Documentation/arm/Microchip/README

   1 ARM Microchip SoCs (aka AT91)
   2 =============================
   3
   4
   5 Introduction
   6 ------------
   7 This document gives useful information about the ARM Microchip SoCs that are
   8 currently supported in Linux Mainline (you know, the one on kernel.org).
   9
  10 It is important to note that the Microchip (previously Atmel) ARM-based MPU
  11 product line is historically named "AT91" or "at91" throughout the Linux kernel
  12 development process even if this product prefix has completely disappeared from
  13 the official Microchip product name. Anyway, files, directories, git trees,
  14 git branches/tags and email subject always contain this "at91" sub-string.
  15
  16
  17 AT91 SoCs
  18 ---------
  19 Documentation and detailed datasheet for each product are available on
  20 the Microchip website: http://www.microchip.com.
  21
  22   Flavors:
  23     * ARM 920 based SoC
  24       - at91rm9200
  25         + Datasheet
  26           http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-1768-32-bit-ARM920T-Embedded-Microprocessor-AT91RM9200_Datasheet.pdf
  27
  28     * ARM 926 based SoCs
  29       - at91sam9260
  30         + Datasheet
  31           http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-6221-32-bit-ARM926EJ-S-Embedded-Microprocessor-SAM9260_Datasheet.pdf
  32
  33       - at91sam9xe
  34         + Datasheet
  35           http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-6254-32-bit-ARM926EJ-S-Embedded-Microprocessor-SAM9XE_Datasheet.pdf
  36
  37       - at91sam9261
  38         + Datasheet
  39           http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-6062-ARM926EJ-S-Microprocessor-SAM9261_Datasheet.pdf
  40
  41       - at91sam9263
  42         + Datasheet
  43           http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-6249-32-bit-ARM926EJ-S-Embedded-Microprocessor-SAM9263_Datasheet.pdf
  44
  45       - at91sam9rl
  46         + Datasheet
  47           http://ww1.microchip.com/downloads/en/DeviceDoc/doc6289.pdf
  48
  49       - at91sam9g20
  50         + Datasheet
  51           http://ww1.microchip.com/downloads/en/DeviceDoc/DS60001516A.pdf
  52
  53       - at91sam9g45 family
  54         - at91sam9g45
  55         - at91sam9g46
  56         - at91sam9m10
  57         - at91sam9m11 (device superset)
  58         + Datasheet
  59           http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-6437-32-bit-ARM926-Embedded-Microprocessor-SAM9M11_Datasheet.pdf
  60
  61       - at91sam9x5 family (aka "The 5 series")
  62         - at91sam9g15
  63         - at91sam9g25
  64         - at91sam9g35
  65         - at91sam9x25
  66         - at91sam9x35
  67         + Datasheet (can be considered as covering the whole family)
  68           http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-11055-32-bit-ARM926EJ-S-Microcontroller-SAM9X35_Datasheet.pdf
  69
  70       - at91sam9n12
  71         + Datasheet
  72           http://ww1.microchip.com/downloads/en/DeviceDoc/DS60001517A.pdf
  73
  74     * ARM Cortex-A5 based SoCs
  75       - sama5d3 family
  76         - sama5d31
  77         - sama5d33
  78         - sama5d34
  79         - sama5d35
  80         - sama5d36 (device superset)
  81         + Datasheet
  82           http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-11121-32-bit-Cortex-A5-Microcontroller-SAMA5D3_Datasheet.pdf
  83
  84     * ARM Cortex-A5 + NEON based SoCs
  85       - sama5d4 family
  86         - sama5d41
  87         - sama5d42
  88         - sama5d43
  89         - sama5d44 (device superset)
  90         + Datasheet
  91           http://ww1.microchip.com/downloads/en/DeviceDoc/60001525A.pdf
  92
  93       - sama5d2 family
  94         - sama5d21
  95         - sama5d22
  96         - sama5d23
  97         - sama5d24
  98         - sama5d26
  99         - sama5d27 (device superset)
 100         - sama5d28 (device superset + environmental monitors)
 101         + Datasheet
 102           http://ww1.microchip.com/downloads/en/DeviceDoc/DS60001476B.pdf
 103
 104     * ARM Cortex-M7 MCUs
 105       - sams70 family
 106         - sams70j19
 107         - sams70j20
 108         - sams70j21
 109         - sams70n19
 110         - sams70n20
 111         - sams70n21
 112         - sams70q19
 113         - sams70q20
 114         - sams70q21
 115
 116       - samv70 family
 117         - samv70j19
 118         - samv70j20
 119         - samv70n19
 120         - samv70n20
 121         - samv70q19
 122         - samv70q20
 123
 124       - samv71 family
 125         - samv71j19
 126         - samv71j20
 127         - samv71j21
 128         - samv71n19
 129         - samv71n20
 130         - samv71n21
 131         - samv71q19
 132         - samv71q20
 133         - samv71q21
 134
 135         + Datasheet
 136           http://ww1.microchip.com/downloads/en/DeviceDoc/60001527A.pdf
 137
 138
 139 Linux kernel information
 140 ------------------------
 141 Linux kernel mach directory: arch/arm/mach-at91
 142 MAINTAINERS entry is: "ARM/Microchip (AT91) SoC support"
 143
 144
 145 Device Tree for AT91 SoCs and boards
 146 ------------------------------------
 147 All AT91 SoCs are converted to Device Tree. Since Linux 3.19, these products
 148 must use this method to boot the Linux kernel.
 149
 150 Work In Progress statement:
 151 Device Tree files and Device Tree bindings that apply to AT91 SoCs and boards are
 152 considered as "Unstable". To be completely clear, any at91 binding can change at
 153 any time. So, be sure to use a Device Tree Binary and a Kernel Image generated from
 154 the same source tree.
 155 Please refer to the Documentation/devicetree/bindings/ABI.txt file for a
 156 definition of a "Stable" binding/ABI.
 157 This statement will be removed by AT91 MAINTAINERS when appropriate.
 158
 159 Naming conventions and best practice:
 160 - SoCs Device Tree Source Include files are named after the official name of
 161   the product (at91sam9g20.dtsi or sama5d33.dtsi for instance).
 162 - Device Tree Source Include files (.dtsi) are used to collect common nodes that can be
 163   shared across SoCs or boards (sama5d3.dtsi or at91sam9x5cm.dtsi for instance).
 164   When collecting nodes for a particular peripheral or topic, the identifier have to
 165   be placed at the end of the file name, separated with a "_" (at91sam9x5_can.dtsi
 166   or sama5d3_gmac.dtsi for example).
 167 - board Device Tree Source files (.dts) are prefixed by the string "at91-" so
 168   that they can be identified easily. Note that some files are historical exceptions
 169   to this rule (sama5d3[13456]ek.dts, usb_a9g20.dts or animeo_ip.dts for example).