This patch series introduces full support for the Amlogic A1 USB controller
in OTG mode (peripheral and host modes switching).
Previously, Amlogic's patch series [1] was applied to the upstream tree,
but it only had USB host mode support.
Furthermore, the device tree patchset [2] wasn't merged due to a missing
clk driver.
Patchset [2] has been completely reworked:
- changed register base offsets to proper values
- introduced dwc2 in peripheral mode
- OTG mode support
- the SoB of Amlogic authors still remain
Testing:
- USB OTG role switching between gadget and host - OK
- Peripheral mode - OK (tested with adb shell/push/pop)
- Host mode - OK (tested only USB enumeration and detection)
Changes v3 since v2 at [4]:
- if reset_control_reset() fails during phy_exit() callback
execution, do not disable clkin, instead, return an error
immediately
- provide proper 'phy-names' for the dwc2 device tree node as
'usb2-phy' instead of 'usb2_phy' (replace underscore with dash)
Changes v2 since v1 at [3]:
- as Martin suggested in v1, this commit completely removes
the 'otg_switch_supported' parameter from dwc3_meson_g12a_drvdata;
this parameter is no longer necessary as all IP versions now
support OTG switching
- this commit moves the USB PHY clkin enable/disable calls to
the PHY init/exit routines
Links:
[1] https://lore.kernel.org/all/1581990859-135234-1-git-send-email-hanjie.lin@xxxxxxxxxxx/
[2] https://lore.kernel.org/all/1581990859-135234-4-git-send-email-hanjie.lin@xxxxxxxxxxx/
[3] https://lore.kernel.org/all/20230414152423.19842-1-ddrokosov@xxxxxxxxxxxxxx/
[4] https://lore.kernel.org/all/20230418111612.19479-1-ddrokosov@xxxxxxxxxxxxxx/
Dmitry Rokosov (5):
phy: amlogic: enable/disable clkin during Amlogic USB PHY init/exit
usb: dwc2: support dwc2 IP for Amlogic A1 SoC family
dt-bindings: usb: dwc2: add support for Amlogic A1 SoC USB peripheral
usb: dwc3-meson-g12a: support OTG switch for all IP versions
arm64: dts: meson: a1: support USB controller in OTG mode
.../devicetree/bindings/usb/dwc2.yaml | 1 +
arch/arm64/boot/dts/amlogic/meson-a1.dtsi | 59 +++++++++++++++++++
drivers/phy/amlogic/phy-meson-g12a-usb2.c | 15 ++++-
drivers/usb/dwc2/params.c | 21 +++++++
drivers/usb/dwc3/dwc3-meson-g12a.c | 16 +----
5 files changed, 97 insertions(+), 15 deletions(-)
--
2.36.0
