On Fri, 13 Aug 2021 at 03:40, Tao Ren <rentao.bupt@xxxxxxxxx> wrote: > > On Fri, Aug 13, 2021 at 01:29:17AM +0000, Joel Stanley wrote: > > On Thu, 5 Aug 2021 at 22:28, <rentao.bupt@xxxxxxxxx> wrote: > > > +&mdio1 { > > > + status = "okay"; > > > > You're enabling this but it looks like it's unused? > > Thanks Joel for the careful review. The MDIO controller is not paired > with BMC MAC; instead, it's connected to the MDC/MDIO interface of the > on-board switch (whose ports are connected to BMC, Host and front panel > management port). I see! > > In other word, the MDIO controller is used, but we do need some user > space scripts to control the controller. What's your suggestion? For > example, should I add some comments to explain the purpose? Yes, that would make sense. I've applied your patch, so if you want to add comments please send a diff against this tree: https://git.kernel.org/pub/scm/linux/kernel/git/joel/bmc.git/log/?h=dt-for-v5.15