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    iio: st_sensors: support open drain mode · 0e6f6871
    Linus Walleij 提交于
    Some types of ST Sensors can be connected to the same IRQ line
    as other peripherals using open drain. Add a device tree binding
    and a sensor data property to flip the right bit in the interrupt
    control register to enable open drain mode on the INT line.
    
    If the line is set to be open drain, also tag on IRQF_SHARED
    to the IRQ flags when requesting the interrupt, as the whole
    point of using open drain interrupt lines is to share them with
    more than one peripheral (wire-or).
    
    Cc: devicetree@vger.kernel.org
    Cc: Giuseppe Barba <giuseppe.barba@st.com>
    Cc: Denis Ciocca <denis.ciocca@st.com>
    Acked-by: NRob Herring <rob@kernel.org>
    Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
    Signed-off-by: NJonathan Cameron <jic23@kernel.org>
    0e6f6871
st_sensors.h 8.9 KB