On Saturday, November 03, 2012 09:46:30 AM Mika Westerberg wrote: > Hi, > > With ACPI 5 we can now describe how devices are connected to their bus > using new resources: SPISerialBus and I2CSerialBus. Also it is now possible > to add GPIO connections for the devices with the help of GpioIO and GpioInt > resources. > > This series adds support for these new resources. > > The series based on the ACPI 5 enumeration support patches that are available > on Rafael's linux-next branch: > > git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next > > Specifically patches from this thread: > > https://lkml.org/lkml/2012/10/31/154 > > Since these patches depend on the above patches on Rafael's linux-next branch > I suggest that these be merged via that branch, if there are no objections. > > The series follows the Device Tree way so that it would be easy to add ACPI > support for the existing SPI and I2C drivers if one is familiar how the > corresponding DT support is done. > > For GPIO we introduce a function that maps between ACPI GPIO numbers and Linux > ones - acpi_get_gpio(). > > SPI slave devices gets enumerated automatically if the master device has > master->dev.acpi_handle set (this is analogous to master->dev.of_mode). The > platform bus code in Rafael's branch assigns the ACPI handle to the master > device. > > I2C slave devices can be enumerated by calling acpi_i2c_register_devices() in > the adapter driver. Following the previous discussion, the patches below move some ACPI resources parsing code from drivers/pnp/pnpacpi/rsparser.c to a new file drivers/acpi/resource.c and reformat it so that it can be used by other subsystems (patch [1/3]), convert the new ACPI platform devices creation code to use the routines in drivers/acpi/resource.c instead of doing its own resource parsing (patch [2/3]) and make the ACPI namespace scan attach a list of _CRS resources to each struct acpi_device it creates, where applicable (patch [3/3] - the ACPI platform device code is converted to use that instead of executing _CRS by itself via acpi_walk_resources()). The patchset is on top of the current linux-pm.git/linux-next branch and has been tested somewhat. Please let me know if you find any problems in it. Thanks, Rafael -- I speak only for myself. Rafael J. Wysocki, Intel Open Source Technology Center. -- 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
