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MIPS, ttyFDC: Add early FDC console support

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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>
This commit is contained in:
James Hogan
2015-01-29 11:14:13 +00:00
committed by Ralf Baechle
parent 4cebec609a
commit e934945db7
4 changed files with 46 additions and 0 deletions
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11
arch/mips/include/asm/cdmm.h
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@@ -84,4 +84,15 @@ void mips_cdmm_driver_unregister(struct mips_cdmm_driver *);
module_driver(__mips_cdmm_driver, mips_cdmm_driver_register, \
mips_cdmm_driver_unregister)
/* drivers/tty/mips_ejtag_fdc.c */
#ifdef CONFIG_MIPS_EJTAG_FDC_EARLYCON
int setup_early_fdc_console(void);
#else
static inline int setup_early_fdc_console(void)
{
return -ENODEV;
}
#endif
#endif /* __ASM_CDMM_H */