Re: [PATCH v9 4/6] clocksource: stm32: add clocksource support

From: Benjamin Gaignard
Date: Fri Dec 08 2017 - 09:19:32 EST


2017-12-08 15:08 GMT+01:00 Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>:
> On 08/12/2017 15:04, Benjamin Gaignard wrote:
>> 2017-12-08 14:46 GMT+01:00 Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>:
>>> On 08/12/2017 12:32, Benjamin Gaignard wrote:
>>>> The stm32 timer hardware is currently only used as a clock event device,
>>>> but it can be utilized as a clocksource as well.
>>>>
>>>> Implement this by enabling the free running counter in the hardware block
>>>> and converting the clock event part from a count down event timer to a
>>>> comparator based timer.
>>>
>>>
>>> Split this patch in two:
>>> - periodic support
>>> - clocksource support
>>
>> No because the way of implementing periodic support depend of how clocksource
>> part is implemented on the hardware.
>> I don't want to code functions that I will completely remove just after
>
> Sorry, I don't get it. Can you elaborate please ?

To add clocksource support I use the counter part of the hardware
which was before
used for clockevent and make clockevent use the comparator instead.
So implementing periodic on counter side of the hardware is a waste of
time because
I will to remove right after

>
>
> --
> <http://www.linaro.org/> Linaro.org â 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
>