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drivers: dma: stm32 dmamux device must be initialized after dma

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Add specific init priority for the stm32 DMAMUX device higher
than the CONFIG_DMA_INIT_PRIORITY, to be sure that the DMAMUX
 initialization always comes after the stm32 DMA device init.
Its default value is set to 41 when the DMA_INIT_PRIORITY is
KERNEL_INIT_PRIORITY_DEFAULT (=40).

Signed-off-by: Francois Ramu <francois.ramu@st.com>
This commit is contained in:
Francois Ramu 2023-06-22 11:38:10 +02:00 committed by Carles Cufí
parent 192e425b90
commit a5532f9fd9
2 changed files with 15 additions and 1 deletions
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8
drivers/dma/Kconfig.stm32
View file

@ -67,4 +67,12 @@ config DMA_STM32_BDMA
help
BDMA driver for STM32H7 series SoCs.
config DMAMUX_STM32_INIT_PRIORITY
int "STM32 DMAMUX init priority"
depends on DT_HAS_ST_STM32_DMAMUX_ENABLED
default 41
help
DMAMUX driver device must be init'd after the DMA (CONFIG_DMA_INIT_PRIORITY)
DMAMUX driver device initialization priority is greater than DMA one's
endif # DMA_STM32

8
drivers/dma/dmamux_stm32.c
View file

@ -422,7 +422,13 @@ DEVICE_DT_INST_DEFINE(index, \
&dmamux_stm32_init, \
NULL, \
&dmamux_stm32_data_##index, &dmamux_stm32_config_##index,\
PRE_KERNEL_1, CONFIG_DMA_INIT_PRIORITY, \
PRE_KERNEL_1, CONFIG_DMAMUX_STM32_INIT_PRIORITY, \
&dma_funcs);
DT_INST_FOREACH_STATUS_OKAY(DMAMUX_INIT)
/*
* Make sure that this driver is initialized after the DMA driver (higher priority)
*/
BUILD_ASSERT(CONFIG_DMAMUX_STM32_INIT_PRIORITY >= CONFIG_DMA_INIT_PRIORITY,
"CONFIG_DMAMUX_STM32_INIT_PRIORITY must be higher than CONFIG_DMA_INIT_PRIORITY");