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    SubjectRe: Fwd: Hid over I2C and ACPI interaction
    On Thu, Jul 05, 2012 at 03:01:57PM +0800, Zhang Rui wrote:
    > +Note that although these are ACPI devices, we prefer to use PnP drivers
    > for them,
    > +this is because:
    > +1. all the non-ACPI-predefined Devices are exported as PnP devices as
    > well
    > +2. PnP bus is a well designed bus. Probing via PnP layer saves a lot of
    > work
    > + for the device driver, e.g. getting & parsing ACPI resources.

    (Nice BKM, thanks for sharing)

    I have few questions about using PnP drivers instead of pure ACPI drivers.

    ACPI 5.0 defined some new resources, for example "Fixed DMA descriptor"
    that has information about the request line + channel for the device to
    use. Hovewer, PnP drivers pass resources as 'struct resource', which
    basically only has start and end - how do you represent all this new stuff
    using 'struct resource'?

    Or should we use acpi_walk_resources() where 'struct resource' is not
    suitable?


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