rcpm.txt

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    1 * Run Control and Power Management
    2 -------------------------------------------
    3 The RCPM performs all device-level tasks associated with device run control
    4 and power management.
    5 
    6 Required properites:
    7   - reg : Offset and length of the register set of the RCPM block.
    8   - #fsl,rcpm-wakeup-cells : The number of IPPDEXPCR register cells in the
    9         fsl,rcpm-wakeup property.
   10   - compatible : Must contain a chip-specific RCPM block compatible string
   11         and (if applicable) may contain a chassis-version RCPM compatible
   12         string. Chip-specific strings are of the form "fsl,<chip>-rcpm",
   13         such as:
   14         * "fsl,p2041-rcpm"
   15         * "fsl,p5020-rcpm"
   16         * "fsl,t4240-rcpm"
   17 
   18         Chassis-version strings are of the form "fsl,qoriq-rcpm-<version>",
   19         such as:
   20         * "fsl,qoriq-rcpm-1.0": for chassis 1.0 rcpm
   21         * "fsl,qoriq-rcpm-2.0": for chassis 2.0 rcpm
   22         * "fsl,qoriq-rcpm-2.1": for chassis 2.1 rcpm
   23         * "fsl,qoriq-rcpm-2.1+": for chassis 2.1+ rcpm
   24 
   25 All references to "1.0" and "2.0" refer to the QorIQ chassis version to
   26 which the chip complies.
   27 Chassis Version         Example Chips
   28 ---------------         -------------------------------
   29 1.0                             p4080, p5020, p5040, p2041, p3041
   30 2.0                             t4240, b4860, b4420
   31 2.1                             t1040,
   32 2.1+                            ls1021a, ls1012a, ls1043a, ls1046a
   33 
   34 Optional properties:
   35  - little-endian : RCPM register block is Little Endian. Without it RCPM
   36    will be Big Endian (default case).
   37 
   38 Example:
   39 The RCPM node for T4240:
   40         rcpm: global-utilities@e2000 {
   41                 compatible = "fsl,t4240-rcpm", "fsl,qoriq-rcpm-2.0";
   42                 reg = <0xe2000 0x1000>;
   43                 #fsl,rcpm-wakeup-cells = <2>;
   44         };
   45 
   46 * Freescale RCPM Wakeup Source Device Tree Bindings
   47 -------------------------------------------
   48 Required fsl,rcpm-wakeup property should be added to a device node if the device
   49 can be used as a wakeup source.
   50 
   51   - fsl,rcpm-wakeup: Consists of a phandle to the rcpm node and the IPPDEXPCR
   52         register cells. The number of IPPDEXPCR register cells is defined in
   53         "#fsl,rcpm-wakeup-cells" in the rcpm node. The first register cell is
   54         the bit mask that should be set in IPPDEXPCR0, and the second register
   55         cell is for IPPDEXPCR1, and so on.
   56 
   57         Note: IPPDEXPCR(IP Powerdown Exception Control Register) provides a
   58         mechanism for keeping certain blocks awake during STANDBY and MEM, in
   59         order to use them as wake-up sources.
   60 
   61 Example:
   62         lpuart0: serial@2950000 {
   63                 compatible = "fsl,ls1021a-lpuart";
   64                 reg = <0x0 0x2950000 0x0 0x1000>;
   65                 interrupts = <GIC_SPI 80 IRQ_TYPE_LEVEL_HIGH>;
   66                 clocks = <&sysclk>;
   67                 clock-names = "ipg";
   68                 fsl,rcpm-wakeup = <&rcpm 0x0 0x40000000>;
   69         };

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/soc/fsl/rcpm.txt

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sys/contrib/device-tree/Bindings/soc/fsl/rcpm.txt