Hi Florian, Andrew, > Le 02/04/17 à 09:23, Andrew Lunn a écrit : > > On Sat, Feb 04, 2017 at 04:47:47PM +0100, Lukasz Majewski wrote: > >> Add the documentation to avoid PHY lane swapping. This is a boolean > >> entry to notify the phy device drivers that the TX/RX lanes NO need > > > > that the TX/RX lanes should not be swapped. > > > >> to be swapped. > >> The use case for this binding mostly happens after wrong HW > >> configuration of PHY IC during bootstrap. > >> > >> Signed-off-by: Lukasz Majewski <lukma@xxxxxxx> > >> --- > >> Documentation/devicetree/bindings/net/phy.txt | 4 ++++ > >> 1 file changed, 4 insertions(+) > >> > >> diff --git a/Documentation/devicetree/bindings/net/phy.txt > >> b/Documentation/devicetree/bindings/net/phy.txt index > >> fb5056b..5e25bc9 100644 --- > >> a/Documentation/devicetree/bindings/net/phy.txt +++ > >> b/Documentation/devicetree/bindings/net/phy.txt @@ -39,6 +39,10 @@ > >> Optional Properties: > >> - enet-phy-lane-swap: If set, indicates the PHY will swap the > >> TX/RX lanes to compensate for the board being designed with the > >> lanes swapped. > >> +- enet-phy-lane-no-swap: If set, indicates that PHY will disable > >> swap of the > >> + TX/RX lanes. This binding allows the PHY to work correcly after > >> e.g. wrong > >> + bootstrap configuration caused by issues in PCB layout design. > > s/binding/property/ > > >> + > > > > We are leaving it undefined what it means if neither > > enet-phy-lane-no-swap nor enet-phy-lane-swap properties are present. > > Do we want to define this? That the swap should be left untouched by > > the driver? > > Since this is a description of the hardware, absence of a properties > should mean that the driver is at freedom to either keep the hardware > defaults, or come up with its own settings that are sensible for that > particular PHY device. > > What would you see clarified here? Any more comments to this patch? Is the explanation informative enough? Best regards, Lukasz Majewski -- DENX Software Engineering GmbH, Managing Director: Wolfgang Denk HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@xxxxxxx -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
