linux-kernel - Re: [PATCH 0/5] ACPI / gpio: Updates to properties

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Date:   Wed, 28 Sep 2016 23:32:46 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Linus Walleij <linus.walleij@...aro.org>,
        Alexandre Courbot <gnurou@...il.com>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/5] ACPI / gpio: Updates to properties

Hi,

On Fri, Sep 23, 2016 at 4:57 PM, Mika Westerberg
<mika.westerberg@...ux.intel.com> wrote:
> Hi,
>
> This series brings couple of useful GPIO related properties from Device
> Tree to ACPI _DSD device properties:
>
>   - Names for GPIO lines
>   - GPIO hogging
>   - Holes in GPIO property lists
>
> We are using these to get Intel Galileo better supported in the mainline
> kernel (but these may be useful for other boards as well). For example SPI
> chip select on Galileo is connected to a GPIO line so we need to be able to
> describe it in ACPI, and at the same time allow native chip selects.
>
> GPIO hogging can be used to set initial state of certain GPIOs available on
> the headers regardless of the BIOS settings (which may be wrong as it knows
> nothing about which devices have been connected).
>
> Mika Westerberg (5):
>   ACPI / documentation: Use recommended name in GPIO property names
>   ACPI / gpio: Add support for naming GPIOs
>   ACPI / gpio: Add hogging support
>   ACPI / property: Allow holes in reference properties
>   ACPI / gpio: Allow holes in list of GPIOs for a device
>
>  Documentation/acpi/gpio-properties.txt |  72 ++++++++++++++--
>  drivers/acpi/property.c                | 116 +++++++++++++++++++-------
>  drivers/gpio/gpiolib-acpi.c            | 147 ++++++++++++++++++++++++++++++---
>  include/linux/acpi.h                   |   3 +
>  4 files changed, 292 insertions(+), 46 deletions(-)

I would like to tackle patches [1/5] and [4/5] first, as they are core
patches and the rest is against gpiolib-acpi.

Moreover, the documentation patch [1/5] looks like immediately applicable to me.

Thanks,
Rafael