From: Wolfram Sang <wsa@kernel.org>
To: Jie Deng <jie.deng@intel.com>
Cc: linux-i2c@vger.kernel.org,
virtualization@lists.linux-foundation.org,
linux-kernel@vger.kernel.org, mst@redhat.com,
jasowang@redhat.com, andriy.shevchenko@linux.intel.com,
conghui.chen@intel.com, arnd@arndb.de, kblaiech@mellanox.com,
jarkko.nikula@linux.intel.com, Sergey.Semin@baikalelectronics.ru,
rppt@kernel.org, loic.poulain@linaro.org, tali.perry1@gmail.com,
u.kleine-koenig@pengutronix.de, bjorn.andersson@linaro.org,
yu1.wang@intel.com, shuo.a.liu@intel.com,
viresh.kumar@linaro.org, stefanha@redhat.com,
pbonzini@redhat.com
Subject: Re: [PATCH v10] i2c: virtio: add a virtio i2c frontend driver
Date: Wed, 30 Jun 2021 09:32:14 +0200 [thread overview]
Message-ID: <YNwd/t3DMKSOrTAT@ninjato> (raw)
In-Reply-To: <05cc9484-f97b-0533-64fe-ff917c6b87ee@intel.com>
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> > > + snprintf(vi->adap.name, sizeof(vi->adap.name), "Virtio I2C Adapter");
> > Is there something to add so you can distinguish multiple instances?
> > Most people want that.
>
>
> I find the I2C core will set a device name "i2c-%d" for this purpose, right?
>
> I think this name can be used to distinguish the adapter types while
> "i2c-%d" can be used to
>
> distinguish instances. Does it make sense ?
That alone does not help. See the 'i2cdetect -l' output of my Renesas
board here:
i2c-4 i2c e66d8000.i2c I2C adapter
i2c-2 i2c e6510000.i2c I2C adapter
i2c-7 i2c e60b0000.i2c I2C adapter
Notice that the third column carries the base address, so you know which
i2c-%d is which physical bus. I don't know if it makes sense in your
"virtual" case, but so far it would always print "Virtio I2C Adapter".
Maybe it makes sense to add some parent device name, too?
And if this is not reasonable, just skip it. As I said, it can be
helpful at times, but it is definately not a show stopper.
> > > + vi->adap.timeout = HZ / 10;
> > Why so short? HZ is the kinda default value.
>
>
> Ah... I didn't know the I2C core had already set a default value.
> I will remove this line to use the default one.
Sounds good.
Looking forward to the next version!
Happy hacking,
Wolfram
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next prev parent reply other threads:[~2021-06-30 7:32 UTC|newest]
Thread overview: 75+ 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 7:27 ` Viresh Kumar
2021-03-23 8:33 ` Jie Deng
2021-03-23 8:37 ` Viresh Kumar
2021-03-23 9:27 ` Arnd Bergmann
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 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 8:18 ` Wolfram Sang
2021-04-15 8:20 ` Jie Deng
2021-05-27 6:49 ` 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 3:52 ` Viresh Kumar
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 6:09 ` Viresh Kumar
2021-03-24 6:41 ` Jie Deng
2021-03-24 6:44 ` Viresh Kumar
2021-04-14 2:07 ` Jie Deng
2021-04-14 3:52 ` Viresh Kumar
2021-04-15 6:25 ` Jie Deng
2021-04-15 3:51 ` Jason Wang
2021-04-15 6:17 ` Jie Deng
2021-06-28 8:39 ` Wolfram Sang
2021-06-28 9:01 ` Arnd Bergmann
2021-06-28 9:25 ` Wolfram Sang
2021-06-28 9:51 ` Arnd Bergmann
2021-06-28 10:13 ` Wolfram Sang
2021-06-28 11:50 ` Arnd Bergmann
2021-06-28 14:58 ` Wolfram Sang
2021-06-29 3:04 ` Jie Deng
2021-06-29 8:30 ` Wolfram Sang
2021-06-29 9:13 ` Viresh Kumar
2021-06-29 9:36 ` Wolfram Sang
2021-06-29 4:10 ` Viresh Kumar
2021-06-29 8:27 ` Wolfram Sang
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
2021-06-29 3:03 ` Jie Deng
2021-06-29 10:07 ` Wolfram Sang
2021-06-29 10:16 ` Viresh Kumar
2021-06-29 10:23 ` Wolfram Sang
2021-06-29 10:30 ` Viresh Kumar
2021-06-29 10:42 ` Wolfram Sang
2021-06-29 10:43 ` Wolfram Sang
2021-06-29 10:56 ` Viresh Kumar
2021-06-29 11:11 ` Wolfram Sang
2021-06-29 11:16 ` Viresh Kumar
2021-06-29 11:48 ` Wolfram Sang
2021-07-05 12:18 ` Viresh Kumar
2021-07-06 1:50 ` Jie Deng
2021-07-22 15:15 ` Wolfram Sang
2021-07-23 2:28 ` Viresh Kumar
2021-07-23 5:28 ` Viresh Kumar
2021-06-30 6:45 ` Jie Deng
2021-06-30 7:32 ` Wolfram Sang [this message]
2021-06-30 7:51 ` Jie Deng
2021-06-30 7:55 ` Arnd Bergmann
2021-06-30 8:04 ` Wolfram Sang
2021-06-30 8:07 ` Andy Shevchenko
2021-06-30 8:29 ` Arnd Bergmann
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