From: Alexandru Ardelean <alexandru.ardelean@analog.com>
To: <linux-kernel@vger.kernel.org>, <linux-iio@vger.kernel.org>
Cc: <lars@metafoo.de>, <Michael.Hennerich@analog.com>,
<jic23@kernel.org>, <nuno.sa@analog.com>,
<dragos.bogdan@analog.com>,
Alexandru Ardelean <alexandru.ardelean@analog.com>
Subject: [PATCH v2 08/12][RESEND] iio: buffer: add helper to get the IIO device to which a buffer belongs
Date: Fri, 22 Jan 2021 18:25:25 +0200 [thread overview]
Message-ID: <20210122162529.84978-9-alexandru.ardelean@analog.com> (raw)
In-Reply-To: <20210122162529.84978-1-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 8470921cf2fa..a2dd30567072 100644
--- a/drivers/iio/industrialio-buffer.c
+++ b/drivers/iio/industrialio-buffer.c
@@ -1778,6 +1778,20 @@ 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:[~2021-01-22 17:21 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-22 16:25 [PATCH v2 00/12][RESEND] iio: core,buffer: add support for multiple IIO buffers per IIO device Alexandru Ardelean
2021-01-22 16:25 ` [PATCH v2 01/12][RESEND] iio: core: register chardev only if needed Alexandru Ardelean
2021-01-22 16:25 ` [PATCH v2 02/12][RESEND] iio: buffer: add back-ref from iio_buffer to iio_dev Alexandru Ardelean
2021-01-22 16:25 ` [PATCH v2 03/12][RESEND] iio: buffer: rework buffer & scan_elements dir creation Alexandru Ardelean
2021-01-24 18:11 ` Jonathan Cameron
2021-01-24 19:07 ` Alexandru Ardelean
2021-01-25 19:29 ` Greg Kroah-Hartman
2021-01-25 19:28 ` Greg Kroah-Hartman
2021-01-26 9:45 ` Alexandru Ardelean
2021-01-27 14:48 ` Jonathan Cameron
2021-01-22 16:25 ` [PATCH v2 04/12][RESEND] iio: buffer: add index to the first IIO buffer dir and symlink it back Alexandru Ardelean
2021-01-22 16:25 ` [PATCH v2 05/12][RESEND] iio: core: split __iio_device_attr_init() to init only the attr object Alexandru Ardelean
2021-01-22 16:25 ` [PATCH v2 06/12][RESEND] iio: buffer: re-route scan_elements via it's kobj_type Alexandru Ardelean
2021-01-22 16:25 ` [PATCH v2 07/12][RESEND] iio: buffer: re-route core buffer attributes via it's new kobj_type Alexandru Ardelean
2021-01-22 16:25 ` Alexandru Ardelean [this message]
2021-01-22 16:25 ` [PATCH v2 09/12][RESEND] iio: re-route all buffer attributes through new buffer kobj_type Alexandru Ardelean
2021-01-22 16:25 ` [PATCH v2 10/12][RESEND] iio: core: wrap iio device & buffer into struct for character devices Alexandru Ardelean
2021-01-22 16:25 ` [PATCH v2 11/12][RESEND] iio: buffer: introduce support for attaching more IIO buffers Alexandru Ardelean
2021-01-25 11:06 ` [kbuild] " Dan Carpenter
2021-01-22 16:25 ` [PATCH v2 12/12][RESEND] iio: buffer: add ioctl() to support opening extra buffers for IIO device Alexandru Ardelean
2021-01-24 18:38 ` Jonathan Cameron
2021-01-24 19:32 ` Alexandru Ardelean
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