diff options
Diffstat (limited to 'kernel/scripts/dtc/libfdt/libfdt.h')
| -rw-r--r-- | kernel/scripts/dtc/libfdt/libfdt.h | 148 |
1 files changed, 128 insertions, 20 deletions
diff --git a/kernel/scripts/dtc/libfdt/libfdt.h b/kernel/scripts/dtc/libfdt/libfdt.h index 73f49759a..ea35ac3c9 100644 --- a/kernel/scripts/dtc/libfdt/libfdt.h +++ b/kernel/scripts/dtc/libfdt/libfdt.h @@ -51,8 +51,8 @@ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ -#include <libfdt_env.h> -#include <fdt.h> +#include "libfdt_env.h" +#include "fdt.h" #define FDT_FIRST_SUPPORTED_VERSION 0x10 #define FDT_LAST_SUPPORTED_VERSION 0x11 @@ -116,7 +116,12 @@ * Should never be returned, if it is, it indicates a bug in * libfdt itself. */ -#define FDT_ERR_MAX 13 +/* Errors in device tree content */ +#define FDT_ERR_BADNCELLS 14 + /* FDT_ERR_BADNCELLS: Device tree has a #address-cells, #size-cells + * or similar property with a bad format or value */ + +#define FDT_ERR_MAX 14 /**********************************************************************/ /* Low-level functions (you probably don't need these) */ @@ -136,6 +141,28 @@ uint32_t fdt_next_tag(const void *fdt, int offset, int *nextoffset); int fdt_next_node(const void *fdt, int offset, int *depth); +/** + * fdt_first_subnode() - get offset of first direct subnode + * + * @fdt: FDT blob + * @offset: Offset of node to check + * @return offset of first subnode, or -FDT_ERR_NOTFOUND if there is none + */ +int fdt_first_subnode(const void *fdt, int offset); + +/** + * fdt_next_subnode() - get offset of next direct subnode + * + * After first calling fdt_first_subnode(), call this function repeatedly to + * get direct subnodes of a parent node. + * + * @fdt: FDT blob + * @offset: Offset of previous subnode + * @return offset of next subnode, or -FDT_ERR_NOTFOUND if there are no more + * subnodes + */ +int fdt_next_subnode(const void *fdt, int offset); + /**********************************************************************/ /* General functions */ /**********************************************************************/ @@ -296,6 +323,17 @@ int fdt_subnode_offset_namelen(const void *fdt, int parentoffset, int fdt_subnode_offset(const void *fdt, int parentoffset, const char *name); /** + * fdt_path_offset_namelen - find a tree node by its full path + * @fdt: pointer to the device tree blob + * @path: full path of the node to locate + * @namelen: number of characters of path to consider + * + * Identical to fdt_path_offset(), but only consider the first namelen + * characters of path as the path name. + */ +int fdt_path_offset_namelen(const void *fdt, const char *path, int namelen); + +/** * fdt_path_offset - find a tree node by its full path * @fdt: pointer to the device tree blob * @path: full path of the node to locate @@ -582,7 +620,7 @@ const char *fdt_get_alias_namelen(const void *fdt, * value of the property named 'name' in the node /aliases. * * returns: - * a pointer to the expansion of the alias named 'name', of it exists + * a pointer to the expansion of the alias named 'name', if it exists * NULL, if the given alias or the /aliases node does not exist */ const char *fdt_get_alias(const void *fdt, const char *name); @@ -816,6 +854,75 @@ int fdt_node_check_compatible(const void *fdt, int nodeoffset, int fdt_node_offset_by_compatible(const void *fdt, int startoffset, const char *compatible); +/** + * fdt_stringlist_contains - check a string list property for a string + * @strlist: Property containing a list of strings to check + * @listlen: Length of property + * @str: String to search for + * + * This is a utility function provided for convenience. The list contains + * one or more strings, each terminated by \0, as is found in a device tree + * "compatible" property. + * + * @return: 1 if the string is found in the list, 0 not found, or invalid list + */ +int fdt_stringlist_contains(const char *strlist, int listlen, const char *str); + +/**********************************************************************/ +/* Read-only functions (addressing related) */ +/**********************************************************************/ + +/** + * FDT_MAX_NCELLS - maximum value for #address-cells and #size-cells + * + * This is the maximum value for #address-cells, #size-cells and + * similar properties that will be processed by libfdt. IEE1275 + * requires that OF implementations handle values up to 4. + * Implementations may support larger values, but in practice higher + * values aren't used. + */ +#define FDT_MAX_NCELLS 4 + +/** + * fdt_address_cells - retrieve address size for a bus represented in the tree + * @fdt: pointer to the device tree blob + * @nodeoffset: offset of the node to find the address size for + * + * When the node has a valid #address-cells property, returns its value. + * + * returns: + * 0 <= n < FDT_MAX_NCELLS, on success + * 2, if the node has no #address-cells property + * -FDT_ERR_BADNCELLS, if the node has a badly formatted or invalid #address-cells property + * -FDT_ERR_BADMAGIC, + * -FDT_ERR_BADVERSION, + * -FDT_ERR_BADSTATE, + * -FDT_ERR_BADSTRUCTURE, + * -FDT_ERR_TRUNCATED, standard meanings + */ +int fdt_address_cells(const void *fdt, int nodeoffset); + +/** + * fdt_size_cells - retrieve address range size for a bus represented in the + * tree + * @fdt: pointer to the device tree blob + * @nodeoffset: offset of the node to find the address range size for + * + * When the node has a valid #size-cells property, returns its value. + * + * returns: + * 0 <= n < FDT_MAX_NCELLS, on success + * 2, if the node has no #address-cells property + * -FDT_ERR_BADNCELLS, if the node has a badly formatted or invalid #size-cells property + * -FDT_ERR_BADMAGIC, + * -FDT_ERR_BADVERSION, + * -FDT_ERR_BADSTATE, + * -FDT_ERR_BADSTRUCTURE, + * -FDT_ERR_TRUNCATED, standard meanings + */ +int fdt_size_cells(const void *fdt, int nodeoffset); + + /**********************************************************************/ /* Write-in-place functions */ /**********************************************************************/ @@ -882,8 +989,8 @@ int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name, static inline int fdt_setprop_inplace_u32(void *fdt, int nodeoffset, const char *name, uint32_t val) { - val = cpu_to_fdt32(val); - return fdt_setprop_inplace(fdt, nodeoffset, name, &val, sizeof(val)); + fdt32_t tmp = cpu_to_fdt32(val); + return fdt_setprop_inplace(fdt, nodeoffset, name, &tmp, sizeof(tmp)); } /** @@ -917,8 +1024,8 @@ static inline int fdt_setprop_inplace_u32(void *fdt, int nodeoffset, static inline int fdt_setprop_inplace_u64(void *fdt, int nodeoffset, const char *name, uint64_t val) { - val = cpu_to_fdt64(val); - return fdt_setprop_inplace(fdt, nodeoffset, name, &val, sizeof(val)); + fdt64_t tmp = cpu_to_fdt64(val); + return fdt_setprop_inplace(fdt, nodeoffset, name, &tmp, sizeof(tmp)); } /** @@ -987,19 +1094,20 @@ int fdt_nop_node(void *fdt, int nodeoffset); /**********************************************************************/ int fdt_create(void *buf, int bufsize); +int fdt_resize(void *fdt, void *buf, int bufsize); int fdt_add_reservemap_entry(void *fdt, uint64_t addr, uint64_t size); int fdt_finish_reservemap(void *fdt); int fdt_begin_node(void *fdt, const char *name); int fdt_property(void *fdt, const char *name, const void *val, int len); static inline int fdt_property_u32(void *fdt, const char *name, uint32_t val) { - val = cpu_to_fdt32(val); - return fdt_property(fdt, name, &val, sizeof(val)); + fdt32_t tmp = cpu_to_fdt32(val); + return fdt_property(fdt, name, &tmp, sizeof(tmp)); } static inline int fdt_property_u64(void *fdt, const char *name, uint64_t val) { - val = cpu_to_fdt64(val); - return fdt_property(fdt, name, &val, sizeof(val)); + fdt64_t tmp = cpu_to_fdt64(val); + return fdt_property(fdt, name, &tmp, sizeof(tmp)); } static inline int fdt_property_cell(void *fdt, const char *name, uint32_t val) { @@ -1154,8 +1262,8 @@ int fdt_setprop(void *fdt, int nodeoffset, const char *name, static inline int fdt_setprop_u32(void *fdt, int nodeoffset, const char *name, uint32_t val) { - val = cpu_to_fdt32(val); - return fdt_setprop(fdt, nodeoffset, name, &val, sizeof(val)); + fdt32_t tmp = cpu_to_fdt32(val); + return fdt_setprop(fdt, nodeoffset, name, &tmp, sizeof(tmp)); } /** @@ -1189,8 +1297,8 @@ static inline int fdt_setprop_u32(void *fdt, int nodeoffset, const char *name, static inline int fdt_setprop_u64(void *fdt, int nodeoffset, const char *name, uint64_t val) { - val = cpu_to_fdt64(val); - return fdt_setprop(fdt, nodeoffset, name, &val, sizeof(val)); + fdt64_t tmp = cpu_to_fdt64(val); + return fdt_setprop(fdt, nodeoffset, name, &tmp, sizeof(tmp)); } /** @@ -1296,8 +1404,8 @@ int fdt_appendprop(void *fdt, int nodeoffset, const char *name, static inline int fdt_appendprop_u32(void *fdt, int nodeoffset, const char *name, uint32_t val) { - val = cpu_to_fdt32(val); - return fdt_appendprop(fdt, nodeoffset, name, &val, sizeof(val)); + fdt32_t tmp = cpu_to_fdt32(val); + return fdt_appendprop(fdt, nodeoffset, name, &tmp, sizeof(tmp)); } /** @@ -1331,8 +1439,8 @@ static inline int fdt_appendprop_u32(void *fdt, int nodeoffset, static inline int fdt_appendprop_u64(void *fdt, int nodeoffset, const char *name, uint64_t val) { - val = cpu_to_fdt64(val); - return fdt_appendprop(fdt, nodeoffset, name, &val, sizeof(val)); + fdt64_t tmp = cpu_to_fdt64(val); + return fdt_appendprop(fdt, nodeoffset, name, &tmp, sizeof(tmp)); } /** |