提交 ea6f3af4 编写于 作者: A Ard Biesheuvel 提交者: Rafael J. Wysocki

ACPI: GED: add support for _Exx / _Lxx handler methods

Per the ACPI spec, interrupts in the range [0, 255] may be handled
in AML using individual methods whose naming is based on the format
_Exx or _Lxx, where xx is the hex representation of the interrupt
index.

Add support for this missing feature to our ACPI GED driver.

Cc: v4.9+ <stable@vger.kernel.org> # v4.9+
Signed-off-by: NArd Biesheuvel <ardb@kernel.org>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
上级 a10660f7
......@@ -79,6 +79,8 @@ static acpi_status acpi_ged_request_interrupt(struct acpi_resource *ares,
struct resource r;
struct acpi_resource_irq *p = &ares->data.irq;
struct acpi_resource_extended_irq *pext = &ares->data.extended_irq;
char ev_name[5];
u8 trigger;
if (ares->type == ACPI_RESOURCE_TYPE_END_TAG)
return AE_OK;
......@@ -87,14 +89,28 @@ static acpi_status acpi_ged_request_interrupt(struct acpi_resource *ares,
dev_err(dev, "unable to parse IRQ resource\n");
return AE_ERROR;
}
if (ares->type == ACPI_RESOURCE_TYPE_IRQ)
if (ares->type == ACPI_RESOURCE_TYPE_IRQ) {
gsi = p->interrupts[0];
else
trigger = p->triggering;
} else {
gsi = pext->interrupts[0];
trigger = p->triggering;
}
irq = r.start;
if (ACPI_FAILURE(acpi_get_handle(handle, "_EVT", &evt_handle))) {
switch (gsi) {
case 0 ... 255:
sprintf(ev_name, "_%c%02hhX",
trigger == ACPI_EDGE_SENSITIVE ? 'E' : 'L', gsi);
if (ACPI_SUCCESS(acpi_get_handle(handle, ev_name, &evt_handle)))
break;
/* fall through */
default:
if (ACPI_SUCCESS(acpi_get_handle(handle, "_EVT", &evt_handle)))
break;
dev_err(dev, "cannot locate _EVT method\n");
return AE_ERROR;
}
......
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