diff options
| -rw-r--r-- | drivers/core/uclass.c | 20 | ||||
| -rw-r--r-- | include/dm/device.h | 4 | ||||
| -rw-r--r-- | include/dm/uclass.h | 18 |
3 files changed, 42 insertions, 0 deletions
diff --git a/drivers/core/uclass.c b/drivers/core/uclass.c index 1141ce1..de602ae 100644 --- a/drivers/core/uclass.c +++ b/drivers/core/uclass.c @@ -311,6 +311,26 @@ static int uclass_find_device_by_phandle(enum uclass_id id, } #endif +int uclass_get_device_by_driver(enum uclass_id id, + const struct driver *find_drv, + struct udevice **devp) +{ + struct udevice *dev; + struct uclass *uc; + int ret; + + ret = uclass_get(id, &uc); + if (ret) + return ret; + + list_for_each_entry(dev, &uc->dev_head, uclass_node) { + if (dev->driver == find_drv) + return uclass_get_device_tail(dev, 0, devp); + } + + return -ENODEV; +} + int uclass_get_device_tail(struct udevice *dev, int ret, struct udevice **devp) { diff --git a/include/dm/device.h b/include/dm/device.h index c825d47..705849b 100644 --- a/include/dm/device.h +++ b/include/dm/device.h @@ -207,6 +207,10 @@ struct driver { #define U_BOOT_DRIVER(__name) \ ll_entry_declare(struct driver, __name, driver) +/* Get a pointer to a given driver */ +#define DM_GET_DRIVER(__name) \ + ll_entry_get(struct driver, __name, driver) + /** * dev_get_platdata() - Get the platform data for a device * diff --git a/include/dm/uclass.h b/include/dm/uclass.h index fd368b6..84f05bc 100644 --- a/include/dm/uclass.h +++ b/include/dm/uclass.h @@ -38,6 +38,7 @@ struct uclass { struct list_head sibling_node; }; +struct driver; struct udevice; /* Members of this uclass sequence themselves with aliases */ @@ -194,6 +195,23 @@ int uclass_get_device_by_phandle(enum uclass_id id, struct udevice *parent, const char *name, struct udevice **devp); /** + * uclass_get_device_by_driver() - Get a uclass device for a driver + * + * This searches the devices in the uclass for one that uses the given + * driver. Use DM_GET_DRIVER(name) for the @drv argument, where 'name' is + * the driver name - as used in U_BOOT_DRIVER(name). + * + * The device is probed to activate it ready for use. + * + * @id: ID to look up + * @drv: Driver to look for + * @devp: Returns pointer to the first device with that driver + * @return 0 if OK, -ve on error + */ +int uclass_get_device_by_driver(enum uclass_id id, const struct driver *drv, + struct udevice **devp); + +/** * uclass_first_device() - Get the first device in a uclass * * The device returned is probed if necessary, and ready for use |