On Sun, Dec 8, 2013 at 3:44 AM, Arnd Bergmann arnd@arndb.de wrote:
I'd agree as soon as someone can convince me that we actually want ACPI support in the kernel for ARM64 servers. As far as I'm concerned it's quite possible that the people who have worked on this for the past couple of years behind closed doors know what they are doing and it will all be good, but it's also possible that it turns into a huge trainwreck once we see multiple implementations that have fundamentally incompatible requirements regarding what they want from ACPI and we end up not doing it at all.
Here is a piece I've noticed very clearly in the GPIO subsystem:
ACPI is persued for x86 servers, desktops by all vendors. For embedded x86 it is persued by Intel *ONLY*. We still get several embedded GPIO drivers for x86 that use ISA-style portmapped I/O probing (!)
So, hehe, in init/Kconfig there is still the much-debated Kconfig option "EMBEDDED"...
Should ACPI for ARM64 be depends on !EMBEDDED?
Yours, Linus Walleij