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Try to switch pin from ACPI Mode to GPIO Driver Mode #15

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Jun 26, 2023
Merged

Try to switch pin from ACPI Mode to GPIO Driver Mode #15

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11 changes: 11 additions & 0 deletions VoodooGPIO/VoodooGPIOIntel.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -150,6 +150,17 @@ bool VoodooGPIOIntel::intel_pad_acpi_mode(unsigned pin) {
offset = community->hostown_offset + padgrp->reg_num * 4;
hostown = community->regs + offset;

UInt32 hostownval = readl(hostown);
if ((hostownval & BIT(gpp_offset)) == 0) {
IOLog("%s::Pin owned by ACPI...Attempting to take ownership\n", getName());

hostownval |= BIT(gpp_offset);
writel(hostownval, hostown);
} else {
return false;
}

// Second read to double check we actually got ownership
return !(readl(hostown) & BIT(gpp_offset));
}

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