From: Andy Shevchenko <andy.shevchenko@gmail.com>
To: Sean Nyekjaer <sean@geanix.com>
Cc: "Jonathan Cameron" <jic23@kernel.org>,
linux-iio <linux-iio@vger.kernel.org>,
"Lars-Peter Clausen" <lars@metafoo.de>,
"Nuno Sá" <Nuno.Sa@analog.com>,
"Rob Herring" <robh+dt@kernel.org>,
devicetree <devicetree@vger.kernel.org>
Subject: Re: [PATCH v4 6/6] iio: accel: fxls8962af: fix errata bug E3 - I2C burst reads
Date: Fri, 30 Apr 2021 12:14:58 +0300 [thread overview]
Message-ID: <CAHp75VcLusrQ0+4DcXf4o0sS=Jc031LDJT4ReMOhVt0U0-jMWQ@mail.gmail.com> (raw)
In-Reply-To: <20210429122806.3814330-6-sean@geanix.com>
On Thu, Apr 29, 2021 at 3:28 PM Sean Nyekjaer <sean@geanix.com> wrote:
>
> When flushing the hw fifo there is a bug in the I2C that prevents burst
> reads of more than one sample pair.
...
> - ret = regmap_raw_read(data->regmap, FXLS8962AF_BUF_X_LSB, buffer,
> - total_length);
> + if (i2c_verify_client(dev)) {
> + /*
> + * Due to errata bug:
> + * E3: FIFO burst read operation error using I2C interface
> + * We have to avoid burst reads on I2C..
> + */
> + for (i = 0; i < samples; i++) {
> + ret = regmap_raw_read(data->regmap, FXLS8962AF_BUF_X_LSB,
> + &buffer[i],
> + sample_length);
> + if (ret < 0)
> + goto out;
> + }
Can you rather create a separate function called
fxls8962af_i2c_raw_read_errata3() and use it here by simply
if (i2c)
ret = fxls8962af_i2c_raw_read_errata3();
else
ret = regmap_raw_read();
?
> + } else {
> + ret = regmap_raw_read(data->regmap, FXLS8962AF_BUF_X_LSB, buffer,
> + total_length);
> + }
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2021-04-30 9:15 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-29 12:28 [PATCH v4 1/6] iio: accel: add support for FXLS8962AF/FXLS8964AF accelerometers Sean Nyekjaer
2021-04-29 12:28 ` [PATCH v4 2/6] dt-bindings: iio: accel: fxls8962af: add bindings Sean Nyekjaer
2021-04-29 15:25 ` Rob Herring
2021-04-29 12:28 ` [PATCH v4 3/6] iio: accel: fxls8962af: add set/get of samplerate Sean Nyekjaer
2021-04-29 12:28 ` [PATCH v4 4/6] iio: accel: fxls8962af: add interrupt support Sean Nyekjaer
2021-04-30 9:02 ` Andy Shevchenko
2021-05-03 11:19 ` Sean Nyekjaer
2021-04-29 12:28 ` [PATCH v4 5/6] iio: accel: fxls8962af: add hw buffered sampling Sean Nyekjaer
2021-04-30 9:10 ` Andy Shevchenko
2021-04-29 12:28 ` [PATCH v4 6/6] iio: accel: fxls8962af: fix errata bug E3 - I2C burst reads Sean Nyekjaer
2021-04-30 9:14 ` Andy Shevchenko [this message]
2021-04-30 9:25 ` [PATCH v4 1/6] iio: accel: add support for FXLS8962AF/FXLS8964AF accelerometers Tomas Melin
2021-05-02 17:46 ` Jonathan Cameron
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