[PATCH 0/3] usb: dwc2: Add Siflower SF19A2890 support

[Joseph Telaak via B4 Relay]

The Siflower SF19A2890, a MIPS SoC for home routers, has a DWC OTG 3.30a.
This series adds its compatible and parameters, and handles an
interrupt it raises without flagging it: with battery charger support
enabled, the core sets MultValIpChg in GOTGINT but not OTGINT in GINTSTS,
so the interrupt is never cleared. Chuanhong saw the line disabled with
"nobody cares"; on the GL-SFT1200 the system stalls instead (below).

The two driver patches are Chuanhong Guo's, from OpenWrt and his
SF19A2890 branch. The OTG one handled GOTGINT on every interrupt for
every core; here it does so only for cores that set the new
otg_int_unflagged parameter, which only the SF19A2890 does.

Tested on a GL.iNet GL-SFT1200 with the USB PHY driver: a USB stick
enumerates at 480 Mb/s, reads at 5.6 MB/s and comes back cleanly after
two replugs. Without patch 3, a couple of replugs leave the system
stuck, the console repeating its last message with the same timestamp
until a power cycle; no "nobody cares" message appears first.

---
Chuanhong Guo (2):
      usb: dwc2: Add Siflower SF19A2890 support
      usb: dwc2: Handle OTG interrupts that GINTSTS does not flag

Joseph Telaak (1):
      dt-bindings: usb: dwc2: Add Siflower SF19A2890

 Documentation/devicetree/bindings/usb/dwc2.yaml |  1 +
 drivers/usb/dwc2/core.h                         |  6 ++++++
 drivers/usb/dwc2/core_intr.c                    |  5 ++++-
 drivers/usb/dwc2/params.c                       | 11 +++++++++++
 4 files changed, 22 insertions(+), 1 deletion(-)
---
base-commit: 6628e7d4c6b25c8d18f1345e3a20d21829aae7e4
change-id: 20261102-sf19a2890-dwc2-87573f7cebed

Best regards,
--  
Joseph Telaak <joseph@xxxxxxxxxx>