• Ira W. Snyder's avatar
    hwmon: (ltc4245) Expose all GPIO pins as analog voltages · 5950ec8d
    Ira W. Snyder authored
    Add support for exposing all GPIO pins as analog voltages. Though this is
    not an ideal use of the chip, some hardware engineers may decide that the
    LTC4245 meets their design requirements when studying the datasheet.
    The GPIO pins are sampled in round-robin fashion, meaning that a slow
    reader will see stale data. A userspace application can detect this,
    because it will get -EAGAIN when reading from a sysfs file which contains
    stale data.
    Users can choose to use this feature on a per-chip basis by using either
    platform data or the OF device tree (where applicable).
    Signed-off-by: default avatarIra W. Snyder <iws@ovro.caltech.edu>
    Signed-off-by: default avatarJean Delvare <khali@linux-fr.org>
ltc4245.h 538 Bytes