Messages in this thread | | | Date | Wed, 24 Mar 2021 15:10:35 +0000 | From | Lee Jones <> | Subject | Re: [PATCH v2 2/2] mfd: intel_quark_i2c_gpio: enable MSI interrupt |
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On Wed, 24 Mar 2021, Andy Shevchenko wrote:
> On Wed, Mar 24, 2021 at 01:07:23PM +0000, Lee Jones wrote: > > On Wed, 24 Mar 2021, Andy Shevchenko wrote: > > > > > On Wed, Mar 24, 2021 at 11:50:33AM +0000, Lee Jones wrote: > > > > On Wed, 24 Mar 2021, Andy Shevchenko wrote: > > > > > > > > > On Wed, Mar 24, 2021 at 10:47:29AM +0000, Lee Jones wrote: > > > > > > On Wed, 24 Mar 2021, Andy Shevchenko wrote: > > > > > > > On Wed, Mar 24, 2021 at 10:29:31AM +0000, Lee Jones wrote: > > > > > > > > On Tue, 23 Mar 2021, Andy Shevchenko wrote: > > > > > > > > > > ... > > > > > > > > > > > Also, past acceptance does not guarantee ideal/correct usage. > > > > > > > > > > In this case it's hardly can be misused. But I heard you. > > > > > > > > > > ... > > > > > > > > > > > > The semantic is min-max range and having two defines (*) here for these seems > > > > > > > to me as an utter overkill. > > > > > > > > > > > > > > Of course, if you insist I may do it. > > > > > > > > > > > > > > *) since value is the same, we might have one definition, but it will be even > > > > > > > more confusion to have it as a min and max at the same time. > > > > > > > > > > > > It's just tricky to decypher for people who do not know the API, which > > > > > > is most people, myself included. For APIs like usleep_range() et al., > > > > > > obviously this makes no sense at all. > > > > > > > > > > Seem like you are insisting. Okay, I will define them. What do you prefer one > > > > > or two definitions? > > > > > > > > Actually I'm not. I'm just trying to get my head around where the > > > > data comes from and what the values actually mean. > > > > > > > > > ... > > > > > > > > > > > What defines a vector? > > > > > > > > > > The combination is solely of the driver-hardware. Driver explicitly tells that > > > > > how many vectors it may consume (taking into account the range asked) and API > > > > > returns amount given or an error. > > > > > > > > So, where does the information actually come from? > > > > > > > > Information that comes from a datasheet is usually defined. > > > > > > > > Information that comes from the F/W is usually read and popped into a > > > > variable. > > > > > > It's a two way road: > > > a) driver states that it needs only 1 vector and it's enough to it > > > b) hardware must provide at least 1 vector to be served by this driver. > > > > > > Look again into grepped output. Most of drivers that define it as an variable > > > may dynamically adapt to the different amount of IRQ vectors. When it's static, > > > usually drivers just hard code those values. > > > > > > I'm really don't see a point to define them _in this driver_. > > > > That's fine. I just felt like I had to ask. > > > > Would you consider a comment that lets people unfamiliar with the API > > what the values mean? > > > > Something to the tune of: > > > > "This driver requests 1 (and only 1) IRQ vector" > > > Rather > > "This driver requests only 1 (and it's enough) IRQ vector"
"This driver only requires 1 IRQ vector"
> or something like this. > > Should I send a patch with the comment included? If so, please suggest if it's > good from English grammar/style perspective. >
-- Lee Jones [李琼斯] Senior Technical Lead - Developer Services Linaro.org │ Open source software for Arm SoCs Follow Linaro: Facebook | Twitter | Blog
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