Re: [PATCH] thermal/drivers/armada: Use the thermal_zone_get_crit_temp()

Daniel Lezcano
2023-01-24T11:36:33Z

On 24/01/2023 12:04, Miquel Raynal wrote:
> Hi Daniel,
>
> daniel.lezcano@linaro.org wrote on Wed, 18 Jan 2023 23:26:10 +0100:
>
>> The driver browses the trip point to find out the critical trip
>> temperature. However the function thermal_zone_get_crit_temp() does
>> already that, so the routine is pointless in the driver.
>>
>> Use thermal_zone_get_crit_temp() instead of inspecting all the trip
>> points.
>>
>> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
>> ---
>> drivers/thermal/armada_thermal.c | 38 +++++++++++++-------------------
>> 1 file changed, 15 insertions(+), 23 deletions(-)
>>
>> diff --git a/drivers/thermal/armada_thermal.c b/drivers/thermal/armada_thermal.c
>> index db040dbdaa0a..c6d51d8acbf0 100644
>> --- a/drivers/thermal/armada_thermal.c
>> +++ b/drivers/thermal/armada_thermal.c
>> @@ -784,34 +784,26 @@ static int armada_configure_overheat_int(struct armada_thermal_priv *priv,
>> int sensor_id)
>> {
>> /* Retrieve the critical trip point to enable the overheat interrupt */
>> - struct thermal_trip trip;
>> + int temperature;
>> int ret;
>> - int i;
>> -
>> - for (i = 0; i < thermal_zone_get_num_trips(tz); i++) {
>> -
>> - ret = thermal_zone_get_trip(tz, i, &trip);
>> - if (ret)
>> - return ret;
>> -
>> - if (trip.type != THERMAL_TRIP_CRITICAL)
>> - continue;
>> -
>> - ret = armada_select_channel(priv, sensor_id);
>> - if (ret)
>> - return ret;
>>
>> - armada_set_overheat_thresholds(priv, trip.temperature,
>> - trip.hysteresis);
>> - priv->overheat_sensor = tz;
>> - priv->interrupt_source = sensor_id;
>> + ret = thermal_zone_get_crit_temp(tz, &temperature);
>> + if (ret)
>> + return ret;
>>
>> - armada_enable_overheat_interrupt(priv);
>> + ret = armada_select_channel(priv, sensor_id);
>> + if (ret)
>> + return ret;
>>
>> - return 0;
>> - }
>> + /*
>> + * A critical temperature does not have a hysteresis
>> + */
>
> Makes sense.
>
> Nit: I would actually put that comment in the commit log rather than
> keeping it in the code, but whatever, that's a nice simplification.

Oh, actually, I added the comment because of the third parameter change
for armada_set_overheat_thresholds(..., 0);

>> + armada_set_overheat_thresholds(priv, temperature, 0);

I think it makes sense to keep the comment to clarify why we pass this
zero temperature argument.

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