Hi Alan, On Aug 2, 2014, at 1:28 AM, <atull@xxxxxxxxxxxxxxxxxxxxx> wrote: > From: Alan Tull <atull@xxxxxxxxxxxxxxxxxxxxx> > > This driver allows programming the fpga from > device tree overlays. > > This code is dependent on Pantelis Antoniou's current > work on Device Tree overlays, a method of dynamically > altering the kerel's live Device Tree. This patchset > was tested with Pantelis's and Grant Likely's stuff > that is in git plus some dtc fixups for compiling > overlays. > > Resume is handled by re-requesting the firmware and > reprogramming the FPGA. > > Here's a simple example. Start with: > * the altera-gpio driver built in to the kernel but not in the > device tree. > * raw fpga image at /lib/firmware/soc_system.rbf > * Load appropriate device tree overlay in configfs by doing > $ mkdir /config/device-tree/overlays/1 > $ echo socfpga_overlay.dtbo > /config/device-tree/overlays/1/path FWIW, there's now an updated configfs interface. You can just # cp socfpga_overlay.dtbo /config/device-tree/overlays/1/dtbo That's namespace safe, if you care about those things. Regards -- Pantelis -- 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
