From: Andy Shevchenko <andy.shevchenko@gmail.com>
To: Ricardo Ribalda <ribalda@google.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Mika Westerberg <mika.westerberg@linux.intel.com>,
ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
"open list:GPIO SUBSYSTEM" <linux-gpio@vger.kernel.org>
Subject: Re: [PATCH v1 2/3] Documentation: firmware-guide: gpio-properties: active_low only for GpioIo()
Date: Thu, 29 Oct 2020 19:17:53 +0200
Message-ID: <CAHp75VfuZPpBZsyUEyD_R+ZEjPms6Z9L1tDdBKYfusWnbhtyww@mail.gmail.com> (raw)
In-Reply-To: <CANiDSCuNVT=jr8rLyfWhGKNSOy5OnH7YBZaWSguBDVg219OGvQ@mail.gmail.com>
On Thu, Oct 29, 2020 at 4:55 PM Ricardo Ribalda <ribalda@google.com> wrote:
> On Thu, Oct 29, 2020 at 3:45 PM Andy Shevchenko
> <andriy.shevchenko@linux.intel.com> wrote:
> > On Wed, Oct 28, 2020 at 10:10:42PM +0100, Ricardo Ribalda wrote:
...
> > ActiveLevel field is described in 19.6.55 GpioInt (GPIO Interrupt Connection
> > Resource Descriptor Macro).
> >
> > > Without using the active_low, how can we describe a pin that is
> > > active low and has to trigger an irq on both edges?
> >
> > This is nonsense.
> > What does it mean?
>
> Let me try to explain myself again:
>
> I have a gpio pin that produces IRQs on both edges. so ActiveLevel is Both
>
> The problem is that the value of that pin is inverted: Low means 1 and
> high means 0.
>
> How can I describe that the pin "is inverted" without using the _DSD field?
"Both edges" and "inverted" or "polarity low" in one sentence make no sense.
--
With Best Regards,
Andy Shevchenko
next prev parent reply index
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-28 20:50 [PATCH v1 1/3] Documentation: firmware-guide: gpio-properties: Fix factual mistakes Andy Shevchenko
2020-10-28 20:51 ` [PATCH v1 2/3] Documentation: firmware-guide: gpio-properties: active_low only for GpioIo() Andy Shevchenko
2020-10-28 21:10 ` Ricardo Ribalda
2020-10-29 14:46 ` Andy Shevchenko
2020-10-29 14:54 ` Ricardo Ribalda
2020-10-29 17:17 ` Andy Shevchenko [this message]
2020-10-29 17:20 ` Andy Shevchenko
2020-10-29 17:25 ` Andy Shevchenko
2020-10-29 17:32 ` Ricardo Ribalda
2020-10-29 18:09 ` Ricardo Ribalda
2020-10-29 18:13 ` Andy Shevchenko
2020-10-29 18:58 ` Ricardo Ribalda
2020-10-29 19:11 ` Andy Shevchenko
2020-10-29 18:10 ` Andy Shevchenko
2020-10-29 8:13 ` Mika Westerberg
2020-10-28 20:51 ` [PATCH v1 3/3] Documentation: firmware-guide: gpio-properties: Clarify initial output state Andy Shevchenko
2020-10-29 8:16 ` Mika Westerberg
2020-10-29 8:13 ` [PATCH v1 1/3] Documentation: firmware-guide: gpio-properties: Fix factual mistakes Mika Westerberg
2020-10-29 11:10 ` Andy Shevchenko
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