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-rw-r--r--Documentation/arm/Atmel/README124
-rw-r--r--Documentation/arm/Samsung-S3C24XX/DMA.txt46
2 files changed, 124 insertions, 46 deletions
diff --git a/Documentation/arm/Atmel/README b/Documentation/arm/Atmel/README
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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 detailled 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
+
+
+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).
diff --git a/Documentation/arm/Samsung-S3C24XX/DMA.txt b/Documentation/arm/Samsung-S3C24XX/DMA.txt
deleted file mode 100644
index 3ed82383efea..000000000000
--- a/Documentation/arm/Samsung-S3C24XX/DMA.txt
+++ /dev/null
@@ -1,46 +0,0 @@
- S3C2410 DMA
- ===========
-
-Introduction
-------------
-
- The kernel provides an interface to manage DMA transfers
- using the DMA channels in the CPU, so that the central
- duty of managing channel mappings, and programming the
- channel generators is in one place.
-
-
-DMA Channel Ordering
---------------------
-
- Many of the range do not have connections for the DMA
- channels to all sources, which means that some devices
- have a restricted number of channels that can be used.
-
- To allow flexibility for each CPU type and board, the
- DMA code can be given a DMA ordering structure which
- allows the order of channel search to be specified, as
- well as allowing the prohibition of certain claims.
-
- struct s3c24xx_dma_order has a list of channels, and
- each channel within has a slot for a list of DMA
- channel numbers. The slots are searched in order for
- the presence of a DMA channel number with DMA_CH_VALID
- or-ed in.
-
- If the order has the flag DMA_CH_NEVER set, then after
- checking the channel list, the system will return no
- found channel, thus denying the request.
-
- A board support file can call s3c24xx_dma_order_set()
- to register a complete ordering set. The routine will
- copy the data, so the original can be discarded with
- __initdata.
-
-
-Authour
--------
-
-Ben Dooks,
-Copyright (c) 2007 Ben Dooks, Simtec Electronics
-Licensed under the GPL v2

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