[PATCH v7 0/2] arm: dts: rockchip: rk3399: usb: ehci: Fix EHCI probe in rk3399 to access peripherals by USB 2

[Xavier Drudis Ferran <xdrudis@tinet.cat>]

EHCI probing in Rock pi 4 currently fails. 

Add a clock driver for usb2phy so that probing EHCI does not fail when
missing one of the clocks in the bundle for usb_host0_ehci, since
usb2phy is UCLASS_PHY but not UCLASS_CLK.

Xavier Drudis Ferran (2):
  phy: rockchip-inno-usb2: Add usb2phy clock provider of 480MHz clock
  phy: rockchip-inno-usb2: Implement clock operations for usb2phy clock

 drivers/phy/rockchip/phy-rockchip-inno-usb2.c | 109 +++++++++++++++++-
 1 file changed, 106 insertions(+), 3 deletions(-)

Cc: Simon Glass <sjg@chromium.org>
Cc: Philipp Tomsich <philipp.tomsich@vrull.eu>
Cc: Kever Yang <kever.yang@rock-chips.com>
Cc: Lukasz Majewski <lukma@denx.de>
Cc: Sean Anderson <seanga2@gmail.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Christoph Fritz <chf.fritz@googlemail.com>
Cc: Jagan Teki <jagan@amarulasolutions.com>
Signed-off-by: Xavier Drudis Ferran <xdrudis@tinet.cat>

---

   Changes:

   v7: Error handling. Remove unnecessary if.
       Adding config data for rk3568 (untested).

   v6: just retested over current next branch and some corrections
       to message and headers
       (no changes to code).

   v5: fixes a bug that Christoph Fritz discovered, consisting in the
       wrong eror code returned when enabling or disabling the clock
       because property_enable() returns an error code in linux but
       the modified register value in U-Boot. This caused the clk
       disable to abort before freeing the clock.

   v4: move v3 to one patch in the series and add a second patch
       to add operations to enable disable the usb2phy 480Mhz clock.
       Also, honour clock-output-names for what is worth.

   v3: implement option 5 (bind usb2phy as a clk driver too) instead
       of option 1 (ehci-generic.c tolerates missing clocks).

   v2: implement option 1 (ehci-generic.c tolerates missing clocks)
      instead of option 3 (change dts node to remove the missing
      clock).

-- 
2.20.1