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Masahiro Yamada783e6a72014-09-22 19:59:05 +09001#
2# Device Tree Control
3#
Masahiro Yamada783e6a72014-09-22 19:59:05 +09004
5config SUPPORT_OF_CONTROL
6 bool
7
Tom Rini36dd5f12017-09-23 13:00:57 -04008config DTC
9 bool
10
Masahiro Yamadad6a0c782017-10-17 13:42:44 +090011config PYLIBFDT
12 bool
13
14config DTOC
15 bool
16 select PYLIBFDT
17
18config BINMAN
19 bool
20 select DTOC
21
Masahiro Yamada783e6a72014-09-22 19:59:05 +090022menu "Device Tree Control"
Masahiro Yamada783e6a72014-09-22 19:59:05 +090023 depends on SUPPORT_OF_CONTROL
24
25config OF_CONTROL
26 bool "Run-time configuration via Device Tree"
Tom Rini36dd5f12017-09-23 13:00:57 -040027 select DTC
Sean Anderson327bb3b2019-12-17 21:40:09 -050028 select OF_LIBFDT if !OF_PLATDATA
Masahiro Yamada783e6a72014-09-22 19:59:05 +090029 help
30 This feature provides for run-time configuration of U-Boot
31 via a flattened device tree.
32
mario.six@gdsys.cc2a792752017-02-22 16:07:22 +010033config OF_BOARD_FIXUP
34 bool "Board-specific manipulation of Device Tree"
35 help
36 In certain circumstances it is necessary to be able to modify
37 U-Boot's device tree (e.g. to delete device from it). This option
38 make the Device Tree writeable and provides a board-specific
39 "board_fix_fdt" callback (called during pre-relocation time), which
40 enables the board initialization to modifiy the Device Tree. The
41 modified copy is subsequently used by U-Boot after relocation.
42
Masahiro Yamadadffb86e2015-08-12 07:31:54 +090043config SPL_OF_CONTROL
44 bool "Enable run-time configuration via Device Tree in SPL"
45 depends on SPL && OF_CONTROL
Sean Anderson327bb3b2019-12-17 21:40:09 -050046 select SPL_OF_LIBFDT if !SPL_OF_PLATDATA
Simon Glass2860f032015-02-27 22:06:38 -070047 help
48 Some boards use device tree in U-Boot but only have 4KB of SRAM
Walter Lozanoc9acae32019-10-22 11:50:19 -030049 which is not enough to support device tree. Disable this option to
Simon Glass2860f032015-02-27 22:06:38 -070050 allow such boards to be supported by U-Boot SPL.
51
Philipp Tomsichf291ce12017-06-29 11:11:21 +020052config TPL_OF_CONTROL
53 bool "Enable run-time configuration via Device Tree in TPL"
54 depends on TPL && OF_CONTROL
Sean Anderson327bb3b2019-12-17 21:40:09 -050055 select TPL_OF_LIBFDT if !TPL_OF_PLATDATA
Philipp Tomsichf291ce12017-06-29 11:11:21 +020056 help
57 Some boards use device tree in U-Boot but only have 4KB of SRAM
58 which is not enough to support device tree. Enable this option to
59 allow such boards to be supported by U-Boot TPL.
60
Simon Glass5e060d82017-05-18 20:08:53 -060061config OF_LIVE
62 bool "Enable use of a live tree"
63 depends on OF_CONTROL
64 help
65 Normally U-Boot uses a flat device tree which saves space and
66 avoids the need to unpack the tree before use. However a flat
Michal Simek4adc6602018-08-17 10:16:36 +020067 tree does not support modification from within U-Boot since it
Simon Glass5e060d82017-05-18 20:08:53 -060068 can invalidate driver-model device tree offsets. This option
69 enables a live tree which is available after relocation,
70 and can be adjusted as needed.
71
Masahiro Yamada783e6a72014-09-22 19:59:05 +090072choice
73 prompt "Provider of DTB for DT control"
74 depends on OF_CONTROL
75
76config OF_SEPARATE
77 bool "Separate DTB for DT control"
78 depends on !SANDBOX
79 help
80 If this option is enabled, the device tree will be built and
81 placed as a separate u-boot.dtb file alongside the U-Boot image.
82
83config OF_EMBED
84 bool "Embedded DTB for DT control"
85 help
86 If this option is enabled, the device tree will be picked up and
Simon Glass3d3f60c2015-08-31 18:47:52 -060087 built into the U-Boot image. This is suitable for local debugging
88 and development only and is not recommended for production devices.
89 Boards in the mainline U-Boot tree should not use it.
Masahiro Yamada783e6a72014-09-22 19:59:05 +090090
Alex Deymo82f766d2017-04-02 01:25:20 -070091config OF_BOARD
92 bool "Provided by the board at runtime"
93 depends on !SANDBOX
94 help
95 If this option is enabled, the device tree will be provided by
96 the board at runtime if the board supports it, instead of being
97 bundled with the image.
98
Masahiro Yamada783e6a72014-09-22 19:59:05 +090099config OF_HOSTFILE
100 bool "Host filed DTB for DT control"
101 depends on SANDBOX
102 help
103 If this option is enabled, DTB will be read from a file on startup.
104 This is only useful for Sandbox. Use the -d flag to U-Boot to
105 specify the file to read.
106
Thomas Fitzsimmons894c3ad2018-06-08 17:59:45 -0400107config OF_PRIOR_STAGE
108 bool "Prior stage bootloader DTB for DT control"
109 help
110 If this option is enabled, the device tree used for DT
111 control will be read from a device tree binary, at a memory
112 location passed to U-Boot by the prior stage bootloader.
113
Masahiro Yamada783e6a72014-09-22 19:59:05 +0900114endchoice
115
Masahiro Yamadaf1ef2b62014-09-22 19:59:06 +0900116config DEFAULT_DEVICE_TREE
117 string "Default Device Tree for DT control"
Simon Glass70d41092016-02-22 22:55:44 -0700118 depends on OF_CONTROL
Masahiro Yamadaf1ef2b62014-09-22 19:59:06 +0900119 help
120 This option specifies the default Device Tree used for DT control.
Robert P. J. Day5699ea62014-10-21 16:44:32 -0400121 It can be overridden from the command line:
Masahiro Yamadaf1ef2b62014-09-22 19:59:06 +0900122 $ make DEVICE_TREE=<device-tree-name>
123
Simon Glasscdf17242016-02-22 22:55:57 -0700124config OF_LIST
125 string "List of device tree files to include for DT control"
Jean-Jacques Hiblot11955592017-09-15 12:57:24 +0200126 depends on SPL_LOAD_FIT || MULTI_DTB_FIT
Michal Simekc409bd02016-05-04 15:14:11 +0200127 default DEFAULT_DEVICE_TREE
Simon Glasscdf17242016-02-22 22:55:57 -0700128 help
129 This option specifies a list of device tree files to use for DT
Cooper Jr., Franklind9797402017-06-16 17:25:09 -0500130 control. These will be packaged into a FIT. At run-time, U-boot
131 or SPL will select the correct DT to use by examining the
132 hardware (e.g. reading a board ID value). This is a list of
133 device tree files (without the directory or .dtb suffix)
134 separated by <space>.
Simon Glasscdf17242016-02-22 22:55:57 -0700135
Jean-Jacques Hiblot557bc972019-10-22 16:39:21 +0200136config OF_OVERLAY_LIST
137 string "List of device tree overlays to include for DT control"
138 depends on SPL_LOAD_FIT_APPLY_OVERLAY
139 help
140 This option specifies a list of device tree overlays to use for DT
141 control. This option can then be used by a FIT generator to include
142 the overlays in the FIT image.
143
Marek Vasut95f4bbd2019-03-08 16:06:55 +0100144choice
Baruch Siach574e3862019-10-07 15:05:47 +0300145 prompt "OF LIST compression"
Marek Vasut95f4bbd2019-03-08 16:06:55 +0100146 depends on MULTI_DTB_FIT
147 default MULTI_DTB_FIT_NO_COMPRESSION
148
149config MULTI_DTB_FIT_LZO
150 bool "LZO"
151 depends on SYS_MALLOC_F
152 select LZO
153 help
154 Compress the FIT image containing the DTBs available for the SPL
155 using LZO compression. (requires lzop on host).
156
157config MULTI_DTB_FIT_GZIP
158 bool "GZIP"
159 depends on SYS_MALLOC_F
160 select GZIP
161 help
162 Compress the FIT image containing the DTBs available for the SPL
163 using GZIP compression. (requires gzip on host)
164
165config MULTI_DTB_FIT_NO_COMPRESSION
166 bool "No compression"
167 help
168 Do not compress the FIT image containing the DTBs available for the SPL.
169 Use this options only if LZO is not available and the DTBs are very small.
170endchoice
171
172choice
173 prompt "Location of uncompressed DTBs"
174 depends on (MULTI_DTB_FIT_GZIP || MULTI_DTB_FIT_LZO)
175 default MULTI_DTB_FIT_DYN_ALLOC if SYS_MALLOC_F
176
177config MULTI_DTB_FIT_DYN_ALLOC
178 bool "Dynamically allocate the memory"
179 depends on SYS_MALLOC_F
180
181config MULTI_DTB_FIT_USER_DEFINED_AREA
182 bool "User-defined location"
183endchoice
184
185config MULTI_DTB_FIT_UNCOMPRESS_SZ
186 hex "Size of memory reserved to uncompress the DTBs"
187 depends on (MULTI_DTB_FIT_GZIP || MULTI_DTB_FIT_LZO)
188 default 0x8000
189 help
190 This is the size of this area where the DTBs are uncompressed.
191 If this area is dynamically allocated, make sure that
192 SYS_MALLOC_F_LEN is big enough to contain it.
193
194config MULTI_DTB_FIT_USER_DEF_ADDR
195 hex "Address of memory where dtbs are uncompressed"
196 depends on MULTI_DTB_FIT_USER_DEFINED_AREA
197 help
198 the FIT image containing the DTBs is uncompressed in an area defined
199 at compilation time. This is the address of this area. It must be
200 aligned on 2-byte boundary.
Jean-Jacques Hiblot11955592017-09-15 12:57:24 +0200201
202config DTB_RESELECT
203 bool "Support swapping dtbs at a later point in boot"
204 depends on MULTI_DTB_FIT
205 help
206 It is possible during initial boot you may need to use a generic
207 dtb until you can fully determine the board your running on. This
208 config allows boards to implement a function at a later point
209 during boot to switch to the "correct" dtb.
210
211config MULTI_DTB_FIT
212 bool "Support embedding several DTBs in a FIT image for u-boot"
213 help
214 This option provides hooks to allow U-boot to parse an
215 appended FIT image and enable board specific code to then select
216 the correct DTB to be used. Use this if you need to support
217 multiple DTBs but don't use the SPL.
218
Jean-Jacques Hiblot2f57c952017-09-15 12:57:32 +0200219
220config SPL_MULTI_DTB_FIT
221 depends on SPL_LOAD_FIT && SPL_OF_CONTROL && !SPL_OF_PLATDATA
222 bool "Support embedding several DTBs in a FIT image for the SPL"
223 help
224 This option provides the SPL with the ability to select its own
225 DTB at runtime from an appended FIT image containing several DTBs.
226 This allows using the same SPL binary on multiple platforms.
227 The primary purpose is to handle different versions of
228 the same platform without tweaking the platform code if the
229 differences can be expressed in the DTBs (common examples are: bus
230 capabilities, pad configurations).
231
232config SPL_OF_LIST
233 string "List of device tree files to include for DT control in SPL"
234 depends on SPL_MULTI_DTB_FIT
235 default OF_LIST
236 help
237 This option specifies a list of device tree files to use for DT
238 control in the SPL. These will be packaged into a FIT. At run-time,
239 the SPL will select the correct DT to use by examining the
240 hardware (e.g. reading a board ID value). This is a list of
241 device tree files (without the directory or .dtb suffix)
242 separated by <space>.
243
244choice
245 prompt "SPL OF LIST compression"
246 depends on SPL_MULTI_DTB_FIT
247 default SPL_MULTI_DTB_FIT_LZO
248
249config SPL_MULTI_DTB_FIT_LZO
250 bool "LZO"
251 depends on SYS_MALLOC_F
252 select SPL_LZO
253 help
254 Compress the FIT image containing the DTBs available for the SPL
255 using LZO compression. (requires lzop on host).
256
257config SPL_MULTI_DTB_FIT_GZIP
258 bool "GZIP"
259 depends on SYS_MALLOC_F
260 select SPL_GZIP
261 help
262 Compress the FIT image containing the DTBs available for the SPL
263 using GZIP compression. (requires gzip on host)
264
265config SPL_MULTI_DTB_FIT_NO_COMPRESSION
266 bool "No compression"
267 help
268 Do not compress the FIT image containing the DTBs available for the SPL.
269 Use this options only if LZO is not available and the DTBs are very small.
270endchoice
271
272choice
Michal Simekb8448052018-07-23 08:38:56 +0200273 prompt "Location of uncompressed DTBs"
Jean-Jacques Hiblot2f57c952017-09-15 12:57:32 +0200274 depends on (SPL_MULTI_DTB_FIT_GZIP || SPL_MULTI_DTB_FIT_LZO)
275 default SPL_MULTI_DTB_FIT_DYN_ALLOC if SYS_MALLOC_F
276
277config SPL_MULTI_DTB_FIT_DYN_ALLOC
278 bool "Dynamically allocate the memory"
279 depends on SYS_MALLOC_F
280
281config SPL_MULTI_DTB_FIT_USER_DEFINED_AREA
282 bool "User-defined location"
283endchoice
284
285config SPL_MULTI_DTB_FIT_UNCOMPRESS_SZ
286 hex "Size of memory reserved to uncompress the DTBs"
287 depends on (SPL_MULTI_DTB_FIT_GZIP || SPL_MULTI_DTB_FIT_LZO)
288 default 0x8000
289 help
290 This is the size of this area where the DTBs are uncompressed.
291 If this area is dynamically allocated, make sure that
292 SPL_SYS_MALLOC_F_LEN is big enough to contain it.
293
294config SPL_MULTI_DTB_FIT_USER_DEF_ADDR
295 hex "Address of memory where dtbs are uncompressed"
296 depends on SPL_MULTI_DTB_FIT_USER_DEFINED_AREA
297 help
298 the FIT image containing the DTBs is uncompressed in an area defined
299 at compilation time. This is the address of this area. It must be
300 aligned on 2-byte boundary.
301
Simon Glassfa78e0a2015-06-23 15:38:29 -0600302config OF_SPL_REMOVE_PROPS
303 string "List of device tree properties to drop for SPL"
Masahiro Yamada897705e2015-08-28 20:28:42 +0900304 depends on SPL_OF_CONTROL
Michal Simekf00d89f2019-02-22 10:50:23 +0100305 default "interrupt-parent interrupts" if SPL_PINCTRL && SPL_CLK
306 default "clocks clock-names interrupt-parent interrupts" if SPL_PINCTRL
307 default "pinctrl-0 pinctrl-names interrupt-parent interrupts" if SPL_CLK
308 default "pinctrl-0 pinctrl-names clocks clock-names interrupt-parent interrupts"
Simon Glassfa78e0a2015-06-23 15:38:29 -0600309 help
310 Since SPL normally runs in a reduced memory space, the device tree
311 is cut down to only what is needed to load and start U-Boot. Only
312 nodes marked with the property "u-boot,dm-pre-reloc" will be
313 included. In addition, some properties are not used by U-Boot and
314 can be discarded. This option defines the list of properties to
315 discard.
316
Simon Glass2789ddb2016-07-04 11:58:06 -0600317config SPL_OF_PLATDATA
318 bool "Generate platform data for use in SPL"
319 depends on SPL_OF_CONTROL
Masahiro Yamadad6a0c782017-10-17 13:42:44 +0900320 select DTOC
Simon Glass2789ddb2016-07-04 11:58:06 -0600321 help
322 For very constrained SPL environments the overhead of decoding
323 device tree nodes and converting their contents into platform data
324 is too large. This overhead includes libfdt code as well as the
325 device tree contents itself. The latter is fairly compact, but the
326 former can add 3KB or more to a Thumb 2 Image.
327
328 This option enables generation of platform data from the device
329 tree as C code. This code creates devices using U_BOOT_DEVICE()
330 declarations. The benefit is that it allows driver code to access
331 the platform data directly in C structures, avoidin the libfdt
332 overhead.
333
334 This option works by generating C structure declarations for each
335 compatible string, then adding platform data and U_BOOT_DEVICE
Simon Goldschmidt3600b462019-01-16 20:40:18 +0100336 declarations for each node. See of-plat.txt for more information.
Simon Glass2789ddb2016-07-04 11:58:06 -0600337
Philipp Tomsichf291ce12017-06-29 11:11:21 +0200338config TPL_OF_PLATDATA
339 bool "Generate platform data for use in TPL"
340 depends on TPL_OF_CONTROL
Masahiro Yamadad6a0c782017-10-17 13:42:44 +0900341 select DTOC
Philipp Tomsichf291ce12017-06-29 11:11:21 +0200342 help
343 For very constrained SPL environments the overhead of decoding
344 device tree nodes and converting their contents into platform data
345 is too large. This overhead includes libfdt code as well as the
346 device tree contents itself. The latter is fairly compact, but the
347 former can add 3KB or more to a Thumb 2 Image.
348
349 This option enables generation of platform data from the device
350 tree as C code. This code creates devices using U_BOOT_DEVICE()
351 declarations. The benefit is that it allows driver code to access
352 the platform data directly in C structures, avoidin the libfdt
353 overhead.
354
355 This option works by generating C structure declarations for each
356 compatible string, then adding platform data and U_BOOT_DEVICE
Simon Goldschmidt3600b462019-01-16 20:40:18 +0100357 declarations for each node. See of-plat.txt for more information.
Philipp Tomsichf291ce12017-06-29 11:11:21 +0200358
Masahiro Yamada783e6a72014-09-22 19:59:05 +0900359endmenu
Tom Rini1f6049e2017-09-23 23:14:33 -0400360
361config MKIMAGE_DTC_PATH
362 string "Path to dtc binary for use within mkimage"
363 default "dtc"
364 help
365 The mkimage host tool will, in order to generate FIT images make
366 calls to the dtc application in order to create the output. In
367 some cases the system dtc may not support all required features
368 and the path to a different version should be given here.