File:  [NetBSD Developer Wiki] / wikisrc / ports / evbarm / tegra.mdwn
Revision 1.42: download - view: text, annotated - select for diffs
Fri Apr 14 11:11:38 2017 UTC (4 years ago) by jmcneill
Branches: MAIN
CVS tags: HEAD
Describe how to enable GPU (nouveau) support.

    1: [[!meta title="NetBSD/evbarm on NVIDIA Tegra"]]
    2: 
    3: The NetBSD tegra port currently supports the NVIDIA Tegra K1 (32-bit) system-on-a-chip. The [NVIDIA Jetson TK1 development kit](https://developer.nvidia.com/jetson-tk1) is a board based on the Tegra K1 SoC.
    4: 
    5: [[!toc levels=2]]
    6: 
    7: # Supported hardware
    8:  - CPU: Cortex-A15: NVIDIA Tegra K1 (T124) (4-core)
    9:    - VFP / NEON
   10:    - CPU frequency scaling
   11:  - GIC
   12:  - ARM generic timer
   13:  - Clock and reset controller
   14:  - GPIO controller
   15:  - MPIO / pinmux controller
   16:  - Memory controller
   17:  - Power management controller
   18:  - I2C controller
   19:  - UART [[!template id=man name="com" section="4"]] serial console
   20:  - RTC
   21:  - Watchdog timer
   22:  - SDMMC [[!template id=man name="sdhc" section="4"]] controller
   23:  - USB 2.0 [[!template id=man name="ehci" section="4"]] controller
   24:  - USB 3.0 [[!template id=man name="xhci" section="4"]] controller
   25:    - Requires the [sysutils/tegra-firmware](http://pkgsrc.se/sysutils/tegra-firmware) package to be installed.
   26:  - PCI express
   27:  - SATA [[!template id=man name="ahcisata" section="4"]] controller
   28:  - HDMI
   29:    - Framebuffer console
   30:    - HDMI Audio [[!template id=man name="hdaudio" section="4"]] controller
   31:    - HDMI CEC
   32:  - Jetson TK1
   33:    - On-board Realtek 8111G [[!template id=man name="re" section="4"]] gigabit ethernet 
   34:    - EEPROM [[!template id=man name="seeprom" section="4"]] (on I2C)
   35:    - TMP451 [[!template id=man name="titemp" section="4"]] temperature sensor (on I2C)
   36:    - RF kill switch
   37:    - Power button
   38:  - AS3722 power management unit
   39:  - eFUSE
   40:  - SoC thermal sensors
   41: 
   42: 
   43: # TODO
   44:  - Memory controller SMMU support
   45:  - APB DMA
   46:  - Audio Hub (AHUB)
   47:  - GPU (nouveau)
   48:  - SPI controller
   49:  - PWM controller
   50:  - PCIe MSI support
   51:  - CL-DVFS
   52:  - LVDS/eDP display output
   53: 
   54: # Generating a boot script
   55: 
   56: The Tegra kernels need a .dtb for your board to boot. The dtb here was updated on 2017-04-13 and is generated from a Linux 4.10.10 source tree. [NVIDIA Jetson TK1 .dtb](http://ftp.netbsd.org/pub/NetBSD/misc/jmcneill/tegra/tegra124-jetson-tk1.dtb)
   57: 
   58: [[!template  id=programlisting text="""
   59: $ cat boot.txt
   60: setenv bootargs root=ld1a
   61: fatload mmc 1:1 0x90000000 netbsd.ub
   62: fatload mmc 1:1 ${fdt_addr_r} tegra124-jetson-tk1.dtb
   63: fdt addr ${fdt_addr_r}
   64: bootm 0x90000000 - ${fdt_addr_r}
   65: $ mkubootimage -A arm -C none -O netbsd -T script -a 0 -n "NetBSD/tegra boot" boot.txt boot.scr
   66: """]]
   67: 
   68: # Getting U-Boot
   69: 
   70: Jetson TK1 boards come with Linux4Tegra R19.x installed, which doesn't use U-Boot. The easiest way to get U-Boot is to upgrade to Linux4Tegra R21.x (Linux PC or VM required) following the [quick start guide](http://developer.download.nvidia.com/embedded/L4T/r21_Release_v4.0/l4t_quick_start_guide.txt).
   71: 
   72: # Modesetting
   73: 
   74: ## Console
   75: 
   76: To override the default video mode (auto-detected from display EDID), use the *video* kernel command-line parameter:
   77: 
   78: [[!template  id=programlisting text="""
   79: video=<xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd]
   80: """]]
   81: 
   82: ## Xorg
   83: 
   84: To be able to use the mode setting features of the Tegra DRM driver, you must use the xf86-video-modesetting driver. Put this in xorg.conf:
   85: 
   86: [[!template  id=programlisting text="""
   87: Section "Device"
   88:     Identifier "DRM Modesetting"
   89:     Driver "modesetting"
   90: EndSection
   91: """]]
   92: 
   93: # GPU (nouveau)
   94: 
   95: To enable the GPU, add the following before the ''bootm'' command in the boot script:
   96: 
   97: [[!template  id=programlisting text="""
   98: fdt set /gpu@0,57000000 status okay
   99: """]]
  100: 
  101: For the nouveau driver to load successfully, firmware is required:
  102:  - Install the [sysutils/tegra-firmware](http://pkgsrc.se/sysutils/tegra-firmware) package from pkgsrc.
  103:  - Extract the contents of [tegra-nouveau-firmware.tar.gz](http://cdn.netbsd.org/pub/NetBSD/misc/jmcneill/tegra/tegra-nouveau-firmware.tar.gz) to ''/libdata/firmware/nouveau''.
  104: 
  105: You should see the following messages at boot:
  106: 
  107: [[!template  id=programlisting text="""
  108: nouveau0 at fdt0: GPU
  109: drm kern info: nouveau  [  DEVICE][nouveau0] BOOT0  : 0x0ea000a1
  110: drm kern info: nouveau  [  DEVICE][nouveau0] Chipset: GK20A (NVEA)
  111: drm kern info: nouveau  [  DEVICE][nouveau0] Family : NVE0
  112: drm kern info: nouveau  [     PFB][nouveau0] RAM type: stolen system memory
  113: drm kern info: nouveau  [     PFB][nouveau0] RAM size: 2019 MiB
  114: drm kern info: nouveau  [     PFB][nouveau0]    ZCOMP: 0 tags
  115: drm kern info: nouveau  [  PGRAPH][nouveau0] using external firmware
  116: drm kern info: nouveau  [     DRM] VRAM: 2019 MiB
  117: drm kern info: nouveau  [     DRM] GART: 1048576 MiB
  118: drm kern error: nouveau E[   PFIFO][nouveau0] unsupported engines 0x00000030
  119: drm kern error: nouveau E[     DRM] failed to create ce channel, -22
  120: drm kern info: nouveau  [     DRM] MM: using GRCE for buffer copies
  121: nouveau0: initialized nouveau 1.1.1 20120801 on minor 1
  122: """]]
  123: 
  124: # dmesg
  125: 
  126: [[!template  id=programlisting text="""
  127: Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
  128:     2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015
  129:     The NetBSD Foundation, Inc.  All rights reserved.
  130: Copyright (c) 1982, 1986, 1989, 1991, 1993
  131:     The Regents of the University of California.  All rights reserved.
  132: 
  133: NetBSD 7.99.23 (JETSONTK1) #657: Sun Dec 13 12:33:17 AST 2015
  134: 	jmcneill@megatron.local:/Users/jmcneill/netbsd/src/sys/arch/evbarm/compile/obj/JETSONTK1
  135: total memory = 2047 MB
  136: avail memory = 2020 MB
  137: sysctl_createv: sysctl_create(machine_arch) returned 17
  138: timecounter: Timecounters tick every 10.000 msec
  139: mainbus0 (root)
  140: cpu0 at mainbus0 core 0: 2316 MHz Cortex-A15 r3p3 (Cortex V7A core)
  141: cpu0: DC enabled IC enabled WB disabled EABT branch prediction enabled
  142: cpu0: 32KB/64B 2-way L1 PIPT Instruction cache
  143: cpu0: 32KB/64B 2-way write-back-locking-C L1 PIPT Data cache
  144: cpu0: 2048KB/64B 16-way write-through L2 PIPT Unified cache
  145: vfp0 at cpu0: NEON MPE (VFP 3.0+), rounding, NaN propagation, denormals
  146: cpu1 at mainbus0 core 1
  147: cpu2 at mainbus0 core 2
  148: cpu3 at mainbus0 core 3
  149: armperiph0 at mainbus0
  150: armgic0 at armperiph0: Generic Interrupt Controller, 192 sources (183 valid)
  151: armgic0: 32 Priorities, 160 SPIs, 7 PPIs, 16 SGIs
  152: armgtmr0 at armperiph0: ARMv7 Generic 64-bit Timer (12000 kHz)
  153: armgtmr0: interrupting on irq 27
  154: timecounter: Timecounter "armgtmr0" frequency 12000000 Hz quality 500
  155: tegrafdt0 at mainbus0
  156: fdt0 at tegrafdt0: NVIDIA Tegra124 Jetson TK1
  157: gic0 at fdt0: GIC
  158: tegralic0 at fdt0: LIC
  159: tegracar0 at fdt0: CAR
  160: clock at fdt0 not configured
  161: tegrampio0 at fdt0: MPIO
  162: tegragpio0 at fdt0: GPIO
  163: gpio0 at tegragpio0 (A): 8 pins
  164: gpio1 at tegragpio0 (B): 8 pins
  165: gpio2 at tegragpio0 (C): 8 pins
  166: gpio3 at tegragpio0 (D): 8 pins
  167: gpio4 at tegragpio0 (E): 8 pins
  168: gpio5 at tegragpio0 (F): 8 pins
  169: gpio6 at tegragpio0 (G): 8 pins
  170: gpio7 at tegragpio0 (H): 8 pins
  171: gpio8 at tegragpio0 (I): 8 pins
  172: gpio9 at tegragpio0 (J): 8 pins
  173: gpio10 at tegragpio0 (K): 8 pins
  174: gpio11 at tegragpio0 (L): 8 pins
  175: gpio12 at tegragpio0 (M): 8 pins
  176: gpio13 at tegragpio0 (N): 8 pins
  177: gpio14 at tegragpio0 (O): 8 pins
  178: gpio15 at tegragpio0 (P): 8 pins
  179: gpio16 at tegragpio0 (Q): 8 pins
  180: gpio17 at tegragpio0 (R): 8 pins
  181: gpio18 at tegragpio0 (S): 8 pins
  182: gpio19 at tegragpio0 (T): 8 pins
  183: gpio20 at tegragpio0 (U): 8 pins
  184: gpio21 at tegragpio0 (V): 8 pins
  185: gpio22 at tegragpio0 (W): 8 pins
  186: gpio23 at tegragpio0 (X): 8 pins
  187: gpio24 at tegragpio0 (Y): 8 pins
  188: gpio25 at tegragpio0 (Z): 8 pins
  189: gpio26 at tegragpio0 (AA): 8 pins
  190: gpio27 at tegragpio0 (BB): 8 pins
  191: gpio28 at tegragpio0 (CC): 8 pins
  192: gpio29 at tegragpio0 (DD): 8 pins
  193: gpio30 at tegragpio0 (EE): 8 pins
  194: simplebus0 at fdt0: regulators
  195: fdt1 at simplebus0
  196: fregulator0 at fdt1: +VDD_MUX
  197: fregulator1 at fdt1: +5V_SYS
  198: fregulator2 at fdt1: +3.3V_SYS
  199: fregulator3 at fdt1: +3.3V_RUN
  200: fregulator4 at fdt1: +3.3V_AVDD_HDMI_AP_GATED
  201: fregulator5 at fdt1: +USB0_VBUS_SW
  202: fregulator6 at fdt1: +5V_USB_HS
  203: fregulator7 at fdt1: +3.3V_LP0
  204: fregulator8 at fdt1: +1.05V_RUN_AVDD_HDMI_PLL
  205: fregulator9 at fdt1: +5V_HDMI_CON
  206: fregulator10 at fdt1: +5V_SATA
  207: fregulator11 at fdt1: +12V_SATA
  208: dma at fdt0 not configured
  209: tegrapmc0 at fdt0: PMC
  210: tegramc0 at fdt0: MC
  211: tegramc0: interrupting on LIC irq 109
  212: tegrai2c0 at fdt0: I2C1
  213: tegrai2c0: interrupting on LIC irq 70
  214: iic0 at tegrai2c0: I2C bus
  215: audio-codec at iic0 addr 0x1c not configured
  216: titemp0 at iic0 addr 0x4c: TMP451
  217: seeprom0 at iic0 addr 0x56: eeprom: size 256
  218: tegrai2c1 at fdt0: I2C2
  219: tegrai2c1: interrupting on LIC irq 116
  220: iic1 at tegrai2c1: I2C bus
  221: tegrai2c2 at fdt0: I2C3
  222: tegrai2c2: interrupting on LIC irq 124
  223: iic2 at tegrai2c2: I2C bus
  224: tegrai2c3 at fdt0: I2C4
  225: tegrai2c3: interrupting on LIC irq 152
  226: iic3 at tegrai2c3: I2C bus
  227: tegrai2c4 at fdt0: I2C5
  228: tegrai2c4: interrupting on LIC irq 85
  229: iic4 at tegrai2c4: I2C bus
  230: as3722pmic0 at iic4 addr 0x40: AMS AS3822
  231: as3722pmic0: default watchdog period is 10 seconds
  232: tegrausbphy0 at fdt0: USB PHY2
  233: tegrausbphy1 at fdt0: USB PHY3
  234: tegrapcie0 at fdt0: PCIE
  235: tegrapcie0: interrupting on LIC irq 130
  236: pci0 at tegrapcie0 bus 0
  237: pci0: i/o space, memory space enabled, rd/line, rd/mult, wr/inv ok
  238: ppb0 at pci0 dev 0 function 0: vendor 10de product 0e12 (rev. 0xa1)
  239: ppb0: PCI Express capability version 2 <Root Port of PCI-E Root Complex> x2 @ 5.0GT/s
  240: ppb0: link is x1 @ 2.5GT/s
  241: pci1 at ppb0 bus 1
  242: pci1: i/o space, memory space enabled, rd/line, wr/inv ok
  243: athn0 at pci1 dev 0 function 0: Atheros AR9285
  244: athn0: rev 2 (1T1R), ROM rev 13, address 00:17:c4:d7:d0:58
  245: athn0: interrupting at LIC irq 130
  246: athn0: 11b rates: 1Mbps 2Mbps 5.5Mbps 11Mbps
  247: athn0: 11g rates: 1Mbps 2Mbps 5.5Mbps 11Mbps 6Mbps 9Mbps 12Mbps 18Mbps 24Mbps 36Mbps 48Mbps 54Mbps
  248: ppb1 at pci0 dev 1 function 0: vendor 10de product 0e13 (rev. 0xa1)
  249: ppb1: PCI Express capability version 2 <Root Port of PCI-E Root Complex> x1 @ 5.0GT/s
  250: ppb1: link is x1 @ 2.5GT/s
  251: pci2 at ppb1 bus 2
  252: pci2: i/o space, memory space enabled, rd/line, wr/inv ok
  253: re0 at pci2 dev 0 function 0: RealTek 8168/8111 PCIe Gigabit Ethernet (rev. 0x0c)
  254: re0: interrupting at LIC irq 130
  255: re0: Ethernet address 00:04:4b:2f:51:a2
  256: re0: using 512 tx descriptors
  257: rgephy0 at re0 phy 7: RTL8251 1000BASE-T media interface, rev. 0
  258: rgephy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT-FDX, auto
  259: tegradrm0 at fdt0
  260: drm: Supports vblank timestamp caching Rev 2 (21.10.2013).
  261: drm: No driver support for vblank timestamp query.
  262: tegrafb0 at tegradrm0
  263: tegrafb0: framebuffer at 0x9bc00000, size 1920x1080, depth 32, stride 7680
  264: wsdisplay0 at tegrafb0 kbdmux 1
  265: wsmux1: connecting to wsdisplay0
  266: wsdisplay0: screen 0-3 added (default, vt100 emulation)
  267: tegradrm0: info: registered panic notifier
  268: tegradrm0: initialized tegra 0.1.0 20151108 on minor 0
  269: tegratimer0 at fdt0: Timers
  270: tegratimer0: default watchdog period is 10 seconds
  271: flow-controller at fdt0 not configured
  272: actmon at fdt0 not configured
  273: apbmisc at fdt0 not configured
  274: com0 at fdt0: ns16550a, working fifo
  275: com0: console
  276: com0: interrupting on LIC irq 122
  277: spi at fdt0 not configured
  278: spi at fdt0 not configured
  279: tegrartc0 at fdt0: RTC
  280: tegrafuse0 at fdt0: FUSE
  281: emc at fdt0 not configured
  282: ahcisata0 at fdt0: SATA
  283: ahcisata0: couldn't acquire vddio-supply
  284: ahcisata0: couldn't acquire avdd-supply
  285: ahcisata0: interrupting on LIC irq 55
  286: ahcisata0: AHCI revision 1.31, 2 ports, 32 slots, CAP 0xe620ff01<PSC,SSC,PMD,ISS=0x2=Gen2,SAL,SALP,SSNTF,SNCQ,S64A>
  287: atabus0 at ahcisata0 channel 0
  288: hdaudio0 at fdt0: HDA
  289: hdaudio0: interrupting on LIC irq 113
  290: hdafg0 at hdaudio0: NVIDIA Tegra124 HDMI
  291: hdafg0: HDMI00 8ch: Digital Out [Jack]
  292: hdafg0: 8ch/0ch 44100Hz PCM16*
  293: audio0 at hdafg0: full duplex, playback, capture, mmap, independent
  294: tegraxusbpad0 at fdt0: XUSB PADCTL
  295: sdhc0 at fdt0: SDMMC3
  296: sdhc0: interrupting on LIC irq 51
  297: sdhc0: SDHC 4.0, rev 3, 32-bit ADMA2, 204000 kHz, HS SDR50 SDR104 HS200 1.8V 3.0V 3.3V, re-tuning mode 1, 4096 byte blocks
  298: sdmmc0 at sdhc0 slot 0
  299: sdhc1 at fdt0: SDMMC4
  300: sdhc1: interrupting on LIC irq 63
  301: sdhc1: SDHC 4.0, rev 3, 32-bit ADMA2, 204000 kHz, HS SDR50 SDR104 HS200 1.8V 3.0V 3.3V, re-tuning mode 1, 4096 byte blocks
  302: sdmmc1 at sdhc1 slot 0
  303: tegrasoctherm0 at fdt0: SOC_THERM
  304: ahub at fdt0 not configured
  305: ehci0 at fdt0: USB2
  306: ehci0: interrupting on LIC irq 53
  307: ehci0: EHCI version 1.10
  308: ehci0: switching to host mode
  309: usb0 at ehci0: USB revision 2.0
  310: ehci1 at fdt0: USB3
  311: ehci1: interrupting on LIC irq 129
  312: ehci1: EHCI version 1.10
  313: ehci1: switching to host mode
  314: usb1 at ehci1: USB revision 2.0
  315: pmu at fdt0 not configured
  316: timer at fdt0 not configured
  317: simplebus1 at fdt0: clocks
  318: fdt2 at simplebus1
  319: clock at fdt2 not configured
  320: gpio-keys at fdt0 not configured
  321: sound at fdt0 not configured
  322: timecounter: Timecounter "clockinterrupt" frequency 100 Hz quality 0
  323: cpu3: 2316 MHz Cortex-A15 r3p3 (Cortex V7A core)
  324: cpu3: DC enabled IC enabled WB disabled EABT branch prediction enabled
  325: cpu3: 32KB/64B 2-way L1 PIPT Instruction cache
  326: cpu3: 32KB/64B 2-way write-back-locking-C L1 PIPT Data cache
  327: cpu3: 2048KB/64B 16-way write-through L2 PIPT Unified cache
  328: vfp3 at cpu3: NEON MPE (VFP 3.0+), rounding, NaN propagation, denormals
  329: cpu1: 2316 MHz Cortex-A15 r3p3 (Cortex V7A core)
  330: cpu1: DC enabled IC enabled WB disabled EABT branch prediction enabled
  331: cpu1: 32KB/64B 2-way L1 PIPT Instruction cache
  332: cpu1: 32KB/64B 2-way write-back-locking-C L1 PIPT Data cache
  333: cpu1: 2048KB/64B 16-way write-through L2 PIPT Unified cache
  334: vfp1 at cpu1: NEON MPE (VFP 3.0+), rounding, NaN propagation, denormals
  335: cpu2: 2316 MHz Cortex-A15 r3p3 (Cortex V7A core)
  336: cpu2: DC enabled IC enabled WB disabled EABT branch prediction enabled
  337: cpu2: 32KB/64B 2-way L1 PIPT Instruction cache
  338: cpu2: 32KB/64B 2-way write-back-locking-C L1 PIPT Data cache
  339: cpu2: 2048KB/64B 16-way write-through L2 PIPT Unified cache
  340: vfp2 at cpu2: NEON MPE (VFP 3.0+), rounding, NaN propagation, denormals
  341: uhub0 at usb0: Tegra EHCI root hub, class 9/0, rev 2.00/1.00, addr 1
  342: uhub0: 1 port with 1 removable, self powered
  343: ahcisata0 port 0: device present, speed: 3.0Gb/s
  344: uhub1 at usb1: Tegra EHCI root hub, class 9/0, rev 2.00/1.00, addr 1
  345: uhub1: 1 port with 1 removable, self powered
  346: sdhc1: cmd timeout error
  347: IPsec: Initialized Security Association Processing.
  348: ld0 at sdmmc1: <0x45:0x0100:SEM16G:0x00:0x0301ff34:0x000>
  349: ld0: 15028 MB, 7633 cyl, 64 head, 63 sec, 512 bytes/sect x 30777344 sectors
  350: ld0: GPT GUID: a81e231f-7b1c-c564-1473-5ac55e4b7963
  351: dk0 at ld0: "APP", 29360128 blocks at 94208, type: <unknown>
  352: dk1 at ld0: "DTB", 8192 blocks at 29454336, type: <unknown>
  353: ld1 at sdmmc0dk2 at ld0: "EFI", 131072 blocks at 29462528, type: <unknown>
  354: : <0x27:0x5048:SD64G:0x30:0x01ce4def:0x0dc>
  355: dk3 at ld0: "USP", 8192 blocks at 29593600, type: <unknown>
  356: dk4 at ld0: "TP1", 8192 blocks at 29601792, type: <unknown>
  357: dk5 at ld0: "TP2", 8192 blocks at 29609984, type: <unknown>
  358: dk6 at ld0: "TP3", 8192 blocks at 29618176, type: <unknown>
  359: dk7 at ld0: "WB0", 4096 blocks at 29626368, type: <unknown>
  360: dk8 at ld0: "UDA", 1142784 blocks at 29630464, type: <unknown>
  361: ld0: 8-bit width, HS200, 200.000 MHz
  362: ld1: 59504 MB, 7585 cyl, 255 head, 63 sec, 512 bytes/sect x 121864192 sectors
  363: ld1: 4-bit width, SDR104, 204.000 MHz
  364: wd0 at atabus0 drive 0
  365: wd0: <OCZ-AGILITY3>
  366: wd0: drive supports 16-sector PIO transfers, LBA48 addressing
  367: wd0: 111 GB, 232581 cyl, 16 head, 63 sec, 512 bytes/sect x 234441648 sectors
  368: wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 6 (Ultra/133)
  369: wd0(ahcisata0:0:0): using PIO mode 4, DMA mode 2, Ultra-DMA mode 6 (Ultra/133) (using DMA)
  370: uhidev0 at uhub1 port 1 configuration 1 interface 0
  371: uhidev0: Logitech USB Receiver, rev 2.00/29.00, addr 2, iclass 3/1
  372: ukbd0 at uhidev0: 8 modifier keys, 6 key codes
  373: wskbd0 at ukbd0 mux 1
  374: wskbd0: connecting to wsdisplay0
  375: uhidev1 at uhub1 port 1 configuration 1 interface 1
  376: uhidev1: Logitech USB Receiver, rev 2.00/29.00, addr 2, iclass 3/1
  377: uhidev1: 17 report ids
  378: ums0 at uhidev1 reportid 2: 16 buttons, W and Z dirs
  379: wsmouse0 at ums0 mux 0
  380: uhid0 at uhidev1 reportid 3: input=4, output=0, feature=0
  381: uhid1 at uhidev1 reportid 4: input=1, output=0, feature=0
  382: uhid2 at uhidev1 reportid 16: input=6, output=6, feature=0
  383: uhid3 at uhidev1 reportid 17: input=19, output=19, feature=0
  384: boot device: wd0
  385: root on wd0a dumps on wd0b
  386: root file system type: ffs
  387: kern.module.path=/stand/evbarm/7.99.23/modules
  388: WARNING: preposterous TOD clock time
  389: WARNING: using filesystem time
  390: WARNING: CHECK AND RESET THE DATE!
  391: """]]
  392: 
  393: # Links
  394: 
  395: - [NVIDIA Jetson TK1 development kit](https://developer.nvidia.com/jetson-tk1)
  396: - [Hardware documentation](https://developer.nvidia.com/hardware-design-and-development)
  397: - [Linux For Tegra](https://developer.nvidia.com/linux-tegra)
  398: - [Device Tree](http://www.devicetree.org)
  399: 
  400: .

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