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of: earlycon: Add options string handling

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Pass-through any options string in the 'stdout-path' property to the
earlycon "driver" setup.

Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Hurley
2016-01-16 15:23:42 -08:00
committed by Greg Kroah-Hartman
parent 05d961320b
commit 4d118c9a86
3 changed files with 15 additions and 8 deletions
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11
drivers/of/fdt.c
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@@ -800,7 +800,7 @@ static inline void early_init_dt_check_for_initrd(unsigned long node)
static int __init early_init_dt_scan_chosen_serial(void)
{
int offset;
const char *p;
const char *p, *q, *options = NULL;
int l;
const struct earlycon_id *match;
const void *fdt = initial_boot_params;
@@ -817,11 +817,12 @@ static int __init early_init_dt_scan_chosen_serial(void)
if (!p || !l)
return -ENOENT;
/* Remove console options if present */
l = strchrnul(p, ':') - p;
q = strchrnul(p, ':');
if (*q != '\0')
options = q + 1;
/* Get the node specified by stdout-path */
offset = fdt_path_offset_namelen(fdt, p, l);
offset = fdt_path_offset_namelen(fdt, p, q - p);
if (offset < 0)
return -ENODEV;
@@ -838,7 +839,7 @@ static int __init early_init_dt_scan_chosen_serial(void)
if (addr == OF_BAD_ADDR)
return -ENXIO;
of_setup_earlycon(addr, match);
of_setup_earlycon(addr, match, options);
return 0;
}
return -ENODEV;