Re: [PATCH v7 03/13] hwmon: pwm-fan: Use 64-bit division macros for period and duty cycle

[Guenter Roeck]

On 3/10/20 3:24 PM, Guru Das Srinagesh wrote:
> On Tue, Mar 10, 2020 at 08:05:58AM -0700, Guenter Roeck wrote:
>> I don't see support in the LED subsystem to utilize the PWM framework directly
>> for blinking. Plus, you say yourself that it isn't a _real_ use case, just a
>> theoretic one.
> 
> An example use case is a mobile phone OEM that wishes to set a period of
> 5 seconds or more for, say, a low battery slow blinking indication - currently
> this is not possible. The PWM framework not having direct support for
> blinking should not be a concern if the PWM peripheral being controlled
> supports it via register writes.
> 
>> Either case, the reason / use case for this series should be explained
>> in the summary patch. That is what it is for. That case is not made.
> 
> Will upload a new patchset adding more details in the summary patch.
> 

Well, let's assume that this is a real use case.

Please also add information about alternatives considered, such as keeping
the second-part of the period in a separate variable.

Guenter