3 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
5 * SPDX-License-Identifier: GPL-2.0+
8 #ifndef __FDT_SUPPORT_H
9 #define __FDT_SUPPORT_H
11 #ifdef CONFIG_OF_LIBFDT
15 u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell,
16 const char *prop, const u32 dflt);
17 u32 fdt_getprop_u32_default(const void *fdt, const char *path,
18 const char *prop, const u32 dflt);
21 * Add data to the root of the FDT before booting the OS.
23 * See doc/device-tree-bindings/root.txt
25 * @param fdt FDT address in memory
26 * @return 0 if ok, or -FDT_ERR_... on error
28 int fdt_root(void *fdt);
31 * Add chosen data the FDT before booting the OS.
33 * In particular, this adds the kernel command line (bootargs) to the FDT.
35 * @param fdt FDT address in memory
36 * @return 0 if ok, or -FDT_ERR_... on error
38 int fdt_chosen(void *fdt);
41 * Add initrd information to the FDT before booting the OS.
43 * @param fdt FDT address in memory
44 * @return 0 if ok, or -FDT_ERR_... on error
46 int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end);
48 void do_fixup_by_path(void *fdt, const char *path, const char *prop,
49 const void *val, int len, int create);
50 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
53 static inline void do_fixup_by_path_string(void *fdt, const char *path,
54 const char *prop, const char *status)
56 do_fixup_by_path(fdt, path, prop, status, strlen(status) + 1, 1);
59 void do_fixup_by_prop(void *fdt,
60 const char *pname, const void *pval, int plen,
61 const char *prop, const void *val, int len,
63 void do_fixup_by_prop_u32(void *fdt,
64 const char *pname, const void *pval, int plen,
65 const char *prop, u32 val, int create);
66 void do_fixup_by_compat(void *fdt, const char *compat,
67 const char *prop, const void *val, int len, int create);
68 void do_fixup_by_compat_u32(void *fdt, const char *compat,
69 const char *prop, u32 val, int create);
71 * Setup the memory node in the DT. Creates one if none was existing before.
72 * Calls fdt_fixup_memory_banks() to populate a single reg pair covering the
75 * @param blob FDT blob to update
76 * @param start Begin of DRAM mapping in physical memory
77 * @param size Size of the single memory bank
78 * @return 0 if ok, or -1 or -FDT_ERR_... on error
80 int fdt_fixup_memory(void *blob, u64 start, u64 size);
83 * Fill the DT memory node with multiple memory banks.
84 * Creates the node if none was existing before.
85 * If banks is 0, it will not touch the existing reg property. This allows
86 * boards to not mess with the existing DT setup, which may have been
87 * filled in properly before.
89 * @param blob FDT blob to update
90 * @param start Array of size <banks> to hold the start addresses.
91 * @param size Array of size <banks> to hold the size of each region.
92 * @param banks Number of memory banks to create. If 0, the reg
93 * property will be left untouched.
94 * @return 0 if ok, or -1 or -FDT_ERR_... on error
96 #ifdef CONFIG_ARCH_FIXUP_FDT_MEMORY
97 int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks);
99 static inline int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[],
106 void fdt_fixup_ethernet(void *fdt);
107 int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
108 const void *val, int len, int create);
109 void fdt_fixup_qe_firmware(void *fdt);
112 * Update native-mode property of display-timings node to the phandle
113 * of the timings matching a display by name (case insensitive).
115 * see kernel Documentation/devicetree/bindings/video/display-timing.txt
117 * @param blob FDT blob to update
118 * @param path path within dt
119 * @param display name of display timing to match
120 * @return 0 if ok, or -FDT_ERR_... on error
122 int fdt_fixup_display(void *blob, const char *path, const char *display);
124 #if defined(CONFIG_USB_EHCI_FSL) || defined(CONFIG_USB_XHCI_FSL)
125 void fsl_fdt_fixup_dr_usb(void *blob, bd_t *bd);
127 static inline void fsl_fdt_fixup_dr_usb(void *blob, bd_t *bd) {}
128 #endif /* defined(CONFIG_USB_EHCI_FSL) || defined(CONFIG_USB_XHCI_FSL) */
130 #if defined(CONFIG_SYS_FSL_SEC_COMPAT)
131 void fdt_fixup_crypto_node(void *blob, int sec_rev);
133 static inline void fdt_fixup_crypto_node(void *blob, int sec_rev) {}
136 #if CONFIG_IS_ENABLED(LOAD_FIT)
138 * Record information about a processed loadable in /fit-images (creating
139 * /fit-images if necessary).
141 * @param blob FDT blob to update
142 * @param index index of this loadable
143 * @param name name of the loadable
144 * @param load_addr address the loadable was loaded to
145 * @param size number of bytes loaded
146 * @param entry_point entry point (if specified, otherwise pass -1)
147 * @param type type (if specified, otherwise pass NULL)
148 * @param os os-type (if specified, otherwise pass NULL)
149 * @return 0 if ok, or -1 or -FDT_ERR_... on error
151 int fdt_record_loadable(void *blob, u32 index, const char *name,
152 uintptr_t load_addr, u32 size, uintptr_t entry_point,
153 const char *type, const char *os);
158 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose);
161 int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name);
164 * Add board-specific data to the FDT before booting the OS.
166 * Use CONFIG_SYS_FDT_PAD to ensure there is sufficient space.
167 * This function is called if CONFIG_OF_BOARD_SETUP is defined
169 * @param blob FDT blob to update
170 * @param bd_t Pointer to board data
171 * @return 0 if ok, or -FDT_ERR_... on error
173 int ft_board_setup(void *blob, bd_t *bd);
176 * The keystone2 SOC requires all 32 bit aliased addresses to be converted
177 * to their 36 physical format. This has to happen after all fdt nodes
178 * are added or modified by the image_setup_libfdt(). The ft_board_setup_ex()
179 * called at the end of the image_setup_libfdt() is to do that convertion.
181 void ft_board_setup_ex(void *blob, bd_t *bd);
182 void ft_cpu_setup(void *blob, bd_t *bd);
183 void ft_pci_setup(void *blob, bd_t *bd);
186 * Add system-specific data to the FDT before booting the OS.
188 * Use CONFIG_SYS_FDT_PAD to ensure there is sufficient space.
189 * This function is called if CONFIG_OF_SYSTEM_SETUP is defined
191 * @param blob FDT blob to update
192 * @param bd_t Pointer to board data
193 * @return 0 if ok, or -FDT_ERR_... on error
195 int ft_system_setup(void *blob, bd_t *bd);
197 void set_working_fdt_addr(ulong addr);
200 * shrink down the given blob to minimum size + some extrasize if required
202 * @param blob FDT blob to update
203 * @param extrasize additional bytes needed
204 * @return 0 if ok, or -FDT_ERR_... on error
206 int fdt_shrink_to_minimum(void *blob, uint extrasize);
207 int fdt_increase_size(void *fdt, int add_len);
209 int fdt_fixup_nor_flash_size(void *blob);
211 #if defined(CONFIG_FDT_FIXUP_PARTITIONS)
212 void fdt_fixup_mtdparts(void *fdt, void *node_info, int node_info_size);
214 static inline void fdt_fixup_mtdparts(void *fdt, void *node_info,
215 int node_info_size) {}
218 void fdt_del_node_and_alias(void *blob, const char *alias);
219 u64 fdt_translate_address(const void *blob, int node_offset,
220 const __be32 *in_addr);
221 int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
222 phys_addr_t compat_off);
223 int fdt_alloc_phandle(void *blob);
224 int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle);
225 unsigned int fdt_create_phandle(void *fdt, int nodeoffset);
226 int fdt_add_edid(void *blob, const char *compat, unsigned char *buf);
228 int fdt_verify_alias_address(void *fdt, int anode, const char *alias,
230 u64 fdt_get_base_address(const void *fdt, int node);
231 int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
232 uint64_t *addr, uint64_t *len);
238 FDT_STATUS_FAIL_ERROR_CODE,
240 int fdt_set_node_status(void *fdt, int nodeoffset,
241 enum fdt_status status, unsigned int error_code);
242 static inline int fdt_status_okay(void *fdt, int nodeoffset)
244 return fdt_set_node_status(fdt, nodeoffset, FDT_STATUS_OKAY, 0);
246 static inline int fdt_status_disabled(void *fdt, int nodeoffset)
248 return fdt_set_node_status(fdt, nodeoffset, FDT_STATUS_DISABLED, 0);
250 static inline int fdt_status_fail(void *fdt, int nodeoffset)
252 return fdt_set_node_status(fdt, nodeoffset, FDT_STATUS_FAIL, 0);
255 int fdt_set_status_by_alias(void *fdt, const char *alias,
256 enum fdt_status status, unsigned int error_code);
257 static inline int fdt_status_okay_by_alias(void *fdt, const char *alias)
259 return fdt_set_status_by_alias(fdt, alias, FDT_STATUS_OKAY, 0);
261 static inline int fdt_status_disabled_by_alias(void *fdt, const char *alias)
263 return fdt_set_status_by_alias(fdt, alias, FDT_STATUS_DISABLED, 0);
265 static inline int fdt_status_fail_by_alias(void *fdt, const char *alias)
267 return fdt_set_status_by_alias(fdt, alias, FDT_STATUS_FAIL, 0);
270 /* Helper to read a big number; size is in cells (not bytes) */
271 static inline u64 fdt_read_number(const fdt32_t *cell, int size)
275 r = (r << 32) | fdt32_to_cpu(*(cell++));
279 void fdt_support_default_count_cells(const void *blob, int parentoffset,
280 int *addrc, int *sizec);
281 int ft_verify_fdt(void *fdt);
282 int arch_fixup_memory_node(void *blob);
284 int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width,
285 u32 height, u32 stride, const char *format);
287 int fdt_overlay_apply_verbose(void *fdt, void *fdto);
289 #endif /* ifdef CONFIG_OF_LIBFDT */
292 int fdtdec_get_int(const void *blob, int node, const char *prop_name,
295 #endif /* ifndef __FDT_SUPPORT_H */