On Mon, Apr 04, 2011, Hector Oron wrote:
> static const char *supported_generic_subarches[] = {
> "dove",
matches mach-dove, no plat-dove
> "omap",
matches plat-omap, but no mach-omap (mach-omap1 supports OMAP1xxx and
mach-omap2 supports OMAP 2+ -- 2xxx, 3xxx, 4xxx).
> "omap4",
doesn't match any plat or mach dir
> "mx51",
neither does this
> and machine mappings has:
> { "Freescale MX51 Babbage Board", "imx5" }, /* iMX51 reference hardware.
> */
plat-imx5 is a name which was used in the Freescale BSP which also used
mach-imx51 in the past.
> Would it break 'others' configurations if we set/change 'mx5' as
> subarchitecture, which seems to be the most reasonable one at the
> moment.
I think you really want to go for mx5; as this was never supported in
Debian so far, that should be ok; if you need to change existing
imx5/mx51 bits, poke the Ubuntu folks (or I can forward) as it might
impact them.
I've commented in Debian #612376 on why we want mx5; quoting myself:
"""Currently, the upstream
kernel doesn't support building both i.MX51 and i.MX53 in the same
kernel but the Linux Linaro branch and the Freescale BSP kernel do;
also, I think the patches by Eric Miao allowing this (runtime phys
offset patches -- i.MX51 has phys RAM at 0x90000000 while i.MX53 has it
at 0x70000000, see arch/arm/mach-mx5/Makefile.boot) are pending in
Sacha Hauer's tree, but I'm not entirely sure.
Technically, mx5 would only support mx51 right now, but would soon
allow supporting mx53 as well, notably for mx53loco / quickstart boards
which I bet a bunch of Debian ARM users will get."""
In the kernel, there's plat-mxc, mach-imx, mach-mx3 and mach-mx5. I
expect Debian will want to support popular mach-mx5 hardware for i.MX51
(Efika MX Smartbook and Smarttop) and i.MX53 (Freescale MX53LOCO /
Quickstart board).
Also note that the currently supported subarches in Debian ARM are:
- iop32x (matches mach-iop32x, not plat-iop -- there are some other
mach-iop*)
- kirkwood (matches mach-kirkwood, no plat-kirkwood I think it's
plat-orion)
- ixp4xx (matches mach-ixp4xx, no plat-ixp4xx -- not sure what it uses)
- orion5x (matches mach-orion5x, no plat-orion5x I think it's also
plat-orion)
- versatile (matches mach-versatile and plat-versatile)
So mach-* has been very consistent in Debian ARM kernel flavors.
Cheers,
--
Loïc Minier
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