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| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2014-12-18 20:47:12 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-01-10 01:10:46 +0300 |
| commit | 00648d0282dcca1da453c0b20d27e24bf901a854 (patch) | |
| tree | 4ddbba3cd0ef465d22b2cb58ab6535597aba6402 /drivers/tty/serial/8250/8250_omap.c | |
| parent | 201d8975ae5ada760bf29edd837da039f494709a (diff) | |
| download | linux-00648d0282dcca1da453c0b20d27e24bf901a854.tar.xz | |
tty: serial: 8250: omap: add ttySx console if the user didn't
This patch invokes add_preferred_console() with ttyS based on ttyO
arguments if the user didn't specify it on its own. This ensures that
the user will see the kernel booting on his serial console in case he
forgot to update the command line.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/8250/8250_omap.c')
| -rw-r--r-- | drivers/tty/serial/8250/8250_omap.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/drivers/tty/serial/8250/8250_omap.c b/drivers/tty/serial/8250/8250_omap.c index 96b69bfd773f..273f37c6b493 100644 --- a/drivers/tty/serial/8250/8250_omap.c +++ b/drivers/tty/serial/8250/8250_omap.c @@ -1248,6 +1248,46 @@ static int omap8250_runtime_resume(struct device *dev) } #endif +#ifdef CONFIG_SERIAL_8250_OMAP_TTYO_FIXUP +static int __init omap8250_console_fixup(void) +{ + char *omap_str; + char *options; + u8 idx; + + if (strstr(boot_command_line, "console=ttyS")) + /* user set a ttyS based name for the console */ + return 0; + + omap_str = strstr(boot_command_line, "console=ttyO"); + if (!omap_str) + /* user did not set ttyO based console, so we don't care */ + return 0; + + omap_str += 12; + if ('0' <= *omap_str && *omap_str <= '9') + idx = *omap_str - '0'; + else + return 0; + + omap_str++; + if (omap_str[0] == ',') { + omap_str++; + options = omap_str; + } else { + options = NULL; + } + + add_preferred_console("ttyS", idx, options); + pr_err("WARNING: Your 'console=ttyO%d' has been replaced by 'ttyS%d'\n", + idx, idx); + pr_err("This ensures that you still see kernel messages. Please\n"); + pr_err("update your kernel commandline.\n"); + return 0; +} +console_initcall(omap8250_console_fixup); +#endif + static const struct dev_pm_ops omap8250_dev_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(omap8250_suspend, omap8250_resume) SET_RUNTIME_PM_OPS(omap8250_runtime_suspend, |