From: Andy Shevchenko <andy.shevchenko@gmail.com>
To: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Cc: Jan Kiszka <jan.kiszka@siemens.com>,
"Enrico Weigelt, metux IT consult" <lkml@metux.net>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Mika Westerberg <mika.westerberg@linux.intel.com>,
Linus Walleij <linus.walleij@linaro.org>,
Bartosz Golaszewski <bgolaszewski@baylibre.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
"open list:GPIO SUBSYSTEM" <linux-gpio@vger.kernel.org>,
ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Subject: Re: [PATCH 2/2] gpio: sch: Add interrupt support
Date: Fri, 26 Apr 2019 20:44:36 +0300 [thread overview]
Message-ID: <CAHp75VdcS_LaKNhaKsFaWa9ReQw4KRDRpc-81kv0Hb9wbZFCTg@mail.gmail.com> (raw)
Message-ID: <20190426174436.rYIIZq7EHvBKfYgsoQy_luC-i-QODkAu2FKl62y9Msc@z> (raw)
In-Reply-To: <20190426173329.GA31161@Mani-XPS-13-9360>
On Fri, Apr 26, 2019 at 8:33 PM Manivannan Sadhasivam
<manivannan.sadhasivam@linaro.org> wrote:
> On Fri, Apr 26, 2019 at 08:20:19PM +0300, Andy Shevchenko wrote:
> > On Fri, Apr 26, 2019 at 7:05 PM Jan Kiszka <jan.kiszka@siemens.com> wrote:
> > > On 26.04.19 16:42, Enrico Weigelt, metux IT consult wrote:
> > > > On 26.04.19 15:36, Jan Kiszka wrote:
> > The problem here is opaque number. This has to be chip + *relative* pin number/
> > See this:
> > https://stackoverflow.com/questions/55532410/how-do-linux-gpio-numbers-get-their-values/55579640#55579640
> >
>
> But for platform like 96Boards we don't need controller specific lookup, these
> are all handled by the platform code [1] so that the users can use the standard
> pinout number to access GPIOs.
This is a complete mistake.
There is *no* global GPIO numbers anymore in Linux. (I don't count
very old legacy platforms)
Read above, it applies to DT or whatever resource provider.
> For instance, pin 23 on the Low Speed expansion
> header is the GPIO for all 96Boards platform, so the user can access that pin
> using 23 itself in the application and it will run across all supported
> 96Boards.
>
> That's one of the reason why we prefer MRAA.
> [1] https://github.com/intel-iot-devkit/mraa/blob/master/src/arm/96boards.c#L75
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2019-04-26 17:44 UTC|newest]
Thread overview: 71+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <cover.1555579429.git.jan.kiszka@siemens.com>
[not found] ` <c9f40465c6effc7b8efd6cbf8461d71d80c80033.1555579429.git.jan.kiszka@siemens.com>
2019-04-24 7:58 ` [PATCH 2/2] gpio: sch: Add interrupt support Mika Westerberg
2019-04-24 7:58 ` Mika Westerberg
2019-04-24 8:12 ` Jan Kiszka
2019-04-24 8:12 ` Jan Kiszka
2019-04-24 8:18 ` Mika Westerberg
2019-04-24 8:18 ` Mika Westerberg
2019-04-24 8:25 ` Jan Kiszka
2019-04-24 8:25 ` Jan Kiszka
2019-04-24 8:42 ` Mika Westerberg
2019-04-24 8:42 ` Mika Westerberg
2019-04-24 9:36 ` Jan Kiszka
2019-04-24 9:36 ` Jan Kiszka
2019-04-24 9:45 ` Mika Westerberg
2019-04-24 9:45 ` Mika Westerberg
2019-04-24 9:48 ` Jan Kiszka
2019-04-24 9:48 ` Jan Kiszka
2019-04-24 10:01 ` Mika Westerberg
2019-04-24 10:01 ` Mika Westerberg
2019-04-24 10:19 ` Jan Kiszka
2019-04-24 10:19 ` Jan Kiszka
2019-04-24 10:33 ` Mika Westerberg
2019-04-24 10:33 ` Mika Westerberg
2019-04-24 10:39 ` Jan Kiszka
2019-04-24 10:39 ` Jan Kiszka
2019-04-24 10:46 ` Mika Westerberg
2019-04-24 10:46 ` Mika Westerberg
2019-04-24 12:41 ` Jan Kiszka
2019-04-24 12:41 ` Jan Kiszka
2019-04-24 13:13 ` Mika Westerberg
2019-04-24 13:13 ` Mika Westerberg
2019-04-24 14:24 ` Jan Kiszka
2019-04-24 14:24 ` Jan Kiszka
2019-04-24 15:33 ` Mika Westerberg
2019-04-24 15:33 ` Mika Westerberg
2019-04-26 13:06 ` Andy Shevchenko
2019-04-26 13:06 ` Andy Shevchenko
2019-04-26 13:36 ` Jan Kiszka
2019-04-26 13:36 ` Jan Kiszka
2019-04-26 14:42 ` Enrico Weigelt, metux IT consult
2019-04-26 14:42 ` Enrico Weigelt, metux IT consult
2019-04-26 15:31 ` Manivannan Sadhasivam
2019-04-26 15:31 ` Manivannan Sadhasivam
2019-04-26 16:03 ` Jan Kiszka
2019-04-26 16:03 ` Jan Kiszka
2019-04-26 17:20 ` Andy Shevchenko
2019-04-26 17:20 ` Andy Shevchenko
2019-04-26 17:33 ` Manivannan Sadhasivam
2019-04-26 17:33 ` Manivannan Sadhasivam
2019-04-26 17:39 ` Jan Kiszka
2019-04-26 17:39 ` Jan Kiszka
2019-04-26 17:46 ` Manivannan Sadhasivam
2019-04-26 17:46 ` Manivannan Sadhasivam
2019-04-26 17:52 ` Jan Kiszka
2019-04-26 17:52 ` Jan Kiszka
2019-04-26 17:56 ` Manivannan Sadhasivam
2019-04-26 17:56 ` Manivannan Sadhasivam
2019-04-26 17:44 ` Andy Shevchenko [this message]
2019-04-26 17:44 ` Andy Shevchenko
2019-04-26 17:52 ` Manivannan Sadhasivam
2019-04-26 17:52 ` Manivannan Sadhasivam
2019-04-26 18:26 ` Andy Shevchenko
2019-04-26 18:26 ` Andy Shevchenko
2019-04-26 17:37 ` Jan Kiszka
2019-04-26 17:37 ` Jan Kiszka
2019-04-29 11:09 ` Enrico Weigelt, metux IT consult
2019-04-29 11:09 ` Enrico Weigelt, metux IT consult
2019-05-16 12:20 ` Linus Walleij
2019-04-26 14:41 ` Linus Walleij
2019-04-26 14:41 ` Linus Walleij
2019-04-26 15:44 ` Jan Kiszka
2019-04-26 15:44 ` Jan Kiszka
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