diff options
| author |   James Hogan <james.hogan@imgtec.com> | 2015-01-29 11:14:13 +0000 |
|---|---|---|
| committer |   Ralf Baechle <ralf@linux-mips.org> | 2015-03-31 12:04:12 +0200 |
| commit | e934945db7625716f9cc469e31fc5da8666c8024 (patch) | |
| tree | ec3381a503bb92b2d40ee656e8b9b4b222add244 /drivers/tty/mips_ejtag_fdc.c | |
| parent | TTY: Add MIPS EJTAG Fast Debug Channel TTY driver (diff) | |
| download | linux-dev-e934945db7625716f9cc469e31fc5da8666c8024.tar.xz linux-dev-e934945db7625716f9cc469e31fc5da8666c8024.zip | |
MIPS, ttyFDC: Add early FDC console support
Add support for early console of MIPS Fast Debug Channel (FDC) on
channel 1 with a call very early from the MIPS setup_arch().
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/9145/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'drivers/tty/mips_ejtag_fdc.c')
| -rw-r--r-- | drivers/tty/mips_ejtag_fdc.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/tty/mips_ejtag_fdc.c b/drivers/tty/mips_ejtag_fdc.c index 51672cfe7e45..8d9bf6f90110 100644 --- a/drivers/tty/mips_ejtag_fdc.c +++ b/drivers/tty/mips_ejtag_fdc.c @@ -69,6 +69,9 @@ #define REG_FDSTAT_TXE BIT(1) /* Tx Empty */ #define REG_FDSTAT_TXF BIT(0) /* Tx Full */ +/* Default channel for the early console */ +#define CONSOLE_CHANNEL 1 + #define NUM_TTY_CHANNELS 16 #define RX_BUF_SIZE 1024 @@ -1124,3 +1127,20 @@ static int __init mips_ejtag_fdc_init_console(void) return mips_ejtag_fdc_console_init(&mips_ejtag_fdc_con); } console_initcall(mips_ejtag_fdc_init_console); + +#ifdef CONFIG_MIPS_EJTAG_FDC_EARLYCON +static struct mips_ejtag_fdc_console mips_ejtag_fdc_earlycon = { + .cons = { + .name = "early_fdc", + .write = mips_ejtag_fdc_console_write, + .flags = CON_PRINTBUFFER | CON_BOOT, + .index = CONSOLE_CHANNEL, + }, + .lock = __RAW_SPIN_LOCK_UNLOCKED(mips_ejtag_fdc_earlycon.lock), +}; + +int __init setup_early_fdc_console(void) +{ + return mips_ejtag_fdc_console_init(&mips_ejtag_fdc_earlycon); +} +#endif |