Re: [PATCH v3 1/2] fsl: Add binding for RCPM
From: Shawn Guo <hidden>
Date: 2015-09-24 12:29:17
On Thu, Sep 24, 2015 at 04:29:13PM +0800, Dongsheng Wang wrote:
quoted hunk
From: Wang Dongsheng <redacted> 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 <redacted> Signed-off-by: Tang Yuantian <redacted> Signed-off-by: Wang Dongsheng <redacted> --- *v3* - Add "fsl,#rcpm-wakeup-cells" for rcpm node. The number of cells correspond rcpm-wakeup property. - Modify rcpm-wakeup property description. *v2* - Remove P4080 example. - Modify rcpm-wakeup property description.diff --git a/Documentation/devicetree/bindings/soc/fsl/rcpm.txt b/Documentation/devicetree/bindings/soc/fsl/rcpm.txt new file mode 100644 index 0000000..52110ec --- /dev/null +++ b/Documentation/devicetree/bindings/soc/fsl/rcpm.txt@@ -0,0 +1,63 @@ +* 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. + - fsl,#rcpm-wakeup-cells : The number of cells in rcpm-wakeup property. + - 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>; + fsl,#rcpm-wakeup-cells = <2>; + }; + +* 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: The value of the property consists of cells, the number of
Shouldn't this vendor specific property be prefixed with 'fsl,' as well?
+ cells defined in "fsl,#rcpm-wakeup-cells". The first cell is a pointer + to the rcpm node, the second cell is the bit mask that should be set + in IPPDEXPCR0, and the third cell is for IPPDEXPCR1, and so on.
I guess that IPPDEXPCR0 and IPPDEXPCR1 need some documentation too, or a pointer to hardware documents containing more detailed info about them. Shawn
+
+Example:
+ lpuart0: serial@2950000 {
+ compatible = "fsl,ls1021a-lpuart";
+ reg = <0x0 0x2950000 0x0 0x1000>;
+ interrupts = <GIC_SPI 80 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&sysclk>;
+ clock-names = "ipg";
+ rcpm-wakeup = <&rcpm 0x0 0x40000000>;
+ status = "disabled";
+ };
--
2.1.0.27.g96db324
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