 SoCs and boards are
+considered as "Unstable". To be completely clear, any at91 binding can change at
+any time. So, be sure to use a Device Tree Binary and a Kernel Image generated from
+the same source tree.
+Please refer to the Documentation/devicetree/bindings/ABI.txt file for a
+definition of a "Stable" binding/ABI.
+This statement will be removed by AT91 MAINTAINERS when appropriate.
+
+Naming conventions and best practice:
+- SoCs Device Tree Source Include files are named after the official name of
+ the product (at91sam9g20.dtsi or sama5d33.dtsi for instance).
+- Device Tree Source Include files (.dtsi) are used to collect common nodes that can be
+ shared across SoCs or boards (sama5d3.dtsi or at91sam9x5cm.dtsi for instance).
+ When collecting nodes for a particular peripheral or topic, the identifier have to
+ be placed at the end of the file name, separated with a "_" (at91sam9x5_can.dtsi
+ or sama5d3_gmac.dtsi for example).
+- board Device Tree Source files (.dts) are prefixed by the string "at91-" so
+ that they can be identified easily. Note that some files are historical exceptions
+ to this rule (sama5d3[13456]ek.dts, usb_a9g20.dts or animeo_ip.dts for example).