On 11/29/2011 10:20 AM, Timur Tabi wrote: > Timur Tabi wrote: > >> If I move the "fsl,eloplus-dma" into mpc85xx_common_ids[], then everything >> works. >> >> I suspect there's some kind of state machine in of_platform_bus_probe() that >> allows it to find the DMA channel nodes if it's scanned everything else >> first. I'm trying to debug it now.
Probably mpc85xx_common_ids[] can probe the soc node but not the dma node, and the p1022-specific list can probe the dma node but not the soc node, so it doesn't get to the dma node. > So why do we need mpc85xx_common_ids[] at all? Why can't > of_platform_bus_probe() just scan the entire tree? That would generate a lot of useless platform devices that are either not really devices, or duplicate a device sitting on another bus (i2c, pci, etc). It could also result in a device being probed and matching a driver, when the device is unavailable in a way that is more complicated than status = "disabled" (such as p1022 muxing), or otherwise requires special handling. -Scott _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
