Re: PATA hotplug

[Alan Cox <alan@lxorguk.ukuu.org.uk>]

> My target is an embedded SoC which has PATA autodetect support.

Nice.

> First, I need to convert the vendor-supplied legacy IDE driver to a
> PATA platform driver. Can you recommend best-of-breed existing PATA
> drivers to use as a reference for this work? 

pata_platform is a dumb platform device driver and shows how to interface
to the platform layer. I'm guessing your hardware is a bit smarter in
which case you probably want to use pata_platform as a reference for
setting up platform class interfaces with arbitary port mappings and
something like pata_amd to see how the various cable detect, dma and pio
timing functions can be used.

If you've got hardware which supports master/slave but only single timing
registers take a look at the code in pata_oldpiix and the
oldpiix_qc_issue_prot function for how to do timing switching according
to the device, and pata_atiixp is a worked example of how to do clock
switching on the start/end of DMA operations.

Any other questions just ask