Re: [PATCH 6/6] Clocklib: use correct name for 3,6MHz clock

[Dmitry <dbaryshkov@gmail.com>]

Hi,

2008/4/8, Russell King <rmk+lkml@arm.linux.org.uk>:
> On Tue, Apr 08, 2008 at 01:52:41PM +0400, Dmitry wrote:
>  > 2008/4/8, Andrew Morton <akpm@linux-foundation.org>:
>  > > On Thu, 3 Apr 2008 17:24:11 +0400
>  > >  Dmitry Baryshkov <dbaryshkov@gmail.com> wrote:
>  > >
>  > >  > Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com>
>  > >  > ---
>  > >  >  arch/arm/common/sa1111.c |    2 +-
>  > >  >  1 files changed, 1 insertions(+), 1 deletions(-)
>  > >  >
>  > >  > diff --git a/arch/arm/common/sa1111.c b/arch/arm/common/sa1111.c
>  > >  > index eb06d0b..282a4d9 100644
>  > >  > --- a/arch/arm/common/sa1111.c
>  > >  > +++ b/arch/arm/common/sa1111.c
>  > >  > @@ -627,7 +627,7 @@ __sa1111_probe(struct device *me, struct resource *mem, int irq)
>  > >  >       if (!sachip)
>  > >  >               return -ENOMEM;
>  > >  >
>  > >  > -     sachip->clk = clk_get(me, "GPIO27_CLK");
>  > >  > +     sachip->clk = clk_get(me, "3_6MHz_CLK");
>  > >  >       if (!sachip->clk) {
>  > >  >               ret = PTR_ERR(sachip->clk);
>  > >  >               goto err_free;
>  > >
>  > >
>  > > Again, there's just not enough information for us (well: me) to be able to
>  > >  evaluate this patch.
>  > >
>  > >  For example, if the current name is "incorrect" then why shouldn't we fix
>  > >  it in 2.6.25?  2.6.24?  etc.
>  > >
>  > >
>  >
>  > The name GPIO27_CLK came from sa1100 arm sub-arch. There the 3.6 MHz
>  > clock was provided via GPIO 27. The PXA clocks code have copied the
>  > name for the clock (as it's used by sa1111 companion chip that can be
>  > used with both sa1100 and pxa). However on pxa the 3.6MHz clock is
>  > provided by different PIN. So the name GPIO27_CLK is misleading and
>  > incorrect for PXA.
>
>
> So... what is the correct name.  Bear in mind what I said in the previous
>  reply this evening - which says that it should be the name used by the
>  SA1111.  Look in the data sheet - the pin itself to which the 3.6MHz
>  clock is supplised will have a name.  That's the name which should be
>  used.

I use the same pin/clock for the tc6393xb driver. And I'm pretty sure
the datasheets won't agree on the name of the pin. Which name should I
use?


-- 
With best wishes
Dmitry