diff options
Diffstat (limited to 'drivers/staging/iio/iio_dummy_evgen.c')
| -rw-r--r-- | drivers/staging/iio/iio_dummy_evgen.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/drivers/staging/iio/iio_dummy_evgen.c b/drivers/staging/iio/iio_dummy_evgen.c index 6d38854c38c8..9e83f348df51 100644 --- a/drivers/staging/iio/iio_dummy_evgen.c +++ b/drivers/staging/iio/iio_dummy_evgen.c @@ -24,9 +24,21 @@ #include "iio_dummy_evgen.h" #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> +#include <linux/irq_work.h> /* Fiddly bit of faking and irq without hardware */ #define IIO_EVENTGEN_NO 10 + +/** + * struct iio_dummy_handle_irq - helper struct to simulate interrupt generation + * @work: irq_work used to run handlers from hardirq context + * @irq: fake irq line number to trigger an interrupt + */ +struct iio_dummy_handle_irq { + struct irq_work work; + int irq; +}; + /** * struct iio_dummy_evgen - evgen state * @chip: irq chip we are faking @@ -35,6 +47,7 @@ * @inuse: mask of which irqs are connected * @regs: irq regs we are faking * @lock: protect the evgen state + * @handler: helper for a 'hardware-like' interrupt simulation */ struct iio_dummy_eventgen { struct irq_chip chip; @@ -43,6 +56,7 @@ struct iio_dummy_eventgen { bool inuse[IIO_EVENTGEN_NO]; struct iio_dummy_regs regs[IIO_EVENTGEN_NO]; struct mutex lock; + struct iio_dummy_handle_irq handler; }; /* We can only ever have one instance of this 'device' */ @@ -67,6 +81,14 @@ static void iio_dummy_event_irqunmask(struct irq_data *d) evgen->enabled[d->irq - evgen->base] = true; } +static void iio_dummy_work_handler(struct irq_work *work) +{ + struct iio_dummy_handle_irq *irq_handler; + + irq_handler = container_of(work, struct iio_dummy_handle_irq, work); + handle_simple_irq(irq_to_desc(irq_handler->irq)); +} + static int iio_dummy_evgen_create(void) { int ret, i; @@ -91,6 +113,7 @@ static int iio_dummy_evgen_create(void) IRQ_NOREQUEST | IRQ_NOAUTOEN, IRQ_NOPROBE); } + init_irq_work(&iio_evgen->handler.work, iio_dummy_work_handler); mutex_init(&iio_evgen->lock); return 0; } @@ -169,8 +192,9 @@ static ssize_t iio_evgen_poke(struct device *dev, iio_evgen->regs[this_attr->address].reg_id = this_attr->address; iio_evgen->regs[this_attr->address].reg_data = event; + iio_evgen->handler.irq = iio_evgen->base + this_attr->address; if (iio_evgen->enabled[this_attr->address]) - handle_nested_irq(iio_evgen->base + this_attr->address); + irq_work_queue(&iio_evgen->handler.work); return len; } |