How to add custom dts entries

[Bernd Walter]

On Sat, Nov 03, 2018 at 09:54:55PM +0100, Bernd Walter wrote:
> On Sat, Nov 03, 2018 at 02:46:30PM -0600, Ian Lepore wrote:
> > We do have overlay support now. I don't know much about using it,
> > hopefully those who do will reply with details.
> 
> That's good to know.
> Hope for an answer too ;-)
> 
> > There have also been updates to the SPI world. Your apa102led0 fdt node
> > now requires a "spi-max-frequency" property, the value is the bus speed
> > to use when communicating with that device, in Hz (different devices on
> > the same bus can now have different speeds, and there is no concept of
> > a default speed). Also, the chipsel number should be in a reg=
> > property, but we still support spi-chipselect= too for backwards
> > compatibility. 
> 
> Ah, important information.
> I had been using dev.spi.0.clock to increase speed.
> Obviously dev.spi doesn't even exists anymore.
> Have to check about the CS, technically it is a dummy value anyway,
> since the APA102 LEDs don't have a chip select and are the only
> device connected to the SPI.

I see, there is some overlay setup done for spigen(4).
Didn't know we have userland spi support already.
Nice addition.
However, the DS18B20/ow_temp(4) still needs the onewire setup.

-- 
B.Walter <bernd at bwct.de> http://www.bwct.de
Modbus/TCP Ethernet I/O Baugruppen, ARM basierte FreeBSD Rechner uvm.