diff options
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/Kconfig | 6 | ||||
| -rw-r--r-- | drivers/iio/Makefile | 2 | ||||
| -rw-r--r-- | drivers/iio/industrialio-core.c | 4 | ||||
| -rw-r--r-- | drivers/iio/industrialio-trigger.c | 12 | ||||
| -rw-r--r-- | drivers/iio/industrialio-triggered-event.c | 68 |
5 files changed, 88 insertions, 4 deletions
diff --git a/drivers/iio/Kconfig b/drivers/iio/Kconfig index 3c6c6e28a60a..6fe0d6524c9c 100644 --- a/drivers/iio/Kconfig +++ b/drivers/iio/Kconfig @@ -38,6 +38,12 @@ config IIO_CONSUMERS_PER_TRIGGER This value controls the maximum number of consumers that a given trigger may handle. Default is 2. +config IIO_TRIGGERED_EVENT + tristate + select IIO_TRIGGER + help + Provides helper functions for setting up triggered events. + source "drivers/iio/accel/Kconfig" source "drivers/iio/adc/Kconfig" source "drivers/iio/amplifiers/Kconfig" diff --git a/drivers/iio/Makefile b/drivers/iio/Makefile index 7ddb988338ec..40995f366843 100644 --- a/drivers/iio/Makefile +++ b/drivers/iio/Makefile @@ -7,6 +7,8 @@ industrialio-y := industrialio-core.o industrialio-event.o inkern.o industrialio-$(CONFIG_IIO_BUFFER) += industrialio-buffer.o industrialio-$(CONFIG_IIO_TRIGGER) += industrialio-trigger.o +obj-$(CONFIG_IIO_TRIGGERED_EVENT) += industrialio-triggered-event.o + obj-y += accel/ obj-y += adc/ obj-y += amplifiers/ diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c index b347524d1b6d..bef690ed0480 100644 --- a/drivers/iio/industrialio-core.c +++ b/drivers/iio/industrialio-core.c @@ -962,7 +962,7 @@ static void iio_device_unregister_sysfs(struct iio_dev *indio_dev) static void iio_dev_release(struct device *device) { struct iio_dev *indio_dev = dev_to_iio_dev(device); - if (indio_dev->modes & INDIO_BUFFER_TRIGGERED) + if (indio_dev->modes & (INDIO_BUFFER_TRIGGERED | INDIO_EVENT_TRIGGERED)) iio_device_unregister_trigger_consumer(indio_dev); iio_device_unregister_eventset(indio_dev); iio_device_unregister_sysfs(indio_dev); @@ -1243,7 +1243,7 @@ int iio_device_register(struct iio_dev *indio_dev) "Failed to register event set\n"); goto error_free_sysfs; } - if (indio_dev->modes & INDIO_BUFFER_TRIGGERED) + if (indio_dev->modes & (INDIO_BUFFER_TRIGGERED | INDIO_EVENT_TRIGGERED)) iio_device_register_trigger_consumer(indio_dev); if ((indio_dev->modes & INDIO_ALL_BUFFER_MODES) && diff --git a/drivers/iio/industrialio-trigger.c b/drivers/iio/industrialio-trigger.c index 570606c2adbd..ae2806aafb72 100644 --- a/drivers/iio/industrialio-trigger.c +++ b/drivers/iio/industrialio-trigger.c @@ -366,10 +366,18 @@ static ssize_t iio_trigger_write_current(struct device *dev, indio_dev->trig = trig; - if (oldtrig) + if (oldtrig) { + if (indio_dev->modes & INDIO_EVENT_TRIGGERED) + iio_trigger_detach_poll_func(oldtrig, + indio_dev->pollfunc_event); iio_trigger_put(oldtrig); - if (indio_dev->trig) + } + if (indio_dev->trig) { iio_trigger_get(indio_dev->trig); + if (indio_dev->modes & INDIO_EVENT_TRIGGERED) + iio_trigger_attach_poll_func(indio_dev->trig, + indio_dev->pollfunc_event); + } return len; } diff --git a/drivers/iio/industrialio-triggered-event.c b/drivers/iio/industrialio-triggered-event.c new file mode 100644 index 000000000000..8cc254fac16a --- /dev/null +++ b/drivers/iio/industrialio-triggered-event.c @@ -0,0 +1,68 @@ +/* + * Copyright (C) 2015 Cogent Embedded, Inc. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include <linux/kernel.h> +#include <linux/export.h> +#include <linux/module.h> +#include <linux/iio/iio.h> +#include <linux/iio/triggered_event.h> +#include <linux/iio/trigger_consumer.h> + +/** + * iio_triggered_event_setup() - Setup pollfunc_event for triggered event + * @indio_dev: IIO device structure + * @h: Function which will be used as pollfunc_event top half + * @thread: Function which will be used as pollfunc_event bottom half + * + * This function combines some common tasks which will normally be performed + * when setting up a triggered event. It will allocate the pollfunc_event and + * set mode to use it for triggered event. + * + * Before calling this function the indio_dev structure should already be + * completely initialized, but not yet registered. In practice this means that + * this function should be called right before iio_device_register(). + * + * To free the resources allocated by this function call + * iio_triggered_event_cleanup(). + */ +int iio_triggered_event_setup(struct iio_dev *indio_dev, + irqreturn_t (*h)(int irq, void *p), + irqreturn_t (*thread)(int irq, void *p)) +{ + indio_dev->pollfunc_event = iio_alloc_pollfunc(h, + thread, + IRQF_ONESHOT, + indio_dev, + "%s_consumer%d", + indio_dev->name, + indio_dev->id); + if (indio_dev->pollfunc_event == NULL) + return -ENOMEM; + + /* Flag that events polling is possible */ + indio_dev->modes |= INDIO_EVENT_TRIGGERED; + + return 0; +} +EXPORT_SYMBOL(iio_triggered_event_setup); + +/** + * iio_triggered_event_cleanup() - Free resources allocated by iio_triggered_event_setup() + * @indio_dev: IIO device structure + */ +void iio_triggered_event_cleanup(struct iio_dev *indio_dev) +{ + indio_dev->modes &= ~INDIO_EVENT_TRIGGERED; + iio_dealloc_pollfunc(indio_dev->pollfunc_event); +} +EXPORT_SYMBOL(iio_triggered_event_cleanup); + +MODULE_AUTHOR("Vladimir Barinov"); +MODULE_DESCRIPTION("IIO helper functions for setting up triggered events"); +MODULE_LICENSE("GPL"); |