Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752354AbaJYSzp (ORCPT ); Sat, 25 Oct 2014 14:55:45 -0400 Received: from saturn.retrosnub.co.uk ([178.18.118.26]:49795 "EHLO saturn.retrosnub.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752139AbaJYSzl (ORCPT ); Sat, 25 Oct 2014 14:55:41 -0400 Message-ID: <544BF227.3030106@kernel.org> Date: Sat, 25 Oct 2014 19:55:35 +0100 From: Jonathan Cameron User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.2.0 MIME-Version: 1.0 To: Daniel Baluta CC: irina.tirdea@intel.com, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [RFC PATCH v2 1/7] iio: dummy: Add virtual registers for dummy device References: <1412858385-11954-1-git-send-email-daniel.baluta@intel.com> <1412858385-11954-2-git-send-email-daniel.baluta@intel.com> In-Reply-To: <1412858385-11954-2-git-send-email-daniel.baluta@intel.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 09/10/14 13:39, Daniel Baluta wrote: > We need a way to store events generated by iio_dummy_evgen module, > in order to correctly process IRQs in iio_simple_dummy_events. > > For the moment, we add two registers: > > * id_reg - ID register, stores the source of the event > * id_data - DATA register, stores the type of the event > > e.g echo 4 > /sys/bus/iio/devices/iio_evgen/poke2 > > id_reg 0x02, id_data 0x04 > > This means, event of type 4 was generated by fake device 2. > > We currently use a hardcoded mapping of virtual events to IIO events. > > Signed-off-by: Irina Tirdea > Signed-off-by: Daniel Baluta Applied to the togreg branch of iio.git. Initially pushed out as testing for the autobuilders to play with it. > --- > drivers/staging/iio/iio_dummy_evgen.c | 16 ++++++++++++++++ > drivers/staging/iio/iio_dummy_evgen.h | 6 ++++++ > drivers/staging/iio/iio_simple_dummy.h | 2 ++ > drivers/staging/iio/iio_simple_dummy_events.c | 23 ++++++++++++++++++----- > 4 files changed, 42 insertions(+), 5 deletions(-) > > diff --git a/drivers/staging/iio/iio_dummy_evgen.c b/drivers/staging/iio/iio_dummy_evgen.c > index 5a804f1..d44f138 100644 > --- a/drivers/staging/iio/iio_dummy_evgen.c > +++ b/drivers/staging/iio/iio_dummy_evgen.c > @@ -33,6 +33,7 @@ > * @base: base of irq range > * @enabled: mask of which irqs are enabled > * @inuse: mask of which irqs are connected > + * @regs: irq regs we are faking > * @lock: protect the evgen state > */ > struct iio_dummy_eventgen { > @@ -40,6 +41,7 @@ struct iio_dummy_eventgen { > int base; > bool enabled[IIO_EVENTGEN_NO]; > bool inuse[IIO_EVENTGEN_NO]; > + struct iio_dummy_regs regs[IIO_EVENTGEN_NO]; > struct mutex lock; > }; > > @@ -136,6 +138,12 @@ int iio_dummy_evgen_release_irq(int irq) > } > EXPORT_SYMBOL_GPL(iio_dummy_evgen_release_irq); > > +struct iio_dummy_regs *iio_dummy_evgen_get_regs(int irq) > +{ > + return &iio_evgen->regs[irq - iio_evgen->base]; > +} > +EXPORT_SYMBOL_GPL(iio_dummy_evgen_get_regs); > + > static void iio_dummy_evgen_free(void) > { > irq_free_descs(iio_evgen->base, IIO_EVENTGEN_NO); > @@ -153,6 +161,14 @@ static ssize_t iio_evgen_poke(struct device *dev, > size_t len) > { > struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); > + unsigned long event, ret; > + > + ret = kstrtoul(buf, 10, &event); > + if (ret) > + return ret; > + > + iio_evgen->regs[this_attr->address].reg_id = this_attr->address; > + iio_evgen->regs[this_attr->address].reg_data = event; > > if (iio_evgen->enabled[this_attr->address]) > handle_nested_irq(iio_evgen->base + this_attr->address); > diff --git a/drivers/staging/iio/iio_dummy_evgen.h b/drivers/staging/iio/iio_dummy_evgen.h > index d8845e2..3ef3a1c 100644 > --- a/drivers/staging/iio/iio_dummy_evgen.h > +++ b/drivers/staging/iio/iio_dummy_evgen.h > @@ -1,2 +1,8 @@ > +struct iio_dummy_regs { > + u32 reg_id; > + u32 reg_data; > +}; > + > +struct iio_dummy_regs *iio_dummy_evgen_get_regs(int irq); > int iio_dummy_evgen_get_irq(void); > int iio_dummy_evgen_release_irq(int irq); > diff --git a/drivers/staging/iio/iio_simple_dummy.h b/drivers/staging/iio/iio_simple_dummy.h > index b126196..1a74e26 100644 > --- a/drivers/staging/iio/iio_simple_dummy.h > +++ b/drivers/staging/iio/iio_simple_dummy.h > @@ -11,6 +11,7 @@ > #include > > struct iio_dummy_accel_calibscale; > +struct iio_dummy_regs; > > /** > * struct iio_dummy_state - device instance specific state. > @@ -33,6 +34,7 @@ struct iio_dummy_state { > int accel_calibbias; > const struct iio_dummy_accel_calibscale *accel_calibscale; > struct mutex lock; > + struct iio_dummy_regs *regs; > #ifdef CONFIG_IIO_SIMPLE_DUMMY_EVENTS > int event_irq; > int event_val; > diff --git a/drivers/staging/iio/iio_simple_dummy_events.c b/drivers/staging/iio/iio_simple_dummy_events.c > index 64b45b0..719dfa5 100644 > --- a/drivers/staging/iio/iio_simple_dummy_events.c > +++ b/drivers/staging/iio/iio_simple_dummy_events.c > @@ -148,12 +148,23 @@ int iio_simple_dummy_write_event_value(struct iio_dev *indio_dev, > static irqreturn_t iio_simple_dummy_event_handler(int irq, void *private) > { > struct iio_dev *indio_dev = private; > + struct iio_dummy_state *st = iio_priv(indio_dev); > + > + dev_dbg(&indio_dev->dev, "id %x event %x\n", > + st->regs->reg_id, st->regs->reg_data); > + > + switch (st->regs->reg_data) { > + case 0: > + iio_push_event(indio_dev, > + IIO_EVENT_CODE(IIO_VOLTAGE, 0, 0, > + IIO_EV_DIR_RISING, > + IIO_EV_TYPE_THRESH, 0, 0, 0), > + iio_get_time_ns()); > + break; > + default: > + break; > + } > > - iio_push_event(indio_dev, > - IIO_EVENT_CODE(IIO_VOLTAGE, 0, 0, > - IIO_EV_DIR_RISING, > - IIO_EV_TYPE_THRESH, 0, 0, 0), > - iio_get_time_ns()); > return IRQ_HANDLED; > } > > @@ -179,6 +190,8 @@ int iio_simple_dummy_events_register(struct iio_dev *indio_dev) > ret = st->event_irq; > goto error_ret; > } > + st->regs = iio_dummy_evgen_get_regs(st->event_irq); > + > ret = request_threaded_irq(st->event_irq, > NULL, > &iio_simple_dummy_event_handler, > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/