Re: [PATCH v4 11/11] serial: 8250_omap: Add omap8250 earlycon
From: Peter Hurley <hidden>
Date: 2016-01-12 19:51:35
Also in:
lkml
Wasn't planning on sending this patch just yet, but oh well. On 01/12/2016 11:41 AM, Peter Hurley wrote:
quoted hunk ↗ jump to hunk
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 <redacted> --- 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