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git01.mediatek.com / filogic / uboot / 991402ead299483100240a883907f2fe85a4989e / . / dts / Kconfig
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Masahiro Yamada9fadbc82014-09-22 19:59:05 +0900[diff] [blame]1#
2# Device Tree Control
3#
Masahiro Yamada9fadbc82014-09-22 19:59:05 +0900[diff] [blame]4
5config SUPPORT_OF_CONTROL
6 bool
7
8menu "Device Tree Control"
Masahiro Yamada9fadbc82014-09-22 19:59:05 +0900[diff] [blame]9 depends on SUPPORT_OF_CONTROL
10
11config OF_CONTROL
12 bool "Run-time configuration via Device Tree"
13 help
14 This feature provides for run-time configuration of U-Boot
15 via a flattened device tree.
16
Masahiro Yamada1e35f392015-08-12 07:31:54 +0900[diff] [blame]17config SPL_OF_CONTROL
18 bool "Enable run-time configuration via Device Tree in SPL"
19 depends on SPL && OF_CONTROL
Simon Glass400d0402015-02-27 22:06:38 -0700[diff] [blame]20 help
21 Some boards use device tree in U-Boot but only have 4KB of SRAM
22 which is not enough to support device tree. Enable this option to
23 allow such boards to be supported by U-Boot SPL.
24
Masahiro Yamada9fadbc82014-09-22 19:59:05 +0900[diff] [blame]25choice
26 prompt "Provider of DTB for DT control"
27 depends on OF_CONTROL
28
29config OF_SEPARATE
30 bool "Separate DTB for DT control"
31 depends on !SANDBOX
32 help
33 If this option is enabled, the device tree will be built and
34 placed as a separate u-boot.dtb file alongside the U-Boot image.
35
36config OF_EMBED
37 bool "Embedded DTB for DT control"
38 help
39 If this option is enabled, the device tree will be picked up and
Simon Glassd9b64ea2015-08-31 18:47:52 -0600[diff] [blame]40 built into the U-Boot image. This is suitable for local debugging
41 and development only and is not recommended for production devices.
42 Boards in the mainline U-Boot tree should not use it.
Masahiro Yamada9fadbc82014-09-22 19:59:05 +0900[diff] [blame]43
44config OF_HOSTFILE
45 bool "Host filed DTB for DT control"
46 depends on SANDBOX
47 help
48 If this option is enabled, DTB will be read from a file on startup.
49 This is only useful for Sandbox. Use the -d flag to U-Boot to
50 specify the file to read.
51
52endchoice
53
Masahiro Yamada8c65b9d2014-09-22 19:59:06 +0900[diff] [blame]54config DEFAULT_DEVICE_TREE
55 string "Default Device Tree for DT control"
Simon Glass644f5bc2016-02-22 22:55:44 -0700[diff] [blame]56 depends on OF_CONTROL
Masahiro Yamada8c65b9d2014-09-22 19:59:06 +0900[diff] [blame]57 help
58 This option specifies the default Device Tree used for DT control.
Robert P. J. Dayeb61df52014-10-21 16:44:32 -0400[diff] [blame]59 It can be overridden from the command line:
Masahiro Yamada8c65b9d2014-09-22 19:59:06 +0900[diff] [blame]60 $ make DEVICE_TREE=<device-tree-name>
61
Simon Glass963817b2016-02-22 22:55:57 -0700[diff] [blame]62config OF_LIST
63 string "List of device tree files to include for DT control"
64 depends on SPL_LOAD_FIT
Michal Simek9b2e95a2016-05-04 15:14:11 +0200[diff] [blame]65 default DEFAULT_DEVICE_TREE
Simon Glass963817b2016-02-22 22:55:57 -0700[diff] [blame]66 help
67 This option specifies a list of device tree files to use for DT
68 control. These will be packaged into a FIT. At run-time, SPL will
69 select the correct DT to use by examining the hardware (e.g.
70 reading a board ID value). This is a list of device tree files
71 (without the directory or .dtb suffix) separated by <space>.
72
Simon Glass89caf332015-06-23 15:38:29 -0600[diff] [blame]73config OF_SPL_REMOVE_PROPS
74 string "List of device tree properties to drop for SPL"
Masahiro Yamadaddb9aa972015-08-28 20:28:42 +0900[diff] [blame]75 depends on SPL_OF_CONTROL
Masahiro Yamadaf03811c2016-02-03 20:51:36 +0900[diff] [blame]76 default "interrupt-parent" if SPL_PINCTRL_FULL && SPL_CLK
Masahiro Yamadac34793c2015-08-31 19:36:24 +0900[diff] [blame]77 default "clocks clock-names interrupt-parent" if SPL_PINCTRL_FULL
Masahiro Yamadaf03811c2016-02-03 20:51:36 +0900[diff] [blame]78 default "pinctrl-0 pinctrl-names interrupt-parent" if SPL_CLK
Simon Glass89caf332015-06-23 15:38:29 -0600[diff] [blame]79 default "pinctrl-0 pinctrl-names clocks clock-names interrupt-parent"
80 help
81 Since SPL normally runs in a reduced memory space, the device tree
82 is cut down to only what is needed to load and start U-Boot. Only
83 nodes marked with the property "u-boot,dm-pre-reloc" will be
84 included. In addition, some properties are not used by U-Boot and
85 can be discarded. This option defines the list of properties to
86 discard.
87
Simon Glass7bc65f32016-07-04 11:58:06 -0600[diff] [blame]88config SPL_OF_PLATDATA
89 bool "Generate platform data for use in SPL"
90 depends on SPL_OF_CONTROL
91 help
92 For very constrained SPL environments the overhead of decoding
93 device tree nodes and converting their contents into platform data
94 is too large. This overhead includes libfdt code as well as the
95 device tree contents itself. The latter is fairly compact, but the
96 former can add 3KB or more to a Thumb 2 Image.
97
98 This option enables generation of platform data from the device
99 tree as C code. This code creates devices using U_BOOT_DEVICE()
100 declarations. The benefit is that it allows driver code to access
101 the platform data directly in C structures, avoidin the libfdt
102 overhead.
103
104 This option works by generating C structure declarations for each
105 compatible string, then adding platform data and U_BOOT_DEVICE
106 declarations for each node. See README.platdata for more
107 information.
108
Masahiro Yamada9fadbc82014-09-22 19:59:05 +0900[diff] [blame]109endmenu