Re: SM501: core (mfd) driver

[Arjan van de Ven]

On Wed, 2006-12-13 at 17:51 +0000, Ben Dooks wrote:
> > > +
> > > +	writel(mode, sm->regs + SM501_POWER_MODE_CONTROL);
> > > +
> > > +	dev_dbg(sm->dev, "gate %08lx, clock %08lx, mode %08lx\n",
> > > +		gate, clock, mode);
> > > +
> > > +	msleep(16);
> > 
> > you're missing a PCI posting flush here
> > (if you don't know what this is please ask)
> 
> Is this a read from an device register to cause the PCI writes
> to happen?

yup

>  Would reading SM501_POWER_MODE_CONTROL be ok, or does
> it require a different register?

any register is ok, you can read the same one just fine.


greetings,
   Arjan van de Ven
-- 
if you want to mail me at work (you don't), use arjan (at) linux.intel.com
Test the interaction between Linux and your BIOS via http://www.linuxfirmwarekit.org

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/