On Thu, 2018-03-29 at 06:02:46 UTC, Stewart Smith wrote: > time_init() will set up tb_ticks_per_usec based on reality. > time_init() is called *after* udbg_init_opal_common() during boot. > > from arch/powerpc/kernel/time.c: > unsigned long tb_ticks_per_usec = 100; /* sane default */ > > Currently, all powernv systems have a timebase frequency of 512mhz > (512000000/1000000 == 0x200) - although there's nothing written > down anywhere that I can find saying that we couldn't make that > different based on the requirements in the ISA. > > So, we've been (accidentally) thwacking the (currently) correct > (for powernv at least) value for tb_ticks_per_usec earlier than > we otherwise would have. > > The "sane default" seems to be adequate for our purposes between > udbg_init_opal_common() and time_init() being called, and if it isn't, > then we should probably be setting it somewhere that isn't hvc_opal.c! > > Signed-off-by: Stewart Smith <stew...@linux.ibm.com>
Applied to powerpc next, thanks. https://git.kernel.org/powerpc/c/447808bf500a7cc92173266a59f8a4 cheers