Re: [PATCH 18/20] clocksource / acpi: Add macro CLOCKSOURCE_ACPI_DECLARE

[Hanjun Guo]

Hi Linus,

Sorry for the late reply.

On 2014å01æ22æ 16:26, Linus Walleij wrote:
> On Fri, Jan 17, 2014 at 1:25 PM, Hanjun Guo <hanjun.guo@xxxxxxxxxx> wrote:
>
> > From: Amit Daniel Kachhap <amit.daniel@xxxxxxxxxxx>
> >
> > This macro does the same job as CLOCKSOURCE_OF_DECLARE. The device
> > name from the ACPI timer table is matched with all the registered
> > timer controllers and matching initialisation routine is invoked.
> >
> > Signed-off-by: Amit Daniel Kachhap <amit.daniel@xxxxxxxxxxx>
> > Signed-off-by: Hanjun Guo <hanjun.guo@xxxxxxxxxx>
> Actually I have a fat patch renaming CLOCKSOURCE_OF_DECLARE()
> to TIMER_OF_DECLARE() and I think this macro, if needed, should
> be named TIMER_ACPI_DECLARE().
>
> The reason is that "clocksource" is a Linux-internal name and this
> macro pertains to the hardware name in respective system
> description type.

That make sense to me too, I will update in next version if
this patch is still needed.

> > +#ifdef CONFIG_ACPI
> > +#define CLOCKSOURCE_ACPI_DECLARE(name, compat, fn)                     \
> > +       static const struct acpi_device_id __clksrc_acpi_table_##name   \
> > +               __used __section(__clksrc_acpi_table)                   \
> > +                = { .id = compat,                              \
> > +                    .driver_data = (kernel_ulong_t)fn }
> > +#else
> > +#define CLOCKSOURCE_ACPI_DECLARE(name, compat, fn)
> > +#endif
> This hammers down the world to compile one binary for ACPI
> and one binary for device tree. Maybe that's fine, I don't know.

This is a problem we can have some discussion on it.
I prefer mutually exclusive ACPI and DT support.

Thanks
Hanjun

--
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/