I am using PPC440EPx SPI driver to access devices with different clock polarities (SPI_MODE_0 and SPI_MODE_2), but otherwise similar SPI parameters (max clock frequency, bits per word, etc.) If spidev is used to modify clock polarity via ioctl SPI_IOC_WR_MODE, it does not have any effect on the controller.
This list has dicussed a related issue: http://ozlabs.org/pipermail/linuxppc-dev/2009-January/066749.html that explains why SPI_IOC_WR_MODE does not work, function spi_ppc4xx_setupxfer() is called only once by spi_ppc4xx_setup() function. Any subsequent call just ignores request to change SPI configuration and does not report any error. Is this how the driver is supposed to work? Can the above usage be acommodated into the driver? Thanks, Luis _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
