freedom-k64f map and configure spi 0 driver

[trns1997]

Note: Please adhere to Contributing Guidelines.

Summary

This patch fixes a minor SPI transfer issue in the Kinetis DSPI driver when operating with the transmit and receive FIFOs disabled (MCR[DIS_TXF]=1, MCR[DIS_RXF]=1).

In non-FIFO mode, the DSPI module operates as a simplified double-buffered SPI interface without internal TX staging.

When FIFOs are disabled, PUSHR acts as a single 32-bit command/data block [PUSHR = [command bits | data bits]
]. Partial (16-bit) writes to its upper and lower halves are not guaranteed to combine coherently and can lead to incomplete or corrupted transfers. So the idea is to prepare the 32 bit packet and put with 1 function call instead of doing it in 2 steps, as done when FIFO is enabled.

References:

• 50.4.2.1 – Master mode
• 50.4.2.3 – FIFO disable operation
• 50.4.2.4 – Transmit FIFO buffering mechanism

This change resolves problematic SPI transactions observed with the LAN9252 EtherCAT slave [EasyCAT].

Impact

• Fixes broken transfers on Kinetis SPI when FIFOs are disabled.
• Improves compatibility with peripherals that require precise SPI framing (e.g., LAN9252, EasyCAT).
• No impact on existing DMA or FIFO-enabled configurations.

Testing

Testing was performed on a Kinetis K64F board connected to an EasyCAT (LAN9252-based) EtherCAT slave.

[acassis]

@trns1997 please fix the coding style issues and add message log in the commits explaining why this patch is necessary, basically to explain which problem are you fixing. Is it necessary to communicate with some SPI device?

[acassis]

@trns1997 please fix these errors:

nothing to commit, working tree clean
  Configuring...
  Disabling CONFIG_ARM_TOOLCHAIN_GNU_EABI
  Enabling CONFIG_ARM_TOOLCHAIN_GNU_EABI
  Building NuttX...
chip/kinetis_spi.c: In function 'kinetis_spibus_initialize':
Error: chip/kinetis_spi.c:1637:3: error: implicit declaration of function 'spi_run' [-Werror=implicit-function-declaration]
 1637 |   spi_run(priv, false);
      |   ^~~~~~~
Error: chip/kinetis_spi.c:1644:13: error: implicit declaration of function 'spi_getreg' [-Werror=implicit-function-declaration]
 1644 |   regval  = spi_getreg(priv, KINETIS_SPI_MCR_OFFSET);
      |             ^~~~~~~~~~
Error: chip/kinetis_spi.c:1646:3: error: implicit declaration of function 'spi_putreg' [-Werror=implicit-function-declaration]
 1646 |   spi_putreg(priv, KINETIS_SPI_MCR_OFFSET, regval);
      |   ^~~~~~~~~~
Error: chip/kinetis_spi.c:1674:24: error: invalid use of undefined type 'struct kinetis_spidev_s'
 1674 |   spi_putreg(priv, priv->ctarsel, 0);
      |                        ^~
Error: chip/kinetis_spi.c:1678:7: error: invalid use of undefined type 'struct kinetis_spidev_s'
 1678 |   priv->nbits = 0;
      |       ^~
Error: chip/kinetis_spi.c:1679:3: error: implicit declaration of function 'spi_setbits' [-Werror=implicit-function-declaration]
 1679 |   spi_setbits(&priv->spidev, 8);

...

nothing to commit, working tree clean
  Configuring...
  Disabling CONFIG_ARM_TOOLCHAIN_GNU_EABI
  Enabling CONFIG_ARM_TOOLCHAIN_GNU_EABI
  Building NuttX...
make[1]: *** No rule to make target '/github/workspace/sources/nuttx/arch/arm/src/chip/hardware/kinetis_memorymap.h', needed by 'arm_exception.o'.
make[1]: *** No rule to make target '/github/workspace/sources/nuttx/arch/arm/src/chip/hardware/kinetis_k28memorymap.h', needed by 'arm_exception.o'.
make[1]: *** No rule to make target '/github/workspace/sources/nuttx/include/arch/chip/kinetis_mcg.h', needed by 'arm_allocateheap.o'.
make[1]: Target 'libarch.a' not remade because of errors.
make: *** [tools/LibTargets.mk:170: arch/arm/src/libarch.a] Error 2
make: Target 'all' not remade because of errors.
/github/workspace/sources/nuttx/tools/testbuild.sh: line 385: /github/workspace/sources/nuttx/../nuttx/nuttx.manifest: No such file or directory
  [1/1] Normalize freedom-kl25z/nsh

[simbit18]

Hi @trns1997, I have added this PR #17307 for CMake build of NXP Kinetis MCUs. Could you please try it on your board?

[trns1997]

ping @leducp, this should help us complete the kickcat example :)