* Zachary Amsden ([email protected]) wrote:
> Yes, but unfortunately that is a nop:
>
> /*
> * Avoid unnecessary state transitions, as it confuses
> * Geode / Cyrix based boxen.
> */
> case CLOCK_EVT_MODE_SHUTDOWN:
> if (evt->mode == CLOCK_EVT_MODE_UNUSED)
> break;
> case CLOCK_EVT_MODE_UNUSED:
> if (evt->mode == CLOCK_EVT_MODE_SHUTDOWN)
> break;
This one should be fallthrough case during exchange (mode == PERIODIC)
> case CLOCK_EVT_MODE_ONESHOT:
> /* One shot setup */
> outb_p(0x38, PIT_MODE);
>
> So switching from PIT to VMI does not disable PIT timer interrupts.
> Thus I have to keep this part of the patch.
Oh, I was looking at this (x86_64 work I have here):
case CLOCK_EVT_MODE_SHUTDOWN:
case CLOCK_EVT_MODE_UNUSED:
outb_p(0x30, PIT_MODE);
outb_p(0, PIT_CH0); /* LSB */
outb_p(0, PIT_CH0); /* MSB */
break;
That's mode 0, not mode 5, but I think the end result is the same.
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