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

Rafael J. Wysocki
2016-09-28T21:32:59Z

Hi,

On Fri, Sep 23, 2016 at 4:57 PM, Mika Westerberg
<mika.westerberg@linux.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