2 Commits (9e8fb293edd59f355cc1fd020f96dafee0af867c)

Author	SHA1	Message	Date
Benjamin Herrenschmidt	3b603402d2	soc_reset: Use counters, add synchronizers ... In some cases we need to keep the reset held for much longer, so use counters rather than shift registers. Additionally, some signals such as ext_rst and pll_locked or signals going from the ext_clk domain to the pll_clk domain need to be treated as async, and testing them without synchronizers is asking for trouble. Finally, make the external reset also reset the PLL. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>	5 years ago
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