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Date: Fri, 22 Jan 2021 18:25:24 +0200
From: Alexandru Ardelean <alexandru.ardelean@...log.com>
To: <linux-kernel@...r.kernel.org>, <linux-iio@...r.kernel.org>
CC: <lars@...afoo.de>, <Michael.Hennerich@...log.com>,
<jic23@...nel.org>, <nuno.sa@...log.com>,
<dragos.bogdan@...log.com>,
Alexandru Ardelean <alexandru.ardelean@...log.com>
Subject: [PATCH v2 07/12][RESEND] iio: buffer: re-route core buffer attributes via it's new kobj_type
For the buffer attributes that are present inside the IIO core buffer logic
we can re-route them to expand the attribute into iio_buffer objects.
The rest, will still expand to device_attributes.
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@...log.com>
---
drivers/iio/industrialio-buffer.c | 113 +++++++++++++++++-------------
1 file changed, 64 insertions(+), 49 deletions(-)
diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c
index 524b897a1877..8470921cf2fa 100644
--- a/drivers/iio/industrialio-buffer.c
+++ b/drivers/iio/industrialio-buffer.c
@@ -572,22 +572,18 @@ static int iio_buffer_add_channel_sysfs(struct iio_dev *indio_dev,
return ret;
}
-static ssize_t iio_buffer_read_length(struct device *dev,
- struct device_attribute *attr,
+static ssize_t iio_buffer_read_length(struct iio_buffer *buffer,
+ struct iio_buf_attr *attr,
char *buf)
{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- struct iio_buffer *buffer = indio_dev->buffer;
-
return sprintf(buf, "%d\n", buffer->length);
}
-static ssize_t iio_buffer_write_length(struct device *dev,
- struct device_attribute *attr,
+static ssize_t iio_buffer_write_length(struct iio_buffer *buffer,
+ struct iio_buf_attr *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_dev *indio_dev = buffer->indio_dev;
unsigned int val;
int ret;
@@ -615,13 +611,10 @@ static ssize_t iio_buffer_write_length(struct device *dev,
return ret ? ret : len;
}
-static ssize_t iio_buffer_show_enable(struct device *dev,
- struct device_attribute *attr,
+static ssize_t iio_buffer_show_enable(struct iio_buffer *buffer,
+ struct iio_buf_attr *attr,
char *buf)
{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- struct iio_buffer *buffer = indio_dev->buffer;
-
return sprintf(buf, "%d\n", iio_buffer_is_active(buffer));
}
@@ -1227,15 +1220,14 @@ void iio_disable_all_buffers(struct iio_dev *indio_dev)
iio_buffer_deactivate_all(indio_dev);
}
-static ssize_t iio_buffer_store_enable(struct device *dev,
- struct device_attribute *attr,
+static ssize_t iio_buffer_store_enable(struct iio_buffer *buffer,
+ struct iio_buf_attr *attr,
const char *buf,
size_t len)
{
int ret;
bool requested_state;
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- struct iio_buffer *buffer = indio_dev->buffer;
+ struct iio_dev *indio_dev = buffer->indio_dev;
bool inlist;
ret = strtobool(buf, &requested_state);
@@ -1260,23 +1252,19 @@ static ssize_t iio_buffer_store_enable(struct device *dev,
return (ret < 0) ? ret : len;
}
-static ssize_t iio_buffer_show_watermark(struct device *dev,
- struct device_attribute *attr,
+static ssize_t iio_buffer_show_watermark(struct iio_buffer *buffer,
+ struct iio_buf_attr *attr,
char *buf)
{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- struct iio_buffer *buffer = indio_dev->buffer;
-
return sprintf(buf, "%u\n", buffer->watermark);
}
-static ssize_t iio_buffer_store_watermark(struct device *dev,
- struct device_attribute *attr,
+static ssize_t iio_buffer_store_watermark(struct iio_buffer *buffer,
+ struct iio_buf_attr *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_dev *indio_dev = buffer->indio_dev;
unsigned int val;
int ret;
@@ -1305,36 +1293,51 @@ static ssize_t iio_buffer_store_watermark(struct device *dev,
return ret ? ret : len;
}
-static ssize_t iio_dma_show_data_available(struct device *dev,
- struct device_attribute *attr,
- char *buf)
+static ssize_t iio_dma_show_data_available(struct iio_buffer *buffer,
+ struct iio_buf_attr *attr,
+ char *buf)
{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- struct iio_buffer *buffer = indio_dev->buffer;
-
return sprintf(buf, "%zu\n", iio_buffer_data_available(buffer));
}
-static DEVICE_ATTR(length, S_IRUGO | S_IWUSR, iio_buffer_read_length,
- iio_buffer_write_length);
-static struct device_attribute dev_attr_length_ro = __ATTR(length,
+#define IIO_BUF_ATTR(_name, _mode, _show, _store) \
+ struct iio_buf_attr iio_buf_attr_##_name = \
+ __ATTR(_name, _mode, _show, _store)
+
+static IIO_BUF_ATTR(length, S_IRUGO | S_IWUSR,
+ iio_buffer_read_length, iio_buffer_write_length);
+static struct iio_buf_attr buf_attr_length_ro = __ATTR(length,
S_IRUGO, iio_buffer_read_length, NULL);
-static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR,
- iio_buffer_show_enable, iio_buffer_store_enable);
-static DEVICE_ATTR(watermark, S_IRUGO | S_IWUSR,
- iio_buffer_show_watermark, iio_buffer_store_watermark);
-static struct device_attribute dev_attr_watermark_ro = __ATTR(watermark,
+static IIO_BUF_ATTR(enable, S_IRUGO | S_IWUSR,
+ iio_buffer_show_enable, iio_buffer_store_enable);
+static IIO_BUF_ATTR(watermark, S_IRUGO | S_IWUSR,
+ iio_buffer_show_watermark, iio_buffer_store_watermark);
+static struct iio_buf_attr buf_attr_watermark_ro = __ATTR(watermark,
S_IRUGO, iio_buffer_show_watermark, NULL);
-static DEVICE_ATTR(data_available, S_IRUGO,
- iio_dma_show_data_available, NULL);
+static IIO_BUF_ATTR(data_available, S_IRUGO,
+ iio_dma_show_data_available, NULL);
static struct attribute *iio_buffer_attrs[] = {
- &dev_attr_length.attr,
- &dev_attr_enable.attr,
- &dev_attr_watermark.attr,
- &dev_attr_data_available.attr,
+ &iio_buf_attr_length.attr,
+ &iio_buf_attr_enable.attr,
+ &iio_buf_attr_watermark.attr,
+ &iio_buf_attr_data_available.attr,
};
+static bool iio_buffer_attr_is_core(struct attribute *attr)
+{
+ struct attribute *a;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(iio_buffer_attrs); i++) {
+ a = iio_buffer_attrs[i];
+ if (!strcmp(attr->name, a->name))
+ return true;
+ }
+
+ return false;
+}
+
#define to_dev_attr(_attr) container_of(_attr, struct device_attribute, attr)
#define to_iio_buf_attr(_attr) container_of(_attr, struct iio_buf_attr, attr)
@@ -1344,6 +1347,12 @@ static ssize_t iio_buffer_dir_attr_show(struct kobject *kobj,
{
struct iio_buffer *buffer = container_of(kobj, struct iio_buffer, buffer_dir);
struct device_attribute *dattr;
+ struct iio_buf_attr *battr;
+
+ if (iio_buffer_attr_is_core(attr)) {
+ battr = to_iio_buf_attr(attr);
+ return battr->show(buffer, battr, buf);
+ }
dattr = to_dev_attr(attr);
@@ -1357,6 +1366,12 @@ static ssize_t iio_buffer_dir_attr_store(struct kobject *kobj,
{
struct iio_buffer *buffer = container_of(kobj, struct iio_buffer, buffer_dir);
struct device_attribute *dattr;
+ struct iio_buf_attr *battr;
+
+ if (iio_buffer_attr_is_core(attr)) {
+ battr = to_iio_buf_attr(attr);
+ return battr->store(buffer, battr, buf, len);
+ }
dattr = to_dev_attr(attr);
@@ -1476,10 +1491,10 @@ static int __iio_buffer_alloc_sysfs_and_mask(struct iio_buffer *buffer,
memcpy(attr, iio_buffer_attrs, sizeof(iio_buffer_attrs));
if (!buffer->access->set_length)
- attr[0] = &dev_attr_length_ro.attr;
+ attr[0] = &buf_attr_length_ro.attr;
if (buffer->access->flags & INDIO_BUFFER_FLAG_FIXED_WATERMARK)
- attr[2] = &dev_attr_watermark_ro.attr;
+ attr[2] = &buf_attr_watermark_ro.attr;
if (buffer->attrs)
memcpy(&attr[ARRAY_SIZE(iio_buffer_attrs)], buffer->attrs,
--
2.17.1
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