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

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Message-ID: <20210629103014.nlk3mpetydc4mi6l@vireshk-i7>
Date:   Tue, 29 Jun 2021 16:00:14 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Wolfram Sang <wsa@...nel.org>, 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

On 29-06-21, 12:23, Wolfram Sang wrote:
> 
> > > 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.

Okay. But what is missing in the driver because of which it should
mask out I2C_FUNC_SMBUS_QUICK.

-- 
viresh