From: Boris Brezillon <boris.brezillon@collabora.com>
To: Vitor Soares <Vitor.Soares@synopsys.com>
Cc: Jose.Abreu@synopsys.com, Joao.Pinto@synopsys.com, arnd@arndb.de,
bbrezillon@kernel.org, gregkh@linuxfoundation.org,
wsa@the-dreams.de, linux-kernel@vger.kernel.org,
broonie@kernel.org, linux-i3c@lists.infradead.org
Subject: Re: [RFC v2 0/4] Introduce i3c device userspace interface
Date: Mon, 17 Feb 2020 18:37:47 +0100 [thread overview]
Message-ID: <20200217183747.6a18d6c4@collabora.com> (raw)
In-Reply-To: <20200217155141.08e87b3f@collabora.com>
On Mon, 17 Feb 2020 15:51:41 +0100
Boris Brezillon <boris.brezillon@collabora.com> wrote:
> Hello Vitor,
>
> Sorry for taking so long to reply, and thanks for working on that topic.
>
> On Wed, 29 Jan 2020 13:17:31 +0100
> Vitor Soares <Vitor.Soares@synopsys.com> wrote:
>
> > For today there is no way to use i3c devices from user space and
> > the introduction of such API will help developers during the i3c device
> > or i3c host controllers development.
> >
> > The i3cdev module is highly based on i2c-dev and yet I tried to address
> > the concerns raised in [1].
> >
> > NOTES:
> > - The i3cdev dynamically request an unused major number.
> >
> > - The i3c devices are dynamically exposed/removed from dev/ folder based
> > on if they have a device driver bound to it.
>
> May I ask why you need to automatically bind devices to the i3cdev
> driver when they don't have a driver matching the device id
> loaded/compiled-in? If we get the i3c subsystem to generate proper
> uevents we should be able to load the i3cdev module and bind the device
> to this driver using a udev rule.
Hm, looks like we already send a proper MODALIAS [1], so we can actually
implement this auto-bind to i3cdev in udev (fall back on i3cdev
load+bind if no matching module is found).
[1]https://elixir.bootlin.com/linux/latest/source/drivers/i3c/master.c#L269
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WARNING: multiple messages have this Message-ID (diff)
From: Boris Brezillon <boris.brezillon@collabora.com>
To: Vitor Soares <Vitor.Soares@synopsys.com>
Cc: Jose.Abreu@synopsys.com, Joao.Pinto@synopsys.com, arnd@arndb.de,
wsa@the-dreams.de, gregkh@linuxfoundation.org,
bbrezillon@kernel.org, linux-kernel@vger.kernel.org,
broonie@kernel.org, linux-i3c@lists.infradead.org
Subject: Re: [RFC v2 0/4] Introduce i3c device userspace interface
Date: Mon, 17 Feb 2020 18:37:47 +0100 [thread overview]
Message-ID: <20200217183747.6a18d6c4@collabora.com> (raw)
In-Reply-To: <20200217155141.08e87b3f@collabora.com>
On Mon, 17 Feb 2020 15:51:41 +0100
Boris Brezillon <boris.brezillon@collabora.com> wrote:
> Hello Vitor,
>
> Sorry for taking so long to reply, and thanks for working on that topic.
>
> On Wed, 29 Jan 2020 13:17:31 +0100
> Vitor Soares <Vitor.Soares@synopsys.com> wrote:
>
> > For today there is no way to use i3c devices from user space and
> > the introduction of such API will help developers during the i3c device
> > or i3c host controllers development.
> >
> > The i3cdev module is highly based on i2c-dev and yet I tried to address
> > the concerns raised in [1].
> >
> > NOTES:
> > - The i3cdev dynamically request an unused major number.
> >
> > - The i3c devices are dynamically exposed/removed from dev/ folder based
> > on if they have a device driver bound to it.
>
> May I ask why you need to automatically bind devices to the i3cdev
> driver when they don't have a driver matching the device id
> loaded/compiled-in? If we get the i3c subsystem to generate proper
> uevents we should be able to load the i3cdev module and bind the device
> to this driver using a udev rule.
Hm, looks like we already send a proper MODALIAS [1], so we can actually
implement this auto-bind to i3cdev in udev (fall back on i3cdev
load+bind if no matching module is found).
[1]https://elixir.bootlin.com/linux/latest/source/drivers/i3c/master.c#L269
next prev parent reply other threads:[~2020-02-17 17:37 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-29 12:17 [RFC v2 0/4] Introduce i3c device userspace interface Vitor Soares
2020-01-29 12:17 ` Vitor Soares
2020-01-29 12:17 ` [RFC v2 1/4] i3c: master: export i3c_masterdev_type Vitor Soares
2020-01-29 12:17 ` Vitor Soares
2020-02-17 14:56 ` Boris Brezillon
2020-02-17 14:56 ` Boris Brezillon
2020-02-17 14:59 ` Boris Brezillon
2020-02-17 14:59 ` Boris Brezillon
2020-01-29 12:17 ` [RFC v2 2/4] i3c: master: export i3c_bus_type symbol Vitor Soares
2020-01-29 12:17 ` Vitor Soares
2020-01-29 12:17 ` [RFC v2 3/4] i3c: master: add i3c_for_each_dev helper Vitor Soares
2020-01-29 12:17 ` Vitor Soares
2020-01-29 12:17 ` [RFC v2 4/4] i3c: add i3cdev module to expose i3c dev in /dev Vitor Soares
2020-01-29 12:17 ` Vitor Soares
2020-01-29 14:30 ` Arnd Bergmann
2020-01-29 14:30 ` Arnd Bergmann
2020-01-29 17:00 ` Vitor Soares
2020-01-29 17:00 ` Vitor Soares
2020-01-29 19:39 ` Arnd Bergmann
2020-01-29 19:39 ` Arnd Bergmann
2020-02-04 13:19 ` Vitor Soares
2020-02-04 13:19 ` Vitor Soares
2020-02-17 15:26 ` Boris Brezillon
2020-02-17 15:26 ` Boris Brezillon
2020-02-17 14:51 ` [RFC v2 0/4] Introduce i3c device userspace interface Boris Brezillon
2020-02-17 14:51 ` Boris Brezillon
2020-02-17 15:06 ` Arnd Bergmann
2020-02-17 15:06 ` Arnd Bergmann
2020-02-17 15:36 ` Boris Brezillon
2020-02-17 15:36 ` Boris Brezillon
2020-02-17 15:55 ` Vitor Soares
2020-02-17 15:55 ` Vitor Soares
2020-02-17 16:03 ` gregkh
2020-02-17 16:03 ` gregkh
2020-02-17 16:12 ` Vitor Soares
2020-02-17 16:12 ` Vitor Soares
2020-02-17 16:23 ` Boris Brezillon
2020-02-17 16:23 ` Boris Brezillon
2020-02-17 16:31 ` Arnd Bergmann
2020-02-17 16:31 ` Arnd Bergmann
2020-02-17 17:06 ` Boris Brezillon
2020-02-17 17:06 ` Boris Brezillon
2020-02-17 16:19 ` Arnd Bergmann
2020-02-17 16:19 ` Arnd Bergmann
2020-02-17 16:34 ` Boris Brezillon
2020-02-17 16:34 ` Boris Brezillon
2020-02-17 15:32 ` Vitor Soares
2020-02-17 15:32 ` Vitor Soares
2020-02-17 15:52 ` Boris Brezillon
2020-02-17 15:52 ` Boris Brezillon
2020-02-17 17:37 ` Boris Brezillon [this message]
2020-02-17 17:37 ` Boris Brezillon
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