1 // SPDX-License-Identifier: GPL-2.0
4  *  Author: Lars-Peter Clausen <lars@metafoo.de>
12 #include <linux/iio/iio.h>
13 #include <linux/iio/consumer.h>
14 #include <linux/iio/hw-consumer.h>
15 #include <linux/iio/buffer_impl.h>
18  * struct iio_hw_consumer - IIO hw consumer block
20  * @channels: IIO provider channels.
58 	list_for_each_entry(buf, &hwc->buffers, head) {  in iio_hw_consumer_get_buffer()
59 		if (buf->indio_dev == indio_dev)  in iio_hw_consumer_get_buffer()
67 	buf->buffer.access = &iio_hw_buf_access;  in iio_hw_consumer_get_buffer()
68 	buf->indio_dev = indio_dev;  in iio_hw_consumer_get_buffer()
69 	buf->buffer.scan_mask = buf->scan_mask;  in iio_hw_consumer_get_buffer()
71 	iio_buffer_init(&buf->buffer);  in iio_hw_consumer_get_buffer()
72 	list_add_tail(&buf->head, &hwc->buffers);  in iio_hw_consumer_get_buffer()
78  * iio_hw_consumer_alloc() - Allocate IIO hardware consumer
79  * @dev: Pointer to consumer device.
92 		return ERR_PTR(-ENOMEM);  in iio_hw_consumer_alloc()
94 	INIT_LIST_HEAD(&hwc->buffers);  in iio_hw_consumer_alloc()
96 	hwc->channels = iio_channel_get_all(dev);  in iio_hw_consumer_alloc()
97 	if (IS_ERR(hwc->channels)) {  in iio_hw_consumer_alloc()
98 		ret = PTR_ERR(hwc->channels);  in iio_hw_consumer_alloc()
102 	chan = &hwc->channels[0];  in iio_hw_consumer_alloc()
103 	while (chan->indio_dev) {  in iio_hw_consumer_alloc()
104 		buf = iio_hw_consumer_get_buffer(hwc, chan->indio_dev);  in iio_hw_consumer_alloc()
106 			ret = -ENOMEM;  in iio_hw_consumer_alloc()
109 		set_bit(chan->channel->scan_index, buf->buffer.scan_mask);  in iio_hw_consumer_alloc()
116 	list_for_each_entry(buf, &hwc->buffers, head)  in iio_hw_consumer_alloc()
117 		iio_buffer_put(&buf->buffer);  in iio_hw_consumer_alloc()
118 	iio_channel_release_all(hwc->channels);  in iio_hw_consumer_alloc()
126  * iio_hw_consumer_free() - Free IIO hardware consumer
127  * @hwc: hw consumer to free.
133 	iio_channel_release_all(hwc->channels);  in iio_hw_consumer_free()
134 	list_for_each_entry_safe(buf, n, &hwc->buffers, head)  in iio_hw_consumer_free()
135 		iio_buffer_put(&buf->buffer);  in iio_hw_consumer_free()
146  * devm_iio_hw_consumer_alloc - Resource-managed iio_hw_consumer_alloc()
147  * @dev: Pointer to consumer device.
173  * iio_hw_consumer_enable() - Enable IIO hardware consumer
183 	list_for_each_entry(buf, &hwc->buffers, head) {  in iio_hw_consumer_enable()
184 		ret = iio_update_buffers(buf->indio_dev, &buf->buffer, NULL);  in iio_hw_consumer_enable()
192 	list_for_each_entry_continue_reverse(buf, &hwc->buffers, head)  in iio_hw_consumer_enable()
193 		iio_update_buffers(buf->indio_dev, NULL, &buf->buffer);  in iio_hw_consumer_enable()
199  * iio_hw_consumer_disable() - Disable IIO hardware consumer
206 	list_for_each_entry(buf, &hwc->buffers, head)  in iio_hw_consumer_disable()
207 		iio_update_buffers(buf->indio_dev, NULL, &buf->buffer);  in iio_hw_consumer_disable()
211 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
212 MODULE_DESCRIPTION("Hardware consumer buffer the IIO framework");