mirror of
https://github.com/Fishwaldo/linux-bl808.git
synced 2025-06-17 20:25:19 +00:00
coresight: Expose device connections via sysfs
Coresight device connections are a bit complicated and is not exposed currently to the user. One has to look at the platform descriptions (DT bindings or ACPI bindings) to make an understanding. Given the new naming scheme, it will be helpful to have this information to choose the appropriate devices for tracing. This patch exposes the device connections via links in the sysfs directories. e.g, for a connection devA[OutputPort_X] -> devB[InputPort_Y] is represented as two symlinks: /sys/bus/coresight/.../devA/out:X -> /sys/bus/coresight/.../devB /sys/bus/coresight/.../devB/in:Y -> /sys/bus/coresight/.../devA Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> [Revised to use the generic sysfs links functions & link structures. Provides a connections sysfs group in each device to hold the links.] Co-developed-by: Mike Leach <mike.leach@linaro.org> Signed-off-by: Mike Leach <mike.leach@linaro.org> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Link: https://lore.kernel.org/r/20200518180242.7916-5-mathieu.poirier@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
8096152588
commit
8a7365c2d4
4 changed files with 121 additions and 12 deletions
|
@ -140,12 +140,14 @@ struct coresight_desc {
|
|||
* @chid_fwnode: remote component's fwnode handle.
|
||||
* @child_dev: a @coresight_device representation of the component
|
||||
connected to @outport.
|
||||
* @link: Representation of the connection as a sysfs link.
|
||||
*/
|
||||
struct coresight_connection {
|
||||
int outport;
|
||||
int child_port;
|
||||
struct fwnode_handle *child_fwnode;
|
||||
struct coresight_device *child_dev;
|
||||
struct coresight_sysfs_link *link;
|
||||
};
|
||||
|
||||
/**
|
||||
|
|
Loading…
Add table
Add a link
Reference in a new issue