We already have support for unflattening the devicetree. This patch adds support for converting it back to a dtb.
Signed-off-by: Sascha Hauer <[email protected]> --- drivers/of/base.c | 61 +++++++++++++++++++++++++++++++++++++++++++++++++++++ include/of.h | 1 + 2 files changed, 62 insertions(+) diff --git a/drivers/of/base.c b/drivers/of/base.c index 3c00fa5..b584cf2 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -24,6 +24,7 @@ #include <malloc.h> #include <init.h> #include <memory.h> +#include <sizes.h> #include <linux/ctype.h> /** @@ -892,6 +893,66 @@ int of_unflatten_dtb(struct fdt_header *fdt) return 0; } +static int __of_flatten_dtb(void *fdt, struct device_node *node) +{ + struct property *p; + struct device_node *n; + int ret; + + ret = fdt_begin_node(fdt, node->name); + if (ret) + return ret; + + list_for_each_entry(p, &node->properties, list) { + ret = fdt_property(fdt, p->name, p->value, p->length); + if (ret) + return ret; + } + + list_for_each_entry(n, &node->children, parent_list) { + ret = __of_flatten_dtb(fdt, n); + if (ret) + return ret; + } + + ret = fdt_end_node(fdt); + + return ret; +} + +#define DTB_SIZE SZ_128K + +void *of_flatten_dtb(void) +{ + void *fdt; + int ret; + + fdt = malloc(DTB_SIZE); + if (!fdt) + return NULL; + + ret = fdt_create(fdt, DTB_SIZE); + if (ret) + goto out_free; + + ret = fdt_finish_reservemap(fdt); + if (ret) + goto out_free; + + ret = __of_flatten_dtb(fdt, root_node); + if (ret) + goto out_free; + + fdt_finish(fdt); + + return fdt; + +out_free: + free(fdt); + + return NULL; +} + int of_device_is_stdout_path(struct device_d *dev) { struct device_node *dn; diff --git a/include/of.h b/include/of.h index 6b562bd..303e036 100644 --- a/include/of.h +++ b/include/of.h @@ -107,6 +107,7 @@ int of_machine_is_compatible(const char *compat); void of_print_nodes(struct device_node *node, int indent); int of_probe(void); int of_unflatten_dtb(struct fdt_header *fdt); +void *of_flatten_dtb(void); int of_property_read_string(struct device_node *np, const char *propname, const char **out_string); -- 1.7.10.4 _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
