Re: [RFC PATCH v2 00/16] Add ACPI _DSD and unified device properties support

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On Tue, Sep 16, 2014 at 4:52 AM, Mika Westerberg
<mika.westerberg@xxxxxxxxxxxxxxx> wrote:
> This is a second revision of the patches first submitted here [1].
>
> The recent publication of the ACPI 5.1 specification [2] adds a reserved name
> for Device Specific Data (_DSD, Section 6.2.5). This mechanism allows for
> passing arbitrary hardware description data to the OS. The exact format of the
> _DSD data is specific to the UUID paired with it [3].
>
> An ACPI Device Properties UUID has been defined [4] to provide a format
> compatible with existing device tree schemas. The purpose for this was to
> allow for the reuse of the existing schemas and encourage the development
> of firmware agnostic device drivers.
>
> This series accomplishes the following (as well as some other dependencies):
>
>  * Add _DSD support to the ACPI core
>    This simply reads the UUID and the accompanying Package
>
>  * Add ACPI Device Properties _DSD format support
>    This understands the hierarchical key:value pair structure
>    defined by the Device Properties UUID
>
>  * Add a unified device properties API with ACPI and OF backends
>    This provides for the firmware agnostic device properties
>    Interface to be used by drivers
>
>  * Provides 3 example drivers that were previously Device Tree aware that
>    can now be used with either Device Tree or ACPI Device Properties. The
>    drivers use "PRP0001" as their _HID which means that the match should be
>    done using driver's .of_match_table instead.
>
> The patch series has been tested on Minnoboard and Minnowboard MAX and the
> relevant part of DSDTs are at the end of this cover letter.
>
> This series does not provide for a means to append to a system DSDT. That
> will ultimately be required to make the most effective use of the _DSD
> mechanism. Work is underway on that as a separate effort.
>
> Most important changes to the previous RFC version:
>
>   * Added wrapper functions for most used property types
>   * Return -EOVERFLOW in case integer would not fit to a type
>   * Dropped dev_prop_ops
>   * We now have dev_node_xxx() functions to access firmware node
>     properties without dev pointer
>   * The accessor function names try to be close to their corresponding of_*
>     counterpart
>   * Tried to have a bit better examples in the documentation patch
>   * gpiolib got support for _DSD and also it now understand firmware node
>     properties with dev_node_get_named_gpiod() that requests the GPIO
>     properly.
>   * Support for "PRP0001" _HID/_CID. This means that the match should be
>     done using driver .of_match_table instead.
>   * Add unified property support for at25 SPI eeprom driver as well.
>
> [1] https://lkml.org/lkml/2014/8/17/10
> [2] http://www.uefi.org/sites/default/files/resources/ACPI_5_1release.pdf
> [3] http://www.uefi.org/sites/default/files/resources/_DSD-implementation-guide-toplevel.htm
> [4] http://www.uefi.org/sites/default/files/resources/_DSD-device-properties-UUID.pdf
>
> Aaron Lu (2):
>   input: gpio_keys_polled - Add support for GPIO descriptors
>   input: gpio_keys_polled - Make use of device property API
>
> Max Eliaser (2):
>   leds: leds-gpio: Make use of device property API
>   leds: leds-gpio: Add ACPI probing support
>
> Mika Westerberg (11):
>   ACPI: Add support for device specific properties
>   ACPI: Allow drivers to match using Device Tree compatible property
>   ACPI: Document ACPI device specific properties
>   mfd: Add ACPI support
>   gpio / ACPI: Add support for _DSD device properties
>   gpio: Add support for unified device properties interface
>   gpio: sch: Consolidate core and resume banks
>   leds: leds-gpio: Add support for GPIO descriptors
>   input: gpio_keys_polled - Add ACPI probing support
>   misc: at25: Make use of device property API
>   misc: at25: Add ACPI probing support
>
> Rafael J. Wysocki (1):
>   Driver core: Unified device properties interface for platform firmware
>

I'm good with the LEDs change, please go ahead with my Ack
Acked-by: Bryan Wu <cooloney@xxxxxxxxx>

Thanks,
-Bryan


>  Documentation/acpi/enumeration.txt        |  27 ++
>  Documentation/acpi/properties.txt         | 410 +++++++++++++++++++++
>  drivers/acpi/Makefile                     |   1 +
>  drivers/acpi/internal.h                   |   6 +
>  drivers/acpi/property.c                   | 584 ++++++++++++++++++++++++++++++
>  drivers/acpi/scan.c                       |  93 ++++-
>  drivers/base/Makefile                     |   2 +-
>  drivers/base/property.c                   | 196 ++++++++++
>  drivers/gpio/devres.c                     |  35 ++
>  drivers/gpio/gpio-sch.c                   | 293 ++++++---------
>  drivers/gpio/gpiolib-acpi.c               |  78 +++-
>  drivers/gpio/gpiolib.c                    |  85 ++++-
>  drivers/gpio/gpiolib.h                    |   7 +-
>  drivers/input/keyboard/gpio_keys_polled.c | 169 +++++----
>  drivers/leds/leds-gpio.c                  | 188 +++++-----
>  drivers/mfd/mfd-core.c                    |  40 ++
>  drivers/misc/eeprom/at25.c                |  41 +--
>  drivers/of/base.c                         | 188 ++++++++++
>  include/acpi/acpi_bus.h                   |   8 +
>  include/linux/acpi.h                      |  90 ++++-
>  include/linux/gpio/consumer.h             |   7 +
>  include/linux/gpio_keys.h                 |   3 +
>  include/linux/leds.h                      |   1 +
>  include/linux/mfd/core.h                  |   3 +
>  include/linux/of.h                        |  37 ++
>  include/linux/property.h                  | 193 ++++++++++
>  26 files changed, 2377 insertions(+), 408 deletions(-)
>  create mode 100644 Documentation/acpi/properties.txt
>  create mode 100644 drivers/acpi/property.c
>  create mode 100644 drivers/base/property.c
>  create mode 100644 include/linux/property.h
>
> DSDT modifications for Minnowboard (for leds-gpio.c and gpio_keys_polled.c)
> ---------------------------------------------------------------------------
>
>     Scope (\_SB.PCI0.LPC)
>     {
>         Device (LEDS)
>         {
>             Name (_HID, "PRP0001")
>
>             Name (_CRS, ResourceTemplate () {
>                 GpioIo (Exclusive, PullDown, 0, 0, IoRestrictionOutputOnly,
>                         "\\_SB.PCI0.LPC", 0, ResourceConsumer) {10}
>                 GpioIo (Exclusive, PullDown, 0, 0, IoRestrictionOutputOnly,
>                         "\\_SB.PCI0.LPC", 0, ResourceConsumer) {11}
>             })
>
>             Name (_DSD, Package () {
>                   ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
>                   Package () {
>                       Package () {"compatible", Package () {"gpio-leds"}},
>                   }
>             })
>
>             Device (LEDH)
>             {
>                 Name (_DSD, Package () {
>                     ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
>                     Package () {
>                         Package () {"label", "Heartbeat"},
>                         Package () {"gpios", Package () {^^LEDS, 0, 0, 0}},
>                         Package () {"linux,default-trigger", "heartbeat"},
>                         Package () {"linux,default-state", "off"},
>                         Package () {"linux,retain-state-suspended", 1},
>                     }
>                 })
>             }
>
>             Device (LEDM)
>             {
>                 Name (_DSD, Package () {
>                     ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
>                     Package () {
>                         Package () {"label", "MMC0 Activity"},
>                         Package () {"gpios", Package () {^^LEDS, 1, 0, 0}},
>                         Package () {"linux,default-trigger", "mmc0"},
>                         Package () {"linux,default-state", "off"},
>                         Package () {"linux,retain-state-suspended", 1},
>                     }
>                 })
>             }
>         }
>
>         Device (BTNS)
>         {
>             Name (_HID, "PRP0001")
>
>             Name (_CRS, ResourceTemplate () {
>                 GpioIo (Exclusive, PullUp, 0, 0, IoRestrictionInputOnly,
>                         "\\_SB.PCI0.LPC", 0, ResourceConsumer) {0, 1, 2, 3}
>             })
>
>             Name (_DSD, Package () {
>                 ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
>                 Package () {
>                     Package () {"compatible", Package () {"gpio-keys-polled"}},
>                     Package () {"poll-interval", 100},
>                     Package () {"autorepeat", 1}
>                 }
>             })
>
>             Device (BTN0)
>             {
>                 Name (_DSD, Package () {
>                     ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
>                     Package () {
>                         Package () {"linux,code", 105},
>                         Package () {"linux,input-type", 1},
>                         Package () {"gpios", Package () {^^BTNS, 0, 0, 1}},
>                     }
>                 })
>             }
>
>             Device (BTN1)
>             {
>                 Name (_DSD, Package () {
>                     ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
>                     Package () {
>                         Package () {"linux,code", 108},
>                         Package () {"linux,input-type", 1},
>                         Package () {"gpios", Package (4) {^^BTNS, 0, 1, 1}},
>                     }
>                 })
>             }
>
>             Device (BTN2)
>             {
>                 Name (_DSD, Package () {
>                     ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
>                     Package () {
>                         Package () {"linux,code", 103},
>                         Package () {"linux,input-type", 1},
>                         Package () {"gpios", Package () {^^BTNS, 0, 2, 1}},
>                     }
>                 })
>             }
>
>             Device (BTN3)
>             {
>                 Name (_DSD, Package () {
>                     ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
>                     Package ()
>                     {
>                         Package () {"linux,code", 106},
>                         Package () {"linux,input-type", 1},
>                         Package () {"gpios", Package (4) {^^BTNS, 0, 3, 1}},
>                     }
>                 })
>             }
>         }
>     }
>
> DSDT modifications for Minnowboard MAX (for at25.c)
> ---------------------------------------------------
>
>     Scope (\_SB.SPI1)
>     {
>         Device (AT25)
>         {
>             Name (_HID, "PRP0001")
>             Method (_CRS, 0, Serialized) {
>                 Name (UBUF, ResourceTemplate () {
>                     SpiSerialBus (0x0000, PolarityLow, FourWireMode, 0x08,
>                         ControllerInitiated, 0x007A1200, ClockPolarityLow,
>                         ClockPhaseSecond, "\\_SB.SPI1",
>                         0x00, ResourceConsumer)
>                 })
>                 Return (UBUF)
>             }
>
>             Name (_DSD, Package () {
>                 ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
>                 Package () {
>                     Package () {"compatible", Package () {"atmel,at25"}},
>                     Package () {"size", 1024},
>                     Package () {"pagesize", 32},
>                     Package () {"address-width", 16},
>                 }
>             })
>
>             Method (_STA, 0, NotSerialized)
>             {
>                 Return (0xF)
>             }
>         }
>     }
> --
> 2.1.0
>
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