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From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Linus Walleij <linus.walleij@linaro.org>
Cc: Serge Semin <Sergey.Semin@baikalelectronics.ru>,
	Lee Jones <lee.jones@linaro.org>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	"open list:GPIO SUBSYSTEM" <linux-gpio@vger.kernel.org>,
	Hoan Tran <hoan@os.amperecomputing.com>,
	Serge Semin <fancer.lancer@gmail.com>,
	Bartosz Golaszewski <bgolaszewski@baylibre.com>
Subject: Re: [PATCH v2 2/4] gpio: dwapb: Read GPIO base from gpio-base property
Date: Wed, 11 Aug 2021 16:05:07 +0300	[thread overview]
Message-ID: <YRPLA5xMDS5EnYrc@smile.fi.intel.com> (raw)
In-Reply-To: <CACRpkdazSqdOaoCknv=0wo3vw-FjrZKAy0rgh1hFbgd6au0vYw@mail.gmail.com>

On Wed, Aug 11, 2021 at 02:50:46PM +0200, Linus Walleij wrote:
> On Wed, Aug 4, 2021 at 6:15 PM Andy Shevchenko
> <andriy.shevchenko@linux.intel.com> wrote:
> 
> > For backward compatibility with some legacy devices introduce
> > a new (*) property gpio-base to read GPIO base. This will allow
> > further cleaning up of the driver.
> >
> > *) Note, it's not new for the GPIO library since the mockup driver
> >    is using it already.
> >
> > Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> > ---
> > v2: added check to ensure that the property won't be used by FW (Serge)
> >  drivers/gpio/gpio-dwapb.c | 4 ++++
> >  1 file changed, 4 insertions(+)
> >
> > diff --git a/drivers/gpio/gpio-dwapb.c b/drivers/gpio/gpio-dwapb.c
> > index 4c7153cb646c..674e91e69cc5 100644
> > --- a/drivers/gpio/gpio-dwapb.c
> > +++ b/drivers/gpio/gpio-dwapb.c
> > @@ -584,6 +584,10 @@ static struct dwapb_platform_data *dwapb_gpio_get_pdata(struct device *dev)
> >
> >                 pp->gpio_base   = -1;
> >
> > +               /* For internal use only, new platforms mustn't exercise this */
> > +               if (is_software_node(fwnode))
> > +                       fwnode_property_read_u32(fwnode, "gpio-base", &pp->gpio_base);
> 
> You rewrite the code quicker than I can review  :D

Sorry for that :-)

> So this is elegant, I would prefer "linux,gpio-base" but the
> overall change is more important, with or without that change:

I'm okay with the either, but the thing is that gpio-base is already in use.
Perhaps in the future somebody can change both (gpio-mockup and this driver)
to use the proposed one (AFAIU we free to change it since it's not part of FW
interface).

> Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

Thanks!

-- 
With Best Regards,
Andy Shevchenko



  reply	other threads:[~2021-08-11 13:05 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-04 16:00 [PATCH v2 1/4] gpio: dwapb: Unify ACPI enumeration checks in get_irq() and configure_irqs() Andy Shevchenko
2021-08-04 16:00 ` [PATCH v2 2/4] gpio: dwapb: Read GPIO base from gpio-base property Andy Shevchenko
2021-08-05 10:38   ` Andy Shevchenko
2021-08-05 12:08     ` Serge Semin
2021-08-11 12:50   ` Linus Walleij
2021-08-11 13:05     ` Andy Shevchenko [this message]
2021-08-04 16:00 ` [PATCH v2 3/4] mfd: intel_quark_i2c_gpio: Convert GPIO to use software nodes Andy Shevchenko
2021-08-05  8:02   ` Lee Jones
2021-08-11 13:00     ` Andy Shevchenko
2021-08-16  7:17       ` Lee Jones
2021-08-11 12:48   ` Linus Walleij
2021-08-04 16:00 ` [PATCH v2 4/4] gpio: dwapb: Get rid of legacy platform data Andy Shevchenko
2021-08-11 12:42 ` [PATCH v2 1/4] gpio: dwapb: Unify ACPI enumeration checks in get_irq() and configure_irqs() Andy Shevchenko
2021-08-11 12:55   ` Andy Shevchenko

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