On Fri, Dec 11, 2015 at 11:34:53AM +0100, Gregory CLEMENT wrote: > With device tree it is no more possible to reset the PHY at board > level. Furthermore, doing in the driver allow to power down the PHY when > the network interface is no more used. > > This reset can't be done at the PHY driver level. The PHY must be able to > answer the to the mii bus scan to let the kernel creating a PHY device. > > The patch introduces a new optional property "phy-reset-gpios" inspired > from the one use for the FEC. > > Signed-off-by: Gregory CLEMENT <gregory.clem...@free-electrons.com> > --- > > Since the v1, I used the gpiod functions. It allows to simplify the > code and to not introduce any #ifdef. > > I also rename the property in phy-reset-gpios, even if actually the > gpiod will match both phy-reset-gpios and phy-reset-gpio. > > > Documentation/devicetree/bindings/net/macb.txt | 3 +++ > drivers/net/ethernet/cadence/macb.c | 8 ++++++++ > drivers/net/ethernet/cadence/macb.h | 1 + > 3 files changed, 12 insertions(+) > > diff --git a/Documentation/devicetree/bindings/net/macb.txt > b/Documentation/devicetree/bindings/net/macb.txt > index b5d7976..4a7fb6c 100644 > --- a/Documentation/devicetree/bindings/net/macb.txt > +++ b/Documentation/devicetree/bindings/net/macb.txt > @@ -19,6 +19,9 @@ Required properties: > Optional elements: 'tx_clk' > - clocks: Phandles to input clocks. > > +Optional properties: > +- phy-reset-gpios : Should specify the gpio for phy reset > +
This alone is simple enough, but I worry that this doesn't really scale. What if you need to enable clocks or regulators for the same reason? The mmc folks did a pwrseq binding for similar reasons. I don't think I'd recommend that here as I think it is kind of ugly. We really need a pre-probe/scan hook for drivers. This is also needed for USB devices mounted on boards. But I'm not going to hold up something simple to do all that, so: Acked-by: Rob Herring <r...@kernel.org> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
