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7dbf782e5b
Add a shared NuttX SPI master lower-half for the Realtek Ameba SPI controllers (SPI0/SPI1) in arch/arm/src/common/ameba, driven through the SDK fwlib in polling mode with full-duplex exchange and a software chip select. Per-chip wiring (controller count, register bases, clock masks, crossbar pad-mux codes and the fwlib SSI_InitTypeDef layout) lives in arch/arm/src/rtl8721dx/ameba_spi_chip.h so a port to the other Ameba chips only supplies a same-named header. Each controller registers as /dev/spiN from pke8721daf bring-up through the stock SPI character driver; a dedicated `spi` defconfig drives the spitool for validation. Assisted-by: Claude <noreply@anthropic.com> Signed-off-by: dechao_gong <dechao_gong@realsil.com.cn> |
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