Hi Greg, This series fixes 8250 console resume from system sleep when the console has been powered down, even though consoles aren't suspending (eg., no_console_suspend on the kernel command line). Patch 1 refactors the overly-complicated fall-through logic for determining if the port should be shutdown. Patches 2-5 refactor serial8250_do_set_termios() so that the divisor programming can be used to reprogram the divisor when the port has been powered-down during system sleep. [ Patch 3, "serial: 8250: Refactor LCR computation" is, strictly speaking, not a required cleanup for this series. However, it will facilitate re-use by the omap_8250 driver. ] Patch 6 implements the console restart by cribbing from an idea first put forth by Doug Anderson <dianders@xxxxxxxxxxxx> to use the scratch register to discover the port has been powered-down. This patch implements this restart for all 8250 drivers _except_ omap_8250 (which has a different divisor scheme) and 8250_dw which unfortunately declares itself to be a PORT_8250 type (fixing this in the 8250_dw driver will enable console restart for DW ports). Patch 7 is a straggler fix which became obvious once all the refactoring cleaned up serial8250_do_set_termios(). Regards, Peter Hurley (7): serial: core: Simplify console suspend logic in uart_suspend_port() serial: 8250: Move UART_BUG_QUOT workaround serial: 8250: Refactor LCR computation serial: 8250: Refactor divisor programming serial: 8250: Refactor XR17V35X divisor calculation serial: 8250: Use canary to restart console after suspend serial: 8250: Prevent concurrent updates to shadow registers drivers/tty/serial/8250/8250_core.c | 187 ++++++++++++++++++++++++------------ drivers/tty/serial/serial_core.c | 35 ++++--- include/linux/serial_8250.h | 3 + 3 files changed, 144 insertions(+), 81 deletions(-) -- 2.2.2 -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
