cpm.txt

Version: - FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10

    1 PPC4xx Clock Power Management (CPM) node
    2 
    3 Required properties:
    4         - compatible            : compatible list, currently only "ibm,cpm"
    5         - dcr-access-method     : "native"
    6         - dcr-reg               : < DCR register range >
    7 
    8 Optional properties:
    9         - er-offset             : All 4xx SoCs with a CPM controller have
   10                                   one of two different order for the CPM
   11                                   registers. Some have the CPM registers
   12                                   in the following order (ER,FR,SR). The
   13                                   others have them in the following order
   14                                   (SR,ER,FR). For the second case set
   15                                   er-offset = <1>.
   16         - unused-units          : specifier consist of one cell. For each
   17                                   bit in the cell, the corresponding bit
   18                                   in CPM will be set to turn off unused
   19                                   devices.
   20         - idle-doze             : specifier consist of one cell. For each
   21                                   bit in the cell, the corresponding bit
   22                                   in CPM will be set to turn off unused
   23                                   devices. This is usually just CPM[CPU].
   24         - standby               : specifier consist of one cell. For each
   25                                   bit in the cell, the corresponding bit
   26                                   in CPM will be set on standby and
   27                                   restored on resume.
   28         - suspend               : specifier consist of one cell. For each
   29                                   bit in the cell, the corresponding bit
   30                                   in CPM will be set on suspend (mem) and
   31                                   restored on resume. Note, for standby
   32                                   and suspend the corresponding bits can
   33                                   be different or the same. Usually for
   34                                   standby only class 2 and 3 units are set.
   35                                   However, the interface does not care.
   36                                   If they are the same, the additional
   37                                   power saving will be seeing if support
   38                                   is available to put the DDR in self
   39                                   refresh mode and any additional power
   40                                   saving techniques for the specific SoC.
   41 
   42 Example:
   43         CPM0: cpm {
   44                 compatible = "ibm,cpm";
   45                 dcr-access-method = "native";
   46                 dcr-reg = <0x160 0x003>;
   47                 er-offset = <0>;
   48                 unused-units = <0x00000100>;
   49                 idle-doze = <0x02000000>;
   50                 standby = <0xfeff0000>;
   51                 suspend = <0xfeff791d>;
   52 };

Cache object: e567829a4932ea001b106440007bbd71

[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.

FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/powerpc/4xx/cpm.txt

FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/powerpc/4xx/cpm.txt