** Description changed: Support Intel Atom (Baytrail-I) HS-UART serdev slaves over tty On systems using Intel Atom (Baytrail-I) SoC's, slave devices connected on HSUART1/2 ports are described by the ACPI BIOS as virtual hardware using HID's INT3511/INT3512 [1]. As a consequence, HW manufacturers have complete freedom to install any devices on-board as long as they can be accessed over serial tty interface. Once such device is Dell Edge 3002 IoT Gateway which sports ZigBee & GPS devices on the HS-UART ports 1 & 2 respectively. Post 4.15, with CONFIG_SERIAL_DEV_BUS=y, serdev port controller driver handles the enumeration for the slaves connected on these ports. Also, /dev/ttySx device nodes for these ports are no longer exposed to the userspace. + This driver has been submitted upstream and is under review. This issue has + been identified as a regression in 4.15 and multiple solutions are being + explored. Meanwhile, to support customer and maintain release schedule, + this driver needs to be in Ubuntu 4.15 based kernels. + + The impact is limited to systems based on Intel Atom E38XX (Baytrail-I) + SoC's. + + More info: + https://marc.info/?t=152455871600007&r=1&w=2 + Please don't triage, this bug is for tracking purposes only.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1769610 Title: Support Intel Atom (Baytrail-I) HS-UART serdev slaves over tty To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-oem/+bug/1769610/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
