Re: [RFC PATCH 0/6] ACPI: ACPI 5.0 device enumeration proposal

[Mika Westerberg]

On Fri, Sep 28, 2012 at 03:37:43PM +0800, Zhang Rui wrote:
> 
> the main idea is that, for Serial Buses like I2C and SPI, we enumerate
> the controller as a platform device, and then enumerate the slaves via
> i2c/spi_register_board_info. And then, when the controller is really
> probed and enabled in the platform driver, the SPI/I2C bus code will
> enumerate I2C/SPI slaves automatically.
> And for the other devices, we will enumerate all of them as platform
> devices, which is not covered in this patch set yet.

Can you show some example how we could use this new code for example with
an existing I2C/SPI slave driver? Let's say the device uses few GPIOs, one
for interrupt and other for triggering firmware download. In addition to
that it needs a special parameters that can be extracted running the "_DSM"
method of the device.

Normally the driver would get this stuff from the platform data or from
Device Tree but how it is done with these patches?
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