barebox environment raw partition on beaglebone black

[Lars Pedersen <lapeddk@gmail.com>]

Hi.

I'm trying to create a barebox environment by using af emmc a raw
partition offset on the beaglebone black.

For testing I appended the following into am33x-boneblack.dts.

/ {
    chosen {
        environment {
            compatible = "barebox,environment";
            device-path = &environment_emmc;
        };
    };

    aliases {
        state = &state_emmc;
    };

    state_emmc: state {
        #address-cells = <1>;
        #size-cells = <1>;
        compatible = "barebox,state";
        magic = <0x4b414d31>;
        backend-type = "raw";
        backend = <&backend_state_emmc>;
        backend-stridesize = <0x200>;

        bootstate {
            #address-cells = <1>;
            #size-cells = <1>;

            system0 {
                #address-cells = <1>;
                #size-cells = <1>;

                remaining_attempts@0 {
                    reg = <0x0 0x4>;
                    type = "uint32";
                    default = <10>;
                };

                priority@4 {
                    reg = <0x4 0x4>;
                    type = "uint32";
                    default = <21>;
                };
            };

            system1 {
                #address-cells = <1>;
                #size-cells = <1>;

                remaining_attempts@8 {
                    reg = <0x8 0x4>;
                    type = "uint32";
                    default = <0>;
                };

                priority@c {
                    reg = <0xc 0x4>;
                    type = "uint32";
                    default = <20>;
                };
            };

            last_chosen@10 {
                reg = <0x10 0x4>;
                type = "uint32";
            };
        };
    };
};

/* eMMC */
&mmc2 {
    partitions {
        compatible = "fixed-partitions";
        #address-cells = <1>;
        #size-cells = <1>;

        environment_emmc: partition@100000 {
            label = "barebox-environment";
            reg = <0x100000 0x100000>;
        };

        backend_state_emmc: partition@200000 {
            label = "barebox-state";
            reg = <0x200000 0x100000>;
        };
    };
};

Afterwards I get the following console output:

-------------------------------------------------
barebox 2024.01.0 #1 2024-01-01T00:00:00+00:00

Board: TI AM335x BeagleBone black
detected 'BeagleBone Black'
cpsw-mdio 4a101000.mdio@1000.of: detected phy mask 0x1
mdio_bus: miibus0: probed
eth0: got preset MAC address: 18:2c:65:2a:81:1d
i2c-omap 44e0b000.i2c@0.of: bus 0 rev0.11 at 400 kHz
i2c-omap 4819c000.i2c@0.of: bus 1 rev0.11 at 100 kHz
omap-hsmmc 48060000.mmc@0.of: registered as mmc0
omap-hsmmc 481d8000.mmc@0.of: registered as mmc1
mmc1: detected MMC card version 5.0
mmc1: registered mmc1
state: New state registered 'state'
state state.of: Fresh state detected, continuing with defaults
omap_wdt 44e35000.wdt@0.of: OMAP Watchdog Timer Rev 0x01
netconsole: registered as netconsole-1
malloc space: 0x8fefe3c0 -> 0x9fdfc77f (size 255 MiB)
am335x-phy-driver 47401b00.usb-phy@1b00.of: am_usbphy 8fff21a4 enabled
am335x-phy-driver 47401300.usb-phy@1300.of: am_usbphy 8fff225c enabled
musb-hdrc: ConfigData=0xde (UTMI-8, dyn FIFOs, bulk combine, bulk
split, HB-ISO Rx, HB-ISO Tx, SoftConn)
musb-hdrc: MHDRC RTL version 2.0
musb-hdrc: setup fifo_mode 4
musb-hdrc: 28/31 max ep, 16384/16384 memory
musb-hdrc: ConfigData=0xde (UTMI-8, dyn FIFOs, bulk combine, bulk
split, HB-ISO Rx, HB-ISO Tx, SoftConn)
musb-hdrc: MHDRC RTL version 2.0
musb-hdrc: setup fifo_mode 4
musb-hdrc: 28/31 max ep, 16384/16384 memory
environment load /mnt/mmc1.0/barebox.env: No such file or directory
Maybe you have to create the partition.
changing USB current limit to 1300 mA... done

Hit m for menu or any to stop autoboot:    1
---------------------------------------------------

Why does it try to read the env on a partition on
/mnt/mmc1.0/barebox.env? Is it because barebox.bin also is read from
this partition?

Thanks.

/Lars