Hi,
I am looking at a custom card that contains :
- PCIE device that is connected via PCIE bus
- ID PROM that contains power required by the card. ID PROM will be connected via I2C bus.
>From the software side, I should not power on the card if it exceeds the power budget (in both cold plug and hotplug cases)
While looking at acpiphp, I see that this driver automatically powers on the card on HTML clipboardACPI_NOTIFY_BUS_CHECK event.
- HTML clipboard re-enumerate the bus
-- for each slot in the bridge
--- if slot is not enabled, power on the slot and enable the PCI functions on the card.
I wonder where I can add the functionality of reading the IDPROM for power requirement and then tell acpiphp to run on power ?
Will the scheme work in cold plug case (is acpiphp involved in cold plug case) ?
Also is it possible to do this custom functionality in user space and tell acpiphp to continue with its functionality of powering on and enabling PCI functions?
Thanks much.
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