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Masahiro Yamada	783e6a7	2014-09-22 19:59:05 +0900	[diff] [blame]	1	#
				2	# Device Tree Control
				3	#
Masahiro Yamada	783e6a7	2014-09-22 19:59:05 +0900	[diff] [blame]	4
				5	config SUPPORT_OF_CONTROL
				6	bool
				7
				8	menu "Device Tree Control"
Masahiro Yamada	783e6a7	2014-09-22 19:59:05 +0900	[diff] [blame]	9	depends on SUPPORT_OF_CONTROL
				10
				11	config 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 Yamada	dffb86e	2015-08-12 07:31:54 +0900	[diff] [blame]	17	config SPL_OF_CONTROL
				18	bool "Enable run-time configuration via Device Tree in SPL"
				19	depends on SPL && OF_CONTROL
Simon Glass	2860f03	2015-02-27 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 Yamada	783e6a7	2014-09-22 19:59:05 +0900	[diff] [blame]	25	choice
				26	prompt "Provider of DTB for DT control"
				27	depends on OF_CONTROL
				28
				29	config 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
				36	config 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 Glass	3d3f60c	2015-08-31 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 Yamada	783e6a7	2014-09-22 19:59:05 +0900	[diff] [blame]	43
				44	config 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
				52	endchoice
				53
Masahiro Yamada	f1ef2b6	2014-09-22 19:59:06 +0900	[diff] [blame]	54	config DEFAULT_DEVICE_TREE
				55	string "Default Device Tree for DT control"
Simon Glass	70d4109	2016-02-22 22:55:44 -0700	[diff] [blame]	56	depends on OF_CONTROL
Masahiro Yamada	f1ef2b6	2014-09-22 19:59:06 +0900	[diff] [blame]	57	help
				58	This option specifies the default Device Tree used for DT control.
Robert P. J. Day	5699ea6	2014-10-21 16:44:32 -0400	[diff] [blame]	59	It can be overridden from the command line:
Masahiro Yamada	f1ef2b6	2014-09-22 19:59:06 +0900	[diff] [blame]	60	$ make DEVICE_TREE=<device-tree-name>
				61
Simon Glass	cdf1724	2016-02-22 22:55:57 -0700	[diff] [blame]	62	config OF_LIST
				63	string "List of device tree files to include for DT control"
				64	depends on SPL_LOAD_FIT
Michal Simek	c409bd0	2016-05-04 15:14:11 +0200	[diff] [blame]	65	default DEFAULT_DEVICE_TREE
Simon Glass	cdf1724	2016-02-22 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 Glass	fa78e0a	2015-06-23 15:38:29 -0600	[diff] [blame]	73	config OF_SPL_REMOVE_PROPS
				74	string "List of device tree properties to drop for SPL"
Masahiro Yamada	897705e	2015-08-28 20:28:42 +0900	[diff] [blame]	75	depends on SPL_OF_CONTROL
Masahiro Yamada	5f3f7b7	2016-02-03 20:51:36 +0900	[diff] [blame]	76	default "interrupt-parent" if SPL_PINCTRL_FULL && SPL_CLK
Masahiro Yamada	6aa8179	2015-08-31 19:36:24 +0900	[diff] [blame]	77	default "clocks clock-names interrupt-parent" if SPL_PINCTRL_FULL
Masahiro Yamada	5f3f7b7	2016-02-03 20:51:36 +0900	[diff] [blame]	78	default "pinctrl-0 pinctrl-names interrupt-parent" if SPL_CLK
Simon Glass	fa78e0a	2015-06-23 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 Glass	2789ddb	2016-07-04 11:58:06 -0600	[diff] [blame]	88	config 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 Yamada	783e6a7	2014-09-22 19:59:05 +0900	[diff] [blame]	109	endmenu