device connection: Find device connections also from device graphs
If connections between devices are described in OF graph or ACPI device graph, we can find them by using the fwnode_graph_*() functions. Acked-by: Hans de Goede <hdegoede@redhat.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Reviewed-by: Jun Li <jun.li@nxp.com> Tested-by: Jun Li <jun.li@nxp.com> Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
6a0bbcf96b
commit
637e9e52b1
|
@ -7,10 +7,37 @@
|
|||
*/
|
||||
|
||||
#include <linux/device.h>
|
||||
#include <linux/property.h>
|
||||
|
||||
static DEFINE_MUTEX(devcon_lock);
|
||||
static LIST_HEAD(devcon_list);
|
||||
|
||||
typedef void *(*devcon_match_fn_t)(struct device_connection *con, int ep,
|
||||
void *data);
|
||||
|
||||
static void *
|
||||
fwnode_graph_devcon_match(struct fwnode_handle *fwnode, const char *con_id,
|
||||
void *data, devcon_match_fn_t match)
|
||||
{
|
||||
struct device_connection con = { .id = con_id };
|
||||
struct fwnode_handle *ep;
|
||||
void *ret;
|
||||
|
||||
fwnode_graph_for_each_endpoint(fwnode, ep) {
|
||||
con.fwnode = fwnode_graph_get_remote_port_parent(ep);
|
||||
if (!fwnode_device_is_available(con.fwnode))
|
||||
continue;
|
||||
|
||||
ret = match(&con, -1, data);
|
||||
fwnode_handle_put(con.fwnode);
|
||||
if (ret) {
|
||||
fwnode_handle_put(ep);
|
||||
return ret;
|
||||
}
|
||||
}
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/**
|
||||
* device_connection_find_match - Find physical connection to a device
|
||||
* @dev: Device with the connection
|
||||
|
@ -23,10 +50,9 @@ static LIST_HEAD(devcon_list);
|
|||
* caller is expecting to be returned.
|
||||
*/
|
||||
void *device_connection_find_match(struct device *dev, const char *con_id,
|
||||
void *data,
|
||||
void *(*match)(struct device_connection *con,
|
||||
int ep, void *data))
|
||||
void *data, devcon_match_fn_t match)
|
||||
{
|
||||
struct fwnode_handle *fwnode = dev_fwnode(dev);
|
||||
const char *devname = dev_name(dev);
|
||||
struct device_connection *con;
|
||||
void *ret = NULL;
|
||||
|
@ -35,6 +61,12 @@ void *device_connection_find_match(struct device *dev, const char *con_id,
|
|||
if (!match)
|
||||
return NULL;
|
||||
|
||||
if (fwnode) {
|
||||
ret = fwnode_graph_devcon_match(fwnode, con_id, data, match);
|
||||
if (ret)
|
||||
return ret;
|
||||
}
|
||||
|
||||
mutex_lock(&devcon_lock);
|
||||
|
||||
list_for_each_entry(con, &devcon_list, list) {
|
||||
|
|
Loading…
Reference in a new issue