Re: Getting a stable MAC address for a RPI CM3+ with ue0 interface

HI all,

> Am 21.09.2023 um 06:09 schrieb Mark Millard <[email protected]>:
> sysctl -b hw.fdt.dtb | dtc -I dtb -s > current_sorted.dts

Without the explicit "force_mac_address" line I find this in the output:

-----------------
        aliases {

                i2c_arm = "/soc/i2c@7e804000";
                i2c = "/soc/i2c@7e804000";
                i2c_vc = "/soc/i2c0mux/i2c@0";
                serial0 = "/soc/serial@7e201000";
                serial1 = "/soc/serial@7e215040";
                aux = "/soc/aux@7e215000";
                sound = "/soc/sound";
                soc = "/soc";
                dma = "/soc/dma@7e007000";
                intc = "/soc/interrupt-controller@7e00b200";
                watchdog = "/soc/watchdog@7e100000";
                random = "/soc/rng@7e104000";
                mailbox = "/soc/mailbox@7e00b880";
                gpio = "/soc/gpio@7e200000";
                uart0 = "/soc/serial@7e201000";
                uart1 = "/soc/serial@7e215040";
                sdhost = "/soc/mmc@7e202000";
                mmc = "/soc/mmc@7e300000";
                mmc1 = "/soc/mmc@7e300000";
                mmc0 = "/soc/mmc@7e202000";
                i2s = "/soc/i2s@7e203000";
                i2c0 = "/soc/i2c0mux/i2c@0";
                i2c1 = "/soc/i2c@7e804000";
                i2c10 = "/soc/i2c0mux/i2c@1";
                spi0 = "/soc/spi@7e204000";
                spi1 = "/soc/spi@7e215080";
                spi2 = "/soc/spi@7e2150c0";
                usb = "/soc/usb@7e980000";
                leds = "/leds";
                fb = "/soc/fb";
                thermal = "/soc/thermal@7e212000";
                axiperf = "/soc/axiperf";
                i2c2 = "/soc/i2c@7e805000";
        };
        chosen {

                fixup-applied;
                u-boot,version = "2023.07.02";
                user-warnings = [64 74 65 72 72 6f 72 3a 20 63 61 6e 27 74 20 66 69 6e 64 20 73 79 6d 62 6f 6c 20 27 75 61 72 74 30  5f 70 69 6e 73 27 0a 46 61 69 6c 65 64 20 74 6f 20 72 65 73 6f 6c 76 65 20 6f 76 65 72 6c 61 79 20 27 64 69 73 61 62 6c 65 2d 62 74  27 0a];
                rng-seed = <0x17f7438c 0x2ab979c8 0xc4352759 0x305da3e8 0x4304ea0a 0x6ce10bfb 0xa633ae6 0xcada5dfc 0x854eeecb 0x925b
1f20 0x12bdb423 0x1ebbf917 0x4b434ef3 0x21939e04 0x4ee3dcc7 0xe3f5af57>;
                kaslr-seed = <0x64f204d4 0x19ed2123>;
                os_prefix;
                overlay_prefix = [6f 76 65 72 6c 61 79 73 2f];
                rpi-boardrev-ext = <0x0>;
                log = <0x3ff80000 0x7ffe0>;
                bootargs = "coherent_pool=1M snd_bcm2835.enable_headphones=0 snd_bcm2835.enable_hdmi=1 bcm2708_fb.fbwidth=656 bcm2708_fb.fbheight=416 bcm2708_fb.fbswap=1 smsc95xx.macaddr=B8:27:EB:09:CB:7D vc_mem.mem_base=0x3ec00000 vc_mem.mem_size=0x40000000  force_mac_address=b8:27:eb:09:cb:7d";
                phandle = <0x2f>;
                bootloader {

                        boot-mode = <0x1>;
                        tryboot = <0x0>;
                        rsts = <0x1000>;
                        partition = <0x0>;
                };
        };
-----------------

The MAC address shown in the "bootargs" line is matching the serial number of the CM.

What now?

Kind regards,
Patrick