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stdio: Provide functions to add/remove devices using stdio_dev 

The current functions for adding and removing devices require a device name.
This is not convenient for driver model, which wants to store a pointer to
the relevant device. Add new functions which provide this feature and adjust
the old ones to call these.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2014-07-23 06:55:05 -06:00
parent ab7cd62790
commit d97143a67c
2 changed files with 26 additions and 8 deletions
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32
common/stdio.c
View File

@ -11,6 +11,7 @@
#include <config.h>
#include <common.h>
#include <errno.h>
#include <stdarg.h>
#include <malloc.h>
#include <stdio_dev.h>
@ -148,32 +149,35 @@ struct stdio_dev* stdio_clone(struct stdio_dev *dev)
return _dev;
}
int stdio_register (struct stdio_dev * dev)
int stdio_register_dev(struct stdio_dev *dev, struct stdio_dev **devp)
{
struct stdio_dev *_dev;
_dev = stdio_clone(dev);
if(!_dev)
return -1;
return -ENODEV;
list_add_tail(&(_dev->list), &(devs.list));
if (devp)
*devp = _dev;
return 0;
}
int stdio_register(struct stdio_dev *dev)
{
return stdio_register_dev(dev, NULL);
}
/* deregister the device "devname".
* returns 0 if success, -1 if device is assigned and 1 if devname not found
*/
#ifdef CONFIG_SYS_STDIO_DEREGISTER
int stdio_deregister(const char *devname)
int stdio_deregister_dev(struct stdio_dev *dev)
{
int l;
struct list_head *pos;
struct stdio_dev *dev;
char temp_names[3][16];
dev = stdio_get_by_name(devname);
if(!dev) /* device not found */
return -1;
/* get stdio devices (ListRemoveItem changes the dev list) */
for (l=0 ; l< MAX_FILES; l++) {
if (stdio_devices[l] == dev) {
@ -197,6 +201,18 @@ int stdio_deregister(const char *devname)
}
return 0;
}
int stdio_deregister(const char *devname)
{
struct stdio_dev *dev;
dev = stdio_get_by_name(devname);
if (!dev) /* device not found */
return -ENODEV;
return stdio_deregister_dev(dev);
}
#endif /* CONFIG_SYS_STDIO_DEREGISTER */
int stdio_init (void)

2
include/stdio_dev.h
View File

@ -77,10 +77,12 @@ extern char *stdio_names[MAX_FILES];
* PROTOTYPES
*/
int stdio_register (struct stdio_dev * dev);
int stdio_register_dev(struct stdio_dev *dev, struct stdio_dev **devp);
int stdio_init (void);
void stdio_print_current_devices(void);
#ifdef CONFIG_SYS_STDIO_DEREGISTER
int stdio_deregister(const char *devname);
int stdio_deregister_dev(struct stdio_dev *dev);
#endif
struct list_head* stdio_get_list(void);
struct stdio_dev* stdio_get_by_name(const char* name);