[PATCH linux-next v5 01/13] dt-bindings: Add a document of PECI subsystem
DORMANTno replies
REVIEWED: 3 (0M)
From: Jae Hyun Yoo <hidden>
Date: 2018-06-01 18:21:11
Also in:
lkml, openbmc
Subsystem:
open firmware and flattened device tree bindings, peci subsystem, the rest · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Iwona Winiarska, Linus Torvalds
3 review trailers.
This commit adds a document of generic PECI bus, adapter and client driver. Signed-off-by: Jae Hyun Yoo <redacted> Reviewed-by: Haiyue Wang <redacted> Reviewed-by: James Feist <redacted> Reviewed-by: Vernon Mauery <redacted> Cc: Andrew Jeffery <redacted> 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..8db2b1e56a01
--- /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 > + + peci-client@30 { + compatible = "intel,peci-client"; + reg = <0x30>; + }; + + peci-client@31 { + compatible = "intel,peci-client"; + reg = <0x31>; + }; + };
--
2.17.0