From: Lorenzo Bianconi <lorenzo@kernel.org>
To: Sean Nyekjaer <sean@geanix.com>
Cc: lorenzo.bianconi83@gmail.com, jic23@kernel.org,
linux-iio@vger.kernel.org
Subject: Re: [PATCH] iio: imu: st_lsm6dsx: do not roundup set samplerate
Date: Mon, 10 May 2021 08:28:14 +0200 [thread overview]
Message-ID: <YJjSfpTfSMqf3w0v@lore-desk> (raw)
In-Reply-To: <d0b62523-dcc9-ff14-aeaf-db24915f7aeb@geanix.com>
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> On 07/05/2021 13.02, Lorenzo Bianconi wrote:
> >> The correct way to set the sampling rate to 12.5 Hz before
> >> commit f8710f0357bc ("iio: imu: st_lsm6dsx: express odr in mHZ")
> >> was to write 13 Hz to sampling_frequency.
> >> Before this patch writing 13 to samplerate results in sample rate set
> >> to 26 Hz.
> >> Now we return EINVAL if the sampling rate is not in table.
> >>
> >> Signed-off-by: Sean Nyekjaer <sean@geanix.com>
> >
> > I think this patch is breaking i2c-master support available in st_lsm6dsx, have you tested it?
> >
> I have not tested with i2c-master.
> But it's not nice to round up sample rate from user space without any notice.
the point is accel odr is used as trigger for i2c-slave sampling. Connected
i2c slave devices have different sample rates (e.g. LIS2MDL), so we need to
select the lower accel odr greather than slave device one.
Regards,
Lorenzo
>
> /Sean
>
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next prev parent reply other threads:[~2021-05-10 6:28 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-07 10:32 [PATCH] iio: imu: st_lsm6dsx: do not roundup set samplerate Sean Nyekjaer
2021-05-07 11:02 ` Lorenzo Bianconi
2021-05-10 5:25 ` Sean Nyekjaer
2021-05-10 6:28 ` Lorenzo Bianconi [this message]
2021-05-10 6:41 ` Sean Nyekjaer
2021-05-10 12:07 ` Lorenzo Bianconi
2021-05-10 12:14 ` Sean Nyekjaer
2021-05-10 14:47 ` Lorenzo Bianconi
2021-05-10 16:52 ` Sean Nyekjaer
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