From: Mika Westerberg <mika.westerberg-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
To: Linus Walleij <linus.walleij-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
Cc: Alexandre Courbot
<acourbot-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>,
"Rafael J. Wysocki"
<rafael.j.wysocki-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
Mathias Nyman
<mathias.nyman-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>,
Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>,
Grant Likely
<grant.likely-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
Thierry Reding
<thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Stephen Warren <swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>,
Alexandre Courbot
<gnurou-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
"linux-gpio-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-gpio-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"linux-doc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-doc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"linux-arch-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-arch-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: [RFC 0/5] New descriptor-based GPIO interface
Date: Mon, 23 Sep 2013 13:21:35 +0300 [thread overview]
Message-ID: <20130923102134.GB28875@intel.com> (raw)
In-Reply-To: <CACRpkdYjkDf7c9VxfDTHtFx_upWWRAK8vpXTkrkrRsMjErq1dQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
On Fri, Sep 20, 2013 at 08:06:00PM +0200, Linus Walleij wrote:
> On Wed, Sep 4, 2013 at 1:29 PM, Alexandre Courbot <acourbot-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> wrote:
>
> > Here is a first RFC for the new GPIO interface.
>
> I'm quite happy with this, and given that all DT-implementations will start
> to use it from day 1 I'll happily merge it when you think it's tested enough.
>
> On my wishlist is to also switch over the ACPI GPIO driver:
> drivers/gpio/gpiolib-acpi.c to use the descriptors directly, so
> I'd like one of the ACPI folks to have a look at this patch set
> and see how it looks from their angle.
>
> Mika, Rafael, Mathias, and either of you guys have a look
> at this?
Apart from the con_id thing I commented, I don't see huge problems
converting the ACPI GPIO helpers to this new interface.
One thing that is special to ACPI is that we have two kind of GPIO
"connections":
GpioIo - a normal GPIO that the driver can toggle or read values
GpioInt - this is specifically used as a GPIO interrupt
The drivers should be able to distinguish between the two. Currently we
have an extra parameter in acpi_get_gpio_by_index(..., &info) that can be
used for this. However, with the new gpiod_get() I'm not sure how we are
supposed to do this now?
Anyway, that shouldn't prevent merging this patch set. I'm sure that we can
come up with some working solution :-)
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WARNING: multiple messages have this Message-ID (diff)
From: Mika Westerberg <mika.westerberg@linux.intel.com>
To: Linus Walleij <linus.walleij@linaro.org>
Cc: Alexandre Courbot <acourbot@nvidia.com>,
"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
Mathias Nyman <mathias.nyman@linux.intel.com>,
Arnd Bergmann <arnd@arndb.de>,
Grant Likely <grant.likely@linaro.org>,
Thierry Reding <thierry.reding@gmail.com>,
Stephen Warren <swarren@wwwdotorg.org>,
Alexandre Courbot <gnurou@gmail.com>,
"linux-gpio@vger.kernel.org" <linux-gpio@vger.kernel.org>,
"linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-arch@vger.kernel.org" <linux-arch@vger.kernel.org>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>
Subject: Re: [RFC 0/5] New descriptor-based GPIO interface
Date: Mon, 23 Sep 2013 13:21:35 +0300 [thread overview]
Message-ID: <20130923102134.GB28875@intel.com> (raw)
Message-ID: <20130923102135.vrXIOvqw2-fG37_oAzGd85jj_yUEcsQFb02XW1CZXu4@z> (raw)
In-Reply-To: <CACRpkdYjkDf7c9VxfDTHtFx_upWWRAK8vpXTkrkrRsMjErq1dQ@mail.gmail.com>
On Fri, Sep 20, 2013 at 08:06:00PM +0200, Linus Walleij wrote:
> On Wed, Sep 4, 2013 at 1:29 PM, Alexandre Courbot <acourbot@nvidia.com> wrote:
>
> > Here is a first RFC for the new GPIO interface.
>
> I'm quite happy with this, and given that all DT-implementations will start
> to use it from day 1 I'll happily merge it when you think it's tested enough.
>
> On my wishlist is to also switch over the ACPI GPIO driver:
> drivers/gpio/gpiolib-acpi.c to use the descriptors directly, so
> I'd like one of the ACPI folks to have a look at this patch set
> and see how it looks from their angle.
>
> Mika, Rafael, Mathias, and either of you guys have a look
> at this?
Apart from the con_id thing I commented, I don't see huge problems
converting the ACPI GPIO helpers to this new interface.
One thing that is special to ACPI is that we have two kind of GPIO
"connections":
GpioIo - a normal GPIO that the driver can toggle or read values
GpioInt - this is specifically used as a GPIO interrupt
The drivers should be able to distinguish between the two. Currently we
have an extra parameter in acpi_get_gpio_by_index(..., &info) that can be
used for this. However, with the new gpiod_get() I'm not sure how we are
supposed to do this now?
Anyway, that shouldn't prevent merging this patch set. I'm sure that we can
come up with some working solution :-)
next prev parent reply other threads:[~2013-09-23 10:21 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-04 11:29 [RFC 0/5] New descriptor-based GPIO interface Alexandre Courbot
2013-09-04 11:29 ` Alexandre Courbot
2013-09-04 11:29 ` [RFC 1/5] gpiolib: factorize gpiod_get/set functions Alexandre Courbot
2013-09-04 11:29 ` Alexandre Courbot
2013-09-20 8:36 ` Linus Walleij
2013-09-21 12:39 ` Alexandre Courbot
2013-09-04 11:29 ` [RFC 2/5] gpiolib: export descriptor-based GPIO interface Alexandre Courbot
2013-09-04 11:29 ` Alexandre Courbot
2013-09-04 19:58 ` Stephen Warren
2013-09-05 3:45 ` Alexandre Courbot
2013-09-04 11:29 ` [RFC 3/5] gpiolib: port of_ functions to use gpiod Alexandre Courbot
2013-09-04 11:29 ` Alexandre Courbot
2013-09-04 11:29 ` [RFC 4/5] gpiolib: add gpiod_get() and gpiod_put() functions Alexandre Courbot
2013-09-04 11:29 ` Alexandre Courbot
2013-09-04 19:56 ` Stephen Warren
2013-09-05 3:44 ` Alexandre Courbot
2013-09-11 13:57 ` Thierry Reding
[not found] ` <52279082.5010105-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2013-09-20 18:40 ` Linus Walleij
2013-09-20 18:40 ` Linus Walleij
[not found] ` <CACRpkdY70r8mL8PSDmexr+_0Ddi-Y8x0RaDF-WWucZM9V8n=yw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-09-23 9:31 ` Mika Westerberg
2013-09-23 9:31 ` Mika Westerberg
2013-09-04 11:29 ` [RFC 5/5] gpiolib: update documentation Alexandre Courbot
2013-09-04 11:29 ` Alexandre Courbot
2013-09-20 17:59 ` Linus Walleij
2013-09-20 8:28 ` [RFC 0/5] New descriptor-based GPIO interface Linus Walleij
2013-09-20 18:06 ` Linus Walleij
2013-09-20 19:32 ` Thierry Reding
2013-09-20 21:23 ` Linus Walleij
[not found] ` <CACRpkdbFhORYnAUf+BMXtL1LezL7gPJ6gKQnqwvKZjqqCt3A4Q-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-09-21 12:32 ` Alexandre Courbot
2013-09-21 12:32 ` Alexandre Courbot
[not found] ` <CACRpkdYjkDf7c9VxfDTHtFx_upWWRAK8vpXTkrkrRsMjErq1dQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-09-23 10:21 ` Mika Westerberg [this message]
2013-09-23 10:21 ` Mika Westerberg
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