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_SMC
58	bool "SCMI transport based on SMC"
59	depends on HAVE_ARM_SMCCC_DISCOVERY
60	select ARM_SCMI_HAVE_TRANSPORT
61	select ARM_SCMI_HAVE_SHMEM
62	default y
63	help
64	  Enable SMC based transport for SCMI.
65
66	  If you want the ARM SCMI PROTOCOL stack to include support for a
67	  transport based on SMC, answer Y.
68
69config ARM_SCMI_TRANSPORT_VIRTIO
70	bool "SCMI transport based on VirtIO"
71	depends on VIRTIO=y || VIRTIO=ARM_SCMI_PROTOCOL
72	select ARM_SCMI_HAVE_TRANSPORT
73	select ARM_SCMI_HAVE_MSG
74	help
75	  This enables the virtio based transport for SCMI.
76
77	  If you want the ARM SCMI PROTOCOL stack to include support for a
78	  transport based on VirtIO, answer Y.
79
80endif #ARM_SCMI_PROTOCOL
81
82config ARM_SCMI_POWER_DOMAIN
83	tristate "SCMI power domain driver"
84	depends on ARM_SCMI_PROTOCOL || (COMPILE_TEST && OF)
85	default y
86	select PM_GENERIC_DOMAINS if PM
87	help
88	  This enables support for the SCMI power domains which can be
89	  enabled or disabled via the SCP firmware
90
91	  This driver can also be built as a module.  If so, the module
92	  will be called scmi_pm_domain. Note this may needed early in boot
93	  before rootfs may be available.
94
95endmenu
96