linux-kernel - Re: [PATCH v10] i2c: virtio: add a virtio i2c frontend driver

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Date:   Tue, 29 Jun 2021 12:23:52 +0200
From:   Wolfram Sang <wsa@...nel.org>
To:     Viresh Kumar <viresh.kumar@...aro.org>
Cc:     Jie Deng <jie.deng@...el.com>, linux-i2c@...r.kernel.org,
        virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org, mst@...hat.com, jasowang@...hat.com,
        andriy.shevchenko@...ux.intel.com, conghui.chen@...el.com,
        arnd@...db.de, kblaiech@...lanox.com,
        jarkko.nikula@...ux.intel.com, Sergey.Semin@...kalelectronics.ru,
        rppt@...nel.org, loic.poulain@...aro.org, tali.perry1@...il.com,
        u.kleine-koenig@...gutronix.de, bjorn.andersson@...aro.org,
        yu1.wang@...el.com, shuo.a.liu@...el.com, stefanha@...hat.com,
        pbonzini@...hat.com
Subject: Re: [PATCH v10] i2c: virtio: add a virtio i2c frontend driver


> > You are not emulating I2C_FUNC_SMBUS_QUICK, so you need to mask it out.
> 
> What is it that we need to have to emulate it ? I did use it in my
> qemu and rust backends, not sure if this was ever sent by device I
> used for testing SMBUS though.

The biggest use is to scan busses for devices, i.e. use 'i2cdetect'
without the -r parameter.


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