diff options
Diffstat (limited to 'drivers/hwtracing/coresight/coresight-platform.c')
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-platform.c | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/drivers/hwtracing/coresight/coresight-platform.c b/drivers/hwtracing/coresight/coresight-platform.c index 9c05f787278b..257ad48925a1 100644 --- a/drivers/hwtracing/coresight/coresight-platform.c +++ b/drivers/hwtracing/coresight/coresight-platform.c @@ -70,6 +70,35 @@ coresight_add_out_conn(struct device *dev, } EXPORT_SYMBOL_GPL(coresight_add_out_conn); +/* + * Add an input connection reference to @out_conn in the target's in_conns array + * + * @out_conn: Existing output connection to store as an input on the + * connection's remote device. + */ +int coresight_add_in_conn(struct coresight_connection *out_conn) +{ + int i; + struct device *dev = out_conn->dest_dev->dev.parent; + struct coresight_platform_data *pdata = out_conn->dest_dev->pdata; + + for (i = 0; i < pdata->nr_inconns; ++i) + if (!pdata->in_conns[i]) { + pdata->in_conns[i] = out_conn; + return 0; + } + + pdata->nr_inconns++; + pdata->in_conns = + devm_krealloc_array(dev, pdata->in_conns, pdata->nr_inconns, + sizeof(*pdata->in_conns), GFP_KERNEL); + if (!pdata->in_conns) + return -ENOMEM; + pdata->in_conns[pdata->nr_inconns - 1] = out_conn; + return 0; +} +EXPORT_SYMBOL_GPL(coresight_add_in_conn); + static struct device * coresight_find_device_by_fwnode(struct fwnode_handle *fwnode) { @@ -240,7 +269,7 @@ static int of_coresight_get_cpu(struct device *dev) /* * of_coresight_parse_endpoint : Parse the given output endpoint @ep - * and fill the connection information in @conn + * and fill the connection information in @pdata->out_conns * * Parses the local port, remote device name and the remote port. * |