On Tue, 30 Jun 2020 17:05:33 +0100, Russell King wrote: > Update the Marvell Armada 38x COMPHY binding with an additional > optional register pair describing the location of an undocumented > system register controlling something to do with the Gigabit Ethernet > and COMPHY. There is one bit for each COMPHY lane that may be using > the serdes, but exactly what this register does is completely unknown. > > This register only appears to exist on Armada 38x devices, and not > other SoCs using the NETA ethernet block, so it seems logical that it > should be part of the COMPHY. > > This is also how u-boot groups this register; it is dealt with as part > of the COMPHY initialisation there. > > However, at the end of the day, due to the undocumented nature of this > register, we can only guess. > > Signed-off-by: Russell King <rmk+kernel@xxxxxxxxxxxxxxx> > --- > .../devicetree/bindings/phy/phy-armada38x-comphy.txt | 10 +++++++++- > 1 file changed, 9 insertions(+), 1 deletion(-) > Acked-by: Rob Herring <robh@xxxxxxxxxx>
