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Commit aee2828c authored by Martin Blumenstingl's avatar Martin Blumenstingl Committed by Kevin Hilman
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dt-bindings: Amlogic: add documentation for the SoC info register areas 



There are three register areas which contain information about the SoC
version and revision:
- the assist registers contain the SoC's "major version" which encodes
  the SoC generation and part number. this is available on Meson6,
  Meson8 and Meson8b SoCs.
- the bootrom register contains at least the SoCs "misc version". this
  is avilable on Meson6, Meson8 and Meson8b
- the analog top registers contain information about the SoC revision.
  this is only available on Meson8 and Meson8b

Not much else is currently known about these registers.

Signed-off-by: default avatarMartin Blumenstingl <martin.blumenstingl@googlemail.com>
Acked-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarKevin Hilman <khilman@baylibre.com>
parent 291f45dd

Documentation/devicetree/bindings/arm/amlogic/analog-top.txt

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Amlogic Meson8 and Meson8b "analog top" registers:

--------------------------------------------------



The analog top registers contain information about the so-called

"metal revision" (which encodes the "minor version") of the SoC.



Required properties:

- reg: the register range of the analog top registers

- compatible: depending on the SoC this should be one of:

		- "amlogic,meson8-analog-top"

		- "amlogic,meson8b-analog-top"

		along with "syscon"





Example:



	analog_top: analog-top@81a8 {

		compatible = "amlogic,meson8-analog-top", "syscon";

		reg = <0x81a8 0x14>;

	};

Documentation/devicetree/bindings/arm/amlogic/assist.txt

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Amlogic Meson6/Meson8/Meson8b assist registers:

-----------------------------------------------



The assist registers contain basic information about the SoC,

for example the encoded SoC part number.



Required properties:

- reg: the register range of the assist registers

- compatible: should be "amlogic,meson-mx-assist" along with "syscon"





Example:



	assist: assist@7c00 {

		compatible = "amlogic,meson-mx-assist", "syscon";

		reg = <0x7c00 0x200>;

	};

Documentation/devicetree/bindings/arm/amlogic/bootrom.txt

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Amlogic Meson6/Meson8/Meson8b bootrom:

--------------------------------------



The bootrom register area can be used to access SoC specific

information, such as the "misc version".



Required properties:

- reg: the register range of the bootrom registers

- compatible: should be "amlogic,meson-mx-bootrom" along with "syscon"





Example:



	bootrom: bootrom@d9040000 {

		compatible = "amlogic,meson-mx-bootrom", "syscon";

		reg = <0xd9040000 0x10000>;

	};