Re: [PATCH v3 4/4] tty: serial: msm_geni_serial: Add serial driver support for GENI based QUP

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Quoting Karthik Ramasubramanian (2018-03-07 22:06:29)
> 
> 
> On 3/6/2018 2:45 PM, Stephen Boyd wrote:
> > Quoting Karthik Ramasubramanian (2018-03-05 16:51:23)
> >> On 3/2/2018 3:11 PM, Stephen Boyd wrote:
> > 
> > Ok. I've seen similar designs in some mmc drivers. For example, you can
> > look at drivers/mmc/host/meson-gx-mmc.c and see that they register a
> > clk_ops and then just start using that clk directly from the driver.
> > There are also some helper functions for dividers that would hopefully
> > make the job of calculating the best divider easier.
> Thanks for the pointers. I will take a look at it. In the meanwhile I 
> had discussions with our clock team. They pointed out that the register 
> to write the divider value here is outside the scope of clock controller 
> which makes it trickier to implement your suggestion. They are already 
> in the mailing list and we will discuss further and get back to you in 
> this regard.

Ok. Let me know if I can help answer any questions.

> >>>
> >>> Why are these noirq variants? Please add a comment.
> >> The intention is to enable the console UART port usage as late as
> >> possible in the suspend cycle. Hence noirq variants. I will add this as
> >> a comment. Please let me know if the usage does not match the intention.
> > 
> > Hm.. Does no_console_suspend not work? Or not work well enough?
> It works. When console suspend is disabled, the suspend operation does 
> not get triggered and the resume operation checks if the console suspend 
> is disabled and performs the needed thing.

Ok so then do we need the noirq variants? Or console suspend is special
enough for this to not matter?
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