On Sun, Apr 03, 2016 at 12:09:33PM -0400, Tom Rini wrote:
Add a node for the Synopsys Designware Ethernet adapter available on Meson SoCs to the Meson GXBaby DTS files. The node is not present in DTS files used in Linux kernel.
... but why is this not yet in the kernel device tree? Has it just not made it up from the SoC tree?
Because kernel doesn't have yet an Ethernet driver for Meson GXBaby to set the platform-specific registers needed to program the MII mode, clocks and other things (the settings that are in patch 9/9 of this submission). And without documentation it's hard to write one and get it right.
So this patch adds a new uboot-only node to the DTS for Ethernet. This doesn't seem problematic to me WRT synchronization with kernel DTS because no new bindings or driver changes are needed; and whenever the same node will be added to kernel we'll only have to update it in u-boot.
If it is not acceptable to have a DTS different to kernel one, I'll have to find a different solution, any suggestions? Should I use U_BOOT_DEVICE and platform_data inside the board file instead?
Maybe I will submit v3 of the series without Ethernet while I figure out this.
Beniamino