diff options
| -rw-r--r-- | drivers/of/overlay.c | 42 | ||||
| -rw-r--r-- | drivers/of/unittest.c | 3 | ||||
| -rw-r--r-- | include/linux/of.h | 2 |
3 files changed, 34 insertions, 13 deletions
diff --git a/drivers/of/overlay.c b/drivers/of/overlay.c index 7feb643f1370..6f3ae30c878d 100644 --- a/drivers/of/overlay.c +++ b/drivers/of/overlay.c @@ -682,9 +682,11 @@ static int build_changeset(struct overlay_changeset *ovcs) * 1) "target" property containing the phandle of the target * 2) "target-path" property containing the path of the target */ -static struct device_node *find_target(struct device_node *info_node) +static struct device_node *find_target(struct device_node *info_node, + struct device_node *target_base) { struct device_node *node; + char *target_path; const char *path; u32 val; int ret; @@ -700,10 +702,23 @@ static struct device_node *find_target(struct device_node *info_node) ret = of_property_read_string(info_node, "target-path", &path); if (!ret) { - node = of_find_node_by_path(path); - if (!node) - pr_err("find target, node: %pOF, path '%s' not found\n", - info_node, path); + if (target_base) { + target_path = kasprintf(GFP_KERNEL, "%pOF%s", target_base, path); + if (!target_path) + return NULL; + node = of_find_node_by_path(target_path); + if (!node) { + pr_err("find target, node: %pOF, path '%s' not found\n", + info_node, target_path); + } + kfree(target_path); + } else { + node = of_find_node_by_path(path); + if (!node) { + pr_err("find target, node: %pOF, path '%s' not found\n", + info_node, path); + } + } return node; } @@ -715,6 +730,7 @@ static struct device_node *find_target(struct device_node *info_node) /** * init_overlay_changeset() - initialize overlay changeset from overlay tree * @ovcs: Overlay changeset to build + * @target_base: Point to the target node to apply overlay * * Initialize @ovcs. Populate @ovcs->fragments with node information from * the top level of @overlay_root. The relevant top level nodes are the @@ -725,7 +741,8 @@ static struct device_node *find_target(struct device_node *info_node) * detected in @overlay_root. On error return, the caller of * init_overlay_changeset() must call free_overlay_changeset(). */ -static int init_overlay_changeset(struct overlay_changeset *ovcs) +static int init_overlay_changeset(struct overlay_changeset *ovcs, + struct device_node *target_base) { struct device_node *node, *overlay_node; struct fragment *fragment; @@ -786,7 +803,7 @@ static int init_overlay_changeset(struct overlay_changeset *ovcs) fragment = &fragments[cnt]; fragment->overlay = overlay_node; - fragment->target = find_target(node); + fragment->target = find_target(node, target_base); if (!fragment->target) { of_node_put(fragment->overlay); ret = -EINVAL; @@ -877,6 +894,7 @@ static void free_overlay_changeset(struct overlay_changeset *ovcs) * * of_overlay_apply() - Create and apply an overlay changeset * @ovcs: overlay changeset + * @base: point to the target node to apply overlay * * Creates and applies an overlay changeset. * @@ -900,7 +918,8 @@ static void free_overlay_changeset(struct overlay_changeset *ovcs) * the caller of of_overlay_apply() must call free_overlay_changeset(). */ -static int of_overlay_apply(struct overlay_changeset *ovcs) +static int of_overlay_apply(struct overlay_changeset *ovcs, + struct device_node *base) { int ret = 0, ret_revert, ret_tmp; @@ -908,7 +927,7 @@ static int of_overlay_apply(struct overlay_changeset *ovcs) if (ret) goto out; - ret = init_overlay_changeset(ovcs); + ret = init_overlay_changeset(ovcs, base); if (ret) goto out; @@ -952,6 +971,7 @@ out: * @overlay_fdt: pointer to overlay FDT * @overlay_fdt_size: number of bytes in @overlay_fdt * @ret_ovcs_id: pointer for returning created changeset id + * @base: pointer for the target node to apply overlay * * Creates and applies an overlay changeset. * @@ -967,7 +987,7 @@ out: */ int of_overlay_fdt_apply(const void *overlay_fdt, u32 overlay_fdt_size, - int *ret_ovcs_id) + int *ret_ovcs_id, struct device_node *base) { void *new_fdt; void *new_fdt_align; @@ -1037,7 +1057,7 @@ int of_overlay_fdt_apply(const void *overlay_fdt, u32 overlay_fdt_size, } ovcs->overlay_mem = overlay_mem; - ret = of_overlay_apply(ovcs); + ret = of_overlay_apply(ovcs, base); /* * If of_overlay_apply() error, calling free_overlay_changeset() may * result in a memory leak if the apply partly succeeded, so do NOT diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c index 319d2254df9b..b87dca37b5ec 100644 --- a/drivers/of/unittest.c +++ b/drivers/of/unittest.c @@ -3480,7 +3480,8 @@ static int __init overlay_data_apply(const char *overlay_name, int *ovcs_id) if (!size) pr_err("no overlay data for %s\n", overlay_name); - ret = of_overlay_fdt_apply(info->dtbo_begin, size, &info->ovcs_id); + ret = of_overlay_fdt_apply(info->dtbo_begin, size, &info->ovcs_id, + NULL); if (ovcs_id) *ovcs_id = info->ovcs_id; if (ret < 0) diff --git a/include/linux/of.h b/include/linux/of.h index bc2e37f016ec..ed679819c279 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -1667,7 +1667,7 @@ struct of_overlay_notify_data { #ifdef CONFIG_OF_OVERLAY int of_overlay_fdt_apply(const void *overlay_fdt, u32 overlay_fdt_size, - int *ovcs_id); + int *ovcs_id, struct device_node *target_base); int of_overlay_remove(int *ovcs_id); int of_overlay_remove_all(void); |