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Diffstat (limited to 'doc/device-tree/ibm,opal/power-mgt/occ.rst')
| -rw-r--r-- | doc/device-tree/ibm,opal/power-mgt/occ.rst | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/doc/device-tree/ibm,opal/power-mgt/occ.rst b/doc/device-tree/ibm,opal/power-mgt/occ.rst new file mode 100644 index 0000000..ba04f05 --- /dev/null +++ b/doc/device-tree/ibm,opal/power-mgt/occ.rst @@ -0,0 +1,38 @@ +ibm,opal/power-mgt/occ device tree entries +========================================== + +This node exports the per-chip pstate table properties to kernel. + +Example: + +.. code-block:: dts + +occ@7ffddf8000 { + ibm,pstate-vdds = [45 45 46 46 46 47 48 49 4a 4b 4c 4d 4f 50 51 52 53 54 55 57 58 59 5a 5b 5c 5d 5e 5f 5f 60 61 62 63 64 65 65 66 67 68 69 6a 6a 6b 6c 6d 6e 6f 70 70 71]; + ibm,chip-id = <0x1>; + phandle = <0x100003b8>; + ibm,pstate-vcss = [3b 3d 3f 41 42 44 45 46 47 48 49 4a 4b 4c 4d 4e 4f 50 50 51 52 53 54 55 56 56 57 57 58 58 59 59 5a 5a 5b 5b 5c 5c 5d 5d 5e 5e 5f 5f 60 60 61 61 62 62]; + reg = <0x7f 0xfddf8000 0xb98>; +}; + +ibm,chip-id +----------- + +This property denotes the ID of chip to which OCC belongs to. + +reg +--- + +This tuple gives the statring address of the OPAL data in HOMER and +the size of the OPAL data. + +The top-level /ibm,opal/power-mgt contains : + #size-cells = <1> + #address-cells = <2> + +ibm,pstate-vcss ibm,pstate-vdds +------------------------------- + +These properties list a voltage-identifier of each of the pstates listed in +ibm,pstate-ids for the Vcs and Vdd values used for that pstate in that chip. +Each VID is a single byte. |