Problems with DMA in the pxa2xx_spi driver

Hi All,

I have written a SPI protocol driver to connect a data acquisition chip to a character based interface to read and write the device. It works well in PIO mode and I am trying to get it to work with DMA.

To enable the DMA I am setting enable_dma in the pxa2xx_psi_chip struct and dma_burst_size to 16 in the pxa2xx_spi_chip structure under the board master file arch/arm/mach-pxa/xxxx.c.

Other than that I have not really changed anything. I had assumed since DMA code has been in the driver a while that DMA would just work. I must be missing some setup data I need.

Any help would be appreciated,

Johnnie


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