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From: Kevin Cernekee <cernekee@chromium.org>
Date: Fri, 6 Feb 2015 15:01:15 -0800
Message-ID: <CAJzqFtaVJFPpFN17CTXNhjYrsPKn3AS00tMufw3yF=VqxQX6zw@mail.gmail.com>
Subject: Re: [v7,2/3] i2c: iproc: Add Broadcom iProc I2C Driver
To: Dmitry Torokhov <dtor@chromium.org>
Cc: Ray Jui <rjui@broadcom.com>, Wolfram Sang <wsa@the-dreams.de>,
        =?UTF-8?Q?Uwe_Kleine=2DK=C3=B6nig?= 
	<u.kleine-koenig@pengutronix.de>,
        Arend van Spriel <arend@broadcom.com>,
        Rob Herring <robh+dt@kernel.org>, Pawel Moll <pawel.moll@arm.com>,
        Mark Rutland <mark.rutland@arm.com>,
        Ian Campbell <ijc+devicetree@hellion.org.uk>,
        Kumar Gala <galak@codeaurora.org>,
        Grant Likely <grant.likely@linaro.org>,
        Christian Daudt <bcm@fixthebug.org>, Matt Porter <mporter@linaro.org>,
        Florian Fainelli <f.fainelli@gmail.com>,
        Russell King <linux@arm.linux.org.uk>,
        Scott Branden <sbranden@broadcom.com>, linux-i2c@vger.kernel.org,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        linux-arm-kernel@lists.infradead.org,
        bcm-kernel-feedback-list@broadcom.com, devicetree@vger.kernel.org
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On Fri, Feb 6, 2015 at 2:48 PM, Dmitry Torokhov <dtor@chromium.org> wrote:
> On Fri, Feb 6, 2015 at 2:31 PM, Kevin Cernekee <cernekee@chromium.org> wrote:
>> On Mon, Jan 19, 2015 at 01:51:49PM -0800, Ray Jui wrote:
>>> +
>>> +     dev_dbg(iproc_i2c->device, "xfer %c, addr=0x%02x, len=%d\n",
>>> +             (msg->flags & I2C_M_RD) ? 'R' : 'W', msg->addr,
>>> +             msg->len);
>>> +     dev_dbg(iproc_i2c->device, "**** data start ****\n");
>>> +     for (i = 0; i < msg->len; i++)
>>> +             dev_dbg(iproc_i2c->device, "0x%02x ",  msg->buf[i]);
>>> +     dev_dbg(iproc_i2c->device, "**** data end ****\n");
>>
>> It might be simpler to just do:
>>
>>     print_hex_dump_bytes("iproc_i2c:", DUMP_PREFIX_NONE, msg->buf, msg->len);
>>
>> although you'd lose the ability to see the I2C device name.
>
> We can also do:
>
> dev_dbg(iproc_i2c->device, "*** data: %*ph\n", msg->len, msg->buf);
>
> if we are OK with limiting output to 64 bytes.

msg->len is capped at 63 due to hardware limits, so that should work.
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