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authorPeter Hurley <peter@hurleysoftware.com>2016-01-16 15:23:39 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-02-06 22:07:37 -0800
commit2eaa790989e03900298ad24f77f1086dbbc1aebd (patch)
treeda1fa5d85a729b16c1aecaac96608d0dd1016981 /drivers/of
parent8477614d9f7c5ce0e871e1aa200d9060a6b8749e (diff)
downloadlinux-2eaa790989e03900298ad24f77f1086dbbc1aebd.tar.bz2
earlycon: Use common framework for earlycon declarations
Use a single common table of struct earlycon_id for both command line and devicetree. Re-define OF_EARLYCON_DECLARE() macro to instance a unique earlycon declaration (the declaration is only guaranteed to be unique within a compilation unit; separate compilation units must still use unique earlycon names). The semantics of OF_EARLYCON_DECLARE() is different; it declares an earlycon which can matched either on the command line or by devicetree. EARLYCON_DECLARE() is semantically unchanged; it declares an earlycon which is matched by command line only. Remove redundant instances of EARLYCON_DECLARE(). This enables all earlycons to properly initialize struct console with the appropriate name and index, which improves diagnostics and enables direct earlycon-to-console handoff. Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/of')
-rw-r--r--drivers/of/fdt.c14
1 files changed, 7 insertions, 7 deletions
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 655f79db7899..168611867611 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -796,14 +796,13 @@ static inline void early_init_dt_check_for_initrd(unsigned long node)
#endif /* CONFIG_BLK_DEV_INITRD */
#ifdef CONFIG_SERIAL_EARLYCON
-extern struct of_device_id __earlycon_of_table[];
static int __init early_init_dt_scan_chosen_serial(void)
{
int offset;
const char *p;
int l;
- const struct of_device_id *match = __earlycon_of_table;
+ const struct earlycon_id *match;
const void *fdt = initial_boot_params;
offset = fdt_path_offset(fdt, "/chosen");
@@ -826,19 +825,20 @@ static int __init early_init_dt_scan_chosen_serial(void)
if (offset < 0)
return -ENODEV;
- while (match->compatible[0]) {
+ for (match = __earlycon_table; match < __earlycon_table_end; match++) {
u64 addr;
- if (fdt_node_check_compatible(fdt, offset, match->compatible)) {
- match++;
+ if (!match->compatible[0])
+ continue;
+
+ if (fdt_node_check_compatible(fdt, offset, match->compatible))
continue;
- }
addr = fdt_translate_address(fdt, offset);
if (addr == OF_BAD_ADDR)
return -ENXIO;
- of_setup_earlycon(addr, match->data);
+ of_setup_earlycon(addr, match->setup);
return 0;
}
return -ENODEV;