712b3a0b22
The firmware corresponding to a device (dev.fwnode) might be able to provide functional dependency information between a device and its supplier and consumer devices. Tracking this functional dependency allows optimizing device probe order and informing a supplier when all its consumers have probed (and thereby actively managing their resources). The existing device links feature allows tracking and using supplier-consumer relationships. So, this patch adds the add_links() fwnode callback to allow firmware to create device links for each device as the device is added. However, when consumer devices are added, they might not have a supplier device to link to despite needing mandatory resources/functionality from one or more suppliers. A waiting_for_suppliers list is created to track such consumers and retry linking them when new devices get added. Signed-off-by: Saravana Kannan <saravanak@google.com> Link: https://lore.kernel.org/r/20190904211126.47518-3-saravanak@google.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> (cherry-picked from commit e2ae9bcc4aaacda04edb75c4eea93384719efaa5 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git driver-core-next) Change-Id: I97ffa57fa71588bf198e78d8b5a313b860b17bf5 |
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| .. | ||
| 80211 | ||
| dmaengine | ||
| firmware | ||
| fpga | ||
| gpio | ||
| iio | ||
| pm | ||
| soundwire | ||
| usb | ||
| basics.rst | ||
| clk.rst | ||
| conf.py | ||
| device-io.rst | ||
| device_connection.rst | ||
| device_link.rst | ||
| dma-buf.rst | ||
| edac.rst | ||
| frame-buffer.rst | ||
| hsi.rst | ||
| i2c.rst | ||
| index.rst | ||
| infrastructure.rst | ||
| input.rst | ||
| libata.rst | ||
| message-based.rst | ||
| misc_devices.rst | ||
| miscellaneous.rst | ||
| mtdnand.rst | ||
| pci.rst | ||
| pinctl.rst | ||
| rapidio.rst | ||
| regulator.rst | ||
| s390-drivers.rst | ||
| scsi.rst | ||
| slimbus.rst | ||
| sound.rst | ||
| spi.rst | ||
| target.rst | ||
| uio-howto.rst | ||
| vme.rst | ||
| w1.rst | ||