[PATCH v4 0/2] usb: override hub device bInterval with device

[Ikjoon Jang]

This patchset enables hard wired hub device to use different bInterval
from its descriptor when the hub has a combined device node.

When we know reducing autosuspend delay for built-in HIDs is better for
power saving, we can reduce it to the optimal value. But if a parent hub
has a long bInterval, mouse lags a lot from more frequent autosuspend.
So this enables overriding bInterval for a hard wired hub device only
when we know that reduces the power consumption.

Changes in v4
- use of_property_read_u32() instead of of_property_read_u8()

Ikjoon Jang (2):
  dt-bindings: usb: add "hub,interval" property
  usb: overridable hub bInterval by device node

 Documentation/devicetree/bindings/usb/usb-device.txt | 4 ++++
 drivers/usb/core/config.c                            | 9 +++++++++
 2 files changed, 13 insertions(+)

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2.24.0.393.g34dc348eaf-goog