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 int fdt_fixup_memory_banks(void *blob
, u64 start
[], u64 size
[], int banks
);
98 void fdt_fixup_ethernet(void *fdt
);
99 int fdt_find_and_setprop(void *fdt
, const char *node
, const char *prop
,
100 const void *val
, int len
, int create
);
101 void fdt_fixup_qe_firmware(void *fdt
);
104 * Update native-mode property of display-timings node to the phandle
105 * of the timings matching a display by name (case insensitive).
107 * see kernel Documentation/devicetree/bindings/video/display-timing.txt
109 * @param blob FDT blob to update
110 * @param path path within dt
111 * @param display name of display timing to match
112 * @return 0 if ok, or -FDT_ERR_... on error
114 int fdt_fixup_display(void *blob
, const char *path
, const char *display
);
116 #if defined(CONFIG_HAS_FSL_DR_USB) || defined(CONFIG_HAS_FSL_MPH_USB)
117 void fdt_fixup_dr_usb(void *blob
, bd_t
*bd
);
119 static inline void fdt_fixup_dr_usb(void *blob
, bd_t
*bd
) {}
120 #endif /* defined(CONFIG_HAS_FSL_DR_USB) || defined(CONFIG_HAS_FSL_MPH_USB) */
122 #if defined(CONFIG_SYS_FSL_SEC_COMPAT)
123 void fdt_fixup_crypto_node(void *blob
, int sec_rev
);
125 static inline void fdt_fixup_crypto_node(void *blob
, int sec_rev
) {}
130 int fdt_pci_dma_ranges(void *blob
, int phb_off
, struct pci_controller
*hose
);
133 int fdt_find_or_add_subnode(void *fdt
, int parentoffset
, const char *name
);
136 * Add board-specific data to the FDT before booting the OS.
138 * Use CONFIG_SYS_FDT_PAD to ensure there is sufficient space.
139 * This function is called if CONFIG_OF_BOARD_SETUP is defined
141 * @param blob FDT blob to update
142 * @param bd_t Pointer to board data
143 * @return 0 if ok, or -FDT_ERR_... on error
145 int ft_board_setup(void *blob
, bd_t
*bd
);
148 * The keystone2 SOC requires all 32 bit aliased addresses to be converted
149 * to their 36 physical format. This has to happen after all fdt nodes
150 * are added or modified by the image_setup_libfdt(). The ft_board_setup_ex()
151 * called at the end of the image_setup_libfdt() is to do that convertion.
153 void ft_board_setup_ex(void *blob
, bd_t
*bd
);
154 void ft_cpu_setup(void *blob
, bd_t
*bd
);
155 void ft_pci_setup(void *blob
, bd_t
*bd
);
158 * Add system-specific data to the FDT before booting the OS.
160 * Use CONFIG_SYS_FDT_PAD to ensure there is sufficient space.
161 * This function is called if CONFIG_OF_SYSTEM_SETUP is defined
163 * @param blob FDT blob to update
164 * @param bd_t Pointer to board data
165 * @return 0 if ok, or -FDT_ERR_... on error
167 int ft_system_setup(void *blob
, bd_t
*bd
);
169 void set_working_fdt_addr(ulong addr
);
170 int fdt_shrink_to_minimum(void *blob
);
171 int fdt_increase_size(void *fdt
, int add_len
);
173 int fdt_fixup_nor_flash_size(void *blob
);
175 void fdt_fixup_mtdparts(void *fdt
, void *node_info
, int node_info_size
);
176 void fdt_del_node_and_alias(void *blob
, const char *alias
);
177 u64
fdt_translate_address(void *blob
, int node_offset
, const __be32
*in_addr
);
178 int fdt_node_offset_by_compat_reg(void *blob
, const char *compat
,
179 phys_addr_t compat_off
);
180 int fdt_alloc_phandle(void *blob
);
181 int fdt_set_phandle(void *fdt
, int nodeoffset
, uint32_t phandle
);
182 unsigned int fdt_create_phandle(void *fdt
, int nodeoffset
);
183 int fdt_add_edid(void *blob
, const char *compat
, unsigned char *buf
);
185 int fdt_verify_alias_address(void *fdt
, int anode
, const char *alias
,
187 u64
fdt_get_base_address(void *fdt
, int node
);
188 int fdt_read_range(void *fdt
, int node
, int n
, uint64_t *child_addr
,
189 uint64_t *addr
, uint64_t *len
);
195 FDT_STATUS_FAIL_ERROR_CODE
,
197 int fdt_set_node_status(void *fdt
, int nodeoffset
,
198 enum fdt_status status
, unsigned int error_code
);
199 static inline int fdt_status_okay(void *fdt
, int nodeoffset
)
201 return fdt_set_node_status(fdt
, nodeoffset
, FDT_STATUS_OKAY
, 0);
203 static inline int fdt_status_disabled(void *fdt
, int nodeoffset
)
205 return fdt_set_node_status(fdt
, nodeoffset
, FDT_STATUS_DISABLED
, 0);
207 static inline int fdt_status_fail(void *fdt
, int nodeoffset
)
209 return fdt_set_node_status(fdt
, nodeoffset
, FDT_STATUS_FAIL
, 0);
212 int fdt_set_status_by_alias(void *fdt
, const char *alias
,
213 enum fdt_status status
, unsigned int error_code
);
214 static inline int fdt_status_okay_by_alias(void *fdt
, const char *alias
)
216 return fdt_set_status_by_alias(fdt
, alias
, FDT_STATUS_OKAY
, 0);
218 static inline int fdt_status_disabled_by_alias(void *fdt
, const char *alias
)
220 return fdt_set_status_by_alias(fdt
, alias
, FDT_STATUS_DISABLED
, 0);
222 static inline int fdt_status_fail_by_alias(void *fdt
, const char *alias
)
224 return fdt_set_status_by_alias(fdt
, alias
, FDT_STATUS_FAIL
, 0);
227 /* Helper to read a big number; size is in cells (not bytes) */
228 static inline u64
of_read_number(const fdt32_t
*cell
, int size
)
232 r
= (r
<< 32) | fdt32_to_cpu(*(cell
++));
236 void of_bus_default_count_cells(void *blob
, int parentoffset
,
237 int *addrc
, int *sizec
);
238 int ft_verify_fdt(void *fdt
);
239 int arch_fixup_memory_node(void *blob
);
241 int fdt_setup_simplefb_node(void *fdt
, int node
, u64 base_address
, u32 width
,
242 u32 height
, u32 stride
, const char *format
);
244 #endif /* ifdef CONFIG_OF_LIBFDT */
247 int fdtdec_get_int(const void *blob
, int node
, const char *prop_name
,
250 #endif /* ifndef __FDT_SUPPORT_H */