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): arm: dts: rockchip: rk3399: usb: ehci: Fix EHCI probe in rk3399 to access peripherals by USB 2. arm: rk3399: usb2phy: phy-rockchip-inno-usb2.c: Implement operations for the 480MHz usb2phy clock in rk3399.
drivers/phy/rockchip/phy-rockchip-inno-usb2.c | 97 ++++++++++++++++++- 1 file changed, 96 insertions(+), 1 deletion(-)
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
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Changes:
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).