From: Mika Westerberg <mika.westerberg@linux.intel.com>
To: Flavio Suligoi <f.suligoi@asem.it>
Cc: "Rafael J . Wysocki" <rjw@rjwysocki.net>,
Len Brown <lenb@kernel.org>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
linux-acpi@vger.kernel.org, linux-gpio@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] docs: ACPI: enumeration: add PCI hierarchy representation
Date: Fri, 20 Nov 2020 14:28:05 +0200 [thread overview]
Message-ID: <20201120122805.GT2495@lahna.fi.intel.com> (raw)
In-Reply-To: <20201120111125.78296-1-f.suligoi@asem.it>
On Fri, Nov 20, 2020 at 12:11:25PM +0100, Flavio Suligoi wrote:
> For "fixed" PCI devices, such as chips directly soldered
> on the main board (ethernet, Wi-Fi, serial ports, etc.),
> it is possible to find an ACPI enumeration.
>
> This allows to add useful properties to these devices.
> Just for an example: the property "gpio-line-names" can be
> added to the pins of a GPIO expander on the PCI bus.
>
> In order to find the ACPI name of a PCI device, it's necessary
> to disassemble the BIOS ACPI tables (in particular the DSDT)
> and also to analyze the PCI bus topology of the board.
>
> This patch, with a practical example, show how to do this.
>
> Signed-off-by: Flavio Suligoi <f.suligoi@asem.it>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
next prev parent reply other threads:[~2020-11-20 12:28 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-20 11:11 [PATCH v2] docs: ACPI: enumeration: add PCI hierarchy representation Flavio Suligoi
2020-11-20 12:28 ` Mika Westerberg [this message]
2020-11-20 15:00 ` Andy Shevchenko
2020-11-20 15:26 ` Flavio Suligoi
2020-11-23 17:02 ` Rafael J. Wysocki
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