diff options
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/sys.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/drivers/base/sys.c b/drivers/base/sys.c index dc7dace14e1..40fc14f0354 100644 --- a/drivers/base/sys.c +++ b/drivers/base/sys.c @@ -479,3 +479,52 @@ int __init system_bus_init(void) EXPORT_SYMBOL_GPL(sysdev_register); EXPORT_SYMBOL_GPL(sysdev_unregister); + +#define to_ext_attr(x) container_of(x, struct sysdev_ext_attribute, attr) + +ssize_t sysdev_store_ulong(struct sys_device *sysdev, + struct sysdev_attribute *attr, + const char *buf, size_t size) +{ + struct sysdev_ext_attribute *ea = to_ext_attr(attr); + char *end; + unsigned long new = simple_strtoul(buf, &end, 0); + if (end == buf) + return -EINVAL; + *(unsigned long *)(ea->var) = new; + return end - buf; +} +EXPORT_SYMBOL_GPL(sysdev_store_ulong); + +ssize_t sysdev_show_ulong(struct sys_device *sysdev, + struct sysdev_attribute *attr, + char *buf) +{ + struct sysdev_ext_attribute *ea = to_ext_attr(attr); + return snprintf(buf, PAGE_SIZE, "%lx\n", *(unsigned long *)(ea->var)); +} +EXPORT_SYMBOL_GPL(sysdev_show_ulong); + +ssize_t sysdev_store_int(struct sys_device *sysdev, + struct sysdev_attribute *attr, + const char *buf, size_t size) +{ + struct sysdev_ext_attribute *ea = to_ext_attr(attr); + char *end; + long new = simple_strtol(buf, &end, 0); + if (end == buf || new > INT_MAX || new < INT_MIN) + return -EINVAL; + *(int *)(ea->var) = new; + return end - buf; +} +EXPORT_SYMBOL_GPL(sysdev_store_int); + +ssize_t sysdev_show_int(struct sys_device *sysdev, + struct sysdev_attribute *attr, + char *buf) +{ + struct sysdev_ext_attribute *ea = to_ext_attr(attr); + return snprintf(buf, PAGE_SIZE, "%d\n", *(int *)(ea->var)); +} +EXPORT_SYMBOL_GPL(sysdev_show_int); + |