On Friday 21 June 2013, Joel A Fernandes wrote: > Hi Arnd, > > On Fri, Jun 21, 2013 at 1:44 PM, Arnd Bergmann <arnd@xxxxxxxx> wrote: > > On Friday 21 June 2013, Joel A Fernandes wrote: > >> I think we are talking about different things, I agree the 'select > >> DMADEVICES' can be dropped but lets please keep the default y option > >> (not adding new select statements, just saying that if someone select > >> DMADEVICES in menuconfig and if they're ARCH_OMAP=1 , then default to > >> EDMA). This will simply allow people to have a default. Thanks. > > > > Yes, that's ok. > > Ok, thanks. I will follow up with a patch in my next submissions that builds it. > > Perhaps a: > default y if 'ARCH_OMAP2PLUS' > > and leave the existing as it is... > default n if 'ARCH_DAVINCI || ARCH_OMAP1 || ARCH_OMAP2' > > would make most sense to me. Basically EDMA is seen on current and all > new OMAP2PLUS. Ok > > config TI_EDMA > > tristate "TI EDMA support" > > default m if 'ARCH_DAVINCI || ARCH_OMAP1 || ARCH_OMAP2 > > select DMA_ENGINE > > select DMA_VIRTUAL_CHANNELS > > > MMC depends on EDMA specially on AM33xx there's no PIO mode AFAIK. The > 'm' option will require some initramfs to load the module when needing > to MMC boot, I suggest lets leave it as y. > Ah, right: you still export a filter function from the edma driver and use it in slave drivers: drivers/mmc/host/davinci_mmc.c: dma_request_slave_channel_compat(mask, edma_filter_fn, drivers/mmc/host/davinci_mmc.c: dma_request_slave_channel_compat(mask, edma_filter_fn, drivers/spi/spi-davinci.c: dspi->dma_rx = dma_request_channel(mask, edma_filter_fn, drivers/spi/spi-davinci.c: dspi->dma_tx = dma_request_channel(mask, edma_filter_fn, As long as this is the case, you have to be careful with the dependencies to make sure that davinci_mmc and spi-davinci either depend on TI_EDMA, or edma_filter_fn gets defined to NULL when you are building for a DT-only platform. Arnd -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
