From 1597d453289b385237628cd96d57d147632ab105 Mon Sep 17 00:00:00 2001 From: Georgi Djakov Date: Tue, 12 May 2020 15:53:20 +0300 Subject: interconnect: Add of_icc_get_by_index() helper function This is the same as the traditional of_icc_get() function, but the difference is that it takes index as an argument, instead of name. Reviewed-by: Matthias Kaehlcke Reviewed-by: Sibi Sankar Link: https://lore.kernel.org/r/20200512125327.1868-4-georgi.djakov@linaro.org Signed-off-by: Georgi Djakov --- drivers/interconnect/core.c | 72 +++++++++++++++++++++++++++++++++------------ 1 file changed, 54 insertions(+), 18 deletions(-) (limited to 'drivers/interconnect') diff --git a/drivers/interconnect/core.c b/drivers/interconnect/core.c index 2c6515e3ecf1..aba5d38ea9d1 100644 --- a/drivers/interconnect/core.c +++ b/drivers/interconnect/core.c @@ -351,9 +351,9 @@ static struct icc_node *of_icc_get_from_provider(struct of_phandle_args *spec) } /** - * of_icc_get() - get a path handle from a DT node based on name + * of_icc_get_by_index() - get a path handle from a DT node based on index * @dev: device pointer for the consumer device - * @name: interconnect path name + * @idx: interconnect path index * * This function will search for a path between two endpoints and return an * icc_path handle on success. Use icc_put() to release constraints when they @@ -365,13 +365,12 @@ static struct icc_node *of_icc_get_from_provider(struct of_phandle_args *spec) * Return: icc_path pointer on success or ERR_PTR() on error. NULL is returned * when the API is disabled or the "interconnects" DT property is missing. */ -struct icc_path *of_icc_get(struct device *dev, const char *name) +struct icc_path *of_icc_get_by_index(struct device *dev, int idx) { - struct icc_path *path = ERR_PTR(-EPROBE_DEFER); + struct icc_path *path; struct icc_node *src_node, *dst_node; - struct device_node *np = NULL; + struct device_node *np; struct of_phandle_args src_args, dst_args; - int idx = 0; int ret; if (!dev || !dev->of_node) @@ -391,12 +390,6 @@ struct icc_path *of_icc_get(struct device *dev, const char *name) * lets support only global ids and extend this in the future if needed * without breaking DT compatibility. */ - if (name) { - idx = of_property_match_string(np, "interconnect-names", name); - if (idx < 0) - return ERR_PTR(idx); - } - ret = of_parse_phandle_with_args(np, "interconnects", "#interconnect-cells", idx * 2, &src_args); @@ -439,12 +432,8 @@ struct icc_path *of_icc_get(struct device *dev, const char *name) return path; } - if (name) - path->name = kstrdup_const(name, GFP_KERNEL); - else - path->name = kasprintf(GFP_KERNEL, "%s-%s", - src_node->name, dst_node->name); - + path->name = kasprintf(GFP_KERNEL, "%s-%s", + src_node->name, dst_node->name); if (!path->name) { kfree(path); return ERR_PTR(-ENOMEM); @@ -452,6 +441,53 @@ struct icc_path *of_icc_get(struct device *dev, const char *name) return path; } +EXPORT_SYMBOL_GPL(of_icc_get_by_index); + +/** + * of_icc_get() - get a path handle from a DT node based on name + * @dev: device pointer for the consumer device + * @name: interconnect path name + * + * This function will search for a path between two endpoints and return an + * icc_path handle on success. Use icc_put() to release constraints when they + * are not needed anymore. + * If the interconnect API is disabled, NULL is returned and the consumer + * drivers will still build. Drivers are free to handle this specifically, + * but they don't have to. + * + * Return: icc_path pointer on success or ERR_PTR() on error. NULL is returned + * when the API is disabled or the "interconnects" DT property is missing. + */ +struct icc_path *of_icc_get(struct device *dev, const char *name) +{ + struct device_node *np; + int idx = 0; + + if (!dev || !dev->of_node) + return ERR_PTR(-ENODEV); + + np = dev->of_node; + + /* + * When the consumer DT node do not have "interconnects" property + * return a NULL path to skip setting constraints. + */ + if (!of_find_property(np, "interconnects", NULL)) + return NULL; + + /* + * We use a combination of phandle and specifier for endpoint. For now + * lets support only global ids and extend this in the future if needed + * without breaking DT compatibility. + */ + if (name) { + idx = of_property_match_string(np, "interconnect-names", name); + if (idx < 0) + return ERR_PTR(idx); + } + + return of_icc_get_by_index(dev, idx); +} EXPORT_SYMBOL_GPL(of_icc_get); /** -- cgit v1.2.3