UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

device property: Implement fwnode_graph_get_endpoint_count() 

Add fwnode_graph_get_endpoint_count() function to provide generic
implementation of of_graph_get_endpoint_count(). The former by default
only counts endpoints to available devices which is consistent with the
rest of the fwnode graph API. By providing FWNODE_GRAPH_DEVICE_DISABLED
flag, also unconnected endpoints and endpoints to disabled devices are
counted.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Sakari Ailus 2021-12-01 14:59:33 +02:00 committed by Rafael J. Wysocki
parent 59f3f98284
commit c87b8fc569
2 changed files with 41 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

49
drivers/base/property.c
View File

@ -1049,6 +1049,18 @@ fwnode_graph_get_remote_node(const struct fwnode_handle *fwnode, u32 port_id,
}
EXPORT_SYMBOL_GPL(fwnode_graph_get_remote_node);
static bool fwnode_graph_remote_available(struct fwnode_handle *ep)
{
struct fwnode_handle *dev_node;
bool available;
dev_node = fwnode_graph_get_remote_port_parent(ep);
available = fwnode_device_is_available(dev_node);
fwnode_handle_put(dev_node);
return available;
}
/**
* fwnode_graph_get_endpoint_by_id - get endpoint by port and endpoint numbers
* @fwnode: parent fwnode_handle containing the graph
@ -1082,16 +1094,8 @@ fwnode_graph_get_endpoint_by_id(const struct fwnode_handle *fwnode,
struct fwnode_endpoint fwnode_ep = { 0 };
int ret;
if (enabled_only) {
struct fwnode_handle *dev_node;
bool available;
dev_node = fwnode_graph_get_remote_port_parent(ep);
available = fwnode_device_is_available(dev_node);
fwnode_handle_put(dev_node);
if (!available)
continue;
}
if (enabled_only && !fwnode_graph_remote_available(ep))
continue;
ret = fwnode_graph_parse_endpoint(ep, &fwnode_ep);
if (ret < 0)
@ -1124,6 +1128,31 @@ fwnode_graph_get_endpoint_by_id(const struct fwnode_handle *fwnode,
}
EXPORT_SYMBOL_GPL(fwnode_graph_get_endpoint_by_id);
/**
* fwnode_graph_get_endpoint_count - Count endpoints on a device node
* @fwnode: The node related to a device
* @flags: fwnode lookup flags
* Count endpoints in a device node.
*
* If FWNODE_GRAPH_DEVICE_DISABLED flag is specified, also unconnected endpoints
* and endpoints connected to disabled devices are counted.
*/
unsigned int fwnode_graph_get_endpoint_count(struct fwnode_handle *fwnode,
unsigned long flags)
{
struct fwnode_handle *ep;
unsigned int count = 0;
fwnode_graph_for_each_endpoint(fwnode, ep) {
if (flags & FWNODE_GRAPH_DEVICE_DISABLED ||
fwnode_graph_remote_available(ep))
count++;
}
return count;
}
EXPORT_SYMBOL_GPL(fwnode_graph_get_endpoint_count);
/**
* fwnode_graph_parse_endpoint - parse common endpoint node properties
* @fwnode: pointer to endpoint fwnode_handle

2
include/linux/property.h
View File

@ -423,6 +423,8 @@ static inline bool fwnode_graph_is_endpoint(struct fwnode_handle *fwnode)
struct fwnode_handle *
fwnode_graph_get_endpoint_by_id(const struct fwnode_handle *fwnode,
u32 port, u32 endpoint, unsigned long flags);
unsigned int fwnode_graph_get_endpoint_count(struct fwnode_handle *fwnode,
unsigned long flags);
#define fwnode_graph_for_each_endpoint(fwnode, child) \
for (child = NULL; \