On Tue, Apr 29, 2014 at 6:31 AM, George Cherian <george.cherian@xxxxxx> wrote: > On 4/28/2014 9:47 PM, Yegor Yefremov wrote: >> >> On Mon, Apr 28, 2014 at 4:25 PM, George Cherian <george.cherian@xxxxxx> >> wrote: >>> >>> On 4/28/2014 2:07 PM, yegorslists@xxxxxxxxxxxxxx wrote: >>>> >>>> From: Yegor Yefremov <yegorslists@xxxxxxxxxxxxxx> >>>> >>>> This patch creates unique DMA channels for the second USB >>>> interface, otherwise the second USB interface is not usable >>>> at all. >>> >>> MUSB_DMA_NUM_CHANNELS is 15, so if you pass any dma-names > 15 (> >>> rx15/tx15), >>> the dma_controller_create in musb_core.c fails and it falls back to PIO >>> mode. >> >> What's the proper fix for the DMA issue? > > I could not understand what issue you are referring to. > In my setup I use both BBB and BBW (Beagle Bone Black/White)with one USB in > host (USB1) > and one USB in gadget (USB0). I dont see any issues with DMA. > > Can you be more specific? I've totally overlooked the DMA channel allocation errors (though usb0 in host mode was working, usb1 in OTG not). of_get_named_gpiod_flags: can't parse gpios property of node '/ocp/usb@47400000/usb-phy@47401300[0]' 47401300.usb-phy supply vcc not found, using dummy regulator musb-hdrc musb-hdrc.0.auto: Failed to request rx1. musb-hdrc musb-hdrc.0.auto: musb_init_controller failed with status -517 platform musb-hdrc.0.auto: Driver musb-hdrc requests probe deferral of_get_named_gpiod_flags: can't parse gpios property of node '/ocp/usb@47400000/usb-phy@47401b00[0]' 47401b00.usb-phy supply vcc not found, using dummy regulator musb-hdrc musb-hdrc.1.auto: Failed to request rx1. musb-hdrc musb-hdrc.1.auto: musb_init_controller failed with status -517 platform musb-hdrc.1.auto: Driver musb-hdrc requests probe deferral This patch fixes the issue: "ARM: dts: am33xx: Move the cppi41dma node so it's probed early" Thanks. Yegor -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
