Re: [PATCH v6 15/29] x86/hpet: Add helper function hpet_set_comparator_periodic()

From: Thomas Gleixner
Date: Sat May 14 2022 - 04:17:51 EST


On Fri, May 13 2022 at 14:19, Ricardo Neri wrote:
> On Fri, May 06, 2022 at 11:41:13PM +0200, Thomas Gleixner wrote:
>> The argument about not bloating the code
>> with an "obvious???" function which is quite small is slightly beyond my
>> comprehension level.
>
> That obvious function would look like this:
>
> void hpet_set_comparator_one_shot(int channel, u32 delta)
> {
> u32 count;
>
> count = hpet_readl(HPET_COUNTER);
> count += delta;
> hpet_writel(count, HPET_Tn_CMP(channel));
> }

This function only works reliably when the delta is large. See
hpet_clkevt_set_next_event().

Thanks,

tglx