On Thursday, September 24, 2015 09:05:28 PM Vinod Koul wrote: > On Mon, Sep 14, 2015 at 05:37:36PM +0300, Mika Westerberg wrote: > > The current implementation hard codes the two supported channels so that > > "tx" is always 0 and "rx" is always 1. This is because there has been no > > suitable way in ACPI to name resources. > > > > With _DSD device properties we can finally do this: > > > > Device (SPI1) { > > Name (_CRS, ResourceTemplate () { > > ... > > FixedDMA (0x0000, 0x0000, Width32bit) > > FixedDMA (0x0001, 0x0001, Width32bit) > > }) > > > > Name (_DSD, Package () { > > ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"), > > Package () { > > Package () {"dma-names", Package () {"tx", "rx"}} > > }, > > }) > > } > > > > The names "tx" and "rx" now provide index of the FixedDMA resource in > > question. > > > > Modify acpi_dma_request_slave_chan_by_name() so that it looks for > > "dma-names" property first and only then fall back using hardcoded indices. > > > > The DT "dma-names" binding that we reuse for ACPI is documented in > > Documentation/devicetree/bindings/dma/dma.txt. > > Acked-by: Vinod Koul <vinod.koul@xxxxxxxxx> > > This is actually good and will help a lot. Thanks! Added [1/2] and this one to my device-properties branch. Thanks, Rafael -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html