Messages in this thread | | | Subject | Re: [PATCH 2/3] fpga bus driver | From | Pantelis Antoniou <> | Date | Tue, 5 Aug 2014 21:21:46 +0300 |
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Hi Alan,
On Aug 2, 2014, at 1:28 AM, <atull@opensource.altera.com> wrote:
> From: Alan Tull <atull@opensource.altera.com> > > 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
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