On Thu, Jan 5, 2017 at 10:48 AM, Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> wrote: > Hello, > > On Thursday 05 Jan 2017 08:39:29 Tony Lindgren wrote: >> * Rob Herring <robh@xxxxxxxxxx> [170105 08:28]: >> > On Fri, Dec 2, 2016 at 3:11 PM, Laurent Pinchart wrote: >> >> The Beagleboard-xM has a LAN9514 USB hub and ethernet controller, >> >> connected to port 2 of the OMAP EHCI controller. The board however has >> >> no EEPROM to store the ethernet MAC address, which is programmed by the >> >> boot loader. >> >> >> >> To allow Linux to use the same MAC address as the boot loader (or for >> >> that matter any fixed MAC address), we need a node in the device tree >> >> for the ethernet controller that the boot loader can update at runtime >> >> with a local-mac-address property. Add it, along with an alias for the >> >> ethernet controller to let the boot loader locate it easily. >> >> >> >> Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> >> >> --- >> >> Changes since v1: >> >> >> >> - Renamed usb2 DT node to hub >> >> --- >> >> >> >> arch/arm/boot/dts/omap3-beagle-xm.dts | 16 ++++++++++++++++ >> >> 1 file changed, 16 insertions(+) >> >> >> >> diff --git a/arch/arm/boot/dts/omap3-beagle-xm.dts >> >> b/arch/arm/boot/dts/omap3-beagle-xm.dts index >> >> 85e297ed0ea1..673cee2234b2 100644 >> >> --- a/arch/arm/boot/dts/omap3-beagle-xm.dts >> >> +++ b/arch/arm/boot/dts/omap3-beagle-xm.dts >> >> @@ -27,6 +27,7 @@ >> >> aliases { >> >> display0 = &dvi0; >> >> display1 = &tv0; >> >> + ethernet = ðernet; >> > >> > Sorry, just noticed this, but this should be dropped. It's not used >> > nor do we want an alias here. >> >> OK, will update locally as I have not pushed out yet. > > The ethernet alias is used by U-Boot to locate the ethernet controller and > update the MAC address. Okay. Though with only only one, I don't see why that is hard to find. Anyway, this is the least of u-boot's DT abuses. >> > P.S. The display ones are questionable, too. Only OMAP has them and >> > per platform alias names is not something we want. >> >> OK. What about the mmc ones? Otherwise the MMC devices keep moving >> around depending on the kernel version.. This is a solved problem. Consistent dev numbering is not a feature of the kernel and MMC is not special. Rob -- 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