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author | Hans de Goede <[email protected]> | 2017-04-19 14:02:08 +0200 |
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committer | Rafael J. Wysocki <[email protected]> | 2017-04-19 22:53:34 +0200 |
commit | 8661423eea1a1b58417014716e3f1ba286072379 (patch) | |
tree | 686462c9b7444bbc6ae2eb338901deb356c2c98b /tools/perf/scripts/python/export-to-postgresql.py | |
parent | 4f7d029b9bf009fbee76bb10c0c4351a1870d2f3 (diff) |
ACPI / utils: Add new acpi_dev_present helper
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 <[email protected]>
Reviewed-by: Lukas Wunner <[email protected]>
Reviewed-by: Mika Westerberg <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
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