xref: /openbmc/u-boot/drivers/core/Kconfig (revision 24b852a7)
1menu "Generic Driver Options"
2
3config DM
4	bool "Enable Driver Model"
5	help
6	  This config option enables Driver Model. This brings in the core
7	  support, including scanning of platform data on start-up. If
8	  CONFIG_OF_CONTROL is enabled, the device tree will be scanned also
9	  when available.
10
11config SPL_DM
12	bool "Enable Driver Model for SPL"
13	depends on DM && SPL
14	help
15	  Enable driver model in SPL. You will need to provide a
16	  suitable malloc() implementation. If you are not using the
17	  full malloc() enabled by CONFIG_SYS_SPL_MALLOC_START,
18	  consider using CONFIG_SYS_MALLOC_SIMPLE. In that case you
19	  must provide CONFIG_SYS_MALLOC_F_LEN to set the size.
20	  In most cases driver model will only allocate a few uclasses
21	  and devices in SPL, so 1KB should be enable. See
22	  CONFIG_SYS_MALLOC_F_LEN for more details on how to enable it.
23
24config DM_WARN
25	bool "Enable warnings in driver model"
26	depends on DM
27	default y
28	help
29	  The dm_warn() function can use up quite a bit of space for its
30	  strings. By default this is disabled for SPL builds to save space.
31	  This will cause dm_warn() to be compiled out - it will do nothing
32	  when called.
33
34config DM_DEVICE_REMOVE
35	bool "Support device removal"
36	depends on DM
37	default y
38	help
39	  We can save some code space by dropping support for removing a
40	  device. This is not normally required in SPL, so by default this
41	  option is disabled for SPL.
42
43	  Note that this may have undesirable results in the USB subsystem as
44	  it causes unplugged devices to linger around in the dm-tree, and it
45	  causes USB host controllers to not be stopped when booting the OS.
46
47config DM_STDIO
48	bool "Support stdio registration"
49	depends on DM
50	default y
51	help
52	  Normally serial drivers register with stdio so that they can be used
53	  as normal output devices. In SPL we don't normally use stdio, so
54	  we can omit this feature.
55
56config DM_SEQ_ALIAS
57	bool "Support numbered aliases in device tree"
58	depends on DM
59	default y
60	help
61	  Most boards will have a '/aliases' node containing the path to
62	  numbered devices (e.g. serial0 = &serial0). This feature can be
63	  disabled if it is not required, to save code space in SPL.
64
65config REGMAP
66	bool "Support register maps"
67	depends on DM
68	help
69	  Hardware peripherals tend to have one or more sets of registers
70	  which can be accessed to control the hardware. A register map
71	  models this with a simple read/write interface. It can in principle
72	  support any bus type (I2C, SPI) but so far this only supports
73	  direct memory access.
74
75config SYSCON
76	bool "Support system controllers"
77	depends on REGMAP
78	help
79	  Many SoCs have a number of system controllers which are dealt with
80	  as a group by a single driver. Some common functionality is provided
81	  by this uclass, including accessing registers via regmap and
82	  assigning a unique number to each.
83
84config DEVRES
85	bool "Managed device resources"
86	depends on DM
87	help
88	  This option enables the Managed device resources core support.
89	  Device resources managed by the devres framework are automatically
90	  released whether initialization fails half-way or the device gets
91	  detached.
92
93	  If this option is disabled, devres functions fall back to
94	  non-managed variants.  For example, devres_alloc() to kzalloc(),
95	  devm_kmalloc() to kmalloc(), etc.
96
97config DEBUG_DEVRES
98	bool "Managed device resources debugging functions"
99	depends on DEVRES
100	help
101	  If this option is enabled, devres debug messages are printed.
102	  Also, a function is available to dump a list of device resources.
103	  Select this if you are having a problem with devres or want to
104	  debug resource management for a managed device.
105
106	  If you are unsure about this, Say N here.
107
108config SIMPLE_BUS
109	bool "Support simple-bus driver"
110	depends on DM && OF_CONTROL
111	default y
112	help
113	  Supports the 'simple-bus' driver, which is used on some systems.
114
115config SPL_SIMPLE_BUS
116	bool "Support simple-bus driver in SPL"
117	depends on SPL_DM && SPL_OF_CONTROL
118	default n
119	help
120	  Supports the 'simple-bus' driver, which is used on some systems
121	  in SPL.
122
123config OF_TRANSLATE
124	bool "Translate addresses using fdt_translate_address"
125	depends on DM && OF_CONTROL
126	default y
127	help
128	  If this option is enabled, the reg property will be translated
129	  using the fdt_translate_address() function. This is necessary
130	  on some platforms (e.g. MVEBU) using complex "ranges"
131	  properties in many nodes. As this translation is not handled
132	  correctly in the default simple_bus_translate() function.
133
134	  If this option is not enabled, simple_bus_translate() will be
135	  used for the address translation. This function is faster and
136	  smaller in size than fdt_translate_address().
137
138config SPL_OF_TRANSLATE
139	bool "Translate addresses using fdt_translate_address"
140	depends on SPL_DM && SPL_OF_CONTROL
141	default n
142	help
143	  If this option is enabled, the reg property will be translated
144	  using the fdt_translate_address() function. This is necessary
145	  on some platforms (e.g. MVEBU) using complex "ranges"
146	  properties in many nodes. As this translation is not handled
147	  correctly in the default simple_bus_translate() function.
148
149	  If this option is not enabled, simple_bus_translate() will be
150	  used for the address translation. This function is faster and
151	  smaller in size than fdt_translate_address().
152
153endmenu
154