Pogoplug V4 88F6192 TCLK problem

[Jedi Tek'Unum]

My first time making changes to freebsd so I’m a noob about standards and procedures. I have a working kludge at  https://github.com/freebsd/freebsd/commit/01da3228908bfc2171daaa495ccfb0430ed60fb3

Would it be better to figure out how to submit a change request or submit a bug/enhancement request?

dmesg FYI:

KDB: debugger backends: ddb
KDB: current backend: ddb
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FreeBSD 10.1-RELEASE+pogoplugv4 #5: Mon Mar 30 09:34:41 CDT 2015
    root at freebsd:/usr/obj/arm.arm/usr/src/sys/POGOPLUGV4 arm
FreeBSD clang version 3.4.1 (tags/RELEASE_34/dot1-final 208032) 20140512
CPU: Feroceon 88FR131 rev 1 (Marvell core)
  Little-endian DC enabled IC enabled WA disabled DC streaming enabled
  BTB disabled L2 enabled L2 prefetch enabled
  WB enabled EABT branch prediction enabled
  16KB/32B 4-way instruction cache
  16KB/32B 4-way write-back-locking-C data cache
real memory  = 134213632 (127 MB)
avail memory = 122646528 (116 MB)
SOC: Marvell 88F6192 rev A1, TClock 166MHz
  Instruction cache prefetch disabled, data cache prefetch disabled
  256KB 4-way set-associative write-through unified L2 cache
random: <Software, Yarrow> initialized
ofwbus0: <Open Firmware Device Tree>
localbus0: <Marvell device bus> on ofwbus0
simplebus0: <Flattened device tree simple bus> on ofwbus0
ic0: <Marvell Integrated Interrupt Controller> mem 0x20200-0x2023b on simplebus0
timer0: <Marvell CPU Timer> mem 0x20300-0x2032f irq 1 on simplebus0
Event timer "CPUTimer0" frequency 166666667 Hz quality 1000
Timecounter "CPUTimer1" frequency 166666667 Hz quality 1000
gpio0: <Marvell Integrated GPIO Controller> mem 0x10100-0x1011f irq 35,36,37,38,39,40,41 on simplebus0
rtc0: <Marvell Integrated RTC> mem 0x10300-0x10307 on simplebus0
twsi0: <Marvell Integrated I2C Bus Controller> mem 0x11000-0x1101f irq 43 on simplebus0
iicbus0: <Philips I2C bus> on twsi0
iic0: <I2C generic I/O> on iicbus0
mge0: <Marvell Gigabit Ethernet controller> mem 0x72000-0x73fff irq 12,13,14,11,46 on simplebus0
mge0: Ethernet address: 00:25:31:05:ec:9c
miibus0: <MII bus> on mge0
e1000phy0: <Marvell 88E1116R Gigabit PHY> PHY 0 on miibus0
e1000phy0:  none, 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, 1000baseT-master, 1000baseT-FDX, 1000baseT-FDX-master, auto
uart0: <16550 or compatible> mem 0x12000-0x1201f irq 33 on simplebus0
uart0: console (1280,n,8,1)
uart1: <16550 or compatible> mem 0x12100-0x1211f irq 34 on simplebus0
cesa0: <Marvell Cryptographic Engine and Security Accelerator> mem 0x30000-0x3ffff irq 22 on simplebus0
cesa0: not powered on
device_attach: cesa0 attach returned 6
ehci0: <Marvell Integrated USB 2.0 controller> mem 0x50000-0x50fff irq 48,19 on simplebus0
usbus0: EHCI version 1.0
usbus0: set host controller mode
usbus0 on ehci0
pcib0: <Marvell Integrated PCI/PCI-E Controller> mem 0xf1040000-0xf1041fff irq 44 on ofwbus0
pci0: <PCI bus> on pcib0
xhci0: <XHCI (generic) USB 3.0 controller> mem 0xf1300000-0xf130ffff,0xf1310000-0xf1310fff,0xf1311000-0xf1311fff at device 1.0 on pci0
xhci0: 32 byte context size.
usbus1 on xhci0
cryptosoft0: <software crypto>
Timecounters tick every 10.000 msec
IPsec: Initialized Security Association Processing.
ipfw2 (+ipv6) initialized, divert enabled, nat enabled, default to accept, logging disabled
DUMMYNET 0 with IPv6 initialized (100409)
load_dn_sched dn_sched QFQ loaded
load_dn_sched dn_sched RR loaded
load_dn_sched dn_sched WF2Q+ loaded
load_dn_sched dn_sched FIFO loaded
load_dn_sched dn_sched PRIO loaded
usbus0: 480Mbps High Speed USB v2.0
usbus1: 5.0Gbps Super Speed USB v3.0
ugen0.1: <Marvell> at usbus0
uhub0: <Marvell EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus0
ugen1.1: <0x1b73> at usbus1
uhub1: <0x1b73 XHCI root HUB, class 9/0, rev 3.00/1.00, addr 1> on usbus1
random: unblocking device.
uhub1: 4 ports with 4 removable, self powered
uhub0: 1 port with 1 removable, self powered
Root mount waiting for: usbus1 usbus0
ugen1.2: <vendor 0x0bda> at usbus1
urtwn0: <vendor 0x0bda product 0x8176, class 0/0, rev 2.00/2.00, addr 1> on usbus1
urtwn0: MAC/BB RTL8188CUS, RF 6052 1T1R
Root mount waiting for: usbus0
ugen0.2: <SanDisk> at usbus0
umass0: <SanDisk Cruzer Fit, class 0/0, rev 2.00/1.27, addr 2> on usbus0
Trying to mount root from ufs:/dev/ufs/kirkwoodroot []...
mountroot: waiting for device /dev/ufs/kirkwoodroot ...
da0 at umass-sim0 bus 0 scbus0 target 0 lun 0
da0: <SanDisk Cruzer Fit 1.27> Removable Direct Access SCSI-6 device 
da0: Serial Number 4C530012241231105045
da0: 40.000MB/s transfers
da0: 7633MB (15633408 512 byte sectors: 255H 63S/T 973C)
da0: quirks=0x2<NO_6_BYTE>