On Fri, 20 Oct 2017 07:11:01 +0200,
Vinod Koul wrote:
>
> On Thu, Oct 19, 2017 at 09:40:06AM +0200, Takashi Iwai wrote:
> > On Thu, 19 Oct 2017 05:03:18 +0200,
> > Vinod Koul wrote:
> > > +
> > > +config SOUNDWIRE_BUS
> > > + tristate
> > > + default SOUNDWIRE
> > > +
> >
> > Does it make sense to be tristate?
> > Since CONFIG_SOUNDWIRE is a bool, the above would be also only either
> > Y or N. If it's Y and others select M, it'll be still Y.
>
> hmmm good point. I think would make sense to make SOUNDWIRE as tristate too,
> just like SOUND :)
It's one option. Another would be to simply drop the "default" line.
> > > + * The match is done by comparing the mfg_id and part_id from the
> > > + * struct sdw_device_id. class_id is unused, as it is a placeholder
> > > + * in MIPI Spec.
> > > + */
> > > +static const struct sdw_device_id *
> > > +sdw_get_device_id(struct sdw_slave *slave, struct sdw_driver *drv)
> > > +{
> > > + const struct sdw_device_id *id = drv->id_table;
> > > +
> > > + while (id && id->mfg_id) {
> > > + if (slave->id.mfg_id == id->mfg_id &&
> > > + slave->id.part_id == id->part_id) {
> >
> > Please indentation properly.
>
> what do you advise?
>
> if (slave->id.mfg_id == id->mfg_id &&
> slave->id.part_id == id->part_id) {
>
> would mean below one is at same indent. Some people use:
>
> if (slave->id.mfg_id == id->mfg_id &&
> slave->id.part_id == id->part_id) {
>
> Is it Documented anywhere...
This is a matter of taste. The latter is the way Emacs or indent does
as default.
> > > --- a/include/linux/mod_devicetable.h
> > > +++ b/include/linux/mod_devicetable.h
> > > @@ -228,6 +228,13 @@ struct hda_device_id {
> > > unsigned long driver_data;
> > > };
> > >
> > > +struct sdw_device_id {
> > > + __u16 mfg_id;
> > > + __u16 part_id;
> > > + __u8 class_id;
> > > + kernel_ulong_t driver_data;
> >
> > Better to think of alignment.
>
> sorry not quite clear, do you mind elaborating which ones to align?
kernel_ulong_t may be aligned to 4 or 8 bytes, depending on
architecture, so there can be a hole between class_id and driver_data.
It's not an ABI, so we don't have to care too much, but it's still
something exposed, hence better to be conscious about alignment.
Takashi
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