xref: /openbmc/u-boot/drivers/core/Kconfig (revision 95de1e2f)
1config DM
2	bool "Enable Driver Model"
3	help
4	  This config option enables Driver Model. This brings in the core
5	  support, including scanning of platform data on start-up. If
6	  CONFIG_OF_CONTROL is enabled, the device tree will be scanned also
7	  when available.
8
9config SPL_DM
10	bool "Enable Driver Model for SPL"
11	depends on DM && SPL
12	help
13	  Enable driver model in SPL. You will need to provide a
14	  suitable malloc() implementation. If you are not using the
15	  full malloc() enabled by CONFIG_SYS_SPL_MALLOC_START,
16	  consider using CONFIG_SYS_MALLOC_SIMPLE. In that case you
17	  must provide CONFIG_SYS_MALLOC_F_LEN to set the size.
18	  In most cases driver model will only allocate a few uclasses
19	  and devices in SPL, so 1KB should be enable. See
20	  CONFIG_SYS_MALLOC_F_LEN for more details on how to enable it.
21
22config DM_WARN
23	bool "Enable warnings in driver model"
24	depends on DM
25	default y
26	help
27	  The dm_warn() function can use up quite a bit of space for its
28	  strings. By default this is disabled for SPL builds to save space.
29	  This will cause dm_warn() to be compiled out - it will do nothing
30	  when called.
31
32config DM_DEVICE_REMOVE
33	bool "Support device removal"
34	depends on DM
35	default y
36	help
37	  We can save some code space by dropping support for removing a
38	  device. This is not normally required in SPL, so by default this
39	  option is disabled for SPL.
40
41	  Note that this may have undesirable results in the USB subsystem as
42	  it causes unplugged devices to linger around in the dm-tree, and it
43	  causes USB host controllers to not be stopped when booting the OS.
44
45config DM_STDIO
46	bool "Support stdio registration"
47	depends on DM
48	default y
49	help
50	  Normally serial drivers register with stdio so that they can be used
51	  as normal output devices. In SPL we don't normally use stdio, so
52	  we can omit this feature.
53
54config DM_SEQ_ALIAS
55	bool "Support numbered aliases in device tree"
56	depends on DM
57	default y
58	help
59	  Most boards will have a '/aliases' node containing the path to
60	  numbered devices (e.g. serial0 = &serial0). This feature can be
61	  disabled if it is not required, to save code space in SPL.
62