We have multiple "earlycon" early_param handlers - merge the DT one into
the main earlycon one. This means the earlycon early_param handler does
not just return success if no options are specified.
Signed-off-by: Leif Lindholm <leif.lindholm@xxxxxxxxxx>
---
drivers/of/fdt.c | 11 +----------
drivers/tty/serial/earlycon.c | 4 +++-
include/linux/of_fdt.h | 1 +
3 files changed, 5 insertions(+), 11 deletions(-)
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 6e82bc42..fcfc4c7 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -793,7 +793,7 @@ static inline void early_init_dt_check_for_initrd(unsigned long node)
#ifdef CONFIG_SERIAL_EARLYCON
extern struct of_device_id __earlycon_of_table[];
-static int __init early_init_dt_scan_chosen_serial(void)
+int __init early_init_dt_scan_chosen_serial(void)
{
int offset;
const char *p;
@@ -834,15 +834,6 @@ static int __init early_init_dt_scan_chosen_serial(void)
}
return -ENODEV;
}
-
-static int __init setup_of_earlycon(char *buf)
-{
- if (buf)
- return 0;
-
- return early_init_dt_scan_chosen_serial();
-}
-early_param("earlycon", setup_of_earlycon);
#endif
/**
diff --git a/drivers/tty/serial/earlycon.c b/drivers/tty/serial/earlycon.c
index f096360..2bda09a 100644
--- a/drivers/tty/serial/earlycon.c
+++ b/drivers/tty/serial/earlycon.c
@@ -17,6 +17,7 @@
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/io.h>
+#include <linux/of_fdt.h>
#include <linux/serial_core.h>
#include <linux/sizes.h>
#include <linux/mod_devicetable.h>
@@ -187,7 +188,8 @@ static int __init param_setup_earlycon(char *buf)
* don't generate a warning from parse_early_params() in that case
*/
if (!buf || !buf[0])
- return 0;
+ if (IS_ENABLED(CONFIG_OF_FLATTREE))
+ return early_init_dt_scan_chosen_serial();
err = setup_earlycon(buf);
if (err == -ENOENT || err == -EALREADY)
diff --git a/include/linux/of_fdt.h b/include/linux/of_fdt.h
index df9ef38..772c47c 100644
--- a/include/linux/of_fdt.h
+++ b/include/linux/of_fdt.h
@@ -63,6 +63,7 @@ extern int early_init_dt_scan_chosen(unsigned long node, const char *uname,
int depth, void *data);
extern int early_init_dt_scan_memory(unsigned long node, const char *uname,
int depth, void *data);
+extern int early_init_dt_scan_chosen_serial(void);
extern void early_init_fdt_scan_reserved_mem(void);
extern void early_init_fdt_reserve_self(void);
extern void early_init_dt_add_memory_arch(u64 base, u64 size);
--
2.1.4
--
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