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Subject[PATCH v4 5/7] iio: core: move channel list & group to private iio device object
Date
This change bit straightforward and simple, since the
'channel_attr_list' & 'chan_attr_group' fields are only used in
'industrialio-core.c'.

This change moves to the private IIO device object

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
drivers/iio/industrialio-core.c | 46 +++++++++++++++++++--------------
include/linux/iio/iio-opaque.h | 5 ++++
include/linux/iio/iio.h | 5 ----
3 files changed, 31 insertions(+), 25 deletions(-)

diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index 64174052641a..21fbb187ee79 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -1137,6 +1137,7 @@ static int iio_device_add_info_mask_type(struct iio_dev *indio_dev,
enum iio_shared_by shared_by,
const long *infomask)
{
+ struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
int i, ret, attrcount = 0;

for_each_set_bit(i, infomask, sizeof(*infomask)*8) {
@@ -1149,7 +1150,7 @@ static int iio_device_add_info_mask_type(struct iio_dev *indio_dev,
i,
shared_by,
&indio_dev->dev,
- &indio_dev->channel_attr_list);
+ &iio_dev_opaque->channel_attr_list);
if ((ret == -EBUSY) && (shared_by != IIO_SEPARATE))
continue;
else if (ret < 0)
@@ -1165,6 +1166,7 @@ static int iio_device_add_info_mask_type_avail(struct iio_dev *indio_dev,
enum iio_shared_by shared_by,
const long *infomask)
{
+ struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
int i, ret, attrcount = 0;
char *avail_postfix;

@@ -1184,7 +1186,7 @@ static int iio_device_add_info_mask_type_avail(struct iio_dev *indio_dev,
i,
shared_by,
&indio_dev->dev,
- &indio_dev->channel_attr_list);
+ &iio_dev_opaque->channel_attr_list);
kfree(avail_postfix);
if ((ret == -EBUSY) && (shared_by != IIO_SEPARATE))
continue;
@@ -1199,6 +1201,7 @@ static int iio_device_add_info_mask_type_avail(struct iio_dev *indio_dev,
static int iio_device_add_channel_sysfs(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan)
{
+ struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
int ret, attrcount = 0;
const struct iio_chan_spec_ext_info *ext_info;

@@ -1274,7 +1277,7 @@ static int iio_device_add_channel_sysfs(struct iio_dev *indio_dev,
i,
ext_info->shared,
&indio_dev->dev,
- &indio_dev->channel_attr_list);
+ &iio_dev_opaque->channel_attr_list);
i++;
if (ret == -EBUSY && ext_info->shared)
continue;
@@ -1409,6 +1412,7 @@ static DEVICE_ATTR(current_timestamp_clock, S_IRUGO | S_IWUSR,

static int iio_device_register_sysfs(struct iio_dev *indio_dev)
{
+ struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
int i, ret = 0, attrcount, attrn, attrcount_orig = 0;
struct iio_dev_attr *p;
struct attribute **attr, *clk = NULL;
@@ -1448,47 +1452,49 @@ static int iio_device_register_sysfs(struct iio_dev *indio_dev)
if (clk)
attrcount++;

- indio_dev->chan_attr_group.attrs = kcalloc(attrcount + 1,
- sizeof(indio_dev->chan_attr_group.attrs[0]),
- GFP_KERNEL);
- if (indio_dev->chan_attr_group.attrs == NULL) {
+ iio_dev_opaque->chan_attr_group.attrs =
+ kcalloc(attrcount + 1,
+ sizeof(iio_dev_opaque->chan_attr_group.attrs[0]),
+ GFP_KERNEL);
+ if (iio_dev_opaque->chan_attr_group.attrs == NULL) {
ret = -ENOMEM;
goto error_clear_attrs;
}
/* Copy across original attributes */
if (indio_dev->info->attrs)
- memcpy(indio_dev->chan_attr_group.attrs,
+ memcpy(iio_dev_opaque->chan_attr_group.attrs,
indio_dev->info->attrs->attrs,
- sizeof(indio_dev->chan_attr_group.attrs[0])
+ sizeof(iio_dev_opaque->chan_attr_group.attrs[0])
*attrcount_orig);
attrn = attrcount_orig;
/* Add all elements from the list. */
- list_for_each_entry(p, &indio_dev->channel_attr_list, l)
- indio_dev->chan_attr_group.attrs[attrn++] = &p->dev_attr.attr;
+ list_for_each_entry(p, &iio_dev_opaque->channel_attr_list, l)
+ iio_dev_opaque->chan_attr_group.attrs[attrn++] = &p->dev_attr.attr;
if (indio_dev->name)
- indio_dev->chan_attr_group.attrs[attrn++] = &dev_attr_name.attr;
+ iio_dev_opaque->chan_attr_group.attrs[attrn++] = &dev_attr_name.attr;
if (indio_dev->label)
- indio_dev->chan_attr_group.attrs[attrn++] = &dev_attr_label.attr;
+ iio_dev_opaque->chan_attr_group.attrs[attrn++] = &dev_attr_label.attr;
if (clk)
- indio_dev->chan_attr_group.attrs[attrn++] = clk;
+ iio_dev_opaque->chan_attr_group.attrs[attrn++] = clk;

indio_dev->groups[indio_dev->groupcounter++] =
- &indio_dev->chan_attr_group;
+ &iio_dev_opaque->chan_attr_group;

return 0;

error_clear_attrs:
- iio_free_chan_devattr_list(&indio_dev->channel_attr_list);
+ iio_free_chan_devattr_list(&iio_dev_opaque->channel_attr_list);

return ret;
}

static void iio_device_unregister_sysfs(struct iio_dev *indio_dev)
{
+ struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);

- iio_free_chan_devattr_list(&indio_dev->channel_attr_list);
- kfree(indio_dev->chan_attr_group.attrs);
- indio_dev->chan_attr_group.attrs = NULL;
+ iio_free_chan_devattr_list(&iio_dev_opaque->channel_attr_list);
+ kfree(iio_dev_opaque->chan_attr_group.attrs);
+ iio_dev_opaque->chan_attr_group.attrs = NULL;
}

static void iio_dev_release(struct device *device)
@@ -1543,7 +1549,7 @@ struct iio_dev *iio_device_alloc(struct device *parent, int sizeof_priv)
dev_set_drvdata(&dev->dev, (void *)dev);
mutex_init(&dev->mlock);
mutex_init(&dev->info_exist_lock);
- INIT_LIST_HEAD(&dev->channel_attr_list);
+ INIT_LIST_HEAD(&iio_dev_opaque->channel_attr_list);

dev->id = ida_simple_get(&iio_ida, 0, 0, GFP_KERNEL);
if (dev->id < 0) {
diff --git a/include/linux/iio/iio-opaque.h b/include/linux/iio/iio-opaque.h
index b3f234b4c1e9..9419a05c698d 100644
--- a/include/linux/iio/iio-opaque.h
+++ b/include/linux/iio/iio-opaque.h
@@ -6,6 +6,9 @@
/**
* struct iio_dev_opaque - industrial I/O device opaque information
* @indio_dev: public industrial I/O device information
+ * @channel_attr_list: keep track of automatically created channel
+ * attributes
+ * @chan_attr_group: group for all attrs in base directory
* @debugfs_dentry: device specific debugfs dentry
* @cached_reg_addr: cached register address for debugfs reads
* @read_buf: read buffer to be used for the initial reg read
@@ -13,6 +16,8 @@
*/
struct iio_dev_opaque {
struct iio_dev indio_dev;
+ struct list_head channel_attr_list;
+ struct attribute_group chan_attr_group;
#if defined(CONFIG_DEBUG_FS)
struct dentry *debugfs_dentry;
unsigned cached_reg_addr;
diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h
index bb0aae11a111..30e6fc1506ea 100644
--- a/include/linux/iio/iio.h
+++ b/include/linux/iio/iio.h
@@ -506,9 +506,6 @@ struct iio_buffer_setup_ops {
* @pollfunc_event: [DRIVER] function run on events trigger being received
* @channels: [DRIVER] channel specification structure table
* @num_channels: [DRIVER] number of channels specified in @channels.
- * @channel_attr_list: [INTERN] keep track of automatically created channel
- * attributes
- * @chan_attr_group: [INTERN] group for all attrs in base directory
* @name: [DRIVER] name of the device.
* @label: [DRIVER] unique name to identify which device this is
* @info: [DRIVER] callbacks and constant info from driver
@@ -551,8 +548,6 @@ struct iio_dev {
struct iio_chan_spec const *channels;
int num_channels;

- struct list_head channel_attr_list;
- struct attribute_group chan_attr_group;
const char *name;
const char *label;
const struct iio_info *info;
--
2.17.1
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