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drivers/spi/Kconfig and include/nuttx/spi/spi.h: Extend the HW features supported by SPI. It now supports a deffered DMA trigger hardware configuration. arch/arm/src/stm32/stm32_spi.c: Implements the new deferred DMA trigger feature.

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This commit is contained in:
Dave Marples
2018-12-02 07:30:17 -06:00
committed by Gregory Nutt
parent d2b98cc150
commit 8328539534
3 changed files with 137 additions and 4 deletions
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drivers/spi/Kconfig
+11
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@@ -114,6 +114,17 @@ config SPI_CS_DELAY_CONTROL
This option enables the setdelay() interface method.
config SPI_TRIGGER
bool "SPI DMA trigger"
default n
select SPI_HWFEATURES
depends on SPI_EXCHANGE
---help---
Some architectures benefit from delaying the start of DMA from the
DMA setup. If this option is selected, then an SPI_TRIGGER() method
is supported: The DMA is setup with in in SPI_EXCHANGE() but does
not actually begin until SPI_TRIGGER() is called.
config SPI_DRIVER
bool "SPI character driver"
default n