1# SPDX-License-Identifier: GPL-2.0-only
2menu "ARM System Control and Management Interface Protocol"
3
4config ARM_SCMI_PROTOCOL
5	tristate "ARM System Control and Management Interface (SCMI) Message Protocol"
6	depends on ARM || ARM64 || COMPILE_TEST
7	help
8	  ARM System Control and Management Interface (SCMI) protocol is a
9	  set of operating system-independent software interfaces that are
10	  used in system management. SCMI is extensible and currently provides
11	  interfaces for: Discovery and self-description of the interfaces
12	  it supports, Power domain management which is the ability to place
13	  a given device or domain into the various power-saving states that
14	  it supports, Performance management which is the ability to control
15	  the performance of a domain that is composed of compute engines
16	  such as application processors and other accelerators, Clock
17	  management which is the ability to set and inquire rates on platform
18	  managed clocks and Sensor management which is the ability to read
19	  sensor data, and be notified of sensor value.
20
21	  This protocol library provides interface for all the client drivers
22	  making use of the features offered by the SCMI.
23
24if ARM_SCMI_PROTOCOL
25
26config ARM_SCMI_HAVE_TRANSPORT
27	bool
28	help
29	  This declares whether at least one SCMI transport has been configured.
30	  Used to trigger a build bug when trying to build SCMI without any
31	  configured transport.
32
33config ARM_SCMI_HAVE_SHMEM
34	bool
35	help
36	  This declares whether a shared memory based transport for SCMI is
37	  available.
38
39config ARM_SCMI_HAVE_MSG
40	bool
41	help
42	  This declares whether a message passing based transport for SCMI is
43	  available.
44
45config ARM_SCMI_TRANSPORT_MAILBOX
46	bool "SCMI transport based on Mailbox"
47	depends on MAILBOX
48	select ARM_SCMI_HAVE_TRANSPORT
49	select ARM_SCMI_HAVE_SHMEM
50	default y
51	help
52	  Enable mailbox based transport for SCMI.
53
54	  If you want the ARM SCMI PROTOCOL stack to include support for a
55	  transport based on mailboxes, answer Y.
56
57config ARM_SCMI_TRANSPORT_OPTEE
58	bool "SCMI transport based on OP-TEE service"
59	depends on OPTEE=y || OPTEE=ARM_SCMI_PROTOCOL
60	select ARM_SCMI_HAVE_TRANSPORT
61	select ARM_SCMI_HAVE_SHMEM
62	default y
63	help
64	  This enables the OP-TEE service based transport for SCMI.
65
66	  If you want the ARM SCMI PROTOCOL stack to include support for a
67	  transport based on OP-TEE SCMI service, answer Y.
68
69config ARM_SCMI_TRANSPORT_SMC
70	bool "SCMI transport based on SMC"
71	depends on HAVE_ARM_SMCCC_DISCOVERY
72	select ARM_SCMI_HAVE_TRANSPORT
73	select ARM_SCMI_HAVE_SHMEM
74	default y
75	help
76	  Enable SMC based transport for SCMI.
77
78	  If you want the ARM SCMI PROTOCOL stack to include support for a
79	  transport based on SMC, answer Y.
80
81config ARM_SCMI_TRANSPORT_VIRTIO
82	bool "SCMI transport based on VirtIO"
83	depends on VIRTIO=y || VIRTIO=ARM_SCMI_PROTOCOL
84	select ARM_SCMI_HAVE_TRANSPORT
85	select ARM_SCMI_HAVE_MSG
86	help
87	  This enables the virtio based transport for SCMI.
88
89	  If you want the ARM SCMI PROTOCOL stack to include support for a
90	  transport based on VirtIO, answer Y.
91
92config ARM_SCMI_TRANSPORT_VIRTIO_VERSION1_COMPLIANCE
93	bool "SCMI VirtIO transport Version 1 compliance"
94	depends on ARM_SCMI_TRANSPORT_VIRTIO
95	default y
96	help
97	  This enforces strict compliance with VirtIO Version 1 specification.
98
99	  If you want the ARM SCMI VirtIO transport layer to refuse to work
100	  with Legacy VirtIO backends and instead support only VirtIO Version 1
101	  devices (or above), answer Y.
102
103	  If you want instead to support also old Legacy VirtIO backends (like
104	  the ones implemented by kvmtool) and let the core Kernel VirtIO layer
105	  take care of the needed conversions, say N.
106
107endif #ARM_SCMI_PROTOCOL
108
109config ARM_SCMI_POWER_DOMAIN
110	tristate "SCMI power domain driver"
111	depends on ARM_SCMI_PROTOCOL || (COMPILE_TEST && OF)
112	default y
113	select PM_GENERIC_DOMAINS if PM
114	help
115	  This enables support for the SCMI power domains which can be
116	  enabled or disabled via the SCP firmware
117
118	  This driver can also be built as a module.  If so, the module
119	  will be called scmi_pm_domain. Note this may needed early in boot
120	  before rootfs may be available.
121
122endmenu
123