From: Jonathan Cameron <jic23@cam.ac.uk>
Date: Wed, 18 May 2011 13:41:38 +0000 (+0100)
Subject: staging:iio:adc:ad7606 conversion to irq_chip based polling.
X-Git-Tag: firefly_0821_release~7613^2~1326^2~64
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=13cfac2038438bf98a649a5c92ed56e4534a0d84;p=firefly-linux-kernel-4.4.55.git

staging:iio:adc:ad7606 conversion to irq_chip based polling.

I'm far from sure what the best way to handle this particular
part is, so have (I think) done the absolute minimum to change
it to the new interface.

V2: Trivial constification of device name.

Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/drivers/staging/iio/adc/ad7606.h b/drivers/staging/iio/adc/ad7606.h
index 338bade801a7..c90009040b7e 100644
--- a/drivers/staging/iio/adc/ad7606.h
+++ b/drivers/staging/iio/adc/ad7606.h
@@ -50,7 +50,7 @@ struct ad7606_platform_data {
  */
 
 struct ad7606_chip_info {
-	char				name[10];
+	const char			*name;
 	u8				bits;
 	char				sign;
 	u16				int_vref_mv;
diff --git a/drivers/staging/iio/adc/ad7606_core.c b/drivers/staging/iio/adc/ad7606_core.c
index 7ef9a6f48073..27090b9b587d 100644
--- a/drivers/staging/iio/adc/ad7606_core.c
+++ b/drivers/staging/iio/adc/ad7606_core.c
@@ -458,6 +458,7 @@ struct ad7606_state *ad7606_probe(struct device *dev, int irq,
 	st->indio_dev->dev_data = (void *)(st);
 	st->indio_dev->driver_module = THIS_MODULE;
 	st->indio_dev->modes = INDIO_DIRECT_MODE;
+	st->indio_dev->name = st->chip_info->name;
 
 	init_waitqueue_head(&st->wq_data_avail);
 
diff --git a/drivers/staging/iio/adc/ad7606_ring.c b/drivers/staging/iio/adc/ad7606_ring.c
index b32cb0dea6d8..43caced22cee 100644
--- a/drivers/staging/iio/adc/ad7606_ring.c
+++ b/drivers/staging/iio/adc/ad7606_ring.c
@@ -157,16 +157,19 @@ static int ad7606_ring_preenable(struct iio_dev *indio_dev)
 }
 
 /**
- * ad7606_poll_func_th() th of trigger launched polling to ring buffer
+ * ad7606_trigger_handler_th() th of trigger launched polling to ring buffer
  *
  **/
-static void ad7606_poll_func_th(struct iio_dev *indio_dev, s64 time)
+static irqreturn_t ad7606_trigger_handler_th(int irq, void *p)
 {
+	struct iio_poll_func *pf = p;
+	struct iio_dev *indio_dev = pf->private_data;
 	struct ad7606_state *st = indio_dev->dev_data;
 	gpio_set_value(st->pdata->gpio_convst, 1);
 
-	return;
+	return IRQ_HANDLED;
 }
+
 /**
  * ad7606_poll_bh_to_ring() bh of trigger launched polling to ring buffer
  * @work_s:	the work struct through which this was scheduled
@@ -245,10 +248,20 @@ int ad7606_register_ring_funcs_and_init(struct iio_dev *indio_dev)
 
 	/* Effectively select the ring buffer implementation */
 	iio_ring_sw_register_funcs(&indio_dev->ring->access);
-	ret = iio_alloc_pollfunc(indio_dev, NULL, &ad7606_poll_func_th);
-	if (ret)
+	indio_dev->pollfunc = kzalloc(sizeof(*indio_dev->pollfunc), GFP_KERNEL);
+	if (indio_dev->pollfunc == NULL) {
+		ret = -ENOMEM;
 		goto error_deallocate_sw_rb;
-
+	}
+	indio_dev->pollfunc->private_data = indio_dev;
+	indio_dev->pollfunc->h = &ad7606_trigger_handler_th;
+	indio_dev->pollfunc->name =
+		kasprintf(GFP_KERNEL, "%s_consumer%d", indio_dev->name,
+			  indio_dev->id);
+	if (indio_dev->pollfunc->name == NULL) {
+		ret = -ENOMEM;
+		goto error_free_poll_func;
+	}
 	/* Ring buffer functions - here trigger setup related */
 
 	indio_dev->ring->preenable = &ad7606_ring_preenable;
@@ -262,6 +275,8 @@ int ad7606_register_ring_funcs_and_init(struct iio_dev *indio_dev)
 	/* Flag that polled ring buffering is possible */
 	indio_dev->modes |= INDIO_RING_TRIGGERED;
 	return 0;
+error_free_poll_func:
+	kfree(indio_dev->pollfunc);
 error_deallocate_sw_rb:
 	iio_sw_rb_free(indio_dev->ring);
 error_ret:
@@ -275,6 +290,7 @@ void ad7606_ring_cleanup(struct iio_dev *indio_dev)
 		iio_trigger_dettach_poll_func(indio_dev->trig,
 					      indio_dev->pollfunc);
 	}
+	kfree(indio_dev->pollfunc->name);
 	kfree(indio_dev->pollfunc);
 	iio_sw_rb_free(indio_dev->ring);
 }