On 2018-06-23 01:23, Wang, Haiyue wrote:
Maybe it's best to have the interrupt disabled unless the device is
open.
You have to handle the interrupt disable race on a close, but with the
sync functions that shouldn't be too hard.
In fact, in BMC chip design, the LPC controller has many devices, such as
Port 80 snoop, BT, KCS etc, they shares the same interrupt. :)
BTW, for AST2500, if the BMC and PCH run under eSPI (like LPC) mode, and
if we
disable the KCS devices, then reboot the BMC, it will cause the system
hang, and
the KCS channel can't be used anymore. So we need always enable these
used KCS
devices (keep the KCS enable register setting) for working well under
eSPI mode.
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