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Date:   Thu, 28 Jan 2021 10:20:48 +0100
From:   Wolfram Sang <wsa@the-dreams.de>
To:     Kevin Herbert <kph@platinasystems.com>
Cc:     Oleksij Rempel <o.rempel@pengutronix.de>,
        Biwen Li <biwen.li@nxp.com>, Leo Li <leoyang.li@nxp.com>,
        linux@rempel-privat.de, kernel@pengutronix.de, shawnguo@kernel.org,
        s.hauer@pengutronix.de, festevam@gmail.com,
        Aisheng Dong <aisheng.dong@nxp.com>,
        Clark Wang <xiaoning.wang@nxp.com>, linux-i2c@vger.kernel.org,
        linux-kernel@vger.kernel.org, Jiafei Pan <jiafei.pan@nxp.com>,
        Xiaobo Xie <xiaobo.xie@nxp.com>,
        linux-arm-kernel@lists.infradead.org,
        Biwen Li <biwen.li@oss.nxp.com>
Subject: Re: [PATCH] i2c-imx.c: Synthesize end of transaction events without
 idle interrupts
Message-ID: <20210128092048.GK963@ninjato>
References: <20201222194850.2274527-1-kph@platinasystems.com>
 <20210108080521.dzm2gczd3d2ygb5y@pengutronix.de>
 <CABP=6zY0xV3dLE5t7qad6TauQsaLmQtYi73BS9XBHwZ2FrgM8g@mail.gmail.com>
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On Thu, Jan 14, 2021 at 05:27:11PM -0800, Kevin Herbert wrote:
> The loop sends either one or two events to the slave driver. If the
> state is I2C_SLAVE_READ_REQUESTED, we synthesize the
> I2C_SLAVE_READ_PROCESSED event, and then our state becomes
> I2C_SLAVE_READ_PROCESSED. In all other states, we transition to
> I2C_SLAVE_STOP and exit the loop.
>=20
> It is not a busy loop at all. It is calling the callback handler (that
> already expects to be in IRQ context) one or two times, and then it
> exits the loop.

Oleksij, does this answer your question?


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