netdev - Re: [PATCH net-next v8 6/9] net: txgbe: Support GPIO to SFP socket

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Date: Tue, 23 May 2023 14:07:28 +0300
From: Andy Shevchenko <andy.shevchenko@...il.com>
To: Jiawen Wu <jiawenwu@...stnetic.com>
Cc: Michael Walle <michael@...le.cc>, Andrew Lunn <andrew@...n.ch>, netdev@...r.kernel.org, 
	jarkko.nikula@...ux.intel.com, andriy.shevchenko@...ux.intel.com, 
	mika.westerberg@...ux.intel.com, jsd@...ihalf.com, Jose.Abreu@...opsys.com, 
	hkallweit1@...il.com, linux@...linux.org.uk, linux-i2c@...r.kernel.org, 
	linux-gpio@...r.kernel.org, mengyuanlou@...-swift.com
Subject: Re: [PATCH net-next v8 6/9] net: txgbe: Support GPIO to SFP socket

On Tue, May 23, 2023 at 12:57 PM Jiawen Wu <jiawenwu@...stnetic.com> wrote:
> > > Anyway it is a bit complicated, could I use this version of GPIO implementation if
> > > it's really tough?
> >
> > It's possible but from GPIO subsystem point of view it's discouraged
> > as long as there is no technical impediment to go the regmap way.
>
> After these days of trying, I guess there are still some bugs on gpio - regmap - irq.
> It looks like an compatibility issue with gpio_irq_chip and regmap_irq_chip (My rough
> fixes seems to work).
>
> Other than that, it seems to be no way to add interrupt trigger in regmap_irq_thread(),
> to solve the both-edge problem for my hardware.
>
> I'd be willing to use gpio-regmap if above issues worked out, I learned IRQ controller,
> IRQ domain, etc. , after all.

And thank you for all this!
Now you may suggest the fixes to the GPIO regmap with all your
knowledge of the area.

> But if not, I'd like to implement GPIO in the original way,
> it was tested to work. May I? Thanks for all your suggestions.


-- 
With Best Regards,
Andy Shevchenko