From: Alexandru Ardelean <alexandru.ardelean@analog.com>
To: <linux-iio@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Cc: <jic23@kernel.org>, <lars@metafoo.de>,
Alexandru Ardelean <alexandru.ardelean@analog.com>
Subject: [RFC PATCH 13/14] iio: unpack all iio buffer attributes correctly
Date: Fri, 8 May 2020 16:53:47 +0300 [thread overview]
Message-ID: <20200508135348.15229-14-alexandru.ardelean@analog.com> (raw)
In-Reply-To: <20200508135348.15229-1-alexandru.ardelean@analog.com>
WIP
This change fixes how IIO buffer attributes get unpacked.
There could be a saner way to unpack these without needed to change the
drivers that attach buffer attributes incorrectly via
iio_buffer_set_attrs()
It seems that the design idea was that there is a single buffer per IIO
device, so all drivers attached buffer attributes for FIFO to the IIO
buffer.
Now with the change to add a device object to the IIO buffer, and shifting
around the device-attributes, a 'device' object unpacks to an IIO buffer
object, which needs some special handling.'
One idea to fix this, is to get rid of iio_buffer_set_attrs() somehow.
Or, to maybe allocate some wrapper device-attributes.
With this change, IIO still needs (to work with the older ABI):
- symlink the chardev of the first IIO buffer device to the IIO device
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
---
drivers/iio/accel/adxl372.c | 6 ++-
drivers/iio/accel/bmc150-accel-core.c | 6 ++-
.../buffer/industrialio-buffer-dmaengine.c | 4 +-
drivers/iio/industrialio-buffer.c | 51 +++++++++++--------
include/linux/iio/buffer.h | 3 ++
5 files changed, 42 insertions(+), 28 deletions(-)
diff --git a/drivers/iio/accel/adxl372.c b/drivers/iio/accel/adxl372.c
index 60daf04ce188..528bce008671 100644
--- a/drivers/iio/accel/adxl372.c
+++ b/drivers/iio/accel/adxl372.c
@@ -745,7 +745,8 @@ static ssize_t adxl372_get_fifo_enabled(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct iio_buffer *buffer = dev_to_iio_buffer(dev);
+ struct iio_dev *indio_dev = iio_buffer_get_attached_iio_dev(buffer);
struct adxl372_state *st = iio_priv(indio_dev);
return sprintf(buf, "%d\n", st->fifo_mode);
@@ -755,7 +756,8 @@ static ssize_t adxl372_get_fifo_watermark(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct iio_buffer *buffer = dev_to_iio_buffer(dev);
+ struct iio_dev *indio_dev = iio_buffer_get_attached_iio_dev(buffer);
struct adxl372_state *st = iio_priv(indio_dev);
return sprintf(buf, "%d\n", st->watermark);
diff --git a/drivers/iio/accel/bmc150-accel-core.c b/drivers/iio/accel/bmc150-accel-core.c
index 121b4e89f038..c02287165980 100644
--- a/drivers/iio/accel/bmc150-accel-core.c
+++ b/drivers/iio/accel/bmc150-accel-core.c
@@ -763,7 +763,8 @@ static ssize_t bmc150_accel_get_fifo_watermark(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct iio_buffer *buffer = dev_to_iio_buffer(dev);
+ struct iio_dev *indio_dev = iio_buffer_get_attached_iio_dev(buffer);
struct bmc150_accel_data *data = iio_priv(indio_dev);
int wm;
@@ -778,7 +779,8 @@ static ssize_t bmc150_accel_get_fifo_state(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct iio_buffer *buffer = dev_to_iio_buffer(dev);
+ struct iio_dev *indio_dev = iio_buffer_get_attached_iio_dev(buffer);
struct bmc150_accel_data *data = iio_priv(indio_dev);
bool state;
diff --git a/drivers/iio/buffer/industrialio-buffer-dmaengine.c b/drivers/iio/buffer/industrialio-buffer-dmaengine.c
index 6dedf12b69a4..7728fdadcc3e 100644
--- a/drivers/iio/buffer/industrialio-buffer-dmaengine.c
+++ b/drivers/iio/buffer/industrialio-buffer-dmaengine.c
@@ -130,9 +130,9 @@ static const struct iio_dma_buffer_ops iio_dmaengine_default_ops = {
static ssize_t iio_dmaengine_buffer_get_length_align(struct device *dev,
struct device_attribute *attr, char *buf)
{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct iio_buffer *buffer = dev_to_iio_buffer(dev);
struct dmaengine_buffer *dmaengine_buffer =
- iio_buffer_to_dmaengine_buffer(indio_dev->buffer);
+ iio_buffer_to_dmaengine_buffer(buffer);
return sprintf(buf, "%zu\n", dmaengine_buffer->align);
}
diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c
index b14281442387..aa2f46c0949f 100644
--- a/drivers/iio/industrialio-buffer.c
+++ b/drivers/iio/industrialio-buffer.c
@@ -29,6 +29,19 @@ static const char * const iio_endian_prefix[] = {
[IIO_LE] = "le",
};
+struct iio_buffer *dev_to_iio_buffer(struct device *dev)
+{
+ return container_of(dev, struct iio_buffer, dev);
+}
+EXPORT_SYMBOL_GPL(dev_to_iio_buffer);
+
+struct iio_dev *iio_buffer_get_attached_iio_dev(struct iio_buffer *buffer)
+{
+ return buffer ? NULL : buffer->indio_dev;
+}
+EXPORT_SYMBOL_GPL(iio_buffer_get_attached_iio_dev);
+
+
static bool iio_buffer_is_active(struct iio_buffer *buf)
{
return !list_empty(&buf->buffer_list);
@@ -324,9 +337,8 @@ static ssize_t iio_scan_el_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
+ struct iio_buffer *buffer = dev_to_iio_buffer(dev);
int ret;
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- struct iio_buffer *buffer = indio_dev->buffer;
/* Ensure ret is 0 or 1. */
ret = !!test_bit(to_iio_dev_attr(attr)->address,
@@ -436,10 +448,10 @@ static ssize_t iio_scan_el_store(struct device *dev,
const char *buf,
size_t len)
{
+ struct iio_buffer *buffer = dev_to_iio_buffer(dev);
+ struct iio_dev *indio_dev = buffer->indio_dev;
int ret;
bool state;
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- struct iio_buffer *buffer = indio_dev->buffer;
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
ret = strtobool(buf, &state);
@@ -474,8 +486,7 @@ static ssize_t iio_scan_el_ts_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- struct iio_buffer *buffer = indio_dev->buffer;
+ struct iio_buffer *buffer = dev_to_iio_buffer(dev);
return sprintf(buf, "%d\n", buffer->scan_timestamp);
}
@@ -485,9 +496,9 @@ static ssize_t iio_scan_el_ts_store(struct device *dev,
const char *buf,
size_t len)
{
+ struct iio_buffer *buffer = dev_to_iio_buffer(dev);
+ struct iio_dev *indio_dev = buffer->indio_dev;
int ret;
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- struct iio_buffer *buffer = indio_dev->buffer;
bool state;
ret = strtobool(buf, &state);
@@ -563,8 +574,7 @@ static ssize_t iio_buffer_read_length(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- struct iio_buffer *buffer = indio_dev->buffer;
+ struct iio_buffer *buffer = dev_to_iio_buffer(dev);
return sprintf(buf, "%d\n", buffer->length);
}
@@ -573,8 +583,8 @@ static ssize_t iio_buffer_write_length(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t len)
{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- struct iio_buffer *buffer = indio_dev->buffer;
+ struct iio_buffer *buffer = dev_to_iio_buffer(dev);
+ struct iio_dev *indio_dev = buffer->indio_dev;
unsigned int val;
int ret;
@@ -606,8 +616,7 @@ static ssize_t iio_buffer_show_enable(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- struct iio_buffer *buffer = indio_dev->buffer;
+ struct iio_buffer *buffer = dev_to_iio_buffer(dev);
return sprintf(buf, "%d\n", iio_buffer_is_active(buffer));
}
@@ -1207,10 +1216,10 @@ static ssize_t iio_buffer_store_enable(struct device *dev,
const char *buf,
size_t len)
{
+ struct iio_buffer *buffer = dev_to_iio_buffer(dev);
+ struct iio_dev *indio_dev = buffer->indio_dev;
int ret;
bool requested_state;
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- struct iio_buffer *buffer = indio_dev->buffer;
bool inlist;
ret = strtobool(buf, &requested_state);
@@ -1239,8 +1248,7 @@ static ssize_t iio_buffer_show_watermark(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- struct iio_buffer *buffer = indio_dev->buffer;
+ struct iio_buffer *buffer = dev_to_iio_buffer(dev);
return sprintf(buf, "%u\n", buffer->watermark);
}
@@ -1250,8 +1258,8 @@ static ssize_t iio_buffer_store_watermark(struct device *dev,
const char *buf,
size_t len)
{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- struct iio_buffer *buffer = indio_dev->buffer;
+ struct iio_buffer *buffer = dev_to_iio_buffer(dev);
+ struct iio_dev *indio_dev = buffer->indio_dev;
unsigned int val;
int ret;
@@ -1284,8 +1292,7 @@ static ssize_t iio_dma_show_data_available(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- struct iio_buffer *buffer = indio_dev->buffer;
+ struct iio_buffer *buffer = dev_to_iio_buffer(dev);
return sprintf(buf, "%zu\n", iio_buffer_data_available(buffer));
}
diff --git a/include/linux/iio/buffer.h b/include/linux/iio/buffer.h
index fbba4093f06c..a688e98c694c 100644
--- a/include/linux/iio/buffer.h
+++ b/include/linux/iio/buffer.h
@@ -11,6 +11,9 @@
struct iio_buffer;
+struct iio_buffer *dev_to_iio_buffer(struct device *dev);
+struct iio_dev *iio_buffer_get_attached_iio_dev(struct iio_buffer *buffer);
+
void iio_buffer_set_attrs(struct iio_buffer *buffer,
const struct attribute **attrs);
--
2.17.1
next prev parent reply other threads:[~2020-05-08 13:54 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-08 13:53 [RFC PATCH 00/14] iio: buffer: add support for multiple buffers Alexandru Ardelean
2020-05-08 13:53 ` [RFC PATCH 01/14] iio: Move scan mask management to the core Alexandru Ardelean
2020-05-08 13:53 ` [RFC PATCH 02/14] iio: hw_consumer: use new scanmask functions Alexandru Ardelean
2020-05-08 13:53 ` [RFC PATCH 03/14] iio: buffer: add back-ref from iio_buffer to iio_dev Alexandru Ardelean
2020-05-08 13:53 ` [RFC PATCH 04/14] iio: core,buffer: wrap iio_buffer_put() call into iio_buffers_put() Alexandru Ardelean
2020-05-08 13:53 ` [RFC PATCH 05/14] iio: core: register chardev only if needed Alexandru Ardelean
2020-05-24 16:40 ` Jonathan Cameron
2020-05-08 13:53 ` [RFC PATCH 06/14] iio: buffer,event: duplicate chardev creation for buffers & events Alexandru Ardelean
2020-05-08 13:53 ` [RFC PATCH 07/14] iio: core: add simple centralized mechanism for ioctl() handlers Alexandru Ardelean
2020-05-24 16:45 ` Jonathan Cameron
2020-05-25 7:24 ` Ardelean, Alexandru
2020-05-08 13:53 ` [RFC PATCH 08/14] iio: core: use new common ioctl() mechanism Alexandru Ardelean
2020-05-24 16:47 ` Jonathan Cameron
2020-05-25 7:27 ` Ardelean, Alexandru
2020-05-31 15:20 ` Jonathan Cameron
2020-05-08 13:53 ` [RFC PATCH 09/14] iio: buffer: split buffer sysfs creation to take buffer as primary arg Alexandru Ardelean
2020-05-24 16:49 ` Jonathan Cameron
2020-05-25 7:28 ` Ardelean, Alexandru
2020-05-31 15:21 ` Jonathan Cameron
2020-05-08 13:53 ` [RFC PATCH 10/14] iio: buffer: remove attrcount_orig var from sysfs creation Alexandru Ardelean
2020-05-08 13:53 ` [RFC PATCH 11/14] iio: buffer: add underlying device object and convert buffers to devices Alexandru Ardelean
2020-05-08 13:53 ` [RFC PATCH 12/14] iio: buffer: symlink the scan_elements dir back into IIO device's dir Alexandru Ardelean
2020-05-08 13:53 ` Alexandru Ardelean [this message]
2020-05-24 17:28 ` [RFC PATCH 13/14] iio: unpack all iio buffer attributes correctly Jonathan Cameron
2020-05-08 13:53 ` [RFC PATCH 14/14] iio: buffer: convert single buffer to list of buffers Alexandru Ardelean
2020-05-09 8:52 ` [RFC PATCH 00/14] iio: buffer: add support for multiple buffers Lars-Peter Clausen
2020-05-10 10:09 ` Jonathan Cameron
2020-05-11 10:33 ` Ardelean, Alexandru
2020-05-11 10:37 ` Lars-Peter Clausen
2020-05-11 13:03 ` Ardelean, Alexandru
2020-05-11 13:24 ` Ardelean, Alexandru
2020-05-11 13:58 ` Lars-Peter Clausen
2020-05-11 14:56 ` Ardelean, Alexandru
2020-05-11 19:56 ` Lars-Peter Clausen
2020-05-12 6:26 ` Ardelean, Alexandru
2020-05-16 13:08 ` Ardelean, Alexandru
2020-05-16 16:24 ` Jonathan Cameron
2020-05-17 6:26 ` Ardelean, Alexandru
2020-05-17 13:40 ` Jonathan Cameron
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