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

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Message-ID: <20190416081825.2d17b771@collabora.com>
Date:   Tue, 16 Apr 2019 08:18:25 +0200
From:   Boris Brezillon <boris.brezillon@...labora.com>
To:     Vitor Soares <vitor.soares@...opsys.com>
Cc:     linux-iio@...r.kernel.org, linux-i3c@...ts.infradead.org,
        linux-kernel@...r.kernel.org, pmeerw@...erw.net, lars@...afoo.de,
        knaack.h@....de, jic23@...nel.org, lorenzo.bianconi83@...il.com,
        bbrezillon@...nel.org, rafael@...nel.org,
        gregkh@...uxfoundation.org, broonie@...nel.org,
        joao.pinto@...opsys.com
Subject: Re: [PATCH 2/3] i3c: Add i3c_get_device_id helper

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

> +
>  /**
>   * 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)