Documentation/arm/microchip.rst

   1 =============================
   2 ARM Microchip SoCs (aka AT91)
   3 =============================
   4
   5
   6 Introduction
   7 ------------
   8 This document gives useful information about the ARM Microchip SoCs that are
   9 currently supported in Linux Mainline (you know, the one on kernel.org).
  10
  11 It is important to note that the Microchip (previously Atmel) ARM-based MPU
  12 product line is historically named "AT91" or "at91" throughout the Linux kernel
  13 development process even if this product prefix has completely disappeared from
  14 the official Microchip product name. Anyway, files, directories, git trees,
  15 git branches/tags and email subject always contain this "at91" sub-string.
  16
  17
  18 AT91 SoCs
  19 ---------
  20 Documentation and detailed datasheet for each product are available on
  21 the Microchip website: http://www.microchip.com.
  22
  23   Flavors:
  24     * ARM 920 based SoC
  25       - at91rm9200
  26
  27           * Datasheet
  28
  29           http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-1768-32-bit-ARM920T-Embedded-Microprocessor-AT91RM9200_Datasheet.pdf
  30
  31     * ARM 926 based SoCs
  32       - at91sam9260
  33
  34           * Datasheet
  35
  36           http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-6221-32-bit-ARM926EJ-S-Embedded-Microprocessor-SAM9260_Datasheet.pdf
  37
  38       - at91sam9xe
  39
  40           * Datasheet
  41
  42           http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-6254-32-bit-ARM926EJ-S-Embedded-Microprocessor-SAM9XE_Datasheet.pdf
  43
  44       - at91sam9261
  45
  46           * Datasheet
  47
  48           http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-6062-ARM926EJ-S-Microprocessor-SAM9261_Datasheet.pdf
  49
  50       - at91sam9263
  51
  52           * Datasheet
  53
  54           http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-6249-32-bit-ARM926EJ-S-Embedded-Microprocessor-SAM9263_Datasheet.pdf
  55
  56       - at91sam9rl
  57
  58           * Datasheet
  59
  60           http://ww1.microchip.com/downloads/en/DeviceDoc/doc6289.pdf
  61
  62       - at91sam9g20
  63
  64           * Datasheet
  65
  66           http://ww1.microchip.com/downloads/en/DeviceDoc/DS60001516A.pdf
  67
  68       - at91sam9g45 family
  69         - at91sam9g45
  70         - at91sam9g46
  71         - at91sam9m10
  72         - at91sam9m11 (device superset)
  73
  74           * Datasheet
  75
  76           http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-6437-32-bit-ARM926-Embedded-Microprocessor-SAM9M11_Datasheet.pdf
  77
  78       - at91sam9x5 family (aka "The 5 series")
  79         - at91sam9g15
  80         - at91sam9g25
  81         - at91sam9g35
  82         - at91sam9x25
  83         - at91sam9x35
  84
  85           * Datasheet (can be considered as covering the whole family)
  86
  87           http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-11055-32-bit-ARM926EJ-S-Microcontroller-SAM9X35_Datasheet.pdf
  88
  89       - at91sam9n12
  90
  91           * Datasheet
  92
  93           http://ww1.microchip.com/downloads/en/DeviceDoc/DS60001517A.pdf
  94
  95     * ARM Cortex-A5 based SoCs
  96       - sama5d3 family
  97
  98         - sama5d31
  99         - sama5d33
 100         - sama5d34
 101         - sama5d35
 102         - sama5d36 (device superset)
 103
 104           * Datasheet
 105
 106           http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-11121-32-bit-Cortex-A5-Microcontroller-SAMA5D3_Datasheet.pdf
 107
 108     * ARM Cortex-A5 + NEON based SoCs
 109       - sama5d4 family
 110
 111         - sama5d41
 112         - sama5d42
 113         - sama5d43
 114         - sama5d44 (device superset)
 115
 116           * Datasheet
 117
 118           http://ww1.microchip.com/downloads/en/DeviceDoc/60001525A.pdf
 119
 120       - sama5d2 family
 121
 122         - sama5d21
 123         - sama5d22
 124         - sama5d23
 125         - sama5d24
 126         - sama5d26
 127         - sama5d27 (device superset)
 128         - sama5d28 (device superset + environmental monitors)
 129
 130           * Datasheet
 131
 132           http://ww1.microchip.com/downloads/en/DeviceDoc/DS60001476B.pdf
 133
 134     * ARM Cortex-M7 MCUs
 135       - sams70 family
 136
 137         - sams70j19
 138         - sams70j20
 139         - sams70j21
 140         - sams70n19
 141         - sams70n20
 142         - sams70n21
 143         - sams70q19
 144         - sams70q20
 145         - sams70q21
 146
 147       - samv70 family
 148
 149         - samv70j19
 150         - samv70j20
 151         - samv70n19
 152         - samv70n20
 153         - samv70q19
 154         - samv70q20
 155
 156       - samv71 family
 157
 158         - samv71j19
 159         - samv71j20
 160         - samv71j21
 161         - samv71n19
 162         - samv71n20
 163         - samv71n21
 164         - samv71q19
 165         - samv71q20
 166         - samv71q21
 167
 168           * Datasheet
 169
 170           http://ww1.microchip.com/downloads/en/DeviceDoc/60001527A.pdf
 171
 172
 173 Linux kernel information
 174 ------------------------
 175 Linux kernel mach directory: arch/arm/mach-at91
 176 MAINTAINERS entry is: "ARM/Microchip (AT91) SoC support"
 177
 178
 179 Device Tree for AT91 SoCs and boards
 180 ------------------------------------
 181 All AT91 SoCs are converted to Device Tree. Since Linux 3.19, these products
 182 must use this method to boot the Linux kernel.
 183
 184 Work In Progress statement:
 185 Device Tree files and Device Tree bindings that apply to AT91 SoCs and boards are
 186 considered as "Unstable". To be completely clear, any at91 binding can change at
 187 any time. So, be sure to use a Device Tree Binary and a Kernel Image generated from
 188 the same source tree.
 189 Please refer to the Documentation/devicetree/bindings/ABI.txt file for a
 190 definition of a "Stable" binding/ABI.
 191 This statement will be removed by AT91 MAINTAINERS when appropriate.
 192
 193 Naming conventions and best practice:
 194
 195 - SoCs Device Tree Source Include files are named after the official name of
 196   the product (at91sam9g20.dtsi or sama5d33.dtsi for instance).
 197 - Device Tree Source Include files (.dtsi) are used to collect common nodes that can be
 198   shared across SoCs or boards (sama5d3.dtsi or at91sam9x5cm.dtsi for instance).
 199   When collecting nodes for a particular peripheral or topic, the identifier have to
 200   be placed at the end of the file name, separated with a "_" (at91sam9x5_can.dtsi
 201   or sama5d3_gmac.dtsi for example).
 202 - board Device Tree Source files (.dts) are prefixed by the string "at91-" so
 203   that they can be identified easily. Note that some files are historical exceptions
 204   to this rule (sama5d3[13456]ek.dts, usb_a9g20.dts or animeo_ip.dts for example).