Hi All,
As per USB 2.0 specification(Section 11.12.5 Over-current Reporting
and Recovery):
When a hub experiences an over-current condition, it must place all
affected ports in the Powered-off state.
It does not specify whether this action is to be done by hardware or software.
I am working with controller where it expects port power off to be
done by software in case of overcurrent detection interrupt.
So , implementation would be something like:
if (hubchange & HUB_CHANGE_OVERCURRENT) {
dev_dbg (hub_dev, "overcurrent change\n");
hub_power_off(hub);
msleep(500); /* Cool down */
clear_hub_feature(hdev, C_HUB_OVER_CURRENT);
hub_power_on(hub, true);
}
Is this implementation correct?
We are in the process to submit patches for the support of this
pltaform into main line linux.
Regards
Pratyush
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