In Cyclone 5 SoC platform, the first USB probing is failed but second probing is success. DWC2 driver read gsnpsid register right after de-assert reset, but controller is not ready yet and it returns gsnpsid 0. Polling reset status after de-assert reset to solve the issue.
This patchset also add .rst_status callback function to reset-socfpga driver to support this get reset status feature.
v1->v2: - Change from constant delay to poll for reset status; - Add reset status callback function.
History: v1: https://patchwork.ozlabs.org/patch/1214841/
Ley Foon Tan (2): reset: socfpga: Add reset status callback function usb: dwc2: Add polling for reset status
drivers/reset/reset-socfpga.c | 12 ++++++++++++ drivers/usb/host/dwc2.c | 10 +++++++++- 2 files changed, 21 insertions(+), 1 deletion(-)