src/sys/dev/uart/uart_dev_ti8250.c, branch releng/10.2

src/sys/dev/uart/uart_dev_ti8250.c, branch releng/10.2 FreeBSD source tree https://cgit-dev.freebsd.org/src/atom?h=releng%2F10.2 2015-05-23T20:54:25Z MFC r279723, r279724: 2015-05-23T20:54:25Z Ian Lepore ian@FreeBSD.org 2015-05-23T20:54:25Z urn:sha1:ce1563f57045eaa1141637271a1409facff93ca5 Define new linker set, UART_FDT_CLASS_AND_DEVICE, for registering full (class and device) FDT UART. Define second one, UART_FDT_CLASS, for UART class only. Move the uart_class definitions and fdt compat data into the individual uart implementations, and export them using the new linker-set mechanism. Add support for uarts other than the serial console in TI OMAP SoCs. 2013-08-21T14:33:02Z Ian Lepore ian@FreeBSD.org 2013-08-21T14:33:02Z urn:sha1:aef60d8c4a5b5a4d31e56dd0288ec523f64f47bd The TI uart hardware is ns16550-compatible, except that before it can be used the clocks and power have to be enabled and a non-standard mode control register has to be set to put the device in uart mode (as opposed to irDa or other serial protocols). This adds the extra code in an extension to the standard ns8250 probe routine, and the rest of the driver is just the standard ns8250 code.