mark@pocket:~$ dmesg | grep -P 'fb|ssd' [ 2.165499] ssd1307fb 1-003c: failed to get VBAT regulator: -19
How does fbdev "find" the ssd1306? On Mon, Jan 8, 2018 at 5:51 PM David Lechner <da...@lechnology.com> wrote: > On 01/08/2018 07:27 PM, Mark Grosen wrote: > > On Mon, Jan 8, 2018 at 10:08 AM David Lechner <da...@lechnology.com> > wrote: > >> On 01/07/2018 05:59 PM, Mark Grosen wrote: >> > I am trying to get the kernel driver for the ssd1306 working with the >> PocketBeagle USB HUB cape which has a 64x32 SSD1306 display ( >> https://www.tindie.com/products/microwavemont/oled-with-24-port-usb-hub-cape-for-pocketbeagle/) >> I know it is physically working as I can use it via user-mode I2C. I >> believe a small change is needed to support the unusual 64 pixel width of >> this board. I have built and loaded a new kernel and have a .dtbo >> >> And what does your device tree overlay look like? >> > > /dts-v1/; > /plugin/; > > #include <dt-bindings/board/am335x-bbw-bbb-base.h> > #include <dt-bindings/gpio/gpio.h> > #include <dt-bindings/pinctrl/am33xx.h> > > / { > fragment@0 { > target = <&i2c1>; > __overlay__ { > status = "okay"; > > #address-cells = <1>; > #size-cells = <0>; > > ssd1306: oled@3c { > compatible = "solomon,ssd1306fb-i2c"; > reg = <0x3c>; > solomon,width = <64>; > solomon,height = <32>; > solomon,page-offset = <0>; > }; > }; > }; > }; > > >> >> > loaded via u-boot with 4.4.88-ti-r128 kernel. It shows up in >> /proc/device-tree correctly (at least as far as I can tell - the entries >> match the dts values). I am missing how to get this connected to the >> framebuffer world - there is no /dev/fb0 showing up. I see the config >> options appear to be enabled (I am using the defconfig). >> >> And which options did you enable/are enabled? > > > mark@pocket:~$ zcat /proc/config.gz | grep CONFIG_FB | grep -v '#' > CONFIG_FB=y > CONFIG_FB_CMDLINE=y > CONFIG_FB_NOTIFY=y > CONFIG_FB_CFB_FILLRECT=y > CONFIG_FB_CFB_COPYAREA=y > CONFIG_FB_CFB_IMAGEBLIT=y > CONFIG_FB_SYS_FILLRECT=y > CONFIG_FB_SYS_COPYAREA=y > CONFIG_FB_SYS_IMAGEBLIT=y > CONFIG_FB_SYS_FOPS=y > CONFIG_FB_DEFERRED_IO=y > CONFIG_FB_BACKLIGHT=y > CONFIG_FB_MODE_HELPERS=y > CONFIG_FB_TILEBLITTING=y > CONFIG_FB_SMSCUFX=m > CONFIG_FB_UDL=m > CONFIG_FB_SIMPLE=y > CONFIG_FB_SSD1307=y > > >> >> > Looks alright to me. Is there any error in `dmesg`? > > > -- > 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 beagleboard+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/8d1b9f53-ab73-6bf4-92d0-ebcfb072bb06%40lechnology.com > <https://groups.google.com/d/msgid/beagleboard/8d1b9f53-ab73-6bf4-92d0-ebcfb072bb06%40lechnology.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- 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 beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CAL8ugEcSLFrFasGKqfX44iR-UDhzeNE9nt4u4Nfirj9oDnC20A%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
