On Wed, Oct 31, 2012 at 10:38:29AM +0100, Rafael J. Wysocki wrote: > From: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx> > > With ACPI 5 we are starting to see devices that don't natively support > discovery but can be enumerated with the help of the ACPI namespace. > Typically, these devices can be represented in the Linux device driver > model as platform devices or some serial bus devices, like SPI or I2C > devices. > > Since we want to re-use existing drivers for those devices, we need a > way for drivers to specify the ACPI IDs of supported devices, so that > they can be matched against device nodes in the ACPI namespace. To > this end, it is sufficient to add a pointer to an array of supported > ACPI device IDs, that can be provided by the driver, to struct device. > > Moreover, things like ACPI power management need to have access to > the ACPI handle of each supported device, because that handle is used > to invoke AML methods associated with the corresponding ACPI device > node. The ACPI handles of devices are now stored in the archdata > member structure of struct device whose definition depends on the > architecture and includes the ACPI handle only on x86 and ia64. Since > the pointer to an array of supported ACPI IDs is added to struct > device_driver in an architecture-independent way, it is logical to > move the ACPI handle from archdata to struct device itself at the same > time. This also makes code more straightforward in some places and > follows the example of Device Trees that have a poiter to struct > device_node in there too. > > This changeset is based on Mika Westerberg's work. > > Signed-off-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx> > Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx> > --- > arch/ia64/include/asm/device.h | 3 --- > arch/x86/include/asm/device.h | 3 --- > drivers/acpi/glue.c | 14 ++++++-------- > include/acpi/acpi_bus.h | 2 +- > include/linux/device.h | 4 ++++ > 5 files changed, 11 insertions(+), 15 deletions(-) The driver core pieces look fine to me: Acked-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
