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Date: Fri, 19 Jul 2019 14:49:45 +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, lorenzo@...nel.org,
gregkh@...uxfoundation.org, rafael@...nel.org,
bbrezillon@...nel.org, Joao.Pinto@...opsys.com
Subject: Re: [PATCH v5 1/2] i3c: move i3c_device_match_id to device.c and
export it
On Fri, 19 Jul 2019 13:19:04 +0200
Vitor Soares <Vitor.Soares@...opsys.com> wrote:
> Some I3C device drivers need to know which entry matches the
> i3c_device object passed to the probe function
>
> Let's move i3c_device_match_id() to device.c and export it so it can be
> used by drivers.
>
> Signed-off-by: Vitor Soares <vitor.soares@...opsys.com>
> ---
> Changes in v5:
> Add kerneldoc
> Improve commit message
>
> 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 | 53 ++++++++++++++++++++++++++++++++++++++++++++++
> drivers/i3c/master.c | 45 ---------------------------------------
> include/linux/i3c/device.h | 4 ++++
> 3 files changed, 57 insertions(+), 45 deletions(-)
>
> diff --git a/drivers/i3c/device.c b/drivers/i3c/device.c
> index 69cc040..5349059 100644
> --- a/drivers/i3c/device.c
> +++ b/drivers/i3c/device.c
> @@ -201,6 +201,59 @@ struct i3c_device *dev_to_i3cdev(struct device *dev)
> EXPORT_SYMBOL_GPL(dev_to_i3cdev);
>
> /**
> + * i3c_device_match_id() - Returns the I3C device match id in @i3cdev
Returns the i3c_device_id entry matching
@i3cdev
> + * @i3cdev: I3C device
> + * @id_table: I3C device match table
> + *
> + * Return: a pointer to I3C device id object
an i3c_device_id object or NULL if there's
no match.
> + */
> +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
> *
> * @drv: driver to register
> 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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