[RFC][PATCH v2 0/2] SPI support for fsl_soc and mpc832x_rdb

[Anton Vorontsov <avorontsov@ru.mvista.com>]

Hi all,

Thanks for the previous review! Here is updated version, also needs
your comments.

Changelog:

o Device tree:
  - cosmetic cleanups (@01 -> @1);
  - device-id renamed to fsl,device-id;
  - removed max-chipselect and sysclk properties from spi node;
  - removed chipselect property from mmc node, now reg property
    used for this purpose, thereby address-cells and size-cells
    added to the spi node;
  - other non-mandatory (device-id, device_type, compatible, ...)
    properties removed from mmc node, today board file is using
    of_find_node_by_name(), instead of of_find_compatible_node();
  - "qe" mode renamed to "cpu-qe".

o board file <-> fsl_soc interaction
  - fsl_soc no longer scans for SPI nodes in the arch initcall.
    Also it's no longer exports any global variables. Instead, it's
    export fsl_spi_init function now, which accepts pointer to the
    fsl_spi_board_info structure;
  - board file fills fsl_spi_board_info structure and issues
    fsl_spi_init(), which register SPI devices and SPI board infos.
    Various sanity checks also perfromed.

I'd want to note that if spi_mpc83xx will be converted to
of_platform_driver then the scheme described above will not
work anymore, and I'll have to revert back ugly hacks:
global variables for activate/deactivate_cs functions. I see
no other options.


Thanks!

-- 
Anton Vorontsov
email: cbou@mail.ru
backup email: ya-cbou@yandex.ru
irc://irc.freenode.net/bd2