Re: [PATCH v4 2/2] dt: power: st: Provide bindings for ST's OPPs
From: Rob Herring <hidden>
Date: 2015-07-28 13:55:58
Also in:
linux-arm-kernel, linux-devicetree, lkml
On Mon, Jul 27, 2015 at 10:20 AM, Lee Jones [off-list ref] wrote:
quoted hunk ↗ jump to hunk
These OPPs are used in ST's CPUFreq implementation. Signed-off-by: Lee Jones <redacted> --- Changelog: - None, new patch Documentation/devicetree/bindings/power/opp-st.txt | 76 ++++++++++++++++++++++ 1 file changed, 76 insertions(+) create mode 100644 Documentation/devicetree/bindings/power/opp-st.txtdiff --git a/Documentation/devicetree/bindings/power/opp-st.txt b/Documentation/devicetree/bindings/power/opp-st.txt new file mode 100644 index 0000000..6eb2a91 --- /dev/null +++ b/Documentation/devicetree/bindings/power/opp-st.txt@@ -0,0 +1,76 @@ +STMicroelectronics OPP (Operating Performance Points) Bindings +-------------------------------------------------------------- + +Frequency Scaling only +---------------------- + +Located in CPU's node: + +- operating-points : [See: ./opp.txt] + +Example [safe] +-------------- + +cpus { + cpu@0 { + /* kHz uV */ + operating-points = <1500000 0 + 1200000 0 + 800000 0 + 500000 0>; + }; +}; + +Dynamic Voltage and Frequency Scaling (DVFS) +-------------------------------------------- + +Located in 'cpu0-opp-list' node [to be provided ONLY by the bootloader]: + +- compatible : Should be "operating-points-v2-sti" +- opp{1..N} : Each 'oppX' subnode will contain the following properties: + - opp-hz : CPU frequency [Hz] for this OPP [See: ./opp.txt] + - st,avs : List of available voltages [uV] indexed by process code
Add a unit suffix (-microvolt).
+ - st,cuts : Cut version this OPP is suitable for [0xFF means ALL] + - st,substrate : Substrate version this OPP is suitable for [0xFF means ALL]
How about not present means all?
+- st,syscfg : Phandle to Major number register + First cell: offset to major number +- st,syscfg-eng : Phandle to Minor number and Pcode registers + First cell: offset to process code + Second cell: offset to minor number
Would the proposed nvmem binding work for this? Rob -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html