Messages in this thread Patch in this message | | | From | Jae Hyun Yoo <> | Subject | [v4 01/11] dt-bindings: Add a document of PECI subsystem | Date | Mon, 21 May 2018 12:57:51 -0700 |
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This commit adds a document of generic PECI bus, adapter and client driver.
Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com> Reviewed-by: Haiyue Wang <haiyue.wang@linux.intel.com> Reviewed-by: James Feist <james.feist@linux.intel.com> Reviewed-by: Vernon Mauery <vernon.mauery@linux.intel.com> Cc: Andrew Jeffery <andrew@aj.id.au> Cc: Joel Stanley <joel@jms.id.au> --- .../devicetree/bindings/peci/peci.txt | 59 +++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 Documentation/devicetree/bindings/peci/peci.txt
diff --git a/Documentation/devicetree/bindings/peci/peci.txt b/Documentation/devicetree/bindings/peci/peci.txt new file mode 100644 index 000000000000..72fc8ddd6a55 --- /dev/null +++ b/Documentation/devicetree/bindings/peci/peci.txt @@ -0,0 +1,59 @@ +Generic device tree configuration for PECI buses +================================================ + +Required properties: +- compatible : Should be "simple-bus". +- #address-cells : Should be present if the device has sub-nodes. +- #size-cells : Should be present if the device has sub-nodes. +- ranges : Should contain PECI controller registers ranges. + +Example: + peci: peci@10000000 { + compatible = "simple-bus"; + #address-cells = <1>; + #size-cells = <1>; + ranges = <0x0 0x10000000 0x1000>; + }; + +Generic device tree configuration for PECI adapters +=================================================== + +Required properties: +- #address-cells : Should be <1>. Read more about client addresses below. +- #size-cells : Should be <0>. Read more about client addresses below. + +The cells properties above define that an address of CPU clients of a PECI bus +are described by a single value. + +Example: + peci0: peci-bus@0 { + compatible = "soc,soc-peci"; + reg = <0x0 0x1000>; + #address-cells = <1>; + #size-cells = <0>; + }; + +Generic device tree configuration for PECI clients +================================================== + +Required properties: +- compatible : Should contain name of PECI client. +- reg : Should contain address of a client CPU. Address range of CPU + clients is starting from 0x30 based on PECI specification. + +Example: + peci-bus@0 { + #address-cells = <1>; + #size-cells = <0>; + < more properties > + + function@30 { + compatible = "device,function"; + reg = <0x30>; + }; + + function@31 { + compatible = "device,function"; + reg = <0x31>; + }; + }; -- 2.17.0
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