- snps,tx_de_emphasis: the value driven to the PHY is controlled by the
LTSSM during USB3 Compliance mode.
- snps,dis_u3_susphy_quirk: when set core will disable USB3 suspend phy.
+ - snps,dis_u2_susphy_quirk: when set core will disable USB2 suspend phy.
+ - snps,is-utmi-l1-suspend: true when DWC3 asserts output signal
+ utmi_l1_suspend_n, false when asserts utmi_sleep_n
+ - snps,hird-threshold: HIRD threshold
This is usually a subnode to DWC3 glue to which it is connected.