Messages in this thread | | | Subject | Re: [PATCH v4 11/11] serial: 8250_omap: Add omap8250 earlycon | From | Peter Hurley <> | Date | Tue, 12 Jan 2016 11:51:29 -0800 |
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Wasn't planning on sending this patch just yet, but oh well.
On 01/12/2016 11:41 AM, Peter Hurley wrote: > Add DT earlycon for 8250_omap driver. This boot console is included > for kernels built with CONFIG_SERIAL_EARLYCON=y, CONFIG_OF=y, > CONFIG_SERIAL_8250_OMAP=y, and CONFIG_OF_EARLY_FLATTREE=y. > > This boot console is enabled with the command line option "earlycon" > (without "=<name>...") when the DT 'stdout-path' property matches a > compatible uart. For example, > > / { > chosen { > stdout-path = "serial0:115200"; > }; > > .... > > aliases { > serial0 = &uart0; > }; > > .... > > ocp : ocp { > uart0 : serial@44e09000 { > compatible = "ti,omap3-uart"; > } > }; > }; > > Signed-off-by: Peter Hurley <peter@hurleysoftware.com> > --- > drivers/tty/serial/8250/8250_early.c | 20 ++++++++++++++++++++ > 1 file changed, 20 insertions(+) > > diff --git a/drivers/tty/serial/8250/8250_early.c b/drivers/tty/serial/8250/8250_early.c > index e7cdc0c..d1f6310 100644 > --- a/drivers/tty/serial/8250/8250_early.c > +++ b/drivers/tty/serial/8250/8250_early.c > @@ -201,3 +201,23 @@ EARLYCON_DECLARE(rt288x, early_rt288x_setup); > OF_EARLYCON_DECLARE(rt288x, "ralink,rt2880-uart", early_rt288x_setup); > > #endif /* CONFIG_SERIAL_8250_RT288X */
This patch may not apply because the context is sitting on top of unsubmitted code. Sorry.
Regards, Peter Hurley
> + > +#ifdef CONFIG_SERIAL_8250_OMAP > + > +static int __init early_omap8250_setup(struct earlycon_device *device, > + const char *options) > +{ > + struct uart_port *port = &device->port; > + > + if (!(device->port.membase || device->port.iobase)) > + return -ENODEV; > + > + port->regshift = 2; > + device->con->write = early_serial8250_write; > + return 0; > +} > + > +OF_EARLYCON_DECLARE(omap8250, "ti,omap2-uart", early_omap8250_setup); > +OF_EARLYCON_DECLARE(omap8250, "ti,omap3-uart", early_omap8250_setup); > +OF_EARLYCON_DECLARE(omap8250, "ti,omap4-uart", early_omap8250_setup); > +#endif >
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