diff options
Diffstat (limited to 'drivers/of/of_path.c')
-rw-r--r-- | drivers/of/of_path.c | 132 |
1 files changed, 38 insertions, 94 deletions
diff --git a/drivers/of/of_path.c b/drivers/of/of_path.c index 6903905259..ed620f1755 100644 --- a/drivers/of/of_path.c +++ b/drivers/of/of_path.c @@ -23,16 +23,6 @@ #include <linux/mtd/mtd.h> -struct of_path { - struct cdev *cdev; - struct device_d *dev; -}; - -struct of_path_type { - const char *name; - int (*parse)(struct of_path *op, const char *str); -}; - struct device_d *of_find_device_by_node_path(const char *path) { struct device_d *dev; @@ -48,102 +38,44 @@ struct device_d *of_find_device_by_node_path(const char *path) } /** - * of_path_type_partname - find a partition based on physical device and - * partition name - * @op: of_path context - * @name: the partition name to find + * __of_find_path + * + * @node: The node to find the cdev for, can be the device or a + * partition in the device + * @part: Optionally, a description of a parition of @node. See of_find_path + * @outpath: if this function returns 0 outpath will contain the path belonging + * to the input path description. Must be freed with free(). + * @flags: use OF_FIND_PATH_FLAGS_BB to return the .bb device if available + * */ -static int of_path_type_partname(struct of_path *op, const char *name) -{ - if (!op->dev) - return -EINVAL; - - op->cdev = device_find_partition(op->dev, name); - if (op->cdev) { - pr_debug("%s: found part '%s'\n", __func__, name); - return 0; - } else { - pr_debug("%s: cannot find part '%s'\n", __func__, name); - return -ENODEV; - } -} - -static struct of_path_type of_path_types[] = { - { - .name = "partname", - .parse = of_path_type_partname, - }, -}; - -static int of_path_parse_one(struct of_path *op, const char *str) +static int __of_find_path(struct device_node *node, const char *part, char **outpath, unsigned flags) { - int i, ret; - char *name, *desc; - - pr_debug("parsing: %s\n", str); - - name = xstrdup(str); - desc = strchr(name, ':'); - if (!desc) { - free(name); - return -EINVAL; - } - - *desc = 0; - desc++; - - for (i = 0; i < ARRAY_SIZE(of_path_types); i++) { - if (!strcmp(of_path_types[i].name, name)) { - ret = of_path_types[i].parse(op, desc); - goto out; - } - } - - ret = -EINVAL; -out: - free(name); - - return ret; -} - -static int __of_find_path(struct device_node *node, const char *propname, char **outpath, unsigned flags) -{ - struct of_path op = {}; - const char *str; + struct device_d *dev; + struct cdev *cdev; bool add_bb = false; - int i, ret; - op.dev = of_find_device_by_node_path(node->full_name); - if (!op.dev) { - op.dev = of_find_device_by_node_path(node->parent->full_name); - if (!op.dev) + dev = of_find_device_by_node_path(node->full_name); + if (!dev) { + dev = of_find_device_by_node_path(node->parent->full_name); + if (!dev) return -ENODEV; } - device_detect(op.dev); - - op.cdev = cdev_by_device_node(node); + device_detect(dev); - i = 1; + if (part) + cdev = device_find_partition(dev, part); + else + cdev = cdev_by_device_node(node); - while (propname) { - ret = of_property_read_string_index(node, propname, i++, &str); - if (ret) - break; - - ret = of_path_parse_one(&op, str); - if (ret) - return ret; - } - - if (!op.cdev) + if (!cdev) return -ENOENT; - if ((flags & OF_FIND_PATH_FLAGS_BB) && op.cdev->mtd && - mtd_can_have_bb(op.cdev->mtd)) + if ((flags & OF_FIND_PATH_FLAGS_BB) && cdev->mtd && + mtd_can_have_bb(cdev->mtd)) add_bb = true; - *outpath = asprintf("/dev/%s%s", op.cdev->name, add_bb ? ".bb" : ""); + *outpath = asprintf("/dev/%s%s", cdev->name, add_bb ? ".bb" : ""); return 0; } @@ -193,6 +125,8 @@ int of_find_path(struct device_node *node, const char *propname, char **outpath, { struct device_node *rnode; const char *path; + const char *part = NULL; + const char partnamestr[] = "partname:"; path = of_get_property(node, propname, NULL); if (!path) @@ -202,5 +136,15 @@ int of_find_path(struct device_node *node, const char *propname, char **outpath, if (!rnode) return -ENODEV; - return __of_find_path(rnode, propname, outpath, flags); + of_property_read_string_index(node, propname, 1, &part); + if (part) { + if (!strncmp(part, partnamestr, sizeof(partnamestr) - 1)) { + part += sizeof(partnamestr) - 1; + } else { + pr_err("Invalid device-path: %s\n", part); + return -EINVAL; + } + } + + return __of_find_path(rnode, part, outpath, flags); } |