Rob Herring <r...@kernel.org> [2019-05-01 15:19:25]: Hi Rob,
> > + struct property *pp; ... > > + pp = kzalloc(sizeof(*pp), GFP_KERNEL); > > + if (!pp) > > + return NULL; > > + > > + pp->name = "nvmem-mac-address"; > > + pp->length = ETH_ALEN; > > + pp->value = kmemdup(mac, ETH_ALEN, GFP_KERNEL); > > + if (!pp->value || of_add_property(np, pp)) > > + goto free; > > Why add this to the DT? I've just carried it over from v1 ("of_net: add mtd-mac-address support to of_get_mac_address()")[1] as nobody objected about this so far. Honestly I don't know if it's necessary to have it, but so far address, mac-address and local-mac-address properties provide this DT nodes, so I've simply thought, that it would be good to have it for MAC address from NVMEM as well in order to stay consistent. Just FYI, my testing ar9331_8dev_carambola2.dts[2] currently produces following runtime DT content: root@OpenWrt:/# find /sys/firmware/devicetree/ -name *nvmem* -o -name *addr@* /sys/firmware/devicetree/base/ahb/spi@1f000000/flash@0/partitions/partition@ff0000/nvmem-cells /sys/firmware/devicetree/base/ahb/spi@1f000000/flash@0/partitions/partition@ff0000/nvmem-cells/eth-mac-addr@0 /sys/firmware/devicetree/base/ahb/spi@1f000000/flash@0/partitions/partition@ff0000/nvmem-cells/eth-mac-addr@6 /sys/firmware/devicetree/base/ahb/spi@1f000000/flash@0/partitions/partition@ff0000/nvmem-cells/wifi-mac-addr@1002 /sys/firmware/devicetree/base/ahb/wmac@18100000/nvmem-cells /sys/firmware/devicetree/base/ahb/wmac@18100000/nvmem-mac-address /sys/firmware/devicetree/base/ahb/wmac@18100000/nvmem-cell-names /sys/firmware/devicetree/base/ahb/eth@1a000000/nvmem-cells /sys/firmware/devicetree/base/ahb/eth@1a000000/nvmem-mac-address /sys/firmware/devicetree/base/ahb/eth@1a000000/nvmem-cell-names /sys/firmware/devicetree/base/ahb/eth@19000000/nvmem-cells /sys/firmware/devicetree/base/ahb/eth@19000000/nvmem-mac-address /sys/firmware/devicetree/base/ahb/eth@19000000/nvmem-cell-names root@OpenWrt:/# hexdump -C /sys/firmware/devicetree/base/ahb/wmac@18100000/nvmem-mac-address 00000000 00 03 7f 11 52 da |....R.| 00000006 root@OpenWrt:/# ip addr show wlan0 4: wlan0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN qlen 1000 link/ether 00:03:7f:11:52:da brd ff:ff:ff:ff:ff:ff 1. https://patchwork.ozlabs.org/patch/1086628/ 2. https://git.openwrt.org/?p=openwrt/staging/ynezz.git;a=blob;f=target/linux/ath79/dts/ar9331_8dev_carambola2.dts;h=349c91e760ca5a56d65c587c949fed5fb6ea980e;hb=349c91e760ca5a56d65c587c949fed5fb6ea980e > You have the struct device ptr, so just use devm_kzalloc() if you need an > allocation. I'll address this in v3, thanks. -- ynezz