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soc: silabs: siwx91x: Initialize NWP sufficiently early

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The NWP provides Bluetooth, Wi-Fi and crypto services, and must
be initialized before any users of these. Mbed TLS is initialized
at priority level 40 (kernel default priority), ensure that the
NWP is initialized before that.

Make the priority configurable to allow users to tweak the init
sequence.

Signed-off-by: Aksel Skauge Mellbye <aksel.mellbye@silabs.com>
This commit is contained in:
Aksel Skauge Mellbye 2025-05-12 13:13:16 +02:00 • committed by Benjamin Cabé
commit 6a7cbff9b2
2 changed files with 13 additions and 1 deletions
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8
soc/silabs/silabs_siwx91x/Kconfig
View file

@ -19,4 +19,12 @@ config SOC_SILABS_SLEEPTIMER
help
The Sleeptimer HAL module is used for SIWX91X.
config SIWX91X_NWP_INIT_PRIORITY
int "SiWx91x Network Processor init priority"
default 39
help
Initialization priority of the SiWx91x Network Processor. NWP init must
have a higher priority than services that depend on it, such as Bluetooth,
Wi-Fi and crypto.
endif # SOC_FAMILY_SILABS_SIWX91X

6
soc/silabs/silabs_siwx91x/siwg917/nwp.c
View file

@ -193,7 +193,11 @@ static int siwg917_nwp_init(void)
return 0;
}
SYS_INIT(siwg917_nwp_init, POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEVICE);
#if defined(CONFIG_MBEDTLS_INIT)
BUILD_ASSERT(CONFIG_SIWX91X_NWP_INIT_PRIORITY < CONFIG_KERNEL_INIT_PRIORITY_DEFAULT,
"mbed TLS must be initialized after the NWP.");
#endif
SYS_INIT(siwg917_nwp_init, POST_KERNEL, CONFIG_SIWX91X_NWP_INIT_PRIORITY);
/* IRQn 74 is used for communication with co-processor */
Z_ISR_DECLARE(74, 0, IRQ074_Handler, 0);