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SubjectRe: [PATCH 1/1] thermal: sysfs: avoid actual readings from sysfs
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Hi Eduardo,

On 01/07/2023 03:38, Eduardo Valentin wrote:
> Hey Daniel,
>
> On Fri, Jun 30, 2023 at 12:11:25PM +0200, Daniel Lezcano wrote:
>>
>>
>>
>> Hi Rafael,
>>
>> On 30/06/2023 10:16, Rafael J. Wysocki wrote:
>>> On Wed, Jun 28, 2023 at 11:10 PM Eduardo Valentin <evalenti@kernel.org> wrote:
>>
>> [ ... ]
>>
>>> So what about adding a new zone attribute that can be used to specify
>>> the preferred caching time for the temperature?
>>>
>>> That is, if the time interval between two consecutive updates of the
>>> cached temperature value is less than the value of the new attribute,
>>> the cached temperature value will be returned by "temp". Otherwise,
>>> it will cause the sensor to be read and the value obtained from it
>>> will be returned to user space and cached.
>>>
>>> If the value of the new attribute is 0, everything will work as it
>>> does now (which will also need to be the default behavior).
>>
>> I'm still not convinced about the feature.
>>
>> Eduardo provided some numbers but they seem based on the characteristics
>> of the I2C, not to a real use case. Eduardo?
>
> Why I2C is not a real use case?

What I meant is "I2C is slow, ok. But what is the setup where the
problem arises?"


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