On Thu, Mar 14, 2013 at 05:40:53PM +0100, Anatolij Gustschin wrote: > Add SDHC DMA channel description to the mpc512x device > tree to enable slave channel requesting in the mxcmmc > driver. > > mpc512x DMA engine doesn't support endianness conversion > when reading/writing data from peripheral's FIFO, so we > have to swap data buffers before each DMA write and after > each DMA read transfer manually. > > Since chained SDHC DMA transfers are not supported on > mpc512x, limit 'max_segs' tunable parameter to one and > initialise it to 64 only when running on i.MX platforms. They are also not supported on the older i.MX platforms. Shouldn't this be handled in the DMA driver? Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
