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210 lines
6.0 KiB
210 lines
6.0 KiB
============================= |
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ARM Microchip SoCs (aka AT91) |
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============================= |
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Introduction |
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------------ |
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This document gives useful information about the ARM Microchip SoCs that are |
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currently supported in Linux Mainline (you know, the one on kernel.org). |
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It is important to note that the Microchip (previously Atmel) ARM-based MPU |
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product line is historically named "AT91" or "at91" throughout the Linux kernel |
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development process even if this product prefix has completely disappeared from |
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the official Microchip product name. Anyway, files, directories, git trees, |
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git branches/tags and email subject always contain this "at91" sub-string. |
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AT91 SoCs |
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--------- |
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Documentation and detailed datasheet for each product are available on |
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the Microchip website: http://www.microchip.com. |
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Flavors: |
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* ARM 920 based SoC |
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- at91rm9200 |
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* Datasheet |
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http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-1768-32-bit-ARM920T-Embedded-Microprocessor-AT91RM9200_Datasheet.pdf |
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* ARM 926 based SoCs |
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- at91sam9260 |
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* Datasheet |
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http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-6221-32-bit-ARM926EJ-S-Embedded-Microprocessor-SAM9260_Datasheet.pdf |
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- at91sam9xe |
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* Datasheet |
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http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-6254-32-bit-ARM926EJ-S-Embedded-Microprocessor-SAM9XE_Datasheet.pdf |
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- at91sam9261 |
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* Datasheet |
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http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-6062-ARM926EJ-S-Microprocessor-SAM9261_Datasheet.pdf |
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- at91sam9263 |
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* Datasheet |
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http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-6249-32-bit-ARM926EJ-S-Embedded-Microprocessor-SAM9263_Datasheet.pdf |
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- at91sam9rl |
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* Datasheet |
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http://ww1.microchip.com/downloads/en/DeviceDoc/doc6289.pdf |
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- at91sam9g20 |
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* Datasheet |
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http://ww1.microchip.com/downloads/en/DeviceDoc/DS60001516A.pdf |
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- at91sam9g45 family |
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- at91sam9g45 |
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- at91sam9g46 |
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- at91sam9m10 |
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- at91sam9m11 (device superset) |
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* Datasheet |
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http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-6437-32-bit-ARM926-Embedded-Microprocessor-SAM9M11_Datasheet.pdf |
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- at91sam9x5 family (aka "The 5 series") |
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- at91sam9g15 |
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- at91sam9g25 |
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- at91sam9g35 |
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- at91sam9x25 |
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- at91sam9x35 |
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* Datasheet (can be considered as covering the whole family) |
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http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-11055-32-bit-ARM926EJ-S-Microcontroller-SAM9X35_Datasheet.pdf |
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- at91sam9n12 |
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* Datasheet |
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http://ww1.microchip.com/downloads/en/DeviceDoc/DS60001517A.pdf |
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- sam9x60 |
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* Datasheet |
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http://ww1.microchip.com/downloads/en/DeviceDoc/SAM9X60-Data-Sheet-DS60001579A.pdf |
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* ARM Cortex-A5 based SoCs |
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- sama5d3 family |
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- sama5d31 |
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- sama5d33 |
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- sama5d34 |
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- sama5d35 |
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- sama5d36 (device superset) |
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* Datasheet |
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http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-11121-32-bit-Cortex-A5-Microcontroller-SAMA5D3_Datasheet_B.pdf |
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* ARM Cortex-A5 + NEON based SoCs |
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- sama5d4 family |
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- sama5d41 |
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- sama5d42 |
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- sama5d43 |
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- sama5d44 (device superset) |
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* Datasheet |
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http://ww1.microchip.com/downloads/en/DeviceDoc/60001525A.pdf |
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- sama5d2 family |
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- sama5d21 |
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- sama5d22 |
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- sama5d23 |
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- sama5d24 |
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- sama5d26 |
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- sama5d27 (device superset) |
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- sama5d28 (device superset + environmental monitors) |
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* Datasheet |
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http://ww1.microchip.com/downloads/en/DeviceDoc/DS60001476B.pdf |
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* ARM Cortex-M7 MCUs |
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- sams70 family |
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- sams70j19 |
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- sams70j20 |
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- sams70j21 |
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- sams70n19 |
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- sams70n20 |
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- sams70n21 |
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- sams70q19 |
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- sams70q20 |
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- sams70q21 |
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- samv70 family |
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- samv70j19 |
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- samv70j20 |
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- samv70n19 |
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- samv70n20 |
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- samv70q19 |
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- samv70q20 |
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- samv71 family |
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- samv71j19 |
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- samv71j20 |
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- samv71j21 |
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- samv71n19 |
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- samv71n20 |
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- samv71n21 |
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- samv71q19 |
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- samv71q20 |
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- samv71q21 |
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* Datasheet |
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http://ww1.microchip.com/downloads/en/DeviceDoc/SAM-E70-S70-V70-V71-Family-Data-Sheet-DS60001527D.pdf |
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Linux kernel information |
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------------------------ |
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Linux kernel mach directory: arch/arm/mach-at91 |
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MAINTAINERS entry is: "ARM/Microchip (AT91) SoC support" |
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Device Tree for AT91 SoCs and boards |
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------------------------------------ |
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All AT91 SoCs are converted to Device Tree. Since Linux 3.19, these products |
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must use this method to boot the Linux kernel. |
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Work In Progress statement: |
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Device Tree files and Device Tree bindings that apply to AT91 SoCs and boards are |
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considered as "Unstable". To be completely clear, any at91 binding can change at |
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any time. So, be sure to use a Device Tree Binary and a Kernel Image generated from |
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the same source tree. |
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Please refer to the Documentation/devicetree/bindings/ABI.rst file for a |
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definition of a "Stable" binding/ABI. |
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This statement will be removed by AT91 MAINTAINERS when appropriate. |
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Naming conventions and best practice: |
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- SoCs Device Tree Source Include files are named after the official name of |
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the product (at91sam9g20.dtsi or sama5d33.dtsi for instance). |
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- Device Tree Source Include files (.dtsi) are used to collect common nodes that can be |
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shared across SoCs or boards (sama5d3.dtsi or at91sam9x5cm.dtsi for instance). |
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When collecting nodes for a particular peripheral or topic, the identifier have to |
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be placed at the end of the file name, separated with a "_" (at91sam9x5_can.dtsi |
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or sama5d3_gmac.dtsi for example). |
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- board Device Tree Source files (.dts) are prefixed by the string "at91-" so |
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that they can be identified easily. Note that some files are historical exceptions |
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to this rule (sama5d3[13456]ek.dts, usb_a9g20.dts or animeo_ip.dts for example).
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