From: Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> Sent: Friday, July 17, 2020 4:58 PM > On Fri, Jul 17, 2020 at 04:18:27PM +0800, Fugang Duan wrote: > > GKI kernel requires drivers built as modules including console driver, > > so add the support that imx serial console driver can be built as > > module. > > > > The changes of the patch: > > - imx console driver can be built as module. > > - move out earlycon code to separated driver like imx_earlycon.c, > > and imx earlycon driver only support build-in. > > > > v2: > > - fix kbuild error > > > > Signed-off-by: Fugang Duan <fugang.duan@xxxxxxx> > > --- > > drivers/tty/serial/Kconfig | 18 +++++++---- > > drivers/tty/serial/Makefile | 1 + > > drivers/tty/serial/imx.c | 37 ++--------------------- > > drivers/tty/serial/imx_earlycon.c | 50 > > +++++++++++++++++++++++++++++++ > > 4 files changed, 66 insertions(+), 40 deletions(-) > > > > diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig > > index 780908d43557..dabd06ca9b66 100644 > > --- a/drivers/tty/serial/Kconfig > > +++ b/drivers/tty/serial/Kconfig > > @@ -502,20 +502,28 @@ config SERIAL_IMX > > can enable its onboard serial port by enabling this option. > > > > config SERIAL_IMX_CONSOLE > > - bool "Console on IMX serial port" > > - depends on SERIAL_IMX=y > > + tristate "Console on IMX serial port" > > + depends on SERIAL_IMX > > select SERIAL_CORE_CONSOLE > > - select SERIAL_EARLYCON if OF > > help > > If you have enabled the serial port on the Freescale IMX > > - CPU you can make it the console by answering Y to this option. > > + CPU you can make it the console by answering Y/M to this option. > > > > - Even if you say Y here, the currently visible virtual console > > + Even if you say Y/M here, the currently visible virtual > > + console > > (/dev/tty0) will still be used as the system console by default, but > > you can alter that using a kernel command line option such as > > "console=ttymxc0". (Try "man bootparam" or see the > documentation of > > your bootloader about how to pass options to the kernel at > > boot time.) > > > > +config SERIAL_IMX_EARLYCON > > + bool "Earlycon on IMX serial port" > > + depends on OF > > + select SERIAL_EARLYCON > > + default y > > Only put "default y" if you can not boot a machine without this. > Otherwise leave the default line off, it will be 'n' and can be selected if a user > wants that. > > That should be the case here, please change this. I will change it to "default n" in next version, thanks. > > thanks, > > greg k-h
