On Thu, Oct 6, 2016 at 10:06 AM, Geert Uytterhoeven
<geert@xxxxxxxxxxxxxx> wrote:
> On Wed, Oct 5, 2016 at 10:31 PM, Lina Iyer <lina.iyer@xxxxxxxxxx> wrote:
>> Update DT bindings to describe idle states of PM domains.
>>
>> This patch is based on the original patch by Marc Titinger.
>>
>> Cc: <devicetree@xxxxxxxxxxxxxxx>
>> Signed-off-by: Marc Titinger <mtitinger+renesas@xxxxxxxxxxxx>
>> Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
>> Signed-off-by: Lina Iyer <lina.iyer@xxxxxxxxxx>
>> Acked-by: Rob Herring <robh@xxxxxxxxxx>
>> ---
>> .../devicetree/bindings/power/power_domain.txt | 36 ++++++++++++++++++++++
>> 1 file changed, 36 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/power/power_domain.txt b/Documentation/devicetree/bindings/power/power_domain.txt
>> index 025b5e7..a043315 100644
>> --- a/Documentation/devicetree/bindings/power/power_domain.txt
>> +++ b/Documentation/devicetree/bindings/power/power_domain.txt
>> @@ -29,6 +29,10 @@ Optional properties:
>> specified by this binding. More details about power domain specifier are
>> available in the next section.
>>
>> +- domain-idle-states : A phandle of an idle-state that shall be soaked into a
>> + generic domain power state. The idle state definitions are
>> + compatible with arm,idle-state specified in [1].
>> +
>> Example:
>>
>> power: power-controller@12340000 {
>> @@ -59,6 +63,36 @@ The nodes above define two power controllers: 'parent' and 'child'.
>> Domains created by the 'child' power controller are subdomains of '0' power
>> domain provided by the 'parent' power controller.
>>
>> +Example 3:
>> + parent: power-controller@12340000 {
>
> With W=1, this is gonna trigger:
>
> Warning (unit_address_vs_reg): Node foo has a unit name, but no reg property
>
> Yes, there are pre-existing users in this file.
Scrap this... switching desktops causes loss of position...
>> + compatible = "foo,power-controller";
>> + reg = <0x12340000 0x1000>;
>> + #power-domain-cells = <1>;
>> + domain-idle-states = <&DOMAIN_RET, &DOMAIN_PWR_DN>;
>> + };
+ DOMAIN_RET: state@0 {
+ compatible = "arm,idle-state";
+ entry-latency-us = <1000>;
+ exit-latency-us = <2000>;
+ min-residency-us = <10000>;
This one is gonna trigger
Warning (unit_address_vs_reg): Node foo has a unit name, but no reg property
+ };
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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