| # |
| # SPDX-FileCopyrightText: <text>Copyright 2024-2025 Arm Limited and/or its |
| # affiliates <open-source-office@arm.com></text> |
| # |
| # SPDX-License-Identifier: Apache-2.0 |
| |
| config MBOX_MHUV3 |
| bool "ARM MHUv3 mailbox driver" |
| depends on DT_HAS_ARM_MHUV3_ENABLED |
| default y |
| help |
| Driver for Arm MHUv3 (Message Handling Unit v3) |
| |
| if MBOX_MHUV3 |
| |
| config MBOX_MHUV3_NUM_DBCH |
| int "ARM MHUv3 mailbox doorbell number of channels" |
| default 0 |
| help |
| Maximum number of doorbell channels allowed in the Postbox/Mailbox. |
| This number has to be less than or equal to (NUM_DBCH + 1) in PBX_DBCH_CFG0/MBX_DBCH_CFG0 registers. |
| If the doorbell extension is supported then this number has to be bigger than zero. |
| MHUv3 allows up to 128 doorbell channels. |
| This configuration parameter is needed to avoid the dynamic memory allocation of doorbell channels |
| data structures. |
| |
| endif |
