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    Subject[PATCH 3.16 029/127] regulator: ltc3589: fix broken voltage transitions
    Date
    3.16-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Steffen Trumtrar <s.trumtrar@pengutronix.de>

    commit c5bb725ac2d1a13e9e766bf9a16bac986ade17cd upstream.

    VCCR is used as a trigger to start voltage transitions, so
    we need to mark it volatile in order to make sure it gets
    written to hardware every time we set a new voltage.

    Fixes regulator voltage being stuck at the first voltage
    set after driver load.

    [lst: reworded commit message]
    Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
    Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
    Signed-off-by: Mark Brown <broonie@kernel.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    drivers/regulator/ltc3589.c | 1 +
    1 file changed, 1 insertion(+)

    --- a/drivers/regulator/ltc3589.c
    +++ b/drivers/regulator/ltc3589.c
    @@ -372,6 +372,7 @@ static bool ltc3589_volatile_reg(struct
    switch (reg) {
    case LTC3589_IRQSTAT:
    case LTC3589_PGSTAT:
    + case LTC3589_VCCR:
    return true;
    }
    return false;



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