[PATCH 5/8] serial: imx: add $global.bootm.earlycon fixup support

[Sascha Hauer]

On Mon, May 23, 2022 at 01:10:13PM +0200, Ahmad Fatoum wrote:
> Hi,
> 
> On 23.05.22 13:04, Sascha Hauer wrote:
> > On Mon, May 23, 2022 at 11:25:23AM +0200, Ahmad Fatoum wrote:
> >> Allow barebox compute a suitable earlycon parameter.
> >>
> >> Signed-off-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
> >> ---
> >>  drivers/serial/serial_imx.c | 2 ++
> >>  1 file changed, 2 insertions(+)
> >>
> >> diff --git a/drivers/serial/serial_imx.c b/drivers/serial/serial_imx.c
> >> index 6a933c930e9b..cf9c3f02a7ef 100644
> >> --- a/drivers/serial/serial_imx.c
> >> +++ b/drivers/serial/serial_imx.c
> >> @@ -234,6 +234,8 @@ static int imx_serial_probe(struct device_d *dev)
> >>  	cdev->flush = imx_serial_flush;
> >>  	cdev->setbrg = imx_serial_setbaudrate;
> >>  	cdev->linux_console_name = "ttymxc";
> >> +	cdev->linux_earlycon_name = "ec_imx6q";
> > 
> > "ec_imx6q" sounds wrong for the older i.MX SoCs. I don't know how
> > OF_EARLYCON_DECLARE works, but this:
> > 
> > OF_EARLYCON_DECLARE(ec_imx6q, "fsl,imx6q-uart", imx_console_early_setup);
> > OF_EARLYCON_DECLARE(ec_imx21, "fsl,imx21-uart", imx_console_early_setup);
> > 
> > looks like it matches a device tree compatible entry. For the older SoCs
> > you should likely use "ec_imx21".
> 
> Oh, I can fix this for v2.
> 
> > Anyway, plain "earlycon" just works, why the hassle?
> 
> Not all boards have a DT with stdout-path or probe from device tree.
> I ran into this issue three times now (twice DT-enabled boards, but no
> stdout-path, once on x86 with no DT) and figured it would be nifty
> if barebox could just optionally generate it.

Can't we set the stdout-path property in barebox?

Sascha

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