linux-kernel - [PATCH 5.10 055/103] iio: adc: max1027: Fix wrong shift with 12-bit devices

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Date:   Mon, 18 Oct 2021 15:24:31 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Miquel Raynal <miquel.raynal@...tlin.com>,
        Nuno Sá <nuno.sa@...log.com>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>
Subject: [PATCH 5.10 055/103] iio: adc: max1027: Fix wrong shift with 12-bit devices

From: Miquel Raynal <miquel.raynal@...tlin.com>

commit 732ae19ee8f58ecaf30cbc1bbbda5cbee6a45043 upstream.

10-bit devices must shift the value twice.
This is not needed anymore on 12-bit devices.

Fixes: ae47d009b508 ("iio: adc: max1027: Introduce 12-bit devices support")
Cc: stable@...r.kernel.org
Signed-off-by: Miquel Raynal <miquel.raynal@...tlin.com>
Reviewed-by: Nuno Sá <nuno.sa@...log.com>
Link: https://lore.kernel.org/r/20210818111139.330636-2-miquel.raynal@bootlin.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/iio/adc/max1027.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/iio/adc/max1027.c
+++ b/drivers/iio/adc/max1027.c
@@ -103,7 +103,7 @@ MODULE_DEVICE_TABLE(of, max1027_adc_dt_i
 			.sign = 'u',					\
 			.realbits = depth,				\
 			.storagebits = 16,				\
-			.shift = 2,					\
+			.shift = (depth == 10) ? 2 : 0,			\
 			.endianness = IIO_BE,				\
 		},							\
 	}