Changes between Version 22 and Version 23 of faq


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Timestamp:
08/24/2018 07:11:25 PM (18 months ago)
Author:
Cale Collins
Comment:

added section: I'm using mainline Linux, or do not have a GSC driver. What do I loose and is there a work around?

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  • faq

    v22 v23  
    265265No, this feature is not available on any Gateworks SBC.  In most cases using POE will be the most effective method of powering on and off the board with Ethernet. 
    266266
     267== I'm using mainline Linux, or do not have a GSC driver.  What do I loose and is there a work around?
     268
     269Getting our GSC driver to be adopted by the mainline kernel community has been an up hill battle, hence the long delay in its implementation.  Many of its features are still accessible using I2C commands and other methods:
     270* The RTC is compatible with the standard Linux ds1672 RTC driver and thus works with the standard Linux RTC device API.
     271 * http://trac.gateworks.com/wiki/gsc#RealTimeClock
     272* Voltage and temperature monitoring can be accomplished using I2C commands.
     273 * http://trac.gateworks.com/wiki/gsc#SystemTemperatureandVoltageMonitor
     274* GPIO expansion does not require GSC drivers.
     275 * http://trac.gateworks.com/wiki/gsc#GeneralPurposeInputandOutputGPIO
     276 * http://trac.gateworks.com/wiki/gpio
     277* You can achieve tamper protection using GPIO.
     278 * http://trac.gateworks.com/wiki/gsc#GeneralPurposeInputandOutputGPIO
     279* Hardware watchdog, this is where you may run into trouble using GSC, though the CPU watchdog will be adequate in many cases.  The issue here will be the inability for the GSC to disable board power.
     280 * http://trac.gateworks.com/wiki/gsc#HardwareWatchdog
     281* Reset monitor, for this you will need a GSC driver.
     282 * http://trac.gateworks.com/wiki/gsc#ResetMonitor
     283* Software field-upgradable firmware, sysupgrade is available in our pre-release of Gateworks-OpenWrt 18.0x and mainline OpenWrt 18.06
     284 * http://trac.gateworks.com/wiki/OpenWrt/sysupgrade
     285 * Also, you can use TFTP to flash firmware from the boot loader
     286  * http://trac.gateworks.com/wiki/ventana/openwrt#InstallingFirmwareviaSerialEthernetTFTPusingthebootloader
     287  * None of these methods will allow you to update u-boot, or SPL.  This must be done with Jtag, even when the GSC driver is available.