From: Oliver Lang Oliver.Lang@gossenmetrawatt.com
stable inclusion from stable-5.10.50 commit c6c3ea1d9d4f806a1d89ef8b50b03ed51da131a2 bugzilla: 174522 https://gitee.com/openeuler/kernel/issues/I4DNFY
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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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
Signed-off-by: Chen Jun chenjun102@huawei.com Acked-by: Weilong Chen chenweilong@huawei.com Signed-off-by: Chen Jun chenjun102@huawei.com --- drivers/iio/light/ltr501.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/iio/light/ltr501.c b/drivers/iio/light/ltr501.c index 0ed3392a33cf..79898b72fe73 100644 --- a/drivers/iio/light/ltr501.c +++ b/drivers/iio/light/ltr501.c @@ -1208,7 +1208,7 @@ static struct ltr501_chip_info ltr501_chip_info_tbl[] = { .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 = <r501_info,