diff options
| -rw-r--r-- | drivers/acpi/scan.c | 57 | ||||
| -rw-r--r-- | include/linux/acpi.h | 15 |
2 files changed, 72 insertions, 0 deletions
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index c92532158195..680bb5647701 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -116,6 +116,63 @@ static int create_modalias(struct acpi_device *acpi_dev, char *modalias, return len; } +/* + * Creates uevent modalias field for ACPI enumerated devices. + * Because the other buses does not support ACPI HIDs & CIDs. + * e.g. for a device with hid:IBM0001 and cid:ACPI0001 you get: + * "acpi:IBM0001:ACPI0001" + */ +int acpi_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env) +{ + struct acpi_device *acpi_dev; + int len; + + acpi_dev = ACPI_COMPANION(dev); + if (!acpi_dev) + return -ENODEV; + + /* Fall back to bus specific way of modalias exporting */ + if (list_empty(&acpi_dev->pnp.ids)) + return -ENODEV; + + if (add_uevent_var(env, "MODALIAS=")) + return -ENOMEM; + len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], + sizeof(env->buf) - env->buflen); + if (len <= 0) + return len; + env->buflen += len; + return 0; +} +EXPORT_SYMBOL_GPL(acpi_device_uevent_modalias); + +/* + * Creates modalias sysfs attribute for ACPI enumerated devices. + * Because the other buses does not support ACPI HIDs & CIDs. + * e.g. for a device with hid:IBM0001 and cid:ACPI0001 you get: + * "acpi:IBM0001:ACPI0001" + */ +int acpi_device_modalias(struct device *dev, char *buf, int size) +{ + struct acpi_device *acpi_dev; + int len; + + acpi_dev = ACPI_COMPANION(dev); + if (!acpi_dev) + return -ENODEV; + + /* Fall back to bus specific way of modalias exporting */ + if (list_empty(&acpi_dev->pnp.ids)) + return -ENODEV; + + len = create_modalias(acpi_dev, buf, size -1); + if (len <= 0) + return len; + buf[len++] = '\n'; + return len; +} +EXPORT_SYMBOL_GPL(acpi_device_modalias); + static ssize_t acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { struct acpi_device *acpi_dev = to_acpi_device(dev); diff --git a/include/linux/acpi.h b/include/linux/acpi.h index d9099b15b472..22325ed24139 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -409,6 +409,9 @@ static inline bool acpi_driver_match_device(struct device *dev, return !!acpi_match_device(drv->acpi_match_table, dev); } +int acpi_device_uevent_modalias(struct device *, struct kobj_uevent_env *); +int acpi_device_modalias(struct device *, char *, int); + #define ACPI_PTR(_ptr) (_ptr) #else /* !CONFIG_ACPI */ @@ -488,6 +491,18 @@ static inline bool acpi_driver_match_device(struct device *dev, return false; } +static inline int acpi_device_uevent_modalias(struct device *dev, + struct kobj_uevent_env *env) +{ + return -ENODEV; +} + +static inline int acpi_device_modalias(struct device *dev, + char *buf, int size) +{ + return -ENODEV; +} + #define ACPI_PTR(_ptr) (NULL) #endif /* !CONFIG_ACPI */ |