From: Jonathan Cameron Date: Wed, 18 May 2011 13:41:34 +0000 (+0100) Subject: staging:iio:accel:adis16204 move to irqchip based trigger handling. X-Git-Tag: firefly_0821_release~7613^2~1326^2~68 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=80142f0de68a3d68f114f25f56e736c4a63e1c18;p=firefly-linux-kernel-4.4.55.git staging:iio:accel:adis16204 move to irqchip based trigger handling. Untested. Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/iio/accel/adis16204.h b/drivers/staging/iio/accel/adis16204.h index e61844684f99..bdd20c6500e4 100644 --- a/drivers/staging/iio/accel/adis16204.h +++ b/drivers/staging/iio/accel/adis16204.h @@ -67,9 +67,6 @@ /** * struct adis16204_state - device instance specific data * @us: actual spi_device - * @work_trigger_to_ring: bh for triggered event handling - * @inter: used to check if new interrupt has been triggered - * @last_timestamp: passing timestamp from th to bh of interrupt handler * @indio_dev: industrial I/O device structure * @trig: data ready trigger registered with iio * @tx: transmit buffer @@ -78,8 +75,6 @@ **/ struct adis16204_state { struct spi_device *us; - struct work_struct work_trigger_to_ring; - s64 last_timestamp; struct iio_dev *indio_dev; struct iio_trigger *trig; u8 *tx; diff --git a/drivers/staging/iio/accel/adis16204_ring.c b/drivers/staging/iio/accel/adis16204_ring.c index 420b160fe3ab..035e5c4eea10 100644 --- a/drivers/staging/iio/accel/adis16204_ring.c +++ b/drivers/staging/iio/accel/adis16204_ring.c @@ -55,17 +55,6 @@ static struct attribute_group adis16204_scan_el_group = { .name = "scan_elements", }; -/** - * adis16204_poll_func_th() top half interrupt handler called by trigger - * @private_data: iio_dev - **/ -static void adis16204_poll_func_th(struct iio_dev *indio_dev, s64 timestamp) -{ - struct adis16204_state *st = iio_dev_get_devdata(indio_dev); - st->last_timestamp = timestamp; - schedule_work(&st->work_trigger_to_ring); -} - /** * adis16204_read_ring_data() read data registers which will be placed into ring * @dev: device associated with child of actual device (iio_dev or iio_trig) @@ -110,13 +99,12 @@ static int adis16204_read_ring_data(struct device *dev, u8 *rx) /* Whilst this makes a lot of calls to iio_sw_ring functions - it is to device * specific to be rolled into the core. */ -static void adis16204_trigger_bh_to_ring(struct work_struct *work_s) +static irqreturn_t adis16204_trigger_handler(int irq, void *p) { - struct adis16204_state *st - = container_of(work_s, struct adis16204_state, - work_trigger_to_ring); - struct iio_ring_buffer *ring = st->indio_dev->ring; - + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev = pf->private_data; + struct adis16204_state *st = iio_dev_get_devdata(indio_dev); + struct iio_ring_buffer *ring = indio_dev->ring; int i = 0; s16 *data; size_t datasize = ring->access.get_bytes_per_datum(ring); @@ -124,7 +112,7 @@ static void adis16204_trigger_bh_to_ring(struct work_struct *work_s) data = kmalloc(datasize, GFP_KERNEL); if (data == NULL) { dev_err(&st->us->dev, "memory alloc failed in ring bh"); - return; + return -ENOMEM; } if (ring->scan_count) @@ -135,20 +123,19 @@ static void adis16204_trigger_bh_to_ring(struct work_struct *work_s) /* Guaranteed to be aligned with 8 byte boundary */ if (ring->scan_timestamp) - *((s64 *)(data + ((i + 3)/4)*4)) = st->last_timestamp; + *((s64 *)(data + ((i + 3)/4)*4)) = pf->timestamp; - ring->access.store_to(ring, - (u8 *)data, - st->last_timestamp); + ring->access.store_to(ring, (u8 *)data, pf->timestamp); iio_trigger_notify_done(st->indio_dev->trig); kfree(data); - return; + return IRQ_HANDLED; } void adis16204_unconfigure_ring(struct iio_dev *indio_dev) { + kfree(indio_dev->pollfunc->name); kfree(indio_dev->pollfunc); iio_sw_rb_free(indio_dev->ring); } @@ -156,9 +143,7 @@ void adis16204_unconfigure_ring(struct iio_dev *indio_dev) int adis16204_configure_ring(struct iio_dev *indio_dev) { int ret = 0; - struct adis16204_state *st = indio_dev->dev_data; struct iio_ring_buffer *ring; - INIT_WORK(&st->work_trigger_to_ring, adis16204_trigger_bh_to_ring); ring = iio_sw_rb_allocate(indio_dev); if (!ring) { @@ -183,13 +168,27 @@ int adis16204_configure_ring(struct iio_dev *indio_dev) iio_scan_mask_set(ring, iio_scan_el_temp.number); iio_scan_mask_set(ring, iio_scan_el_in0.number); - ret = iio_alloc_pollfunc(indio_dev, NULL, &adis16204_poll_func_th); - if (ret) + indio_dev->pollfunc = kzalloc(sizeof(*indio_dev->pollfunc), GFP_KERNEL); + if (indio_dev->pollfunc == NULL) { + ret = -ENOMEM; goto error_iio_sw_rb_free; + } + indio_dev->pollfunc->private_data = indio_dev; + indio_dev->pollfunc->h = &iio_pollfunc_store_time; + indio_dev->pollfunc->thread = &adis16204_trigger_handler; + indio_dev->pollfunc->type = IRQF_ONESHOT; + indio_dev->pollfunc->name = + kasprintf(GFP_KERNEL, "adis16204_consumer%d", indio_dev->id); + if (indio_dev->pollfunc->name == NULL) { + ret = -ENOMEM; + goto error_free_poll_func; + } indio_dev->modes |= INDIO_RING_TRIGGERED; return 0; +error_free_poll_func: + kfree(indio_dev->pollfunc); error_iio_sw_rb_free: iio_sw_rb_free(indio_dev->ring); return ret; diff --git a/drivers/staging/iio/accel/adis16204_trigger.c b/drivers/staging/iio/accel/adis16204_trigger.c index 85c648765f2c..5f083f8147de 100644 --- a/drivers/staging/iio/accel/adis16204_trigger.c +++ b/drivers/staging/iio/accel/adis16204_trigger.c @@ -12,16 +12,6 @@ #include "../trigger.h" #include "adis16204.h" -/** - * adis16204_data_rdy_trig_poll() the event handler for the data rdy trig - **/ -static irqreturn_t adis16204_data_rdy_trig_poll(int irq, void *private) -{ - disable_irq_nosync(irq); - iio_trigger_poll(private, iio_get_time_ns()); - return IRQ_HANDLED; -} - static DEVICE_ATTR(name, S_IRUGO, iio_trigger_read_name, NULL); static struct attribute *adis16204_trigger_attrs[] = { @@ -46,63 +36,54 @@ static int adis16204_data_rdy_trigger_set_state(struct iio_trigger *trig, return adis16204_set_irq(&st->indio_dev->dev, state); } -/** - * adis16204_trig_try_reen() try renabling irq for data rdy trigger - * @trig: the datardy trigger - **/ -static int adis16204_trig_try_reen(struct iio_trigger *trig) -{ - struct adis16204_state *st = trig->private_data; - enable_irq(st->us->irq); - return 0; -} - int adis16204_probe_trigger(struct iio_dev *indio_dev) { int ret; struct adis16204_state *st = indio_dev->dev_data; + char *name; - st->trig = iio_allocate_trigger(); - if (st->trig == NULL) { + name = kasprintf(GFP_KERNEL, + "adis16204-dev%d", + indio_dev->id); + if (name == NULL) { ret = -ENOMEM; goto error_ret; } + + st->trig = iio_allocate_trigger_named(name); + if (st->trig == NULL) { + ret = -ENOMEM; + goto error_free_name; + } + ret = request_irq(st->us->irq, - adis16204_data_rdy_trig_poll, + &iio_trigger_generic_data_rdy_poll, IRQF_TRIGGER_RISING, "adis16204", st->trig); if (ret) goto error_free_trig; - st->trig->name = kasprintf(GFP_KERNEL, - "adis16204-dev%d", - indio_dev->id); - if (!st->trig->name) { - ret = -ENOMEM; - goto error_free_irq; - } st->trig->dev.parent = &st->us->dev; st->trig->owner = THIS_MODULE; st->trig->private_data = st; st->trig->set_trigger_state = &adis16204_data_rdy_trigger_set_state; - st->trig->try_reenable = &adis16204_trig_try_reen; st->trig->control_attrs = &adis16204_trigger_attr_group; ret = iio_trigger_register(st->trig); /* select default trigger */ indio_dev->trig = st->trig; if (ret) - goto error_free_trig_name; + goto error_free_irq; return 0; -error_free_trig_name: - kfree(st->trig->name); error_free_irq: free_irq(st->us->irq, st->trig); error_free_trig: iio_free_trigger(st->trig); +error_free_name: + kfree(name); error_ret: return ret; }