From: Alexandru Ardelean <alexandru.ardelean@analog.com>
To: <linux-iio@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Cc: <lars@metafoo.de>, <jic23@kernel.org>,
Alexandru Ardelean <alexandru.ardelean@analog.com>
Subject: [RFC PATCH 08/12] iio: buffer: add helper to get the IIO device to which a buffer belongs
Date: Tue, 17 Nov 2020 18:23:36 +0200 [thread overview]
Message-ID: <20201117162340.43924-9-alexandru.ardelean@analog.com> (raw)
In-Reply-To: <20201117162340.43924-1-alexandru.ardelean@analog.com>
This is useful for drivers that may have a reference to an IIO buffer, to
be able to get a reference back to the IIO device.
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
---
drivers/iio/industrialio-buffer.c | 14 ++++++++++++++
include/linux/iio/buffer.h | 2 ++
2 files changed, 16 insertions(+)
diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c
index 8b4b7baf21da..342e5432f7d9 100644
--- a/drivers/iio/industrialio-buffer.c
+++ b/drivers/iio/industrialio-buffer.c
@@ -1736,6 +1736,20 @@ void iio_buffer_put(struct iio_buffer *buffer)
}
EXPORT_SYMBOL_GPL(iio_buffer_put);
+/**
+ * iio_buffer_get_iio_dev - Get the IIO device to which this buffer belongs to
+ * @buffer: The buffer for which to retrieve the IIO device
+ *
+ * This function retrieves the IIO device to which this IIO buffer is attached
+ * to. Given that an IIO device may have multiple IIO buffers, it's useful
+ * for some drivers to obtain a reference back to the IIO device.
+ */
+struct iio_dev *iio_buffer_get_iio_dev(struct iio_buffer *buffer)
+{
+ return buffer->indio_dev;
+}
+EXPORT_SYMBOL_GPL(iio_buffer_get_iio_dev);
+
/**
* iio_device_attach_buffer - Attach a buffer to a IIO device
* @indio_dev: The device the buffer should be attached to
diff --git a/include/linux/iio/buffer.h b/include/linux/iio/buffer.h
index 8febc23f5f26..b27d8c81f32c 100644
--- a/include/linux/iio/buffer.h
+++ b/include/linux/iio/buffer.h
@@ -11,6 +11,8 @@
struct iio_buffer;
+struct iio_dev *iio_buffer_get_iio_dev(struct iio_buffer *buffer);
+
int iio_push_to_buffers(struct iio_dev *indio_dev, const void *data);
/**
--
2.17.1
next prev parent reply other threads:[~2020-11-17 16:19 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-17 16:23 [RFC PATCH 00/12] iio: core,buffer: add support for multiple IIO buffers per IIO device Alexandru Ardelean
2020-11-17 16:23 ` [RFC PATCH 01/12] iio: core: register chardev only if needed Alexandru Ardelean
2020-11-21 18:02 ` Jonathan Cameron
2020-11-23 12:10 ` Alexandru Ardelean
2020-11-17 16:23 ` [RFC PATCH 02/12] iio: buffer: add back-ref from iio_buffer to iio_dev Alexandru Ardelean
2020-11-17 16:23 ` [RFC PATCH 03/12] iio: buffer: rework buffer & scan_elements dir creation Alexandru Ardelean
2020-11-21 18:24 ` Jonathan Cameron
2020-11-23 12:21 ` Alexandru Ardelean
2020-11-17 16:23 ` [RFC PATCH 04/12] iio: buffer: add index to the first IIO buffer dir and symlink it back Alexandru Ardelean
2020-11-21 18:27 ` Jonathan Cameron
2020-11-17 16:23 ` [RFC PATCH 05/12] iio: core: split __iio_device_attr_init() to init only the attr object Alexandru Ardelean
2020-11-17 16:23 ` [RFC PATCH 06/12] iio: buffer: re-route scan_elements via it's kobj_type Alexandru Ardelean
2020-11-21 18:33 ` Jonathan Cameron
2020-11-23 12:22 ` Alexandru Ardelean
2020-11-17 16:23 ` [RFC PATCH 07/12] iio: buffer: re-route core buffer attributes via it's new kobj_type Alexandru Ardelean
2020-11-17 16:23 ` Alexandru Ardelean [this message]
2020-11-17 16:23 ` [RFC PATCH 09/12] iio: re-route all buffer attributes through new buffer kobj_type Alexandru Ardelean
2020-11-17 16:23 ` [RFC PATCH 10/12] iio: core: wrap iio device & buffer into struct for character devices Alexandru Ardelean
2020-11-17 16:23 ` [RFC PATCH 11/12] iio: buffer: introduce support for attaching more IIO buffers Alexandru Ardelean
2020-11-21 18:44 ` Jonathan Cameron
2020-11-23 12:27 ` Alexandru Ardelean
2020-11-17 16:23 ` [RFC PATCH 12/12] iio: buffer: add ioctl() to support opening extra buffers for IIO device Alexandru Ardelean
2020-11-21 18:50 ` Jonathan Cameron
2020-11-23 12:54 ` Alexandru Ardelean
2020-11-21 18:52 ` [RFC PATCH 00/12] iio: core,buffer: add support for multiple IIO buffers per " Jonathan Cameron
2020-11-23 13:03 ` Alexandru Ardelean
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