diff options
Diffstat (limited to 'drivers/hwtracing/coresight/coresight-platform.c')
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-platform.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/hwtracing/coresight/coresight-platform.c b/drivers/hwtracing/coresight/coresight-platform.c index 3c5bee429105..43418a2126ff 100644 --- a/drivers/hwtracing/coresight/coresight-platform.c +++ b/drivers/hwtracing/coresight/coresight-platform.c @@ -57,6 +57,26 @@ coresight_find_device_by_fwnode(struct fwnode_handle *fwnode) return bus_find_device_by_fwnode(&amba_bustype, fwnode); } +/* + * Find a registered coresight device from a device fwnode. + * The node info is associated with the AMBA parent, but the + * csdev keeps a copy so iterate round the coresight bus to + * find the device. + */ +struct coresight_device * +coresight_find_csdev_by_fwnode(struct fwnode_handle *r_fwnode) +{ + struct device *dev; + struct coresight_device *csdev = NULL; + + dev = bus_find_device_by_fwnode(&coresight_bustype, r_fwnode); + if (dev) { + csdev = to_coresight_device(dev); + put_device(dev); + } + return csdev; +} + #ifdef CONFIG_OF static inline bool of_coresight_legacy_ep_is_input(struct device_node *ep) { |