On Monday, November 12, 2012 12:51:32 PM Rafael J. Wysocki wrote: > 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. Updated series, taking the Mika's feedback into account, follows. There are bug fixes in [1/3], [2/3] is unchanged and the new [3/3] is a replacement, done in a different way because of some ACPICA limitations I didn't realize before. 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
