On Sat, Aug 16, 2014 at 09:53:50AM +0300, Mika Westerberg wrote: > The recent publication of the ACPI 5.1 specification [1] 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 [2]. > > An ACPI Device Properties UUID has been defined [3] 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 2 example drivers that were previously Device Tree aware that > can now be used with either Device Tree or ACPI Device Properties. The > both drivers use an arbitrary _HID. > > This has been tested on Minnowboard with relevant parts of the modified > DSDT at the end of this email. > > 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. > > [1] http://www.uefi.org/sites/default/files/resources/ACPI_5_1release.pdf > [2] http://www.uefi.org/sites/default/files/resources/_DSD-implementation-guide-toplevel.htm > [3] http://www.uefi.org/sites/default/files/resources/_DSD-device-properties-UUID.pdf > > Aaron Lu (3): > of: Add property_ops callback for devices with of_node > gpiolib: add API to get gpio desc and flags > Input: gpio_keys_polled - Make use of device property API > > Max Eliaser (1): > leds: leds-gpio: Make use of device property API > > Mika Westerberg (4): > ACPI: Add support for device specific properties > ACPI: Document ACPI device specific properties > mfd: Add ACPI support > gpio: sch: Consolidate core and resume banks > > Rafael J. Wysocki (1): > Driver core: Unified device properties interface for platform firmware One issue I noticed with the series: the new read functions, when given an integer type, don't appear to do any range-checking to make sure the returned value falls within the range of that type. They should do so, and return -EOVERFLOW if so. And the documentation of the new functions should note that explicitly as an error case. With that fixed: Reviewed-by: Josh Triplett <josh@xxxxxxxxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
