linux-kernel - Re: [PATCH v5 2/8] i2c: iproc: Add slave mode support

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Date:   Wed, 27 Mar 2019 23:41:52 +0100
From:   Wolfram Sang <wsa@...-dreams.de>
To:     Ray Jui <ray.jui@...adcom.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>, linux-i2c@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org,
        bcm-kernel-feedback-list@...adcom.com,
        Rayagonda Kokatanur <rayagonda.kokatanur@...adcom.com>,
        Shreesha Rajashekar <shreesha.rajashekar@...adcom.com>,
        Michael Cheng <ccheng@...adcom.com>
Subject: Re: [PATCH v5 2/8] i2c: iproc: Add slave mode support


> > +	/* flush TX/RX FIFOs */
> > +	val = (BIT(S_FIFO_RX_FLUSH_SHIFT) | BIT(S_FIFO_TX_FLUSH_SHIFT));
> > +	writel(val, iproc_i2c->base + S_FIFO_CTRL_OFFSET);
> 
> Will flushing FIFOs work when a slave is register while a master
> transfer is on-going at the same time?

Sorry, my bad, this can't happen. Registering a slave is protected by
the adapter lock.


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