On Thu, Nov 2, 2023 at 9:22 AM Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx> wrote: > > Add fwnode_name_eq() to implement the functionality of of_node_name_eq() > on fwnode property API. The same convention of ending the comparison at > '@' (besides NUL) is applied on also both ACPI and swnode. The function > is intended for comparing unit address-less node names on DT and firmware > or swnodes compliant with DT bindings. > > Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx> > Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> > Tested-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> > --- > Hi Rafael, > > Could we merge this via the media tree (pending further review comments, > if any)? This would be fine with me, so please feel free to add Acked-by: Rafael J. Wysocki <rafael@xxxxxxxxxx> to this patch (when ready), but you need to ask Greg about it, because he's been handling device properties changes lately. > There'a a patch to be merged via that tree which will depend on > fwnode_name_eq(), namely: > <URL:https://lore.kernel.org/linux-media/20231030133247.11243-1-laurent.pinchart@xxxxxxxxxxxxxxxx/T/#m489b7e83cbc755815c5002f85454a76bfb41adb2>. > > since v2: > > - Use NUL instead of '\0' and "at" instead of "to" (before "stopping > comparison"). > > drivers/base/property.c | 28 ++++++++++++++++++++++++++++ > include/linux/property.h | 1 + > 2 files changed, 29 insertions(+) > > diff --git a/drivers/base/property.c b/drivers/base/property.c > index 8667b13639d2..572e065e8797 100644 > --- a/drivers/base/property.c > +++ b/drivers/base/property.c > @@ -595,6 +595,34 @@ const char *fwnode_get_name_prefix(const struct fwnode_handle *fwnode) > return fwnode_call_ptr_op(fwnode, get_name_prefix); > } > > +/** > + * fwnode_name_eq - Return true if node name is equal > + * @fwnode: The firmware node > + * @name: The name to which to compare the node name > + * > + * Compare the name provided as an argument to the name of the node, stopping > + * the comparison at either NUL or '@' character, whichever comes first. This > + * function is generally used for comparing node names while ignoring the > + * possible unit address of the node. > + * > + * Return: true if the node name matches with the name provided in the @name > + * argument, false otherwise. > + */ > +bool fwnode_name_eq(const struct fwnode_handle *fwnode, const char *name) > +{ > + const char *node_name; > + size_t len; > + > + node_name = fwnode_get_name(fwnode); > + if (!node_name) > + return false; > + > + len = strchrnul(node_name, '@') - node_name; > + > + return str_has_prefix(node_name, name) == len; > +} > +EXPORT_SYMBOL_GPL(fwnode_name_eq); > + > /** > * fwnode_get_parent - Return parent firwmare node > * @fwnode: Firmware whose parent is retrieved > diff --git a/include/linux/property.h b/include/linux/property.h > index 083a1f41364b..096ade186601 100644 > --- a/include/linux/property.h > +++ b/include/linux/property.h > @@ -108,6 +108,7 @@ struct fwnode_handle *fwnode_find_reference(const struct fwnode_handle *fwnode, > > const char *fwnode_get_name(const struct fwnode_handle *fwnode); > const char *fwnode_get_name_prefix(const struct fwnode_handle *fwnode); > +bool fwnode_name_eq(const struct fwnode_handle *fwnode, const char *name); > > struct fwnode_handle *fwnode_get_parent(const struct fwnode_handle *fwnode); > struct fwnode_handle *fwnode_get_next_parent(struct fwnode_handle *fwnode); > -- > 2.39.2 >
