Re: [PATCH v3 3/4] thermal/core: Build ascending ordered indexes for the trip points

[Daniel Lezcano <daniel.lezcano@linaro.org>]

On 18/07/2022 07:28, Zhang Rui wrote:
> On Fri, 2022-07-15 at 23:09 +0200, Daniel Lezcano wrote:
>> By convention the trips points are declared in the ascending
>> temperature order. However, no specification for the device tree,
>> ACPI
>> or documentation tells the trip points must be ordered this way.
>>
>> In the other hand, we need those to be ordered to browse them at the
>> thermal events. But if we assume they are ordered and change the code
>> based on this assumption, any platform with shuffled trip points
>> description will be broken (if they exist).
>>
>> Instead of taking the risk of breaking the existing platforms, use an
>> array of temperature ordered trip identifiers and make it available
>> for the code needing to browse the trip points in an ordered way.
>>
>> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

[ ... ]

>> +static void sort_trips_indexes(struct thermal_zone_device *tz)
>> +{
>> +       int i, j;
>> +
>> +       for (i = 0; i < tz->trips; i++)
>> +               tz->trips_indexes[i] = i;
>> +
>> +       for (i = 0; i < tz->trips; i++) {
>> +               for (j = i + 1; j < tz->trips; j++) {
>> +                       int t1, t2;
>> +
>> +                       tz->ops->get_trip_temp(tz, tz-
>>> trips_indexes[i], &t1);
> 
> This line can be moved to the upper loop.
> 
>> +                       tz->ops->get_trip_temp(tz, tz-
>>> trips_indexes[j], &t2);


Actually, we can not move the line up because of the swap below

>> +                       if (t1 > t2)
>> +                               swap(tz->trips_indexes[i], tz-
>>> trips_indexes[j]);
>> +               }
>> +       }
>> +}




-- 
<http://www.linaro.org/> Linaro.org │ Open source software for ARM SoCs

Follow Linaro:  <http://www.facebook.com/pages/Linaro> Facebook |
<http://twitter.com/#!/linaroorg> Twitter |
<http://www.linaro.org/linaro-blog/> Blog