From: Jonathan Cameron <jic23@kernel.org>
To: Phil Reid <preid@electromag.com.au>
Cc: Song Qiang <songqiang1304521@gmail.com>,
knaack.h@gmx.de, lars@metafoo.de, pmeerw@pmeerw.net,
robh+dt@kernel.org, mark.rutland@arm.com,
himanshujha199640@gmail.com, linux-iio@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 3/3] iio: magnetometer: Add driver support for PNI RM3100
Date: Sun, 7 Oct 2018 16:07:30 +0100 [thread overview]
Message-ID: <20181007160730.4df1010b@archlinux> (raw)
In-Reply-To: <b73d2ff2-f93a-1268-67f9-08620f05770d@electromag.com.au>
On Wed, 3 Oct 2018 09:42:14 +0800
Phil Reid <preid@electromag.com.au> wrote:
> G'day Song,
Hi Phil. Good point below. One general thing though, if you
could possibly crop down a review email when you are addressing one specific
point it would be very much appreciated!
Saves everyone else scrolling and if they have a rubbish email client
missing the comment entirely!
Thanks,
>
> Noticed a one more thing below
>
...
> > +int rm3100_common_probe(struct device *dev, struct regmap *regmap, int irq)
> > +{
> > + struct iio_dev *indio_dev;
> > + struct rm3100_data *data;
> > + unsigned int tmp;
> > + int ret;
> > +
> > + indio_dev = devm_iio_device_alloc(dev, sizeof(*data));
> > + if (!indio_dev)
> > + return -ENOMEM;
> > +
> > + data = iio_priv(indio_dev);
> > + data->regmap = regmap;
> > +
> > + mutex_init(&data->lock);
> > +
> > + indio_dev->dev.parent = dev;
> > + indio_dev->name = "rm3100";
> > + indio_dev->info = &rm3100_info;
> > + indio_dev->channels = rm3100_channels;
> > + indio_dev->num_channels = ARRAY_SIZE(rm3100_channels);
> > + indio_dev->modes = INDIO_DIRECT_MODE;
> > + indio_dev->available_scan_masks = rm3100_scan_masks;
> > +
> > + if (!irq)
> > + data->use_interrupt = false;
> > + else {
> > + data->use_interrupt = true;
> > + ret = devm_request_irq(dev,
> > + irq,
> > + rm3100_irq_handler,
> > + IRQF_TRIGGER_RISING,
> > + indio_dev->name,
> > + data);
>
> Assuming the irq source is the DRDY pin, this pin is active high.
> Which is automatically cleared when reading the measurement results register.
>
> Perhaps when using interrupts the irq handler should do the read into data->buffer
> to clear the irq. Would need to use devm_request_threaded_irq instead.
Agreed. With a level interrupt that is the easiest way to handle it.
Grab the data in the threaded handler and complete after that.
Jonathan
>
> The SOC irq block I use doesn't support edge triggered irqs, so this currently wouldn't work if
> DRDY was connected to that.
>
>
> > + if (ret < 0) {
> > + dev_err(dev, "request irq line failed.\n");
> > + return ret;
> > + }
> > + init_completion(&data->measuring_done);
> > + }
> > +
> > + ret = devm_iio_triggered_buffer_setup(dev, indio_dev, NULL,
> > + rm3100_trigger_handler, NULL);
> > + if (ret < 0)
> > + return ret;
> > +
> > + ret = regmap_read(regmap, RM3100_REG_TMRC, &tmp);
> > + if (ret < 0)
> > + return ret;
> > + /* Initializing max wait time, 3sec more wait time for conversion. */
> > + data->conversion_time =
> > + rm3100_samp_rates[tmp - RM3100_TMRC_OFFSET][2] + 3000;
> > +
...
next prev parent reply other threads:[~2018-10-07 15:07 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-25 3:17 [PATCH 1/2] iio: magnetometer: Add DT support for PNI RM3100 Song Qiang
2018-09-25 3:17 ` [PATCH 2/2] iio: magnetometer: Add driver " Song Qiang
2018-09-25 13:30 ` Jonathan Cameron
2018-09-25 14:36 ` Phil Reid
2018-09-26 1:49 ` Song Qiang
2018-09-26 2:30 ` Phil Reid
2018-09-26 8:09 ` Song Qiang
2018-09-27 1:57 ` Phil Reid
2018-09-29 11:37 ` Jonathan Cameron
2018-09-26 1:33 ` Song Qiang
2018-09-29 11:45 ` Jonathan Cameron
2018-09-25 17:50 ` Himanshu Jha
2018-09-26 2:24 ` Song Qiang
2018-09-25 13:05 ` [PATCH 1/2] iio: magnetometer: Add DT " Jonathan Cameron
2018-10-02 14:38 ` [PATCH v3 0/3] Add support for PNI RM3100 magnetometer Song Qiang
2018-10-02 14:38 ` [PATCH v3 1/3] dt-bindings: Add PNI to the vendor prefixes Song Qiang
2018-10-02 14:38 ` [PATCH v3 2/3] dt-bindings: Add PNI RM3100 device tree binding Song Qiang
2018-10-07 15:18 ` Jonathan Cameron
2018-10-07 15:20 ` Jonathan Cameron
2018-10-02 14:38 ` [PATCH v3 3/3] iio: magnetometer: Add driver support for PNI RM3100 Song Qiang
2018-10-03 1:42 ` Phil Reid
2018-10-07 15:07 ` Jonathan Cameron [this message]
2018-10-07 15:44 ` Jonathan Cameron
2018-10-11 4:35 ` Song Qiang
2018-10-13 9:24 ` Jonathan Cameron
2018-10-12 7:35 ` [PATCH v4 0/3] Add support for PNI RM3100 magnetometer Song Qiang
2018-10-12 7:35 ` [PATCH v4 1/3] dt-bindings: Add PNI to the vendor prefixes Song Qiang
2018-10-12 11:36 ` Rob Herring
2018-10-12 7:35 ` [PATCH v4 2/3] iio: magnetometer: Add DT support for PNI RM3100 Song Qiang
2018-10-12 11:37 ` Rob Herring
2018-10-12 7:35 ` [PATCH v4 3/3] iio: magnetometer: Add driver " Song Qiang
2018-10-12 8:36 ` Song Qiang
2018-10-12 12:53 ` Himanshu Jha
2018-10-17 8:00 ` Song Qiang
2018-10-21 14:08 ` Jonathan Cameron
2018-10-13 10:19 ` Jonathan Cameron
2018-10-18 8:24 ` Song Qiang
2018-10-21 14:14 ` Jonathan Cameron
2018-11-02 7:55 ` Song Qiang
2018-11-02 9:24 ` Jonathan Cameron
2018-11-05 0:39 ` Song Qiang
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