1 /* SPDX-License-Identifier: GPL-2.0+ */
4 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
7 #ifndef __FDT_SUPPORT_H
8 #define __FDT_SUPPORT_H
10 #ifdef CONFIG_OF_LIBFDT
12 #include <linux/libfdt.h>
14 u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell,
15 const char *prop, const u32 dflt);
16 u32 fdt_getprop_u32_default(const void *fdt, const char *path,
17 const char *prop, const u32 dflt);
20 * Add data to the root of the FDT before booting the OS.
22 * See doc/device-tree-bindings/root.txt
24 * @param fdt FDT address in memory
25 * @return 0 if ok, or -FDT_ERR_... on error
27 int fdt_root(void *fdt);
30 * Add chosen data the FDT before booting the OS.
32 * In particular, this adds the kernel command line (bootargs) to the FDT.
34 * @param fdt FDT address in memory
35 * @return 0 if ok, or -FDT_ERR_... on error
37 int fdt_chosen(void *fdt);
40 * Add initrd information to the FDT before booting the OS.
42 * @param fdt FDT address in memory
43 * @return 0 if ok, or -FDT_ERR_... on error
45 int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end);
47 void do_fixup_by_path(void *fdt, const char *path, const char *prop,
48 const void *val, int len, int create);
49 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
52 static inline void do_fixup_by_path_string(void *fdt, const char *path,
53 const char *prop, const char *status)
55 do_fixup_by_path(fdt, path, prop, status, strlen(status) + 1, 1);
58 void do_fixup_by_prop(void *fdt,
59 const char *pname, const void *pval, int plen,
60 const char *prop, const void *val, int len,
62 void do_fixup_by_prop_u32(void *fdt,
63 const char *pname, const void *pval, int plen,
64 const char *prop, u32 val, int create);
65 void do_fixup_by_compat(void *fdt, const char *compat,
66 const char *prop, const void *val, int len, int create);
67 void do_fixup_by_compat_u32(void *fdt, const char *compat,
68 const char *prop, u32 val, int create);
70 * Setup the memory node in the DT. Creates one if none was existing before.
71 * Calls fdt_fixup_memory_banks() to populate a single reg pair covering the
74 * @param blob FDT blob to update
75 * @param start Begin of DRAM mapping in physical memory
76 * @param size Size of the single memory bank
77 * @return 0 if ok, or -1 or -FDT_ERR_... on error
79 int fdt_fixup_memory(void *blob, u64 start, u64 size);
82 * Fill the DT memory node with multiple memory banks.
83 * Creates the node if none was existing before.
84 * If banks is 0, it will not touch the existing reg property. This allows
85 * boards to not mess with the existing DT setup, which may have been
86 * filled in properly before.
88 * @param blob FDT blob to update
89 * @param start Array of size <banks> to hold the start addresses.
90 * @param size Array of size <banks> to hold the size of each region.
91 * @param banks Number of memory banks to create. If 0, the reg
92 * property will be left untouched.
93 * @return 0 if ok, or -1 or -FDT_ERR_... on error
95 #ifdef CONFIG_ARCH_FIXUP_FDT_MEMORY
96 int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks);
98 static inline int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[],
105 void fdt_fixup_ethernet(void *fdt);
106 int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
107 const void *val, int len, int create);
108 void fdt_fixup_qe_firmware(void *fdt);
111 * Update native-mode property of display-timings node to the phandle
112 * of the timings matching a display by name (case insensitive).
114 * see kernel Documentation/devicetree/bindings/video/display-timing.txt
116 * @param blob FDT blob to update
117 * @param path path within dt
118 * @param display name of display timing to match
119 * @return 0 if ok, or -FDT_ERR_... on error
121 int fdt_fixup_display(void *blob, const char *path, const char *display);
123 #if defined(CONFIG_USB_EHCI_FSL) || defined(CONFIG_USB_XHCI_FSL)
124 void fsl_fdt_fixup_dr_usb(void *blob, bd_t *bd);
126 static inline void fsl_fdt_fixup_dr_usb(void *blob, bd_t *bd) {}
127 #endif /* defined(CONFIG_USB_EHCI_FSL) || defined(CONFIG_USB_XHCI_FSL) */
129 #if defined(CONFIG_SYS_FSL_SEC_COMPAT)
130 void fdt_fixup_crypto_node(void *blob, int sec_rev);
132 static inline void fdt_fixup_crypto_node(void *blob, int sec_rev) {}
136 * Record information about a processed loadable in /fit-images (creating
137 * /fit-images if necessary).
139 * @param blob FDT blob to update
140 * @param index index of this loadable
141 * @param name name of the loadable
142 * @param load_addr address the loadable was loaded to
143 * @param size number of bytes loaded
144 * @param entry_point entry point (if specified, otherwise pass -1)
145 * @param type type (if specified, otherwise pass NULL)
146 * @param os os-type (if specified, otherwise pass NULL)
147 * @return 0 if ok, or -1 or -FDT_ERR_... on error
149 int fdt_record_loadable(void *blob, u32 index, const char *name,
150 uintptr_t load_addr, u32 size, uintptr_t entry_point,
151 const char *type, const char *os);
155 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose);
158 int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name);
161 * Add board-specific data to the FDT before booting the OS.
163 * Use CONFIG_SYS_FDT_PAD to ensure there is sufficient space.
164 * This function is called if CONFIG_OF_BOARD_SETUP is defined
166 * @param blob FDT blob to update
167 * @param bd_t Pointer to board data
168 * @return 0 if ok, or -FDT_ERR_... on error
170 int ft_board_setup(void *blob, bd_t *bd);
173 * The keystone2 SOC requires all 32 bit aliased addresses to be converted
174 * to their 36 physical format. This has to happen after all fdt nodes
175 * are added or modified by the image_setup_libfdt(). The ft_board_setup_ex()
176 * called at the end of the image_setup_libfdt() is to do that convertion.
178 void ft_board_setup_ex(void *blob, bd_t *bd);
179 void ft_cpu_setup(void *blob, bd_t *bd);
180 void ft_pci_setup(void *blob, bd_t *bd);
183 * Add system-specific data to the FDT before booting the OS.
185 * Use CONFIG_SYS_FDT_PAD to ensure there is sufficient space.
186 * This function is called if CONFIG_OF_SYSTEM_SETUP is defined
188 * @param blob FDT blob to update
189 * @param bd_t Pointer to board data
190 * @return 0 if ok, or -FDT_ERR_... on error
192 int ft_system_setup(void *blob, bd_t *bd);
194 void set_working_fdt_addr(ulong addr);
197 * shrink down the given blob to minimum size + some extrasize if required
199 * @param blob FDT blob to update
200 * @param extrasize additional bytes needed
201 * @return 0 if ok, or -FDT_ERR_... on error
203 int fdt_shrink_to_minimum(void *blob, uint extrasize);
204 int fdt_increase_size(void *fdt, int add_len);
206 int fdt_fixup_nor_flash_size(void *blob);
209 #if defined(CONFIG_FDT_FIXUP_PARTITIONS)
210 void fdt_fixup_mtdparts(void *fdt, const struct node_info *node_info,
213 static inline void fdt_fixup_mtdparts(void *fdt,
214 const struct node_info *node_info,
220 void fdt_del_node_and_alias(void *blob, const char *alias);
223 * Translate an address from the DT into a CPU physical address
225 * The translation relies on the "ranges" property.
227 * @param blob Pointer to device tree blob
228 * @param node_offset Node DT offset
229 * @param in_addr Pointer to the address to translate
230 * @return translated address or OF_BAD_ADDR on error
232 u64 fdt_translate_address(const void *blob, int node_offset,
233 const __be32 *in_addr);
235 * Translate a DMA address from the DT into a CPU physical address
237 * The translation relies on the "dma-ranges" property.
239 * @param blob Pointer to device tree blob
240 * @param node_offset Node DT offset
241 * @param in_addr Pointer to the DMA address to translate
242 * @return translated DMA address or OF_BAD_ADDR on error
244 u64 fdt_translate_dma_address(const void *blob, int node_offset,
245 const __be32 *in_addr);
247 int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
248 phys_addr_t compat_off);
249 int fdt_alloc_phandle(void *blob);
250 int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle);
251 unsigned int fdt_create_phandle(void *fdt, int nodeoffset);
252 int fdt_add_edid(void *blob, const char *compat, unsigned char *buf);
254 int fdt_verify_alias_address(void *fdt, int anode, const char *alias,
256 u64 fdt_get_base_address(const void *fdt, int node);
257 int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
258 uint64_t *addr, uint64_t *len);
264 FDT_STATUS_FAIL_ERROR_CODE,
266 int fdt_set_node_status(void *fdt, int nodeoffset,
267 enum fdt_status status, unsigned int error_code);
268 static inline int fdt_status_okay(void *fdt, int nodeoffset)
270 return fdt_set_node_status(fdt, nodeoffset, FDT_STATUS_OKAY, 0);
272 static inline int fdt_status_disabled(void *fdt, int nodeoffset)
274 return fdt_set_node_status(fdt, nodeoffset, FDT_STATUS_DISABLED, 0);
276 static inline int fdt_status_fail(void *fdt, int nodeoffset)
278 return fdt_set_node_status(fdt, nodeoffset, FDT_STATUS_FAIL, 0);
281 int fdt_set_status_by_alias(void *fdt, const char *alias,
282 enum fdt_status status, unsigned int error_code);
283 static inline int fdt_status_okay_by_alias(void *fdt, const char *alias)
285 return fdt_set_status_by_alias(fdt, alias, FDT_STATUS_OKAY, 0);
287 static inline int fdt_status_disabled_by_alias(void *fdt, const char *alias)
289 return fdt_set_status_by_alias(fdt, alias, FDT_STATUS_DISABLED, 0);
291 static inline int fdt_status_fail_by_alias(void *fdt, const char *alias)
293 return fdt_set_status_by_alias(fdt, alias, FDT_STATUS_FAIL, 0);
296 /* Helper to read a big number; size is in cells (not bytes) */
297 static inline u64 fdt_read_number(const fdt32_t *cell, int size)
301 r = (r << 32) | fdt32_to_cpu(*(cell++));
305 void fdt_support_default_count_cells(const void *blob, int parentoffset,
306 int *addrc, int *sizec);
307 int ft_verify_fdt(void *fdt);
308 int arch_fixup_memory_node(void *blob);
310 int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width,
311 u32 height, u32 stride, const char *format);
313 int fdt_overlay_apply_verbose(void *fdt, void *fdto);
316 * fdt_get_cells_len() - Get the length of a type of cell in top-level nodes
318 * Returns the length of the cell type in bytes (4 or 8).
320 * @blob: Pointer to device tree blob
321 * @nr_cells_name: Name to lookup, e.g. "#address-cells"
323 int fdt_get_cells_len(const void *blob, char *nr_cells_name);
325 #endif /* ifdef CONFIG_OF_LIBFDT */
328 int fdtdec_get_int(const void *blob, int node, const char *prop_name,
331 #ifdef CONFIG_FMAN_ENET
332 int fdt_update_ethernet_dt(void *blob);
334 #ifdef CONFIG_FSL_MC_ENET
335 void fdt_fixup_board_enet(void *blob);
337 #endif /* ifndef __FDT_SUPPORT_H */