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| author | Daniel Scally <djrscally@gmail.com> | 2021-01-07 14:28:36 +0100 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2021-01-26 19:34:29 +0100 |
| commit | bf263f64e804a74ace9bd37f49341d68a653e5e6 (patch) | |
| tree | ddd17a9a5542b38da413fe6b6097e06744e099f8 /include | |
| parent | 06c85233121fabc69ffe6124953cd5304dbf3afd (diff) | |
| download | linux-bf263f64e804a74ace9bd37f49341d68a653e5e6.tar.bz2 | |
media: ACPI / bus: Add acpi_dev_get_next_match_dev() and helper macro
To ensure we handle situations in which multiple sensors of the same
model (and therefore _HID) are present in a system, we need to be able
to iterate over devices matching a known _HID but unknown _UID and _HRV
- add acpi_dev_get_next_match_dev() to accommodate that possibility and
change acpi_dev_get_first_match_dev() to simply call the new function
with a NULL starting point. Add an iterator macro for convenience.
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Daniel Scally <djrscally@gmail.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/acpi/acpi_bus.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index 6d1879bf9440..02a716a0af5d 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -684,8 +684,15 @@ static inline bool acpi_device_can_poweroff(struct acpi_device *adev) bool acpi_dev_hid_uid_match(struct acpi_device *adev, const char *hid2, const char *uid2); struct acpi_device * +acpi_dev_get_next_match_dev(struct acpi_device *adev, const char *hid, const char *uid, s64 hrv); +struct acpi_device * acpi_dev_get_first_match_dev(const char *hid, const char *uid, s64 hrv); +#define for_each_acpi_dev_match(adev, hid, uid, hrv) \ + for (adev = acpi_dev_get_first_match_dev(hid, uid, hrv); \ + adev; \ + adev = acpi_dev_get_next_match_dev(adev, hid, uid, hrv)) + static inline void acpi_dev_put(struct acpi_device *adev) { put_device(&adev->dev); |