Some console devices may appear or disappear at run time. In order to support such a hotplug mechanism introduce a new iomux_replace_device() helper to update the list of devices without altering environment.
Signed-off-by: Andy Shevchenko andriy.shevchenko@linux.intel.com --- common/iomux.c | 33 +++++++++++++++++++++++++++++++++ include/iomux.h | 1 + 2 files changed, 34 insertions(+)
diff --git a/common/iomux.c b/common/iomux.c index 5290b13b668b..b9088aa3b58b 100644 --- a/common/iomux.c +++ b/common/iomux.c @@ -139,4 +139,37 @@ int iomux_doenv(const int console, const char *arg) free(old_set); return 0; } + +int iomux_replace_device(const int console, const char *old, const char *new) +{ + struct stdio_dev *dev; + char *arg = NULL; /* Initial empty list */ + int size = 1; /* For NUL terminator */ + int i, ret; + + for_each_console_dev(i, console, dev) { + const char *name = strcmp(dev->name, old) ? dev->name : new; + char *tmp; + + /* Append name with a ',' (comma) separator */ + tmp = realloc(arg, size + strlen(name) + 1); + if (!tmp) { + free(arg); + return -ENOMEM; + } + + strcat(tmp, ","); + strcat(tmp, name); + + arg = tmp; + size = strlen(tmp) + 1; + } + + ret = iomux_doenv(console, arg); + if (ret) + ret = -EINVAL; + + free(arg); + return ret; +} #endif /* CONSOLE_MUX */ diff --git a/include/iomux.h b/include/iomux.h index bd4a143b1e60..37f5f6dee69f 100644 --- a/include/iomux.h +++ b/include/iomux.h @@ -31,6 +31,7 @@ extern int cd_count[MAX_FILES];
int iomux_match_device(struct stdio_dev **, const int, struct stdio_dev *); int iomux_doenv(const int, const char *); +int iomux_replace_device(const int, const char *, const char *); void iomux_printdevs(const int);
#endif /* _IO_MUX_H */