diff options
| author | Shawn Guo <shawn.guo@linaro.org> | 2012-09-05 01:09:12 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rjw@sisk.pl> | 2012-09-09 22:06:33 +0200 |
| commit | b496dfbc94ab86f970ef0167eaabe51f930aa5fb (patch) | |
| tree | 3ce7bdb6847fbcff3f46935ebc5b5c17da23d31d /Documentation | |
| parent | ARM: add cpufreq transiton notifier to adjust loops_per_jiffy for smp (diff) | |
| download | linux-b496dfbc94ab86f970ef0167eaabe51f930aa5fb.tar.xz linux-b496dfbc94ab86f970ef0167eaabe51f930aa5fb.zip | |
PM / OPP: Initialize OPP table from device tree
With a lot of devices booting from device tree nowadays, it requires
that OPP table can be initialized from device tree. The patch adds
a helper function of_init_opp_table together with a binding doc for
that purpose.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/power/opp.txt | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/power/opp.txt b/Documentation/devicetree/bindings/power/opp.txt new file mode 100644 index 000000000000..74499e5033fc --- /dev/null +++ b/Documentation/devicetree/bindings/power/opp.txt @@ -0,0 +1,25 @@ +* Generic OPP Interface + +SoCs have a standard set of tuples consisting of frequency and +voltage pairs that the device will support per voltage domain. These +are called Operating Performance Points or OPPs. + +Properties: +- operating-points: An array of 2-tuples items, and each item consists + of frequency and voltage like <freq-kHz vol-uV>. + freq: clock frequency in kHz + vol: voltage in microvolt + +Examples: + +cpu@0 { + compatible = "arm,cortex-a9"; + reg = <0>; + next-level-cache = <&L2>; + operating-points = < + /* kHz uV */ + 792000 1100000 + 396000 950000 + 198000 850000 + >; +}; |