On Mon, 22 Aug 2016 17:39:09 -0500 Rob Herring <robh@xxxxxxxxxx> wrote: > tty_port_open handles much of the common parts of tty opening. Convert > uart_open to use it and move the serial_core specific parts into > tty_port.activate function. This will be needed to use tty_port functions > directly from in kernel clients. > > The tricky part is uart_port_startup can return positive values to allow > setserial to configure the port. We now return the positive value to > tty_port_open so that the tty is not marked as initialized and then set the > return value in uart_open to 0. > > Cc: Alan Cox <alan@xxxxxxxxxxxxxxx> > Cc: Peter Hurley <peter@xxxxxxxxxxxxxxxxxx> > Signed-off-by: Rob Herring <robh@xxxxxxxxxx> > --- > In looking at using tty_port for uart slaves, this is the first thing I > hit. serial_core doesn't even use the 2 functions that already exist for > tty_port and are needed. > > I've tested this on QEMU with pl011 and 8250 UARTs using setserial, but > I'm not sure what are all the tricky cases to handle. > > Greg, Don't apply these without comment from Alan and Peter. Originally I didn't convert them because the lockign was incompatible. That looks to have been fixed by other changes. This is definitely the right direction irrespective of the uart slave discussion. Acked-by: Alan Cox <alan@xxxxxxxxxxxxxxx> -- 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
