linux-kernel - RE: [PATCH 2/3] i3c: Add i3c_get_device

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Date:   Tue, 16 Apr 2019 14:48:26 +0000
From:   Vitor Soares <vitor.soares@...opsys.com>
To:     Boris Brezillon <boris.brezillon@...labora.com>,
        Vitor Soares <vitor.soares@...opsys.com>
CC:     "linux-iio@...r.kernel.org" <linux-iio@...r.kernel.org>,
        "linux-i3c@...ts.infradead.org" <linux-i3c@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "pmeerw@...erw.net" <pmeerw@...erw.net>,
        "lars@...afoo.de" <lars@...afoo.de>,
        "knaack.h@....de" <knaack.h@....de>,
        "jic23@...nel.org" <jic23@...nel.org>,
        "lorenzo.bianconi83@...il.com" <lorenzo.bianconi83@...il.com>,
        "bbrezillon@...nel.org" <bbrezillon@...nel.org>,
        "rafael@...nel.org" <rafael@...nel.org>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "broonie@...nel.org" <broonie@...nel.org>,
        "joao.pinto@...opsys.com" <joao.pinto@...opsys.com>
Subject: RE: [PATCH 2/3] i3c: Add i3c_get_device_id helper

Hi Boris,

From: Boris Brezillon <boris.brezillon@...labora.com>
Date: Tue, Apr 16, 2019 at 07:18:25

> On Mon, 15 Apr 2019 21:19:40 +0200
> Vitor Soares <vitor.soares@...opsys.com> wrote:
> 
> > This helper return the i3c_device_id structure in order the client
> > have access to the driver data.
> > 
> > Signed-off-by: Vitor Soares <vitor.soares@...opsys.com>
> > ---
> >  drivers/i3c/device.c       | 8 ++++++++
> >  include/linux/i3c/device.h | 1 +
> >  2 files changed, 9 insertions(+)
> > 
> > diff --git a/drivers/i3c/device.c b/drivers/i3c/device.c
> > index 472be99..8ab8e4c 100644
> > --- a/drivers/i3c/device.c
> > +++ b/drivers/i3c/device.c
> > @@ -235,6 +235,14 @@ struct i3c_device *dev_to_i3cdev(struct device *dev)
> >  }
> >  EXPORT_SYMBOL_GPL(dev_to_i3cdev);
> >  
> > +const struct i3c_device_id *i3c_get_device_id(struct i3c_device *i3cdev)
> > +{
> > +	const struct i3c_driver *i3cdrv = drv_to_i3cdrv(i3cdev->dev.driver);
> > +
> > +	return i3cdrv->id_table;
> > +}
> > +EXPORT_SYMBOL_GPL(i3c_get_device_id);
> 
> I think what you want is i3c_device_match_id(). 

I want the i3c_device_id struct of an i3c_device. What is the name that 
you suggest?

>Just move the function
> to drivers/i3c/device.c, export it and define its prototype in
> include/i3c/device.h.

You are right, this should go for the device side.

> 
> > +
> >  /**
> >   * i3c_driver_register_with_owner() - register an I3C device driver
> >   *
> > diff --git a/include/linux/i3c/device.h b/include/linux/i3c/device.h
> > index 7ee7e30..ee48886 100644
> > --- a/include/linux/i3c/device.h
> > +++ b/include/linux/i3c/device.h
> > @@ -211,6 +211,7 @@ 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_get_device_id(struct i3c_device *i3cdev);
> >  
> >  static inline void i3cdev_set_drvdata(struct i3c_device *i3cdev,
> >  				      void *data)

Best regards,
Vitor Soares