RE: [PATCH v4 2/3] i3c: move i3c_device_match_id to device.c and export it

Vitor Soares
2019-07-12T16:22:12Z

Hi Boris,

From: Boris Brezillon <boris.brezillon@collabora.com>
Date: Fri, Jul 12, 2019 at 17:03:38

> On Fri, 12 Jul 2019 13:53:29 +0200
> Vitor Soares <Vitor.Soares@synopsys.com> wrote:
>
> > The i3c device driver needs the i3c_device_id table.
>
> "Some I3C device drivers need to know which entry matches the
> i3c_device object passed to the probe function"
>
> > Lets move to device.c and export it to be used.
>
> "Let's move i3c_device_match_id() to device.c and export it so it can be
> used by drivers."
>

Fix in next drop.

> >
> > Signed-off-by: Vitor Soares <vitor.soares@synopsys.com>
> > ---
> > Changes in v4:
> > None
> >
> > Changes in v3:
> > Remove i3c_get_device_id
> > Move i3c_device_match_id from drivers/i3c/master.c to drivers/i3c/device.c
> > Export i3c_device_match_id
> >
> > Changes in v2:
> > move this function to drivers/i3c/device.c
> >
> > drivers/i3c/device.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++
> > drivers/i3c/master.c | 45 ---------------------------------------------
> > include/linux/i3c/device.h | 4 ++++
> > 3 files changed, 50 insertions(+), 45 deletions(-)
> >
> > diff --git a/drivers/i3c/device.c b/drivers/i3c/device.c
> > index 69cc040..383df3b 100644
> > --- a/drivers/i3c/device.c
> > +++ b/drivers/i3c/device.c
> > @@ -200,6 +200,52 @@ struct i3c_device *dev_to_i3cdev(struct device *dev)
> > }
> > EXPORT_SYMBOL_GPL(dev_to_i3cdev);
> >
>
> You're missing a kerneldoc here.

I will do that. Can you clarify why we need that?

>
> > +const struct i3c_device_id *
> > +i3c_device_match_id(struct i3c_device *i3cdev,
> > + const struct i3c_device_id *id_table)
> > +{
> > + struct i3c_device_info devinfo;
> > + const struct i3c_device_id *id;
> > +
> > + i3c_device_get_info(i3cdev, &devinfo);
> > +
> > + /*
> > + * The lower 32bits of the provisional ID is just filled with a random
> > + * value, try to match using DCR info.
> > + */
> > + if (!I3C_PID_RND_LOWER_32BITS(devinfo.pid)) {
> > + u16 manuf = I3C_PID_MANUF_ID(devinfo.pid);
> > + u16 part = I3C_PID_PART_ID(devinfo.pid);
> > + u16 ext_info = I3C_PID_EXTRA_INFO(devinfo.pid);
> > +
> > + /* First try to match by manufacturer/part ID. */
> > + for (id = id_table; id->match_flags != 0; id++) {
> > + if ((id->match_flags & I3C_MATCH_MANUF_AND_PART) !=
> > + I3C_MATCH_MANUF_AND_PART)
> > + continue;
> > +
> > + if (manuf != id->manuf_id || part != id->part_id)
> > + continue;
> > +
> > + if ((id->match_flags & I3C_MATCH_EXTRA_INFO) &&
> > + ext_info != id->extra_info)
> > + continue;
> > +
> > + return id;
> > + }
> > + }
> > +
> > + /* Fallback to DCR match. */
> > + for (id = id_table; id->match_flags != 0; id++) {
> > + if ((id->match_flags & I3C_MATCH_DCR) &&
> > + id->dcr == devinfo.dcr)
> > + return id;
> > + }
> > +
> > + return NULL;
> > +}
> > +EXPORT_SYMBOL_GPL(i3c_device_match_id);
> > +
> > /**
> > * i3c_driver_register_with_owner() - register an I3C device driver
> > *
> > diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c
> > index 5f4bd52..7667f84 100644
> > --- a/drivers/i3c/master.c
> > +++ b/drivers/i3c/master.c
> > @@ -270,51 +270,6 @@ static const struct device_type i3c_device_type = {
> > .uevent = i3c_device_uevent,
> > };
> >
> > -static const struct i3c_device_id *
> > -i3c_device_match_id(struct i3c_device *i3cdev,
> > - const struct i3c_device_id *id_table)
> > -{
> > - struct i3c_device_info devinfo;
> > - const struct i3c_device_id *id;
> > -
> > - i3c_device_get_info(i3cdev, &devinfo);
> > -
> > - /*
> > - * The lower 32bits of the provisional ID is just filled with a random
> > - * value, try to match using DCR info.
> > - */
> > - if (!I3C_PID_RND_LOWER_32BITS(devinfo.pid)) {
> > - u16 manuf = I3C_PID_MANUF_ID(devinfo.pid);
> > - u16 part = I3C_PID_PART_ID(devinfo.pid);
> > - u16 ext_info = I3C_PID_EXTRA_INFO(devinfo.pid);
> > -
> > - /* First try to match by manufacturer/part ID. */
> > - for (id = id_table; id->match_flags != 0; id++) {
> > - if ((id->match_flags & I3C_MATCH_MANUF_AND_PART) !=
> > - I3C_MATCH_MANUF_AND_PART)
> > - continue;
> > -
> > - if (manuf != id->manuf_id || part != id->part_id)
> > - continue;
> > -
> > - if ((id->match_flags & I3C_MATCH_EXTRA_INFO) &&
> > - ext_info != id->extra_info)
> > - continue;
> > -
> > - return id;
> > - }
> > - }
> > -
> > - /* Fallback to DCR match. */
> > - for (id = id_table; id->match_flags != 0; id++) {
> > - if ((id->match_flags & I3C_MATCH_DCR) &&
> > - id->dcr == devinfo.dcr)
> > - return id;
> > - }
> > -
> > - return NULL;
> > -}
> > -
> > static int i3c_device_match(struct device *dev, struct device_driver *drv)
> > {
> > struct i3c_device *i3cdev;
> > diff --git a/include/linux/i3c/device.h b/include/linux/i3c/device.h
> > index 5ecb055..de102e4 100644
> > --- a/include/linux/i3c/device.h
> > +++ b/include/linux/i3c/device.h
> > @@ -188,6 +188,10 @@ static inline struct i3c_driver *drv_to_i3cdrv(struct device_driver *drv)
> > struct device *i3cdev_to_dev(struct i3c_device *i3cdev);
> > struct i3c_device *dev_to_i3cdev(struct device *dev);
> >
> > +const struct i3c_device_id *
> > +i3c_device_match_id(struct i3c_device *i3cdev,
> > + const struct i3c_device_id *id_table);
> > +
> > static inline void i3cdev_set_drvdata(struct i3c_device *i3cdev,
> > void *data)
> > {
>
>
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Thanks for your comments.

Best regards,
Vitor Soares