• Benjamin Herrenschmidt's avatar
    tty/serial/pmac_zilog: Fix suspend & resume · a79dd5ae
    Benjamin Herrenschmidt authored
    This patch reworks & simplifies pmac_zilog handling of suspend/resume,
    essentially removing all the specific code in there and using the
    generic uart helpers.
    
    This required properly registering the tty as a child of the macio (or platform)
    device, so I had to delay the registration a bit (we used to register the ports
    very very early). We still register the kernel console early though.
    
    I removed a couple of unused or useless flags as well, relying on the
    core to not call us when asleep. I also removed the essentially useless
    interrupt mutex, simplifying the locking a bit.
    
    I removed some code for handling unexpected interrupt which should never
    be hit and could potentially be harmful (causing us to access a register
    on a powered off SCC). We diable port interrupts on close always so there
    should be no need to drain data on a closed port.
    Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
    a79dd5ae
pmac_zilog.c 50.2 KB