diff options
| -rw-r--r-- | src/device/device_const.c | 24 | ||||
| -rw-r--r-- | src/include/device/device.h | 3 |
2 files changed, 27 insertions, 0 deletions
diff --git a/src/device/device_const.c b/src/device/device_const.c index ee64bd13e6..90b68679e9 100644 --- a/src/device/device_const.c +++ b/src/device/device_const.c @@ -216,3 +216,27 @@ DEVTREE_CONST struct device *dev_find_slot_pnp(u16 port, u16 device) } return 0; } + +/** + * Given a device and previous match iterate through all the children. + * + * @param bus parent device's bus holding all the children + * @param prev_child previous child already traversed, if NULL start at + * children of parent bus. + * @return pointer to child or NULL when no more children + */ +DEVTREE_CONST struct device *dev_bus_each_child(const struct bus *parent, + DEVTREE_CONST struct device *prev_child) +{ + DEVTREE_CONST struct device *dev; + + if (parent == NULL) + return NULL; + + if (prev_child == NULL) + dev = parent->children; + else + dev = prev_child->sibling; + + return dev; +} diff --git a/src/include/device/device.h b/src/include/device/device.h index 64add5dc1b..1c8f1db3c0 100644 --- a/src/include/device/device.h +++ b/src/include/device/device.h @@ -1,4 +1,5 @@ #ifndef DEVICE_H + #define DEVICE_H /* @@ -275,6 +276,8 @@ DEVTREE_CONST struct device *dev_find_next_pci_device( DEVTREE_CONST struct device *dev_find_slot_on_smbus(unsigned int bus, unsigned int addr); DEVTREE_CONST struct device *dev_find_slot_pnp(u16 port, u16 device); +DEVTREE_CONST struct device *dev_bus_each_child(const struct bus *parent, + DEVTREE_CONST struct device *prev_child); void scan_smbus(struct device *bus); void scan_generic_bus(struct device *bus); |