linux-kernel - Re: [RFC PATH 2/2] gpio: starfive-jh7100: Add StarFive JH7100 GPIO driver

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Message-ID: <20210702210010.GB1035183@x1>
Date:   Fri, 2 Jul 2021 14:00:10 -0700
From:   Drew Fustini <drew@...gleboard.org>
To:     Michael Walle <michael@...le.cc>, g@x1
Cc:     Rob Herring <robh+dt@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Michael Zhu <michael.zhu@...rfivetech.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Fu Wei <tekkamanninja@...il.com>, linux-kernel@...r.kernel.org,
        linux-gpio@...r.kernel.org, linux-riscv@...ts.infradead.org,
        devicetree@...r.kernel.org, Emil Renner Berthing <kernel@...il.dk>,
        Huan Feng <huan.feng@...rfivetech.com>
Subject: Re: [RFC PATH 2/2] gpio: starfive-jh7100: Add StarFive JH7100 GPIO
 driver

On Thu, Jul 01, 2021 at 08:39:40AM +0200, Michael Walle wrote:
> Hi Drew,
> 
> Am 2021-07-01 02:20, schrieb Drew Fustini:
> > Add GPIO driver for the StarFive JH7100 SoC [1] used on the
> > BeagleV Starlight JH7100 board [2].
> > 
> > [1] https://github.com/starfive-tech/beaglev_doc/
> > [2] https://github.com/beagleboard/beaglev-starlight
> > 
> > Signed-off-by: Emil Renner Berthing <kernel@...il.dk>
> > Signed-off-by: Huan Feng <huan.feng@...rfivetech.com>
> > Signed-off-by: Drew Fustini <drew@...gleboard.org>
> 
> Could this driver use GPIO_REGMAP and REGMAP_IRQ? See
> drivers/gpio/gpio-sl28cpld.c for an example.
> 
> -michael

I looked more at the example.  Do you have a suggestion of how to handle
different types of interrupts?  

This gpio controller can handle level triggered and edge triggered.
Edge triggered can be positve, negative or both. Level trigger can be
high or low.

Thanks,
Drew