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ACPI / utils: Introduce acpi_dev_hid_uid_match() helper

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There are users outside of ACPI realm which reimplementing the comparator
function to check if the given device matches to given HID and UID.

For better utilization, introduce a helper for everyone to use.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Andy Shevchenko 2019-10-01 17:27:22 +03:00 committed by Rafael J. Wysocki
parent a814dcc269
commit 35009c8074
3 changed files with 35 additions and 0 deletions
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25
drivers/acpi/utils.c
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@ -701,6 +701,31 @@ bool acpi_check_dsm(acpi_handle handle, const guid_t *guid, u64 rev, u64 funcs)
} }
EXPORT_SYMBOL(acpi_check_dsm); EXPORT_SYMBOL(acpi_check_dsm);
/**
* acpi_dev_hid_uid_match - Match device by supplied HID and UID
* @adev: ACPI device to match.
* @hid2: Hardware ID of the device.
* @uid2: Unique ID of the device, pass NULL to not check _UID.
*
* Matches HID and UID in @adev with given @hid2 and @uid2.
* Returns true if matches.
*/
bool acpi_dev_hid_uid_match(struct acpi_device *adev,
const char *hid2, const char *uid2)
{
const char *hid1 = acpi_device_hid(adev);
const char *uid1 = acpi_device_uid(adev);
if (strcmp(hid1, hid2))
return false;
if (!uid2)
return true;
return uid1 && !strcmp(uid1, uid2);
}
EXPORT_SYMBOL(acpi_dev_hid_uid_match);
/** /**
* acpi_dev_found - Detect presence of a given ACPI device in the namespace. * acpi_dev_found - Detect presence of a given ACPI device in the namespace.
* @hid: Hardware ID of the device. * @hid: Hardware ID of the device.

2
include/acpi/acpi_bus.h
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@ -680,6 +680,8 @@ static inline bool acpi_device_can_poweroff(struct acpi_device *adev)
adev->power.states[ACPI_STATE_D3_HOT].flags.explicit_set); adev->power.states[ACPI_STATE_D3_HOT].flags.explicit_set);
} }
bool acpi_dev_hid_uid_match(struct acpi_device *adev, const char *hid2, const char *uid2);
struct acpi_device * struct acpi_device *
acpi_dev_get_first_match_dev(const char *hid, const char *uid, s64 hrv); acpi_dev_get_first_match_dev(const char *hid, const char *uid, s64 hrv);

8
include/linux/acpi.h
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@ -678,6 +678,14 @@ static inline bool acpi_dev_present(const char *hid, const char *uid, s64 hrv)
return false; return false;
} }
struct acpi_device;
static inline bool
acpi_dev_hid_uid_match(struct acpi_device *adev, const char *hid2, const char *uid2)
{
return false;
}
static inline struct acpi_device * static inline struct acpi_device *
acpi_dev_get_first_match_dev(const char *hid, const char *uid, s64 hrv) acpi_dev_get_first_match_dev(const char *hid, const char *uid, s64 hrv)
{ {