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Message-ID: <CAJMQK-gb+A9dwyMqMcA5yaaXak9no8_=urwK0XbLnNAEGyZ_hg@mail.gmail.com>
Date: Fri, 23 Aug 2019 16:13:29 +0800
From: Hsin-Yi Wang <hsinyi@...omium.org>
To: Qii Wang <qii.wang@...iatek.com>
Cc: Wolfram Sang <wsa@...-dreams.de>,
Yingjoe Chen <yingjoe.chen@...iatek.com>,
Matthias Brugger <matthias.bgg@...il.com>,
Nicolas Boichat <drinkcat@...omium.org>,
Jun Gao <jun.gao@...iatek.com>,
Thomas Gleixner <tglx@...utronix.de>,
linux-i2c@...r.kernel.org,
"moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE"
<linux-arm-kernel@...ts.infradead.org>,
linux-mediatek@...ts.infradead.org,
lkml <linux-kernel@...r.kernel.org>,
Alexandru M Stan <amstan@...omium.org>
Subject: Re: [PATCH v2] i2c: mediatek: disable zero-length transfers for mt8183
On Fri, Aug 23, 2019 at 4:09 PM Qii Wang <qii.wang@...iatek.com> wrote:
> >
> > static u32 mtk_i2c_functionality(struct i2c_adapter *adap)
> > {
> > - return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
> > + if (adap->quirks->flags & I2C_AQ_NO_ZERO_LEN)
> > + return I2C_FUNC_I2C |
> > + (I2C_FUNC_SMBUS_EMUL & ~I2C_FUNC_SMBUS_QUICK);
> > + else
> > + return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
>
> It can be removed?
See previous discussion: https://patchwork.kernel.org/patch/10814391/#22484435
but not all SoC's quirks has I2C_AQ_NO_ZERO_LEN.
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