At Sun, 9 Jun 2019 19:23:12 -0500 Robert Nelson <[email protected]> wrote:
> > On Sun, Jun 9, 2019 at 7:19 PM Robert Heller <[email protected]> wrote: > > > > OK, I have made use of the MCP23008 and MCP23017, 8 bit and 16 bit GPIO > > expanders that are I2C connected on Raspberry Pis. The Raspberry Pi kernels > > include both an overlay (Device Tree Blob) and a driver module for the > > MCP23008 and MCP23017 chips. I would also like to make use of these chips > > on > > my beagle boards (a BeagleBoneBlack and a PocketBeagle). > > > > I just did some poking around on my BBB, and there are neither Device Tree > > Blobs nor driver modules for the MCP23008 and MCP23017 chips. > > > > So, my question is: What is involved in building the missing driver modules > > and Device Tree Blobs -- I have built driver modules and even rebuilt whole > > kernels on x86 Linux boxen, so I have passing knowledge of how that goes, > > what > > I am really wondering: is there a repo with .deb files containing the > > "extra" > > ko files? Or tarballs containing the additional sources? I realize the BBB > > and PB are rather slow, so maybe I should cross build this on one of my Pis? > > Or is there an alternitive kernel I can upgrade to that includes these > > modules? > > > > Right now my two Beagles are running 4.14.71-ti-r80, Debian GNU/Linux 9, > > BeagleBoard.org Debian Image 2018-10-07. I did do a apt-get update/apt-get > > dist-upgrade about a month ago (May 14). > > it's enabled, just after r80 came out.. Just run, and then reboot.. > > sudo /opt/scripts/tools/update_kernel.sh OK, I did the above and did a apt-get dist-upgrade. The kernel module is there, but there isn't a Device Tree Blob for the *I2C* mcp23* chips, just a Device Tree Blob (/lib/firmware/BB-SPI0-MCP23S08-00A0.dtbo) for the SPI interface. During the kernel update the package linux-firmware-image-4.14.108-ti-r106 was suggested, but apt-get install is complaining when I try to install it: snoopy% sudo apt-get install linux-firmware-image-4.14.108-ti-r106 Reading package lists... Done Building dependency tree Reading state information... Done Package linux-firmware-image-4.14.108-ti-r106 is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source E: Package 'linux-firmware-image-4.14.108-ti-r106' has no installation candidate I do have device tree blobs on the RPi and can get a device tree blob source file from the RPi device tree source repo. I guess it is *possible* to compile a device tree blob for the beagles, but want to be sure and would rather get a device tree blob properly built for the Beagles. > > Regards, > -- Robert Heller -- 978-544-6933 Deepwoods Software -- Custom Software Services http://www.deepsoft.com/ -- Linux Administration Services [email protected] -- Webhosting Services -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/20190610145657.5C03E26C0006%40sharky3.deepsoft.com. For more options, visit https://groups.google.com/d/optout.
