| Message ID | 20230116173420.1278704-6-mw@semihalf.com |
|---|---|
| State | New |
| Headers | show |
| Series | DSA: switch to fwnode_/device_ | expand |
On Mon, Jan 16, 2023 at 06:34:17PM +0100, Marcin Wojtas wrote: > Add a new generic routine fwnode_find_parent_dev_match that can be used > e.g. as a callback for class_find_device(). It searches for the struct > device corresponding to a struct fwnode_handle by iterating over device > and its parents. If it helps you, I have no objections, hence Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> > Signed-off-by: Marcin Wojtas <mw@semihalf.com> > --- > include/linux/property.h | 1 + > drivers/base/property.c | 23 ++++++++++++++++++++ > 2 files changed, 24 insertions(+) > > diff --git a/include/linux/property.h b/include/linux/property.h > index 37179e3abad5..4ae20d7c5103 100644 > --- a/include/linux/property.h > +++ b/include/linux/property.h > @@ -109,6 +109,7 @@ struct device *fwnode_get_next_parent_dev(struct fwnode_handle *fwnode); > unsigned int fwnode_count_parents(const struct fwnode_handle *fwn); > struct fwnode_handle *fwnode_get_nth_parent(struct fwnode_handle *fwn, > unsigned int depth); > +int fwnode_find_parent_dev_match(struct device *dev, const void *data); > bool fwnode_is_ancestor_of(struct fwnode_handle *ancestor, struct fwnode_handle *child); > struct fwnode_handle *fwnode_get_next_child_node( > const struct fwnode_handle *fwnode, struct fwnode_handle *child); > diff --git a/drivers/base/property.c b/drivers/base/property.c > index bbb3e499ff4a..84849d4934cc 100644 > --- a/drivers/base/property.c > +++ b/drivers/base/property.c > @@ -693,6 +693,29 @@ struct fwnode_handle *fwnode_get_nth_parent(struct fwnode_handle *fwnode, > } > EXPORT_SYMBOL_GPL(fwnode_get_nth_parent); > > +/** > + * fwnode_find_parent_dev_match - look for a device matching the struct fwnode_handle > + * @dev: the struct device to initiate the search > + * @data: pointer passed for comparison > + * > + * Looks up the device structure corresponding with the fwnode by iterating > + * over @dev and its parents. > + * The routine can be used e.g. as a callback for class_find_device(). > + * > + * Returns: %1 - match is found > + * %0 - match not found > + */ > +int fwnode_find_parent_dev_match(struct device *dev, const void *data) > +{ > + for (; dev; dev = dev->parent) { > + if (device_match_fwnode(dev, data)) > + return 1; > + } > + > + return 0; > +} > +EXPORT_SYMBOL_GPL(fwnode_find_parent_dev_match); > + > /** > * fwnode_is_ancestor_of - Test if @ancestor is ancestor of @child > * @ancestor: Firmware which is tested for being an ancestor > -- > 2.29.0 >
diff --git a/include/linux/property.h b/include/linux/property.h index 37179e3abad5..4ae20d7c5103 100644 --- a/include/linux/property.h +++ b/include/linux/property.h @@ -109,6 +109,7 @@ struct device *fwnode_get_next_parent_dev(struct fwnode_handle *fwnode); unsigned int fwnode_count_parents(const struct fwnode_handle *fwn); struct fwnode_handle *fwnode_get_nth_parent(struct fwnode_handle *fwn, unsigned int depth); +int fwnode_find_parent_dev_match(struct device *dev, const void *data); bool fwnode_is_ancestor_of(struct fwnode_handle *ancestor, struct fwnode_handle *child); struct fwnode_handle *fwnode_get_next_child_node( const struct fwnode_handle *fwnode, struct fwnode_handle *child); diff --git a/drivers/base/property.c b/drivers/base/property.c index bbb3e499ff4a..84849d4934cc 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -693,6 +693,29 @@ struct fwnode_handle *fwnode_get_nth_parent(struct fwnode_handle *fwnode, } EXPORT_SYMBOL_GPL(fwnode_get_nth_parent); +/** + * fwnode_find_parent_dev_match - look for a device matching the struct fwnode_handle + * @dev: the struct device to initiate the search + * @data: pointer passed for comparison + * + * Looks up the device structure corresponding with the fwnode by iterating + * over @dev and its parents. + * The routine can be used e.g. as a callback for class_find_device(). + * + * Returns: %1 - match is found + * %0 - match not found + */ +int fwnode_find_parent_dev_match(struct device *dev, const void *data) +{ + for (; dev; dev = dev->parent) { + if (device_match_fwnode(dev, data)) + return 1; + } + + return 0; +} +EXPORT_SYMBOL_GPL(fwnode_find_parent_dev_match); + /** * fwnode_is_ancestor_of - Test if @ancestor is ancestor of @child * @ancestor: Firmware which is tested for being an ancestor
Add a new generic routine fwnode_find_parent_dev_match that can be used e.g. as a callback for class_find_device(). It searches for the struct device corresponding to a struct fwnode_handle by iterating over device and its parents. Signed-off-by: Marcin Wojtas <mw@semihalf.com> --- include/linux/property.h | 1 + drivers/base/property.c | 23 ++++++++++++++++++++ 2 files changed, 24 insertions(+)