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Date: Wed, 22 Sep 2021 17:05:45 +0900 From: Chanwoo Choi <cwchoi00@...il.com> To: Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>, Rob Herring <robh+dt@...nel.org>, Chanwoo Choi <cw00.choi@...sung.com>, MyungJoo Ham <myungjoo.ham@...sung.com>, Kyungmin Park <kyungmin.park@...sung.com>, devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org Cc: Marek Szyprowski <m.szyprowski@...sung.com>, Sylwester Nawrocki <snawrocki@...nel.org>, Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com> Subject: Re: [PATCH v2 2/3] devfreq: exynos-ppmu: simplify parsing event-type from DT Hi Krzysztof, On 21. 9. 20. 오후 4:17, Krzysztof Kozlowski wrote: > When parsing devicetree, the function of_get_devfreq_events(), for each > device child node, iterates over array of possible events "ppmu_events" > till it finds one matching by node name. When match is found the > ppmu_events[i] points to element having both the name of the event and > the counters ID. > > Each PPMU device child node might have an "event-name" property with the > name of the event, however due to the design of devfreq it must be the > same as the device node name. If it is not the same, the devfreq client > won't be able to use it via devfreq_event_get_edev_by_phandle(). > > Since PPMU device child node name must be equal to the "event-name" > property (event-name == ppmu_events[i].name), there is no need to find > the counters ID by the "event-name". Instead use ppmu_events[i].id > which must be equal to it. > > Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com> > --- > drivers/devfreq/event/exynos-ppmu.c | 5 +---- > 1 file changed, 1 insertion(+), 4 deletions(-) > > diff --git a/drivers/devfreq/event/exynos-ppmu.c b/drivers/devfreq/event/exynos-ppmu.c > index 541bd13ab61d..9b849d781116 100644 > --- a/drivers/devfreq/event/exynos-ppmu.c > +++ b/drivers/devfreq/event/exynos-ppmu.c > @@ -566,13 +566,10 @@ static int of_get_devfreq_events(struct device_node *np, > * use default if not. > */ > if (info->ppmu_type == EXYNOS_TYPE_PPMU_V2) { > - int id; > /* Not all registers take the same value for > * read+write data count. > */ > - id = __exynos_ppmu_find_ppmu_id(desc[j].name); > - > - switch (id) { > + switch (ppmu_events[i].id) { > case PPMU_PMNCNT0: > case PPMU_PMNCNT1: > case PPMU_PMNCNT2: > Applied it. Thanks. -- Best Regards, Samsung Electronics Chanwoo Choi
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