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Date: Sat, 25 Oct 2014 20:27:13 +0100
From: Jonathan Cameron <jic23@...nel.org>
To: Daniel Baluta <daniel.baluta@...el.com>
CC: irina.tirdea@...el.com, linux-iio@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH v2 6/7] iio: dummy: Demonstrate the usage of new channel
types
On 09/10/14 13:39, Daniel Baluta wrote:
> Adds support for the new channel types in the dummy driver:
> * a new channel IIO_ACTIVITY
> * two state transition events (running and walking)
> * a new channel IIO_STEPS and support for reading and writing
> pedometer step counter
> * step detect event
> * a new channel IIO_HEIGHT and support for reading and writing
> height
>
> Signed-off-by: Irina Tirdea <irina.tirdea@...el.com>
> Signed-off-by: Daniel Baluta <daniel.baluta@...el.com>
This looks fine, allowing for changes due to suggestions / discussions
about earlier patches.
> ---
> drivers/staging/iio/iio_simple_dummy.c | 199 +++++++++++++++++++++++---
> drivers/staging/iio/iio_simple_dummy.h | 5 +
> drivers/staging/iio/iio_simple_dummy_events.c | 38 +++++
> 3 files changed, 223 insertions(+), 19 deletions(-)
>
> diff --git a/drivers/staging/iio/iio_simple_dummy.c b/drivers/staging/iio/iio_simple_dummy.c
> index bf78e6f..5430aed 100644
> --- a/drivers/staging/iio/iio_simple_dummy.c
> +++ b/drivers/staging/iio/iio_simple_dummy.c
> @@ -69,6 +69,34 @@ static const struct iio_event_spec iio_dummy_event = {
> .mask_separate = BIT(IIO_EV_INFO_VALUE) | BIT(IIO_EV_INFO_ENABLE),
> };
>
> +/*
> + * simple step detect event - triggered when a step is detected
> + */
> +static const struct iio_event_spec step_detect_event = {
> + .type = IIO_EV_TYPE_INSTANCE,
> + .dir = IIO_EV_DIR_NONE,
> + .mask_separate = BIT(IIO_EV_INFO_ENABLE),
> +};
> +
> +/*
> + * simple transition event - triggered when the reported running confidence
> + * value rises above a threshold value
> + */
> +static const struct iio_event_spec iio_running_event = {
> + .type = IIO_EV_TYPE_TRANSITION,
> + .dir = IIO_EV_DIR_RISING,
> + .mask_separate = BIT(IIO_EV_INFO_VALUE) | BIT(IIO_EV_INFO_ENABLE),
> +};
> +
> +/*
> + * simple transition event - triggered when the reported walking confidence
> + * value falls under a threshold value
> + */
> +static const struct iio_event_spec iio_walking_event = {
> + .type = IIO_EV_TYPE_TRANSITION,
> + .dir = IIO_EV_DIR_FALLING,
> + .mask_separate = BIT(IIO_EV_INFO_VALUE) | BIT(IIO_EV_INFO_ENABLE),
> +};
> #endif
>
> /*
> @@ -215,6 +243,42 @@ static const struct iio_chan_spec iio_dummy_channels[] = {
> .indexed = 1,
> .channel = 0,
> },
> + {
> + .type = IIO_STEPS,
> + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_ENABLE),
> + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
> + .scan_index = -1,
> +#ifdef CONFIG_IIO_SIMPLE_DUMMY_EVENTS
> + .event_spec = &step_detect_event,
> + .num_event_specs = 1,
> +#endif /* CONFIG_IIO_SIMPLE_DUMMY_EVENTS */
> + },
> + {
> + .type = IIO_HEIGHT,
> + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
> + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),
> + .scan_index = -1,
> + },
> + {
> + .type = IIO_ACTIVITY,
> + .modified = 1,
> + .channel2 = IIO_MOD_RUNNING,
> + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
> +#ifdef CONFIG_IIO_SIMPLE_DUMMY_EVENTS
> + .event_spec = &iio_running_event,
> + .num_event_specs = 1,
> +#endif /* CONFIG_IIO_SIMPLE_DUMMY_EVENTS */
> + },
> + {
> + .type = IIO_ACTIVITY,
> + .modified = 1,
> + .channel2 = IIO_MOD_WALKING,
> + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
> +#ifdef CONFIG_IIO_SIMPLE_DUMMY_EVENTS
> + .event_spec = &iio_walking_event,
> + .num_event_specs = 1,
> +#endif /* CONFIG_IIO_SIMPLE_DUMMY_EVENTS */
> + },
> };
>
> /**
> @@ -259,6 +323,34 @@ static int iio_dummy_read_raw(struct iio_dev *indio_dev,
> *val = st->accel_val;
> ret = IIO_VAL_INT;
> break;
> + case IIO_HEIGHT:
> + *val = st->height;
> + ret = IIO_VAL_INT;
> + break;
> + default:
> + break;
> + }
> + break;
> + case IIO_CHAN_INFO_PROCESSED:
> + switch (chan->type) {
> + case IIO_STEPS:
> + *val = st->steps;
> + ret = IIO_VAL_INT;
> + break;
> + case IIO_ACTIVITY:
> + switch (chan->channel2) {
> + case IIO_MOD_RUNNING:
> + *val = st->activity_running;
> + ret = IIO_VAL_INT;
> + break;
> + case IIO_MOD_WALKING:
> + *val = st->activity_walking;
> + ret = IIO_VAL_INT;
> + break;
> + default:
> + break;
> + }
> + break;
> default:
> break;
> }
> @@ -269,18 +361,29 @@ static int iio_dummy_read_raw(struct iio_dev *indio_dev,
> ret = IIO_VAL_INT;
> break;
> case IIO_CHAN_INFO_SCALE:
> - switch (chan->differential) {
> - case 0:
> - /* only single ended adc -> 0.001333 */
> - *val = 0;
> - *val2 = 1333;
> - ret = IIO_VAL_INT_PLUS_MICRO;
> + switch (chan->type) {
> + case IIO_VOLTAGE:
> + switch (chan->differential) {
> + case 0:
> + /* only single ended adc -> 0.001333 */
> + *val = 0;
> + *val2 = 1333;
> + ret = IIO_VAL_INT_PLUS_MICRO;
> + break;
> + case 1:
> + /* all differential adc channels ->
> + * 0.000001344 */
> + *val = 0;
> + *val2 = 1344;
> + ret = IIO_VAL_INT_PLUS_NANO;
> + }
> + break;
> + case IIO_HEIGHT:
> + *val = 1;
> + ret = IIO_VAL_INT;
> + break;
> + default:
> break;
> - case 1:
> - /* all differential adc channels -> 0.000001344 */
> - *val = 0;
> - *val2 = 1344;
> - ret = IIO_VAL_INT_PLUS_NANO;
> }
> break;
> case IIO_CHAN_INFO_CALIBBIAS:
> @@ -298,6 +401,16 @@ static int iio_dummy_read_raw(struct iio_dev *indio_dev,
> *val2 = 33;
> ret = IIO_VAL_INT_PLUS_NANO;
> break;
> + case IIO_CHAN_INFO_ENABLE:
> + switch (chan->type) {
> + case IIO_STEPS:
> + *val = st->steps_enabled;
> + ret = IIO_VAL_INT;
> + break;
> + default:
> + break;
> + }
> + break;
> default:
> break;
> }
> @@ -330,14 +443,50 @@ static int iio_dummy_write_raw(struct iio_dev *indio_dev,
>
> switch (mask) {
> case IIO_CHAN_INFO_RAW:
> - if (chan->output == 0)
> + switch (chan->type) {
> + case IIO_VOLTAGE:
> + if (chan->output == 0)
> + return -EINVAL;
> +
> + /* Locking not required as writing single value */
> + mutex_lock(&st->lock);
> + st->dac_val = val;
> + mutex_unlock(&st->lock);
> + return 0;
> + case IIO_HEIGHT:
> + mutex_lock(&st->lock);
> + st->height = val;
> + mutex_unlock(&st->lock);
> + return 0;
> + default:
> return -EINVAL;
> -
> - /* Locking not required as writing single value */
> - mutex_lock(&st->lock);
> - st->dac_val = val;
> - mutex_unlock(&st->lock);
> - return 0;
> + }
> + case IIO_CHAN_INFO_PROCESSED:
> + switch (chan->type) {
> + case IIO_STEPS:
> + mutex_lock(&st->lock);
> + st->steps = val;
> + mutex_unlock(&st->lock);
> + return 0;
> + case IIO_ACTIVITY:
> + if (val < 0)
> + val = 0;
> + if (val > 100)
> + val = 100;
> + switch (chan->channel2) {
> + case IIO_MOD_RUNNING:
> + st->activity_running = val;
> + return 0;
> + case IIO_MOD_WALKING:
> + st->activity_walking = val;
> + return 0;
> + default:
> + return -EINVAL;
> + }
> + break;
> + default:
> + return -EINVAL;
> + }
> case IIO_CHAN_INFO_CALIBSCALE:
> mutex_lock(&st->lock);
> /* Compare against table - hard matching here */
> @@ -356,7 +505,16 @@ static int iio_dummy_write_raw(struct iio_dev *indio_dev,
> st->accel_calibbias = val;
> mutex_unlock(&st->lock);
> return 0;
> -
> + case IIO_CHAN_INFO_ENABLE:
> + switch (chan->type) {
> + case IIO_STEPS:
> + mutex_lock(&st->lock);
> + st->steps_enabled = val;
> + mutex_unlock(&st->lock);
> + return 0;
> + default:
> + return -EINVAL;
> + }
> default:
> return -EINVAL;
> }
> @@ -395,6 +553,9 @@ static int iio_dummy_init_device(struct iio_dev *indio_dev)
> st->accel_val = 34;
> st->accel_calibbias = -7;
> st->accel_calibscale = &dummy_scales[0];
> + st->steps = 47;
> + st->activity_running = 98;
> + st->activity_walking = 4;
>
> return 0;
> }
> diff --git a/drivers/staging/iio/iio_simple_dummy.h b/drivers/staging/iio/iio_simple_dummy.h
> index 1a74e26..d49aec3 100644
> --- a/drivers/staging/iio/iio_simple_dummy.h
> +++ b/drivers/staging/iio/iio_simple_dummy.h
> @@ -32,9 +32,14 @@ struct iio_dummy_state {
> int differential_adc_val[2];
> int accel_val;
> int accel_calibbias;
> + int activity_running;
> + int activity_walking;
> const struct iio_dummy_accel_calibscale *accel_calibscale;
> struct mutex lock;
> struct iio_dummy_regs *regs;
> + int steps_enabled;
> + int steps;
> + int height;
> #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 719dfa5..ae37620 100644
> --- a/drivers/staging/iio/iio_simple_dummy_events.c
> +++ b/drivers/staging/iio/iio_simple_dummy_events.c
> @@ -66,12 +66,23 @@ int iio_simple_dummy_write_event_config(struct iio_dev *indio_dev,
> */
> switch (chan->type) {
> case IIO_VOLTAGE:
> + case IIO_ACTIVITY:
> switch (type) {
> case IIO_EV_TYPE_THRESH:
> if (dir == IIO_EV_DIR_RISING)
> st->event_en = state;
> else
> return -EINVAL;
> + case IIO_EV_TYPE_TRANSITION:
> + st->event_en = state;
> + break;
> + default:
> + return -EINVAL;
> + }
> + case IIO_STEPS:
> + switch (type) {
> + case IIO_EV_TYPE_INSTANCE:
> + st->event_en = state;
> break;
> default:
> return -EINVAL;
> @@ -161,6 +172,33 @@ static irqreturn_t iio_simple_dummy_event_handler(int irq, void *private)
> IIO_EV_TYPE_THRESH, 0, 0, 0),
> iio_get_time_ns());
> break;
> + case 1:
> + if (st->activity_running > st->event_val)
> + iio_push_event(indio_dev,
> + IIO_EVENT_CODE(IIO_ACTIVITY, 0,
> + IIO_MOD_RUNNING,
> + IIO_EV_DIR_RISING,
> + IIO_EV_TYPE_TRANSITION,
> + 0, 0, 0),
> + iio_get_time_ns());
> + break;
> + case 2:
> + if (st->activity_walking < st->event_val)
> + iio_push_event(indio_dev,
> + IIO_EVENT_CODE(IIO_ACTIVITY, 0,
> + IIO_MOD_WALKING,
> + IIO_EV_DIR_FALLING,
> + IIO_EV_TYPE_TRANSITION,
> + 0, 0, 0),
> + iio_get_time_ns());
> + break;
> + case 3:
> + iio_push_event(indio_dev,
> + IIO_EVENT_CODE(IIO_STEPS, 0, IIO_NO_MOD,
> + IIO_EV_DIR_NONE,
> + IIO_EV_TYPE_INSTANCE, 0, 0, 0),
> + iio_get_time_ns());
> + break;
> default:
> break;
> }
>
--
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