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driver: ipm: introduce IPM_MAX_DATA_SIZE build configuration

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The ipm_send() allows transferring data through the IPM device.
However, depending on the platform, the mailbox peripheral may either
transmit a limited amount of data or not transfer data at all.
Introducing this configuration allows exposing the IPM capability to the
application.
This commit defines a default value of 1024 bytes to avoid impacting
existing IPM drivers and sets the value to 0 for the STM32 IPCC and
STM32 HSEM devices.

This allows, in a next step, other devices to use this configuration to
expose their capabilities instead of using proprietary configuration or
a static definition.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
This commit is contained in:
Arnaud Pouliquen 2025-04-25 14:29:50 +02:00 • committed by Benjamin Cabé
commit c1a13340ce
1 changed files with 8 additions and 0 deletions
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8
drivers/ipm/Kconfig
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@ -8,6 +8,14 @@ menuconfig IPM
if IPM
config IPM_MAX_DATA_SIZE
int "Max data size supported"
default 0 if IPM_STM32_IPCC || IPM_STM32_HSEM
default 1024
help
Define the max size (in bytes) of data that can be transmitted or
received by the IPM device.
config IPM_MHU
bool "IPM MHU driver"
default y