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Some MCUs (e.g. the STM32F3) directly expose the internal reset line to an external pin. When this signal is driven by a push/pull line, it can actually be inhibited by the external driver. This results in a setup where the MCU cannot reset itself, for example, by a watchdog timeout or a sysreset request. To fix this condition, support for open drain output on the SRST line is required. Note that because `reset_config srst_open_drain` is the default, all users of this adapter will switch over to an open drain output unless explicitly configured otherwise. Signed-off-by: Alex Crawford <openocd@code.acrawford.com> Change-Id: I89b39b03aa03f826ed3c45793412780448940bcc Reviewed-on: https://review.openocd.org/c/openocd/+/6559 Tested-by: jenkins Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>