microwatt

Commit Graph

Author	SHA1	Message	Date
Anton Blanchard	03fd06deaf	Rework SOC reset The old reset code was overly complicated and never worked properly. Replace it with a simpler sequence that uses a couple of shift registers to assert resets: - Wait a number of external clock cycles before removing reset from the PLL. - After the PLL locks and the external reset button isn't pressed, wait a number of PLL clock cycles before removing reset from the SOC. Signed-off-by: Anton Blanchard <anton@linux.ibm.com>	5 years ago

Author

SHA1

Message

Date

Anton Blanchard

03fd06deaf

Rework SOC reset

The old reset code was overly complicated and never worked properly.
Replace it with a simpler sequence that uses a couple of shift registers
to assert resets:

- Wait a number of external clock cycles before removing reset from
  the PLL.

- After the PLL locks and the external reset button isn't pressed,
  wait a number of PLL clock cycles before removing reset from the SOC.

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>

1 Commits (ace1d32ddb511d88b0504801f2f09198b5b43bf3)