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如何在am335x uboot中使能MMC2挂载SD卡

user4729174
Intellectual 480 points
Other Parts Discussed in Thread: TPS65217

由于硬件设计把MMC0接了wifi，USB0没有引出，引出MMC2接了SD卡，当时硬件考虑可以通过Jlink烧写文件系统，导致了现在的麻烦。


我的思路是先从串口启动加载uboot，uboot中初始化MMC2来挂载SD卡上的文件系统，不知到有没有高手做过相应的改动，我需要初始化MMC2并挂载SD卡

  • 0
    TI__Mastermind 45260 points

    你的Linux内核放在哪里？也是SD卡上么？

  • 0 回复 Jian Zhou
    Intellectual 480 points

    内核从串口加载

  • 0 回复 user4729174
    TI__Mastermind 45260 points

    内核比较大，不建议从串口加载，最好放在SD卡上。

  • 0 回复 Jian Zhou
    Intellectual 480 points

    这个没什么问题，之前用开发板，内核损坏了，也是从串口把内核加载上去的，系统启动完成再更新内核文件

  • 0 回复 Jian Zhou
    Intellectual 480 points

    目的就是烧写emmc

  • 0
    TI__Mastermind 25020 points

    印象中，我们的各个版本的SDK中都没有做MMC2的driver初始化，所以要先做这块的初始化操作工作。使能pinmux，使能相关的module。

    具体的操作没做过，因为目前没有什么EVM板这么接过，所以没啥平台可以实际操作的。

    你目前是基于哪个Linux SDK版本做的？有做过初始化的操作，然后fail了吗？有没有相关操作的log？

  • 0 回复 Steven Liu1
    Intellectual 480 points

    uboot版本：2015.07

    在board/ti/am335x/mux.c中增加

    static struct module_pin_mux mmc2_pin_mux[] = {
        {OFFSET(gpmc_ad15), (MODE(3) | RXACTIVE | PULLUP_EN)},    /* MMC2_DAT3 */
        {OFFSET(gpmc_ad14), (MODE(3) | RXACTIVE | PULLUP_EN)},    /* MMC2_DAT2 */
        {OFFSET(gpmc_ad13), (MODE(3) | RXACTIVE | PULLUP_EN)},    /* MMC2_DAT1 */
        {OFFSET(gpmc_ad12), (MODE(3) | RXACTIVE | PULLUP_EN)},    /* MMC2_DAT0 */
        {OFFSET(gpmc_clk), (MODE(3) | RXACTIVE | PULLUP_EN)},    /* MMC2_CLK */
        {OFFSET(gpmc_csn3), (MODE(3) | RXACTIVE | PULLUP_EN)},    /* MMC2_CMD */
        {OFFSET(gpmc_wpn), (MODE(4) | RXACTIVE | PULLUP_EN)},    /* MMC2_CD */
        {-1},
    };

    相同文件下void enable_board_pin_mux(void)
    函数增加configure_module_pin_mux(mmc2_pin_mux);

    在arch/arm/include/asm/arch-am335x/mmc_host_def.h增加#define OMAP_HSMMC3_BASE 0x47810100

    U-Boot# md.w 0x47810100
    47810100: 0000 0000 0000 0000 0000 0000 0000 0000    ................
    47810110: 2015 0000 0001 0000 0000 0000 0000 0000    . ..............
    47810120: 0000 0000 0000 0000 0000 0000 0600 0000    ................
    47810130: 0000 0000 0000 0000 0000 0000 0000 0000    ................
    47810140: 0000 0000 0000 0000 0000 0000 0000 0000    ................
    47810150: 0000 0000 0000 0000 0000 0000 0000 0000    ................
    47810160: 0000 0000 0000 0000 0000 0000 0000 0000    ................
    47810170: 0000 0000 0000 0000 0000 0000 0000 0000    ................
    U-Boot# mmc list
    OMAP SD/MMC: 0
    OMAP SD/MMC: 1 (eMMC)

  • 0 回复 Steven Liu1
    Intellectual 480 points

    U-Boot# boot
    MMC Device 2 not found
    no mmc device at slot 2
    SD/MMC found on device 2
    MMC Device 2 not found
    no mmc device at slot 2
    SD/MMC found on device 2
    MMC Device 2 not found
    ** Bad device mmc 2 **
    MMC Device 2 not found
    ** Bad device mmc 2 **
    ** No partition table - mmc 1 **
    switch to partitions #0, OK
    mmc1(part 0) is current device
    SD/MMC found on device 1
    switch to partitions #0, OK
    mmc1(part 0) is current device
    SD/MMC found on device 1
    Failed to mount ext2 filesystem...
    ** Unrecognized filesystem type **
    ** Unrecognized filesystem type **
    ** No partition table - mmc 1 **
    Booting from nand ...

    no devices available

    no devices available
    Bad Linux ARM zImage magic!

  • 0 回复 user4729174
    TI__Mastermind 45260 points

    怎么感觉是把MMC2识别成MMC0了

  • 0 回复 Jian Zhou
    Intellectual 480 points

    不是的 并没有挂载上去，查询这个设备号是没有设备的，是不是mmc限制只有两个挂载点

  • 0 回复 user4729174
    TI__Mastermind 45260 points

    你用的是哪个版本的u-boot，需要看下configure文件。

  • 0 回复 Jian Zhou
    Intellectual 480 points

    如果成功挂载会显示（SD）的

  • 0 回复 Jian Zhou
    Intellectual 480 points

    这个文件在哪里

  • 0 回复 Jian Zhou
    Intellectual 480 points

    U-Boot# mmc list
    OMAP SD/MMC: 0
    OMAP SD/MMC: 1 (SD)
    OMAP SD/MMC: 2 (eMMC)
    U-Boot# fatls mmc 1
                system volume information/

    0 file(s), 1 dir(s)

    U-Boot# fatload mmc 1 0x82000000 zImage
    reading zImage
    ** Unable to read file zImage **
    U-Boot# fatload mmc 0 0x82000000 zImage
    ** Bad device mmc 0 **
    U-Boot# fatload mmc 2 0x82000000 zImage
    ** Unrecognized filesystem type **
    U-Boot# fatload mmc 1 0x82000000 zImage
    reading zImage
    ** Unable to read file zImage **
    U-Boot# mmc list
    OMAP SD/MMC: 0
    OMAP SD/MMC: 1 (SD)
    OMAP SD/MMC: 2 (eMMC)

    识别出来SD卡了，但是好像还识别不了文件系统

  • 0 回复 user4729174
    Intellectual 480 points

    楼上是我搞错SD卡了，插入正确的SD卡后可以启动，


    从串口加载uboot，然后启动内核，系统启动到一半卡住了，是不是接口重新初始化了还是什么问题

    Starting xmodem transfer.  Press Ctrl+C to cancel.
    Transferring u-boot-spl.bin...
      100%      64 KB      10 KB/sec    00:00:06       0 Errors  


    U-Boot SPL 2015.07 (Dec 17 2016 - 15:04:58)
    i2c_read: error waiting for addr ACK (status=0x106)
    i2c_read: error waiting for addr ACK (status=0x106)
    C
    Transferring u-boot.img, errors 1...l+C to cancel.
      100%     365 KB       5 KB/sec    00:01:10       2 Errors  

    Loaded 373788 bytes


    U-Boot 2015.07 (Dec 17 2016 - 15:04:58 +0800)

           Watchdog enabled
    I2C:   ready
    DRAM:  512 MiB
    NAND:  0 MiB
    MMC:   OMAP SD/MMC: 0, OMAP SD/MMC: 1, OMAP SD/MMC: 2
    ** Bad device mmc 0 **
    Using default environment

    Net:   <ethaddr> not set. Validating first E-fuse MAC
    Phy 4 not found
    cpsw, usb_ether
    Hit any key to stop autoboot:  0
    Card did not respond to voltage select!
    switch to partitions #0, OK
    mmc1 is current device
    SD/MMC found on device 1
    switch to partitions #0, OK
    mmc1 is current device
    SD/MMC found on device 1
    reading boot.scr
    ** Unable to read file boot.scr **
    reading uEnv.txt
    ** Unable to read file uEnv.txt **
    reading zImage
    4005584 bytes read in 503 ms (7.6 MiB/s)
    reading am335x-evm.dtb
    34052 bytes read in 13 ms (2.5 MiB/s)
    Kernel image @ 0x82000000 [ 0x000000 - 0x3d1ed0 ]
    ## Flattened Device Tree blob at 88000000
       Booting using the fdt blob at 0x88000000
       Loading Device Tree to 8fff4000, end 8ffff503 ... OK

    Starting kernel ...

    [    0.000000] Booting Linux on physical CPU 0x0
    [    0.000000] Initializing cgroup subsys cpu
    [    0.000000] Initializing cgroup subsys cpuacct
    [    0.000000] Linux version 4.1.18 (root@pc) (gcc version 4.9.3 20150413 (prerelease) (Linaro GCC 4.9-2015.05) ) #45 PREEMPT Fri Dec 16 12:13:32 CST 2016
    [    0.000000] CPU: ARMv7 Processor [413fc082] revision 2 (ARMv7), cr=10c5387d
    [    0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
    [    0.000000] Machine model: TI AM335x EVM
    [    0.000000] cma: Reserved 24 MiB at 0x9e800000
    [    0.000000] Memory policy: Data cache writeback
    [    0.000000] CPU: All CPU(s) started in SVC mode.
    [    0.000000] AM335X ES2.1 (sgx neon )
    [    0.000000] Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 129920
    [    0.000000] Kernel command line: console=ttyO0,115200n8 root=PARTUUID=ccd4ebea-02 rw rootfstype=ext4 rootwait
    [    0.000000] PID hash table entries: 2048 (order: 1, 8192 bytes)
    [    0.000000] Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
    [    0.000000] Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
    [    0.000000] Memory: 483148K/524288K available (7747K kernel code, 325K rwdata, 2672K rodata, 280K init, 244K bss, 16564K reserved, 24576K cma-reserved, 0K highmem)
    [    0.000000] Virtual kernel memory layout:
    [    0.000000]     vector  : 0xffff0000 - 0xffff1000   (   4 kB)
    [    0.000000]     fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
    [    0.000000]     vmalloc : 0xe0800000 - 0xff000000   ( 488 MB)
    [    0.000000]     lowmem  : 0xc0000000 - 0xe0000000   ( 512 MB)
    [    0.000000]     pkmap   : 0xbfe00000 - 0xc0000000   (   2 MB)
    [    0.000000]     modules : 0xbf000000 - 0xbfe00000   (  14 MB)
    [    0.000000]       .text : 0xc0008000 - 0xc0a3505c   (10421 kB)
    [    0.000000]       .init : 0xc0a36000 - 0xc0a7c000   ( 280 kB)
    [    0.000000]       .data : 0xc0a7c000 - 0xc0acd4c8   ( 326 kB)
    [    0.000000]        .bss : 0xc0ad0000 - 0xc0b0d058   ( 245 kB)
    [    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
    [    0.000000] Preemptible hierarchical RCU implementation.
    [    0.000000]  Additional per-CPU info printed with stalls.
    [    0.000000] NR_IRQS:16 nr_irqs:16 16
    [    0.000000] IRQ: Found an INTC at 0xfa200000 (revision 5.0) with 128 interrupts
    [    0.000000] OMAP clockevent source: timer2 at 25000000 Hz
    [    0.000033] sched_clock: 32 bits at 25MHz, resolution 40ns, wraps every 85899345900ns
    [    0.000079] clocksource timer1: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 76450417870 ns
    [    0.000106] OMAP clocksource: timer1 at 25000000 Hz
    [    0.000482] Console: colour dummy device 80x30
    [    0.000534] WARNING: Your 'console=ttyO0' has been replaced by 'ttyS0'
    [    0.000550] This ensures that you still see kernel messages. Please
    [    0.000566] update your kernel commandline.
    [    0.000604] Calibrating delay loop... 298.59 BogoMIPS (lpj=1492992)
    [    0.067750] pid_max: default: 32768 minimum: 301
    [    0.068006] Security Framework initialized
    [    0.068123] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
    [    0.068152] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
    [    0.069666] Initializing cgroup subsys blkio
    [    0.069723] Initializing cgroup subsys memory
    [    0.069818] Initializing cgroup subsys devices
    [    0.069858] Initializing cgroup subsys freezer
    [    0.069895] Initializing cgroup subsys perf_event
    [    0.069960] CPU: Testing write buffer coherency: ok
    [    0.070729] Setting up static identity map for 0x80008200 - 0x80008270
    [    0.074208] devtmpfs: initialized
    [    0.101836] VFP support v0.3: implementor 41 architecture 3 part 30 variant c rev 3
    [    0.134873] omap_hwmod: debugss: _wait_target_disable failed
    [    0.204818] clocksource jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
    [    0.209671] pinctrl core: initialized pinctrl subsystem
    [    0.212607] NET: Registered protocol family 16
    [    0.218428] DMA: preallocated 256 KiB pool for atomic coherent allocations
    [    0.247836] cpuidle: using governor ladder
    [    0.277814] cpuidle: using governor menu
    [    0.289022] OMAP GPIO hardware version 0.1
    [    0.313548] No ATAGs?
    [    0.313619] hw-breakpoint: debug architecture 0x4 unsupported.
    [    0.393080] edma 49000000.edma: TI EDMA DMA engine driver
    [    0.401503] vgaarb: loaded
    [    0.402735] SCSI subsystem initialized
    [    0.403536] usbcore: registered new interface driver usbfs
    [    0.403736] usbcore: registered new interface driver hub
    [    0.403978] usbcore: registered new device driver usb
    [    0.405346] omap_i2c 44e0b000.i2c: could not find pctldev for node /ocp/l4_wkup@44c00000/scm@210000/pinmux@800/pinmux_i2c0_pins, deferring probe
    [    0.405662] media: Linux media interface: v0.10
    [    0.405848] Linux video capture interface: v2.00
    [    0.405982] pps_core: LinuxPPS API ver. 1 registered
    [    0.406004] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
    [    0.406091] PTP clock support registered
    [    0.408273] omap-mailbox 480c8000.mailbox: omap mailbox rev 0x400
    [    0.408775] Advanced Linux Sound Architecture Driver Initialized.
    [    0.412763] Switched to clocksource timer1
    [    0.440571] NET: Registered protocol family 2
    [    0.442485] TCP established hash table entries: 4096 (order: 2, 16384 bytes)
    [    0.442624] TCP bind hash table entries: 4096 (order: 2, 16384 bytes)
    [    0.442903] TCP: Hash tables configured (established 4096 bind 4096)
    [    0.443094] UDP hash table entries: 256 (order: 0, 4096 bytes)
    [    0.443148] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
    [    0.443534] NET: Registered protocol family 1
    [    0.444327] RPC: Registered named UNIX socket transport module.
    [    0.444361] RPC: Registered udp transport module.
    [    0.444378] RPC: Registered tcp transport module.
    [    0.444396] RPC: Registered tcp NFSv4.1 backchannel transport module.
    [    0.446376] CPU PMU: Failed to parse /pmu/interrupt-affinity[0]
    [    0.446488] hw perfevents: enabled with armv7_cortex_a8 PMU driver, 5 counters available
    [    0.451276] futex hash table entries: 256 (order: -1, 3072 bytes)
    [    0.451501] audit: initializing netlink subsys (disabled)
    [    0.451631] audit: type=2000 audit(0.440:1): initialized
    [    0.471443] VFS: Disk quotas dquot_6.6.0
    [    0.471978] VFS: Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
    [    0.478140] NFS: Registering the id_resolver key type
    [    0.478289] Key type id_resolver registered
    [    0.478313] Key type id_legacy registered
    [    0.478498] jffs2: version 2.2. (NAND) (SUMMARY)  漏 2001-2006 Red Hat, Inc.
    [    0.485657] NET: Registered protocol family 38
    [    0.485823] io scheduler noop registered
    [    0.485856] io scheduler deadline registered
    [    0.485992] io scheduler cfq registered (default)
    [    0.488403] pinctrl-single 44e10800.pinmux: 142 pins at pa f9e10800 size 568
    [    0.494539] wkup_m3_ipc 44e11324.wkup_m3_ipc: could not get rproc handle
    [    0.496934] Serial: 8250/16550 driver, 10 ports, IRQ sharing enabled
    [    0.506255] 44e09000.serial: ttyS0 at MMIO 0x44e09000 (irq = 158, base_baud = 3000000) is a 8250
    [    1.144990] console [ttyS0] enabled
    [    1.150747] 48022000.serial: ttyS1 at MMIO 0x48022000 (irq = 159, base_baud = 3000000) is a 8250
    [    1.161733] 481a6000.serial: ttyS3 at MMIO 0x481a6000 (irq = 160, base_baud = 3000000) is a 8250
    [    1.173320] [drm] Initialized drm 1.1.0 20060810
    [    1.180844] tilcdc 4830e000.lcdc: no encoders/connectors found
    [    1.187030] tilcdc 4830e000.lcdc: failed to initialize mode setting
    [    1.220976] brd: module loaded
    [    1.237477] loop: module loaded
    [    1.243323] mtdoops: mtd device (mtddev=name/number) must be supplied
    [    1.322902] davinci_mdio 4a101000.mdio: davinci mdio revision 1.6
    [    1.329083] davinci_mdio 4a101000.mdio: no live phy, scanning all
    [    1.335831] davinci_mdio: probe of 4a101000.mdio failed with error -5
    [    1.343876] cpsw 4a100000.ethernet: Detected MACID = d0:ff:50:31:e3:1e
    [    1.369931] PPP generic driver version 2.4.2
    [    1.375081] PPP BSD Compression module registered
    [    1.379848] PPP Deflate Compression module registered
    [    1.385067] PPP MPPE Compression module registered
    [    1.389936] NET: Registered protocol family 24
    [    1.396732] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
    [    1.403457] ehci-pci: EHCI PCI platform driver
    [    1.408146] ehci-omap: OMAP-EHCI Host Controller driver
    [    1.413855] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
    [    1.420131] ohci-pci: OHCI PCI platform driver
    [    1.424849] ohci-platform: OHCI generic platform driver
    [    1.431299] usbcore: registered new interface driver cdc_acm
    [    1.437072] cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters
    [    1.445331] usbcore: registered new interface driver cdc_wdm
    [    1.451244] usbcore: registered new interface driver usb-storage
    [    1.457745] usbcore: registered new interface driver usbserial
    [    1.463809] usbcore: registered new interface driver option
    [    1.469534] usbserial: USB Serial support registered for GSM modem (1-port)
    [    1.480379] 47401300.usb-phy supply vcc not found, using dummy regulator
    [    1.516293] musb-hdrc musb-hdrc.0.auto: Failed to request rx1.
    [    1.522347] musb-hdrc musb-hdrc.0.auto: musb_init_controller failed with status -517
    [    1.532185] 47401b00.usb-phy supply vcc not found, using dummy regulator
    [    1.566107] musb-hdrc musb-hdrc.1.auto: Failed to request rx1.
    [    1.572137] musb-hdrc musb-hdrc.1.auto: musb_init_controller failed with status -517
    [    1.598111] mousedev: PS/2 mouse device common for all mice
    [    1.604828] i2c /dev entries driver
    [    1.608716] usbcore: registered new interface driver uvcvideo
    [    1.614701] USB Video Class driver (1.1.1)
    [    1.703953] pinctrl-single 44e10800.pinmux: pin 44e109b4.0 already requested by 44e10800.pinmux; cannot claim for leds
    [    1.714927] pinctrl-single 44e10800.pinmux: pin-109 (leds) status -22
    [    1.721525] pinctrl-single 44e10800.pinmux: could not request pin 109 (44e109b4.0) from group user_leds_s0  on device pinctrl-single
    [    1.734654] leds-gpio leds: Error applying setting, reverse things back
    [    1.753565] ledtrig-cpu: registered to indicate activity on CPUs
    [    1.760242] usbcore: registered new interface driver usbhid
    [    1.766112] usbhid: USB HID core driver
    [    1.771060]  remoteproc0: wkup_m3 is available
    [    1.775661]  remoteproc0: Note: remoteproc is still under development and considered experimental.
    [    1.784798]  remoteproc0: THE BINARY FORMAT IS NOT YET FINALIZED, and backward compatibility isn't yet guaranteed.
    [    1.795634]  remoteproc0: Direct firmware load for am335x-pm-firmware.elf failed with error -2
    [    1.808025] usbcore: registered new interface driver snd-usb-audio
    [    1.814500]  remoteproc0: Falling back to user helper
    [    1.819715] mmc1: MAN_BKOPS_EN bit is not set
    [    1.824495] usbcore: registered new interface driver snd-ua101
    [    1.830579] usbcore: registered new interface driver snd-usb-caiaq
    [    1.837540] usbcore: registered new interface driver snd-usb-6fire
    [    1.844122] usbcore: registered new interface driver snd-usb-hiface
    [    1.850681] usbcore: registered new interface driver snd-bcd2000
    [    1.857205] mmc1: new high speed MMC card at address 0001
    [    1.862986] usbcore: registered new interface driver snd_usb_pod
    [    1.869192] usbcore: registered new interface driver snd_usb_podhd
    [    1.876503] mmcblk0: mmc1:0001 004G90 3.69 GiB
    [    1.881432] mmcblk0boot0: mmc1:0001 004G90 partition 1 2.00 MiB
    [    1.887736] usbcore: registered new interface driver snd_usb_toneport
    [    1.894636] mmcblk0boot1: mmc1:0001 004G90 partition 2 2.00 MiB
    [    1.901687] usbcore: registered new interface driver snd_usb_variax
    [    1.916932] oprofile: using arm/armv7
    [    1.920863] nf_conntrack version 0.5.0 (7933 buckets, 31732 max)
    [    1.930456] ip_tables: (C) 2000-2006 Netfilter Core Team
    [    1.936472] Initializing XFRM netlink socket
    [    1.940883] NET: Registered protocol family 17
    [    1.945517] NET: Registered protocol family 15
    [    1.950134] lib80211: common routines for IEEE802.11 drivers
    [    1.956131] Key type dns_resolver registered
    [    1.960994] omap_voltage_late_init: Voltage driver support not added
    [    1.968303] cpu cpu0: of_pm_voltdm_notifier_register: Failed to get cpu0 regulator/voltdm: -517
    [    1.977179] cpu cpu0: cpu0 clock notifier not ready, retry
    [    1.983606] ThumbEE CPU extension supported.
    [    1.987971] Registering SWP/SWPB emulation handler
    [    2.013338] tps65217 0-0024: Read from reg 0x16 failed
    [    2.018550] vdds_dpr: failed to enable
    [    2.022699] tps65217 0-0024: failed to register tps65217-pmic regulator
    [    2.029639] tps65217-pmic: probe of tps65217-pmic failed with error -121
    [    2.037170] tps65217 0-0024: Failed to read revision register: -121
    [    2.043732] tps65217: probe of 0-0024 failed with error -121
    [    2.049582] omap_i2c 44e0b000.i2c: bus 0 rev0.11 at 400 kHz
    [    2.069482] musb-hdrc musb-hdrc.0.auto: MUSB HDRC host driver
    [    2.076124] musb-hdrc musb-hdrc.0.auto: new USB bus registered, assigned bus number 1
    [    2.084575] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
    [    2.091427] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    [    2.098765] usb usb1: Product: MUSB HDRC host driver
    [    2.103813] usb usb1: Manufacturer: Linux 4.1.18 musb-hcd
    [    2.109257] usb usb1: SerialNumber: musb-hdrc.0.auto
    [    2.116054] hub 1-0:1.0: USB hub found
    [    2.119945] hub 1-0:1.0: 1 port detected
    [    2.165642] musb-hdrc musb-hdrc.1.auto: MUSB HDRC host driver
    [    2.172081] musb-hdrc musb-hdrc.1.auto: new USB bus registered, assigned bus number 2
    [    2.180494] usb usb2: New USB device found, idVendor=1d6b, idProduct=0002
    [    2.187413] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    [    2.194730] usb usb2: Product: MUSB HDRC host driver
    [    2.199739] usb usb2: Manufacturer: Linux 4.1.18 musb-hcd
    [    2.205219] usb usb2: SerialNumber: musb-hdrc.1.auto
    [    2.211857] hub 2-0:1.0: USB hub found
    [    2.215892] hub 2-0:1.0: 1 port detected
    [    2.243415] cpu cpu0: of_pm_voltdm_notifier_register: Failed to get cpu0 regulator/voltdm: -517
    [    2.252200] cpu cpu0: cpu0 clock notifier not ready, retry
    [    2.259238] hctosys: unable to open rtc device (rtc0)
    [    2.273023] ALSA device list:
    [    2.276060]   No soundcards found.
    [    2.281693] Waiting for root device PARTUUID=ccd4ebea-02...
    [    2.734246] musb-hdrc musb-hdrc.0.auto: VBUS_ERROR in a_wait_vrise (80, <SessEnd), retry #3, port1 0008010c
    [    2.829990] musb-hdrc musb-hdrc.1.auto: VBUS_ERROR in a_wait_vrise (80, <SessEnd), retry #3, port1 0008010c
    ^C^C



    [   61.833106]  remoteproc0: failed to load am335x-pm-firmware.elf
    [   61.839140]  remoteproc0: powering up wkup_m3
    [   61.843825]  remoteproc0: Direct firmware load for am335x-pm-firmware.elf failed with error -2
    [   61.852498]  remoteproc0: Falling back to user helper
    [  121.853020]  remoteproc0: request_firmware failed: -11
    [  121.858211]  remoteproc0: rproc_boot failed
    [  136.592819] random: nonblocking pool is initialized