On Wed, Dec 10, 2014 at 11:25:59AM -0600, atull wrote: > On Wed, 10 Dec 2014, Steffen Trumtrar wrote: > > > Hi! > > > > On Tue, Dec 09, 2014 at 02:14:46PM -0600, [email protected] wrote: > > > From: Alan Tull <[email protected]> > > > > > > Add Altera FGPA manager to device tree. > > > > > > Signed-off-by: Alan Tull <[email protected]> > > > --- > > > arch/arm/boot/dts/socfpga.dtsi | 10 ++++++++++ > > > 1 file changed, 10 insertions(+) > > > > > > diff --git a/arch/arm/boot/dts/socfpga.dtsi > > > b/arch/arm/boot/dts/socfpga.dtsi > > > index 4472fd9..bab98b6 100644 > > > --- a/arch/arm/boot/dts/socfpga.dtsi > > > +++ b/arch/arm/boot/dts/socfpga.dtsi > > > @@ -751,5 +751,15 @@ > > > compatible = "altr,sys-mgr", "syscon"; > > > reg = <0xffd08000 0x4000>; > > > }; > > > + > > > + hps_0_fpgamgr: fpgamgr@0xff706000 { > > > + compatible = "altr,fpga-mgr", "simple-bus"; > > > + reg = <0xFF706000 0x1000 > > > + 0xFFB90000 0x1000>; > > > + interrupts = <0 175 4>; > > > + #address-cells = <1>; > > > + #size-cells = <1>; > > > + ranges; > > > + }; > > > > The fpgamgr is NOT a bus. You don't need ranges and/or simple-bus. > > > > Regards, > > Steffen > > Actually, I am going to be using this when I add the DT notification > stuff. That stuff is waiting for DT overlays to show up in the main > tree. > > So the choice it to either change this file now, once, or do the minimal > changes and have to change it again later. >
Yes, that is what I thought. And still, devices can NOT show up at the fpgamgr. They show up on the various bridges. And as far as I understand the DT overlay stuff, you specify in the overlay what the parent node will be. For i2c this is one of the i2c-hosts, for spi one of the spi-hosts and for IP cores in a bitstream one of the bridges. The fpgamgr is, from my understanding, only responsible for writing the bitstream to the FPGA; nothing more. Regards, Steffen -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
