| Message ID | 20220422222351.1297276-2-bjorn.andersson@linaro.org |
|---|---|
| State | Accepted |
| Commit | 7a20917d30fb627bebff6bacbe860ad4eb3a04d6 |
| Headers | show |
| Series | typec: mux: Introduce support for multiple USB TypeC muxes | expand |
On Tue, Apr 26, 2022 at 12:15 PM Andy Shevchenko <andy.shevchenko@gmail.com> wrote: > > On Sat, Apr 23, 2022 at 1:25 AM Bjorn Andersson > <bjorn.andersson@linaro.org> wrote: > > > > In some cases multiple connections with the same connection id > > needs to be resolved from a fwnode graph. > > > > One such example is when separate hardware is used for performing muxing > > and/or orientation switching of the SuperSpeed and SBU lines in a USB > > Type-C connector. In this case the connector needs to belong to a graph > > with multiple matching remote endpoints, and the Type-C controller needs > > to be able to resolve them both. > > > > Add a new API that allows this kind of lookup. > > LGTM now, > Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> > thanks! For this and the next patch in the series: Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> and please feel free to route the whole lot via USB. Thanks! > > Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> > > --- > > > > Changes since v4: > > - Added "Add" to patch subject > > - Added "(Optional)" kernel-doc of fwnode_connection_find_matches() > > > > drivers/base/property.c | 109 +++++++++++++++++++++++++++++++++++++++ > > include/linux/property.h | 5 ++ > > 2 files changed, 114 insertions(+) > > > > diff --git a/drivers/base/property.c b/drivers/base/property.c > > index 36401cfe432c..babab8cec7a0 100644 > > --- a/drivers/base/property.c > > +++ b/drivers/base/property.c > > @@ -1201,6 +1201,40 @@ fwnode_graph_devcon_match(struct fwnode_handle *fwnode, const char *con_id, > > return NULL; > > } > > > > +static unsigned int fwnode_graph_devcon_matches(struct fwnode_handle *fwnode, > > + const char *con_id, void *data, > > + devcon_match_fn_t match, > > + void **matches, > > + unsigned int matches_len) > > +{ > > + struct fwnode_handle *node; > > + struct fwnode_handle *ep; > > + unsigned int count = 0; > > + void *ret; > > + > > + fwnode_graph_for_each_endpoint(fwnode, ep) { > > + if (matches && count >= matches_len) { > > + fwnode_handle_put(ep); > > + break; > > + } > > + > > + node = fwnode_graph_get_remote_port_parent(ep); > > + if (!fwnode_device_is_available(node)) { > > + fwnode_handle_put(node); > > + continue; > > + } > > + > > + ret = match(node, con_id, data); > > + fwnode_handle_put(node); > > + if (ret) { > > + if (matches) > > + matches[count] = ret; > > + count++; > > + } > > + } > > + return count; > > +} > > + > > static void * > > fwnode_devcon_match(struct fwnode_handle *fwnode, const char *con_id, > > void *data, devcon_match_fn_t match) > > @@ -1223,6 +1257,37 @@ fwnode_devcon_match(struct fwnode_handle *fwnode, const char *con_id, > > return NULL; > > } > > > > +static unsigned int fwnode_devcon_matches(struct fwnode_handle *fwnode, > > + const char *con_id, void *data, > > + devcon_match_fn_t match, > > + void **matches, > > + unsigned int matches_len) > > +{ > > + struct fwnode_handle *node; > > + unsigned int count = 0; > > + unsigned int i; > > + void *ret; > > + > > + for (i = 0; ; i++) { > > + if (matches && count >= matches_len) > > + break; > > + > > + node = fwnode_find_reference(fwnode, con_id, i); > > + if (IS_ERR(node)) > > + break; > > + > > + ret = match(node, NULL, data); > > + fwnode_handle_put(node); > > + if (ret) { > > + if (matches) > > + matches[count] = ret; > > + count++; > > + } > > + } > > + > > + return count; > > +} > > + > > /** > > * fwnode_connection_find_match - Find connection from a device node > > * @fwnode: Device node with the connection > > @@ -1250,3 +1315,47 @@ void *fwnode_connection_find_match(struct fwnode_handle *fwnode, > > return fwnode_devcon_match(fwnode, con_id, data, match); > > } > > EXPORT_SYMBOL_GPL(fwnode_connection_find_match); > > + > > +/** > > + * fwnode_connection_find_matches - Find connections from a device node > > + * @fwnode: Device node with the connection > > + * @con_id: Identifier for the connection > > + * @data: Data for the match function > > + * @match: Function to check and convert the connection description > > + * @matches: (Optional) array of pointers to fill with matches > > + * @matches_len: Length of @matches > > + * > > + * Find up to @matches_len connections with unique identifier @con_id between > > + * @fwnode and other device nodes. @match will be used to convert the > > + * connection description to data the caller is expecting to be returned > > + * through the @matches array. > > + * If @matches is NULL @matches_len is ignored and the total number of resolved > > + * matches is returned. > > + * > > + * Return: Number of matches resolved, or negative errno. > > + */ > > +int fwnode_connection_find_matches(struct fwnode_handle *fwnode, > > + const char *con_id, void *data, > > + devcon_match_fn_t match, > > + void **matches, unsigned int matches_len) > > +{ > > + unsigned int count_graph; > > + unsigned int count_ref; > > + > > + if (!fwnode || !match) > > + return -EINVAL; > > + > > + count_graph = fwnode_graph_devcon_matches(fwnode, con_id, data, match, > > + matches, matches_len); > > + > > + if (matches) { > > + matches += count_graph; > > + matches_len -= count_graph; > > + } > > + > > + count_ref = fwnode_devcon_matches(fwnode, con_id, data, match, > > + matches, matches_len); > > + > > + return count_graph + count_ref; > > +} > > +EXPORT_SYMBOL_GPL(fwnode_connection_find_matches); > > diff --git a/include/linux/property.h b/include/linux/property.h > > index fc24d45632eb..a5b429d623f6 100644 > > --- a/include/linux/property.h > > +++ b/include/linux/property.h > > @@ -451,6 +451,11 @@ static inline void *device_connection_find_match(struct device *dev, > > return fwnode_connection_find_match(dev_fwnode(dev), con_id, data, match); > > } > > > > +int fwnode_connection_find_matches(struct fwnode_handle *fwnode, > > + const char *con_id, void *data, > > + devcon_match_fn_t match, > > + void **matches, unsigned int matches_len); > > + > > /* -------------------------------------------------------------------------- */ > > /* Software fwnode support - when HW description is incomplete or missing */ > > > > -- > > 2.35.1 > > > > > -- > With Best Regards, > Andy Shevchenko
diff --git a/drivers/base/property.c b/drivers/base/property.c index 36401cfe432c..babab8cec7a0 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -1201,6 +1201,40 @@ fwnode_graph_devcon_match(struct fwnode_handle *fwnode, const char *con_id, return NULL; } +static unsigned int fwnode_graph_devcon_matches(struct fwnode_handle *fwnode, + const char *con_id, void *data, + devcon_match_fn_t match, + void **matches, + unsigned int matches_len) +{ + struct fwnode_handle *node; + struct fwnode_handle *ep; + unsigned int count = 0; + void *ret; + + fwnode_graph_for_each_endpoint(fwnode, ep) { + if (matches && count >= matches_len) { + fwnode_handle_put(ep); + break; + } + + node = fwnode_graph_get_remote_port_parent(ep); + if (!fwnode_device_is_available(node)) { + fwnode_handle_put(node); + continue; + } + + ret = match(node, con_id, data); + fwnode_handle_put(node); + if (ret) { + if (matches) + matches[count] = ret; + count++; + } + } + return count; +} + static void * fwnode_devcon_match(struct fwnode_handle *fwnode, const char *con_id, void *data, devcon_match_fn_t match) @@ -1223,6 +1257,37 @@ fwnode_devcon_match(struct fwnode_handle *fwnode, const char *con_id, return NULL; } +static unsigned int fwnode_devcon_matches(struct fwnode_handle *fwnode, + const char *con_id, void *data, + devcon_match_fn_t match, + void **matches, + unsigned int matches_len) +{ + struct fwnode_handle *node; + unsigned int count = 0; + unsigned int i; + void *ret; + + for (i = 0; ; i++) { + if (matches && count >= matches_len) + break; + + node = fwnode_find_reference(fwnode, con_id, i); + if (IS_ERR(node)) + break; + + ret = match(node, NULL, data); + fwnode_handle_put(node); + if (ret) { + if (matches) + matches[count] = ret; + count++; + } + } + + return count; +} + /** * fwnode_connection_find_match - Find connection from a device node * @fwnode: Device node with the connection @@ -1250,3 +1315,47 @@ void *fwnode_connection_find_match(struct fwnode_handle *fwnode, return fwnode_devcon_match(fwnode, con_id, data, match); } EXPORT_SYMBOL_GPL(fwnode_connection_find_match); + +/** + * fwnode_connection_find_matches - Find connections from a device node + * @fwnode: Device node with the connection + * @con_id: Identifier for the connection + * @data: Data for the match function + * @match: Function to check and convert the connection description + * @matches: (Optional) array of pointers to fill with matches + * @matches_len: Length of @matches + * + * Find up to @matches_len connections with unique identifier @con_id between + * @fwnode and other device nodes. @match will be used to convert the + * connection description to data the caller is expecting to be returned + * through the @matches array. + * If @matches is NULL @matches_len is ignored and the total number of resolved + * matches is returned. + * + * Return: Number of matches resolved, or negative errno. + */ +int fwnode_connection_find_matches(struct fwnode_handle *fwnode, + const char *con_id, void *data, + devcon_match_fn_t match, + void **matches, unsigned int matches_len) +{ + unsigned int count_graph; + unsigned int count_ref; + + if (!fwnode || !match) + return -EINVAL; + + count_graph = fwnode_graph_devcon_matches(fwnode, con_id, data, match, + matches, matches_len); + + if (matches) { + matches += count_graph; + matches_len -= count_graph; + } + + count_ref = fwnode_devcon_matches(fwnode, con_id, data, match, + matches, matches_len); + + return count_graph + count_ref; +} +EXPORT_SYMBOL_GPL(fwnode_connection_find_matches); diff --git a/include/linux/property.h b/include/linux/property.h index fc24d45632eb..a5b429d623f6 100644 --- a/include/linux/property.h +++ b/include/linux/property.h @@ -451,6 +451,11 @@ static inline void *device_connection_find_match(struct device *dev, return fwnode_connection_find_match(dev_fwnode(dev), con_id, data, match); } +int fwnode_connection_find_matches(struct fwnode_handle *fwnode, + const char *con_id, void *data, + devcon_match_fn_t match, + void **matches, unsigned int matches_len); + /* -------------------------------------------------------------------------- */ /* Software fwnode support - when HW description is incomplete or missing */
In some cases multiple connections with the same connection id needs to be resolved from a fwnode graph. One such example is when separate hardware is used for performing muxing and/or orientation switching of the SuperSpeed and SBU lines in a USB Type-C connector. In this case the connector needs to belong to a graph with multiple matching remote endpoints, and the Type-C controller needs to be able to resolve them both. Add a new API that allows this kind of lookup. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> --- Changes since v4: - Added "Add" to patch subject - Added "(Optional)" kernel-doc of fwnode_connection_find_matches() drivers/base/property.c | 109 +++++++++++++++++++++++++++++++++++++++ include/linux/property.h | 5 ++ 2 files changed, 114 insertions(+)