Re: [PATCH][MIPS] add GT641xx timer0 clockevent

[Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>]

On Tue, 23 Oct 2007 10:06:45 +0900 (JST)
Atsushi Nemoto <anemo@mba.ocn.ne.jp> wrote:

> On Tue, 23 Oct 2007 09:55:55 +0900, Yoichi Yuasa 
> <yoichi_yuasa@tripeaks.co.jp> wrote:
> > > These clockevent routines are always called with interrupt disabled,
> > > so I suppose those spin_lock_irqsave/spin_unlock_irqrestore pairs can
> > > be omitted. (or this timer can be used on SMP?)
> > 
> > Yes, it can be used on Malta(SMP).
> 
> Then spin_lock()/spin_unlock() is enough, isn't it?

The timer control register(GT_TC_CONTROL_OFS) is shared with 4 timers.
The 4 timers are connected with separate IRQ. 

clockevents_program_event() and clockevents_set_mode() can be called from
anywhere(in the kernel).

I think that it's necessary for it.

Yoichi