forked from Minki/linux
8661423eea
acpi_dev_found just iterates over all ACPI-ids and sees if one matches. This means that it will return true for devices which are in the DSDT but disabled (their _STA method returns 0). For some drivers it is useful to be able to check if a certain HID is not only present in the namespace, but also actually present as in acpi_device_is_present() will return true for the device. For example because if a certain device is present then the driver will want to use an extcon or IIO ADC channel provided by that device. This commit adds a new acpi_dev_present helper which drivers can use to this end. Like acpi_dev_found, acpi_dev_present take a HID as argument, but it also has 2 extra optional arguments to only check for an ACPI device with a specific UID and/or HRV value. This makes it more generic and allows it to replace custom code doing similar checks in several places. Arguably acpi_dev_present is what acpi_dev_found should have been, but there are too many users to just change acpi_dev_found without the risk of breaking something. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Reviewed-by: Lukas Wunner <lukas@wunner.de> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
||
---|---|---|
.. | ||
platform | ||
acbuffer.h | ||
acconfig.h | ||
acexcep.h | ||
acnames.h | ||
acoutput.h | ||
acpi_bus.h | ||
acpi_drivers.h | ||
acpi_io.h | ||
acpi_lpat.h | ||
acpi_numa.h | ||
acpi.h | ||
acpiosxf.h | ||
acpixf.h | ||
acrestyp.h | ||
actbl1.h | ||
actbl2.h | ||
actbl3.h | ||
actbl.h | ||
actypes.h | ||
acuuid.h | ||
apei.h | ||
button.h | ||
cppc_acpi.h | ||
ghes.h | ||
hed.h | ||
pcc.h | ||
pdc_intel.h | ||
processor.h | ||
reboot.h | ||
video.h |