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    Subject[PATCH 5.10 075/593] iio: ltr501: ltr559: fix initialization of LTR501_ALS_CONTR
    Date
    From: Oliver Lang <Oliver.Lang@gossenmetrawatt.com>

    commit 421a26f3d7a7c3ca43f3a9dc0f3cb0f562d5bd95 upstream.

    The ltr559 chip uses only the lowest bit of the ALS_CONTR register to
    configure between active and stand-by mode. In the original driver
    BIT(1) is used, which does a software reset instead.

    This patch fixes the problem by using BIT(0) as als_mode_active for
    the ltr559 chip.

    Fixes: 8592a7eefa54 ("iio: ltr501: Add support for ltr559 chip")
    Signed-off-by: Oliver Lang <Oliver.Lang@gossenmetrawatt.com>
    Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
    Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
    Tested-by: Nikita Travkin <nikita@trvn.ru> # ltr559
    Link: https://lore.kernel.org/r/20210610134619.2101372-3-mkl@pengutronix.de
    Cc: <Stable@vger.kernel.org>
    Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    drivers/iio/light/ltr501.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    --- a/drivers/iio/light/ltr501.c
    +++ b/drivers/iio/light/ltr501.c
    @@ -1208,7 +1208,7 @@ static struct ltr501_chip_info ltr501_ch
    .als_gain_tbl_size = ARRAY_SIZE(ltr559_als_gain_tbl),
    .ps_gain = ltr559_ps_gain_tbl,
    .ps_gain_tbl_size = ARRAY_SIZE(ltr559_ps_gain_tbl),
    - .als_mode_active = BIT(1),
    + .als_mode_active = BIT(0),
    .als_gain_mask = BIT(2) | BIT(3) | BIT(4),
    .als_gain_shift = 2,
    .info = &ltr501_info,

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