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Message-ID: <20200727215010.qzhvavmskfoaapi5@mobilestation>
Date: Tue, 28 Jul 2020 00:50:10 +0300
From: Serge Semin <Sergey.Semin@...kalelectronics.ru>
To: Andy Shevchenko <andy.shevchenko@...il.com>
CC: Serge Semin <fancer.lancer@...il.com>,
Hoan Tran <hoan@...amperecomputing.com>,
Linus Walleij <linus.walleij@...aro.org>,
Bartosz Golaszewski <bgolaszewski@...libre.com>,
Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
Pavel Parkhomenko <Pavel.Parkhomenko@...kalelectronics.ru>,
Rob Herring <robh+dt@...nel.org>,
"open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
devicetree <devicetree@...r.kernel.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 4/7] gpio: dwapb: Convert driver to using the
GPIO-lib-based IRQ-chip
On Sat, Jul 25, 2020 at 03:12:49PM +0300, Andy Shevchenko wrote:
> On Sat, Jul 25, 2020 at 2:03 AM Serge Semin
> <Sergey.Semin@...kalelectronics.ru> wrote:
> > On Thu, Jul 23, 2020 at 01:03:17PM +0300, Andy Shevchenko wrote:
> > > On Thu, Jul 23, 2020 at 04:38:55AM +0300, Serge Semin wrote:
...
> > > > + /* This will let us handle the parent IRQ in the driver */
> > > > + girq->parents = NULL;
> > > > + girq->num_parents = 0;
> > > > + girq->parent_handler = NULL;
>
> > > Shan't we do this before request_irq() call (at least for consistency with the
> > > rest of the drivers)?
> >
> > Technically we shan't. Please elaborate which drivers you are referring to?
>
> All of them? Recent patches for IRQ chip template do something like
>
> girq = &...;
> girq->foo = bar;
> ...
> ret = request_irq(...);
>
> ...and here no more girq->baz = gaz; lines.
>
> > Even the recent Linus' series "Use irqchip template" mostly does it in the
> > same order.
>
> Funny, that's what I;m referring to.
It turns out my "mostly" was wrong in this matter. It's 4 out of 17 patches,
which make the initialization in the same order as mine:
drivers/gpio/gpio-max732x.c
drivers/gpio/gpio-pca953x.c
drivers/gpio/gpio-pcf857x.c
drivers/gpio/gpio-adp5588.c
while the rest of them does it in the order suggested by you:
drivers/gpio/gpio-pci-idio-16.c
drivers/gpio/gpio-pcie-idio-24.c
drivers/gpio/gpio-104-idio-16.c
drivers/gpio/gpio-104-dio-48e.c
drivers/gpio/gpio-ws16c48.c
drivers/gpio/gpio-rcar.c
drivers/gpio/gpio-wcove.c
drivers/pinctrl/pinctrl-amd.c
drivers/gpio/gpio-crystalcove.c
drivers/pinctrl/pinctrl-mcp23s08.c
drivers/pinctrl/pinctrl-sx150x.c
drivers/pinctrl/pinctrl-stmfx.c
drivers/gpio/gpio-tc3589x.c
Then, let's use the same order here as the most of the drivers do just for
consistency.
-Sergey
>
> --
> With Best Regards,
> Andy Shevchenko
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