From: Arnd Bergmann <arnd@arndb.de>
To: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: "Jie Deng" <jie.deng@intel.com>, "Wolfram Sang" <wsa@kernel.org>,
"Linux I2C" <linux-i2c@vger.kernel.org>,
virtualization@lists.linux-foundation.org,
"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
"Michael S. Tsirkin" <mst@redhat.com>,
"Jason Wang" <jasowang@redhat.com>,
conghui.chen@intel.com, kblaiech@mellanox.com,
jarkko.nikula@linux.intel.com,
"Sergey Semin" <Sergey.Semin@baikalelectronics.ru>,
"Mike Rapoport" <rppt@kernel.org>,
loic.poulain@linaro.org, "Tali Perry" <tali.perry1@gmail.com>,
"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
"Bjorn Andersson" <bjorn.andersson@linaro.org>,
yu1.wang@intel.com, shuo.a.liu@intel.com,
"Viresh Kumar" <viresh.kumar@linaro.org>,
"Stefan Hajnoczi" <stefanha@redhat.com>,
"Paolo Bonzini" <pbonzini@redhat.com>
Subject: Re: [PATCH v10] i2c: virtio: add a virtio i2c frontend driver
Date: Wed, 30 Jun 2021 10:29:40 +0200 [thread overview]
Message-ID: <CAK8P3a09CR4xnm+JW70quHz=6=AedrtNAc_2o=ZUNZ_Y30KnJw@mail.gmail.com> (raw)
In-Reply-To: <YNwmO0LhcS//hvc5@smile.fi.intel.com>
On Wed, Jun 30, 2021 at 10:09 AM Andy Shevchenko
<andriy.shevchenko@linux.intel.com> wrote:
>
> On Wed, Jun 30, 2021 at 09:55:49AM +0200, Arnd Bergmann wrote:
> > On Wed, Jun 30, 2021 at 9:51 AM Jie Deng <jie.deng@intel.com> wrote:
>
> ...
>
> > On a related note, we are apparently still missing the bit in the virtio bus
> > layer that fills in the dev->of_node pointer of the virtio device. Without
> > this, it is not actually possible to automatically probe i2c devices connected
> > to a virtio-i2c bus. The same problem came up again with the virtio-gpio
> > driver that suffers from the same issue.
>
> Don't we need to take care about fwnode handle as well?
I'm fairly sure this gets set up automatically on DT based systems, based
on the dev->of_node of the virtio device, with no changes to the i2c
core core.
If you want to automatically probe i2c devices on a virtio-i2c controller
with ACPI, I have no idea if that would require changes to both
i2c-core-acpi.c as well as the virtio core, or just one of them.
So far, my assumption was that this would not be needed with ACPI.
Arnd
WARNING: multiple messages have this Message-ID (diff)
From: Arnd Bergmann <arnd@arndb.de>
To: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: "Sergey Semin" <Sergey.Semin@baikalelectronics.ru>,
"Bjorn Andersson" <bjorn.andersson@linaro.org>,
loic.poulain@linaro.org, "Michael S. Tsirkin" <mst@redhat.com>,
"Viresh Kumar" <viresh.kumar@linaro.org>,
shuo.a.liu@intel.com,
"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
virtualization@lists.linux-foundation.org,
"Wolfram Sang" <wsa@kernel.org>,
"Paolo Bonzini" <pbonzini@redhat.com>,
jarkko.nikula@linux.intel.com,
"Linux I2C" <linux-i2c@vger.kernel.org>,
"Stefan Hajnoczi" <stefanha@redhat.com>,
"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
kblaiech@mellanox.com, "Tali Perry" <tali.perry1@gmail.com>,
conghui.chen@intel.com, "Mike Rapoport" <rppt@kernel.org>,
yu1.wang@intel.com
Subject: Re: [PATCH v10] i2c: virtio: add a virtio i2c frontend driver
Date: Wed, 30 Jun 2021 10:29:40 +0200 [thread overview]
Message-ID: <CAK8P3a09CR4xnm+JW70quHz=6=AedrtNAc_2o=ZUNZ_Y30KnJw@mail.gmail.com> (raw)
In-Reply-To: <YNwmO0LhcS//hvc5@smile.fi.intel.com>
On Wed, Jun 30, 2021 at 10:09 AM Andy Shevchenko
<andriy.shevchenko@linux.intel.com> wrote:
>
> On Wed, Jun 30, 2021 at 09:55:49AM +0200, Arnd Bergmann wrote:
> > On Wed, Jun 30, 2021 at 9:51 AM Jie Deng <jie.deng@intel.com> wrote:
>
> ...
>
> > On a related note, we are apparently still missing the bit in the virtio bus
> > layer that fills in the dev->of_node pointer of the virtio device. Without
> > this, it is not actually possible to automatically probe i2c devices connected
> > to a virtio-i2c bus. The same problem came up again with the virtio-gpio
> > driver that suffers from the same issue.
>
> Don't we need to take care about fwnode handle as well?
I'm fairly sure this gets set up automatically on DT based systems, based
on the dev->of_node of the virtio device, with no changes to the i2c
core core.
If you want to automatically probe i2c devices on a virtio-i2c controller
with ACPI, I have no idea if that would require changes to both
i2c-core-acpi.c as well as the virtio core, or just one of them.
So far, my assumption was that this would not be needed with ACPI.
Arnd
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next prev parent reply other threads:[~2021-06-30 8:32 UTC|newest]
Thread overview: 114+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-23 14:19 [PATCH v10] i2c: virtio: add a virtio i2c frontend driver Jie Deng
2021-03-23 14:19 ` Jie Deng
2021-03-23 7:27 ` Viresh Kumar
2021-03-23 8:33 ` Jie Deng
2021-03-23 8:33 ` Jie Deng
2021-03-23 8:37 ` Viresh Kumar
2021-03-23 9:27 ` Arnd Bergmann
2021-03-23 9:27 ` Arnd Bergmann
2021-03-24 1:17 ` Jie Deng
2021-03-24 1:17 ` Jie Deng
2021-03-24 4:00 ` Viresh Kumar
2021-04-15 6:45 ` Viresh Kumar
2021-04-15 6:56 ` Jie Deng
2021-04-15 6:56 ` Jie Deng
2021-04-15 7:15 ` Viresh Kumar
2021-04-15 7:21 ` Wolfram Sang
2021-04-15 7:24 ` Viresh Kumar
2021-04-15 7:28 ` Wolfram Sang
2021-04-15 7:37 ` Viresh Kumar
2021-04-15 8:15 ` Jie Deng
2021-04-15 8:15 ` Jie Deng
2021-04-15 8:18 ` Wolfram Sang
2021-04-15 8:20 ` Jie Deng
2021-04-15 8:20 ` Jie Deng
2021-05-27 6:49 ` Jie Deng
2021-05-27 6:49 ` Jie Deng
2021-05-12 1:37 ` Jie Deng
2021-05-12 1:37 ` Jie Deng
2021-03-23 9:01 ` Viresh Kumar
2021-03-23 9:38 ` Viresh Kumar
2021-03-24 0:53 ` Jie Deng
2021-03-24 0:53 ` Jie Deng
2021-03-24 3:52 ` Viresh Kumar
2021-03-24 4:00 ` Jie Deng
2021-03-24 4:00 ` Jie Deng
2021-03-24 4:02 ` Viresh Kumar
2021-03-24 4:20 ` Viresh Kumar
2021-03-24 6:05 ` Jie Deng
2021-03-24 6:05 ` Jie Deng
2021-03-24 6:09 ` Viresh Kumar
2021-03-24 6:41 ` Jie Deng
2021-03-24 6:41 ` Jie Deng
2021-03-24 6:44 ` Viresh Kumar
2021-04-14 2:07 ` Jie Deng
2021-04-14 2:07 ` Jie Deng
2021-04-14 3:52 ` Viresh Kumar
2021-04-15 6:25 ` Jie Deng
2021-04-15 6:25 ` Jie Deng
2021-04-15 3:51 ` Jason Wang
2021-04-15 3:51 ` Jason Wang
2021-04-15 6:17 ` Jie Deng
2021-04-15 6:17 ` Jie Deng
2021-06-28 8:39 ` Wolfram Sang
2021-06-28 9:01 ` Arnd Bergmann
2021-06-28 9:01 ` Arnd Bergmann
2021-06-28 9:25 ` Wolfram Sang
2021-06-28 9:51 ` Arnd Bergmann
2021-06-28 9:51 ` Arnd Bergmann
2021-06-28 10:13 ` Wolfram Sang
2021-06-28 11:50 ` Arnd Bergmann
2021-06-28 11:50 ` Arnd Bergmann
2021-06-28 14:58 ` Wolfram Sang
2021-06-29 3:04 ` Jie Deng
2021-06-29 3:04 ` Jie Deng
2021-06-29 8:30 ` Wolfram Sang
2021-06-29 9:13 ` Viresh Kumar
2021-06-29 9:13 ` Viresh Kumar
2021-06-29 9:36 ` Wolfram Sang
2021-06-29 4:10 ` Viresh Kumar
2021-06-29 4:10 ` Viresh Kumar
2021-06-29 8:27 ` Wolfram Sang
2021-06-29 8:52 ` Viresh Kumar
2021-06-29 8:52 ` Viresh Kumar
2021-06-29 9:07 ` Wolfram Sang
2021-06-30 14:38 ` Wolfram Sang
2021-06-30 15:09 ` Viresh Kumar
2021-06-30 15:09 ` Viresh Kumar
2021-06-29 3:03 ` Jie Deng
2021-06-29 3:03 ` Jie Deng
2021-06-29 10:07 ` Wolfram Sang
2021-06-29 10:16 ` Viresh Kumar
2021-06-29 10:16 ` Viresh Kumar
2021-06-29 10:23 ` Wolfram Sang
2021-06-29 10:30 ` Viresh Kumar
2021-06-29 10:30 ` Viresh Kumar
2021-06-29 10:42 ` Wolfram Sang
2021-06-29 10:43 ` Wolfram Sang
2021-06-29 10:56 ` Viresh Kumar
2021-06-29 10:56 ` Viresh Kumar
2021-06-29 11:11 ` Wolfram Sang
2021-06-29 11:16 ` Viresh Kumar
2021-06-29 11:16 ` Viresh Kumar
2021-06-29 11:48 ` Wolfram Sang
2021-07-05 12:18 ` Viresh Kumar
2021-07-05 12:18 ` Viresh Kumar
2021-07-06 1:50 ` Jie Deng
2021-07-06 1:50 ` Jie Deng
2021-07-22 15:15 ` Wolfram Sang
2021-07-23 2:28 ` Viresh Kumar
2021-07-23 2:28 ` Viresh Kumar
2021-07-23 5:28 ` Viresh Kumar
2021-07-23 5:28 ` Viresh Kumar
2021-06-30 6:45 ` Jie Deng
2021-06-30 6:45 ` Jie Deng
2021-06-30 7:32 ` Wolfram Sang
2021-06-30 7:51 ` Jie Deng
2021-06-30 7:51 ` Jie Deng
2021-06-30 7:55 ` Arnd Bergmann
2021-06-30 7:55 ` Arnd Bergmann
2021-06-30 8:04 ` Wolfram Sang
2021-06-30 8:07 ` Andy Shevchenko
2021-06-30 8:07 ` Andy Shevchenko
2021-06-30 8:29 ` Arnd Bergmann [this message]
2021-06-30 8:29 ` Arnd Bergmann
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