On Wed, 2015-09-09 at 14:42 +0800, Dongsheng Wang wrote:
> From: Wang Dongsheng <dongsheng.wang@xxxxxxxxxxxxx>
>
> RCPM is the Run Control and Power Management module performs all
> device-level tasks associated with device run control and power
> management.
>
> Add this for freescale powerpc platform and layerscape platform.
>
> Signed-off-by: Chenhui Zhao <chenhui.zhao@xxxxxxxxxxxxx>
> Signed-off-by: Tang Yuantian <Yuantian.Tang@xxxxxxxxxxxxx>
> Signed-off-by: Wang Dongsheng <dongsheng.wang@xxxxxxxxxxxxx>
>
> diff --git a/Documentation/devicetree/bindings/soc/fsl/rcpm.txt
> b/Documentation/devicetree/bindings/soc/fsl/rcpm.txt
> new file mode 100644
> index 0000000..284070c
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/soc/fsl/rcpm.txt
> @@ -0,0 +1,64 @@
> +* Run Control and Power Management
> +-------------------------------------------
> +The RCPM performs all device-level tasks associated with device run control
> +and power management.
> +
> +Required properites:
> + - reg : Offset and length of the register set of RCPM block.
> + - compatible : Sould contain a chip-specific RCPM block compatible string
> + and (if applicable) may contain a chassis-version RCPM compatible string.
> + Chip-specific strings are of the form "fsl,<chip>-rcpm", such as:
> + * "fsl,p2041-rcpm"
> + * "fsl,p3041-rcpm"
> + * "fsl,p4080-rcpm"
> + * "fsl,p5020-rcpm"
> + * "fsl,p5040-rcpm"
> + * "fsl,t4240-rcpm"
> + * "fsl,b4420-rcpm"
> + * "fsl,b4860-rcpm"
> +
> + Chassis-version strings are of the form "fsl,qoriq-rcpm-<version>",
> + such as:
> + * "fsl,qoriq-rcpm-1.0": for chassis 1.0 rcpm
> + * "fsl,qoriq-rcpm-2.0": for chassis 2.0 rcpm
> + * "fsl,qoriq-rcpm-2.1": for chassis 2.1 rcpm
> +
> +All references to "1.0" and "2.0" refer to the QorIQ chassis version to
> +which the chip complies.
> +Chassis Version Example Chips
> +--------------- -------------------------------
> +1.0 p4080, p5020, p5040, p2041, p3041
> +2.0 t4240, b4860, b4420
> +2.1 t1040, ls1021
> +
> +Example:
> +The RCPM node for T4240:
> + rcpm: global-utilities@e2000{
> + compatible = "fsl,t4240-rcpm", "fsl,qoriq-rcpm-2.0";
> + reg = <0xe2000 0x1000>;
> + };
> +
> +The RCPM node for P4080:
> + rcpm: global-utilities@e2000{
> + compatible = "fsl,qoriq-rcpm-1.0";
> + reg = <0xe2000 0x1000>;
> + };
I would avoid putting the p4080 example in the binding, as we don't want to
make it look like it's OK to leave out the specific chip compatible.
> +* Freescale RCPM Wakeup Source Device Tree Bindings
> +-------------------------------------------
> +Required rcpm-wakeup property should be added to a device node if the
> device
> +can be used as a wakeup source.
> +
> + - rcpm-wakeup: should contain a pointer to the rcpm node and the
> + corresponding bit of device in the register.
The corresponding bit in *what* register?
-Scott
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