diff options
| author | Niklas Söderlund <niklas.soderlund@ragnatech.se> | 2020-08-03 18:35:09 +0200 |
|---|---|---|
| committer | Niklas Söderlund <niklas.soderlund@ragnatech.se> | 2020-08-05 20:07:13 +0200 |
| commit | 39efe737746d6da8e4819f41b6e4069c4b09d359 (patch) | |
| tree | 5dc4a23ce0061e509ffd0d54965500c7eefea0bf /include | |
| parent | 6ad3258cd34295611e871edf5e8474d4aa79af59 (diff) | |
libcamera: sysfs: Add helper to lookup device firmware node path
A system's firmware description is recorded differently in sysfs
depending if the system uses DT or ACPI. Add a helper to abstract
this, allowing users not to care which of the two are used.
For DT-based systems, the path is the full name of the DT node that
represents the device. For ACPI-based systems, the path is the absolute
namespace path to the ACPI object that represents the device. In both
cases, the path is guaranteed to be unique and persistent as long as the
system firmware is not modified.
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/libcamera/internal/sysfs.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/libcamera/internal/sysfs.h b/include/libcamera/internal/sysfs.h index 247a376a..bc6c1620 100644 --- a/include/libcamera/internal/sysfs.h +++ b/include/libcamera/internal/sysfs.h @@ -15,6 +15,8 @@ namespace sysfs { std::string charDevPath(const std::string &deviceNode); +std::string firmwareNodePath(const std::string &device); + } /* namespace sysfs */ } /* namespace libcamera */ |