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drivers: spi: Kconfig.nrfx: Use RAM buffers for SPIMs by default

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Enable by default the use of RAM buffers in the spi_nrfx_spim.c
driver for copying TX data located in flash (as SPIM peripherals
cannot transfer directly form flash). Without this patch, users can
get confused, especially when SPI transaction is used by an upper
level driver which does not check all error codes.
For size of the buffer, use the value used so far in the reel_board
default configuration and in the SPI loopback test, i.e. 8 bytes.

Signed-off-by: Andrzej Głąbek <andrzej.glabek@nordicsemi.no>
This commit is contained in:
Andrzej Głąbek 2020-09-14 12:39:54 +02:00 • committed by Maureen Helm
commit b197fb0bbe
4 changed files with 1 additions and 7 deletions
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4
boards/arm/reel_board/Kconfig.defconfig
View file

@ -12,10 +12,6 @@ config BOARD
config I2C
default y
config SPI_NRFX_RAM_BUFFER_SIZE
default 8
depends on SPI
if USB
config USB_NRFX

2
drivers/spi/Kconfig.nrfx
View file

@ -191,7 +191,7 @@ config SPI_4_NRF_RX_DELAY
config SPI_NRFX_RAM_BUFFER_SIZE
int "Size of RAM buffers for SPIM peripherals"
default 0
default 8
depends on NRFX_SPIM
help
SPIM peripherals cannot transmit data directly from flash. Therefore,

1
tests/drivers/spi/spi_loopback/boards/nrf52840dk_nrf52840.conf
View file

@ -1,4 +1,3 @@
CONFIG_SPI_NRFX_RAM_BUFFER_SIZE=8
CONFIG_SPI_3_NRF_ORC=0x00
CONFIG_SPI_3_NRF_RX_DELAY=1

1
tests/drivers/spi/spi_loopback/boards/nrf9160dk_nrf9160.conf
View file

@ -1,4 +1,3 @@
CONFIG_SPI_NRFX_RAM_BUFFER_SIZE=8
CONFIG_SPI_3_NRF_ORC=0x00
CONFIG_SPI_LOOPBACK_DRV_NAME="SPI_3"