linux-kernel - [PATCH v2 3/3] iio: addac: ad74413r: correct comparator gpio getters mask usage

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Date:   Tue, 11 Jan 2022 00:05:09 +0200
From:   Cosmin Tanislav <demonsingur@...il.com>
To:     andy.shevchenko@...il.com
Cc:     cosmin.tanislav@...log.com, demonsingur@...il.com,
        Lars-Peter Clausen <lars@...afoo.de>,
        Michael Hennerich <Michael.Hennerich@...log.com>,
        Rob Herring <robh+dt@...nel.org>, linux-iio@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>, linux-gpio@...r.kernel.org
Subject: [PATCH v2 3/3] iio: addac: ad74413r: correct comparator gpio getters mask usage

The value of the GPIOs is currently altered using offsets rather
than masks. Make use of __assign_bit and the BIT macro to turn
the offsets into masks.

Fixes: fea251b6a5db ("iio: addac: add AD74413R driver")
Signed-off-by: Cosmin Tanislav <cosmin.tanislav@...log.com>
---
V1 -> V2
 * add Fixes tag
 * use __assign_bit
 * remove bitmap_zero
---
 drivers/iio/addac/ad74413r.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/iio/addac/ad74413r.c b/drivers/iio/addac/ad74413r.c
index 3d089c0b6f7a..8a8d60e592a8 100644
--- a/drivers/iio/addac/ad74413r.c
+++ b/drivers/iio/addac/ad74413r.c
@@ -134,7 +134,6 @@ struct ad74413r_state {
 #define AD74413R_CH_EN_MASK(x)		BIT(x)
 
 #define AD74413R_REG_DIN_COMP_OUT		0x25
-#define AD74413R_DIN_COMP_OUT_SHIFT_X(x)	x
 
 #define AD74413R_REG_ADC_RESULT_X(x)	(0x26 + (x))
 #define AD74413R_ADC_RESULT_MAX		GENMASK(15, 0)
@@ -316,7 +315,7 @@ static int ad74413r_gpio_get(struct gpio_chip *chip, unsigned int offset)
 	if (ret)
 		return ret;
 
-	status &= AD74413R_DIN_COMP_OUT_SHIFT_X(real_offset);
+	status &= BIT(real_offset);
 
 	return status ? 1 : 0;
 }
@@ -336,9 +335,7 @@ static int ad74413r_gpio_get_multiple(struct gpio_chip *chip,
 
 	for_each_set_bit(offset, mask, chip->ngpio) {
 		unsigned int real_offset = st->comp_gpio_offsets[offset];
-
-		if (val & BIT(real_offset))
-			*bits |= offset;
+		__assign_bit(offset, bits, val & BIT(real_offset));
 	}
 
 	return ret;
-- 
2.34.1