Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-23 12:42:02 +00:00
Code Issues Packages Projects Releases Wiki Activity

serial: core: Handle serial console options

Browse Source 
In order to start moving the serial console quirks out of console_setup(),
let's add parsing for the quirks to the serial core layer. We can use
serial_base_add_one_prefcon() to handle the quirks.

Note that eventually we may want to set up driver specific console quirk
handling for the serial port device drivers to use. But we need to figure
out which driver(s) need to call the quirk. So for now, we just handle the
sparc quirk directly.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Link: https://lore.kernel.org/r/20240327110021.59793-6-tony@atomide.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tony Lindgren 2024-03-27 12:59:39 +02:00 committed by Greg Kroah-Hartman
parent 787a1cabac
commit a0f32e2dd9
1 changed files with 49 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

49
drivers/tty/serial/serial_base_bus.c
View File

@ -219,9 +219,58 @@ static int serial_base_add_one_prefcon(const char *match, const char *dev_name,
return ret;
}
#ifdef __sparc__
/* Handle Sparc ttya and ttyb options as done in console_setup() */
static int serial_base_add_sparc_console(const char *dev_name, int idx)
{
const char *name;
switch (idx) {
case 0:
name = "ttya";
break;
case 1:
name = "ttyb";
break;
default:
return 0;
}
return serial_base_add_one_prefcon(name, dev_name, idx);
}
#else
static inline int serial_base_add_sparc_console(const char *dev_name, int idx)
{
return 0;
}
#endif
static int serial_base_add_prefcon(const char *name, int idx)
{
const char *char_match __free(kfree) = NULL;
const char *nmbr_match __free(kfree) = NULL;
int ret;
/* Handle ttyS specific options */
if (strstarts(name, "ttyS")) {
/* No name, just a number */
nmbr_match = kasprintf(GFP_KERNEL, "%i", idx);
if (!nmbr_match)
return -ENODEV;
ret = serial_base_add_one_prefcon(nmbr_match, name, idx);
if (ret)
return ret;
/* Sparc ttya and ttyb */
ret = serial_base_add_sparc_console(name, idx);
if (ret)
return ret;
}
/* Handle the traditional character device name style console=ttyS0 */
char_match = kasprintf(GFP_KERNEL, "%s%i", name, idx);