Baikal-T1 SPI driver for DW SPI core
modulename: spi-dw-bt1.ko
configname: CONFIG_SPI_DW_BT1
Linux Kernel Configuration
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Device Drivers
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SPI support
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Baikal-T1 SPI driver for DW SPI core
In linux kernel since version 5.1
(release Date: 2019-05-05)
controllers. Two of them are pretty much normal: with IRQ, DMA,
FIFOs of 64 words depth, 4x CSs, but the third one as being a
part of the Baikal-T1 System Boot Controller has got a very
limited resources: no IRQ, no DMA, only a single native
chip-select and Tx/Rx FIFO with just 8 words depth available.
The later one is normally connected to an external SPI-nor flash
of 128Mb (in general can be of bigger size).