On Mon, 2018-06-04 at 20:57 +0200, Giulio Benetti wrote: > Il 04/06/2018 13:49, Andy Shevchenko ha scritto: > > On Fri, 2018-06-01 at 16:11 +0200, Giulio Benetti wrote: > > > It can be useful to override 8250 mctrl lines with gpios, for rts > > > on > > > rs485 for example, when rts is not mapped correctly to HW RTS pin. > > > > > > Enable SERIAL_MCTRL_GPIO by default. > > > > > > > Unfortunately NAK, see > > > > commit 5db4f7f80d165fc9725f356e99feec409e446baa > > Author: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> > > Date: Tue Aug 16 15:06:54 2016 +0300 > > > > Revert "tty/serial/8250: use mctrl_gpio helpers" > > > > for the details. > > > > I would love to see a solution that will satisfy everyone, though I > > have > > only means to test proposals for now. > > Thanks for pointing me that. > I would try to solve serial breakage on intel with already extisting > patches dropping this one. > I'm going to try. > > I can't understand if it's enough using qemu x86 to reproduce the bug. > If so I'm going to debug and check what makes driver to fail. You need to provide an ACPI table with UART contains GpioInt() or GpioIo() resource in it. Where GPIO number is a number of pin related to UART's RxD. > Do you think it makes sense? Would it be accepted after bug fixing? I can test on our hardware. Can't say about the rest, though. -- Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> Intel Finland Oy -- 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
