** Changed in: linux-riscv (Ubuntu)
Assignee: (unassigned) => Emil Renner Berthing (esmil)
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https://bugs.launchpad.net/bugs/1986970
Title:
PolarFire Icicle Kit: missing USB support
Status in linux-riscv package in Ubuntu:
New
Bug description:
[Impact]
The 5.19 kernel contains support for the PolarFire Icicle board but
the USB driver is missing.
The following patches are available in Linux v6.0-rc1 and are
sufficient to make USB usable on the PolarFire Icicle board. Please,
apply them to the 5.19 kernel and set CONFIG_USB_MUSB_POLARFIRE_SOC=m.
7a96b6ea90a4 ("usb: musb: Add support for PolarFire SoC's musb controller")
https://lore.kernel.org/r/20220613114642.1615292-2-conor.doo...@microchip.com
21cdd6a0e844 ("usb: musb: mpfs: Fix error codes in probe()")
https://lore.kernel.org/r/YrVmLEc/FOEzNdzj@kili
98ceba755928 ("usb: musb: mpfs: add missing clk_disable_unprepare() in
mpfs_remove()"
https://lore.kernel.org/all/YrVmLEc%2FFOEzNdzj@kili/
With this change internal USB devices are fully usable. External
devices are supported with the following Jumper settings:
* J17 closed
* J15 open
[Test Plan]
Ensure the correct jumper settings:
* J17 closed
* J15 open
Use the SiFive Unmatched preinstalled image and install the 5.19
kernel. Try to boot on the Polarfire Icicle board.
* Run lsusb.
* Attach a USB device to J16 (USB port beside SD-card slot)
* Run lsusb again. The new device appears.
[Where problems could occur]
The fix only concerns a board which has been unsupported by Ubuntu
yet.
In case of an incorrect fix the board might not boot or otherwise
malfunction.
Best regards
Heinrich
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