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authorPeter Hurley <peter@hurleysoftware.com>2016-01-17 02:23:39 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-02-07 09:07:37 +0300
commit2eaa790989e03900298ad24f77f1086dbbc1aebd (patch)
treeda1fa5d85a729b16c1aecaac96608d0dd1016981 /include/linux/serial_core.h
parent8477614d9f7c5ce0e871e1aa200d9060a6b8749e (diff)
downloadlinux-2eaa790989e03900298ad24f77f1086dbbc1aebd.tar.xz
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 'include/linux/serial_core.h')
-rw-r--r--include/linux/serial_core.h22
1 files changed, 13 insertions, 9 deletions
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index e03d6ba5e5b4..25e05147f379 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -342,22 +342,26 @@ struct earlycon_device {
struct earlycon_id {
char name[16];
+ char compatible[128];
int (*setup)(struct earlycon_device *, const char *options);
} __aligned(32);
+extern const struct earlycon_id __earlycon_table[];
+extern const struct earlycon_id __earlycon_table_end[];
+
+#define OF_EARLYCON_DECLARE(_name, compat, fn) \
+ static const struct earlycon_id __UNIQUE_ID(__earlycon_##_name) \
+ __used __section(__earlycon_table) \
+ = { .name = __stringify(_name), \
+ .compatible = compat, \
+ .setup = fn }
+
+#define EARLYCON_DECLARE(_name, fn) OF_EARLYCON_DECLARE(_name, "", fn)
+
extern int setup_earlycon(char *buf);
extern int of_setup_earlycon(unsigned long addr,
int (*setup)(struct earlycon_device *, const char *));
-#define EARLYCON_DECLARE(_name, func) \
- static const struct earlycon_id __earlycon_##_name \
- __used __section(__earlycon_table) \
- = { .name = __stringify(_name), \
- .setup = func }
-
-#define OF_EARLYCON_DECLARE(name, compat, fn) \
- _OF_DECLARE(earlycon, name, compat, fn, void *)
-
struct uart_port *uart_get_console(struct uart_port *ports, int nr,
struct console *c);
int uart_parse_earlycon(char *p, unsigned char *iotype, unsigned long *addr,