SPI geom_flashmap/fdt_slicer support, FDT 'resets=' support and a move of ohci_fdt.c

[Warner Losh]

> On Jan 27, 2016, at 5:20 PM, Steve Kiernan <stevek at juniper.net> wrote:
> 
> On Sat, 23 Jan 2016 07:18:04 +0200
> Stanislav Galabov <sgalabov at gmail.com> wrote:
> 
>> It looks like only part of the original patch I submitted made it into head
>> (only the mx25l part).
>> We also need to change sys/conf/files as Steve pointed out, as well as
>> sys/geom/geom_flashmap.c:
>> https://bz-attachments.freebsd.org/attachment.cgi?id=165546
> 
> One other thing that needs to be considered. The nand driver has an ioctl
> for getting chip parameters (see chip_param_io structure in
> sys/dev/nand/nand_dev.h) and geom_flashmap only allows for
> NAND_IO_GET_CHIP_PARAM to be passed to the provider. However, the CFI and
> SPI devices do not implement this and they probably should not as-is.
> Something more generic to flash devices that are handled by geom_flashmap
> is probably in order.

The different chip parameters shouldn’t be done through an ioctl with geom.
It should be done with geom attributes. We should implement a sensible set for
all three and have geom_flashmap use those instead of the ioctl.

Warner

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