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of/serial: move earlycon early_param handling to serial 

We have multiple "earlycon" early_param handlers - merge the DT one into
the main earlycon one.  It's a cleanup that also will be useful
to defer setting up DT console until ACPI/DT decision is made.

Rename the exported function to avoid clashing with the function from
arch/microblaze/kernel/prom.c

Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org>
Signed-off-by: Aleksey Makarov <aleksey.makarov@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
Tested-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Tested-by: Christopher Covington <cov@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Leif Lindholm 2016-09-27 23:54:12 +03:00 committed by Greg Kroah-Hartman
parent 094a32626f
commit d503187b6c
3 changed files with 5 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/of/fdt.c
View File

@ -924,7 +924,7 @@ static inline void early_init_dt_check_for_initrd(unsigned long node)
#ifdef CONFIG_SERIAL_EARLYCON
static int __init early_init_dt_scan_chosen_serial(void)
int __init early_init_dt_scan_chosen_stdout(void)
{
int offset;
const char *p, *q, *options = NULL;
@ -968,15 +968,6 @@ 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
/**

2
drivers/tty/serial/earlycon.c
View File

@ -208,7 +208,7 @@ 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;
return early_init_dt_scan_chosen_stdout();
err = setup_earlycon(buf);
if (err == -ENOENT || err == -EALREADY)

3
include/linux/of_fdt.h
View File

@ -14,6 +14,7 @@
#include <linux/types.h>
#include <linux/init.h>
#include <linux/errno.h>
/* Definitions used by the flattened device tree */
#define OF_DT_HEADER 0xd00dfeed /* marker */
@ -66,6 +67,7 @@ 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_stdout(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);
@ -94,6 +96,7 @@ extern void early_get_first_memblock_info(void *, phys_addr_t *);
extern u64 of_flat_dt_translate_address(unsigned long node);
extern void of_fdt_limit_memory(int limit);
#else /* CONFIG_OF_FLATTREE */
static inline int early_init_dt_scan_chosen_stdout(void) { return -ENODEV; }
static inline void early_init_fdt_scan_reserved_mem(void) {}
static inline void early_init_fdt_reserve_self(void) {}
static inline const char *of_flat_dt_get_machine_name(void) { return NULL; }