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Message-Id: <20240702-cleanup-ad7606-v3-6-57fd02a4e2aa@baylibre.com>
Date: Tue, 02 Jul 2024 17:34:10 +0000
From: Guillaume Stols <gstols@...libre.com>
To: Lars-Peter Clausen <lars@...afoo.de>,
Michael Hennerich <Michael.Hennerich@...log.com>,
Jonathan Cameron <jic23@...nel.org>, Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>
Cc: linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
Michael Hennerich <michael.hennerich@...log.com>,
linux-fbdev@...r.kernel.org, devicetree@...r.kernel.org,
Jonathan Cameron <Jonathan.Cameron@...wei.com>,
Guillaume Stols <gstols@...libre.com>, jstephan@...libre.com,
dlechner@...libre.com
Subject: [PATCH v3 6/8] iio: adc: ad7606: fix oversampling gpio array
gpiod_set_array_value was misused here: the implementation relied on the
assumption that an unsigned long was required for each gpio, while the
function expects a bit array stored in "as much unsigned long as needed
for storing one bit per GPIO", i.e it is using a bit field.
This leaded to incorrect parameter passed to gpiod_set_array_value, that
would set 1 value instead of 3.
It also prevents to select the software mode correctly for the AD7606B.
Fixes: d2a415c86c6b ("iio: adc: ad7606: Add support for AD7606B ADC")
Fixes: 41f71e5e7daf ("staging: iio: adc: ad7606: Use find_closest() macro")
Signed-off-by: Guillaume Stols <gstols@...libre.com>
---
drivers/iio/adc/ad7606.c | 4 ++--
drivers/iio/adc/ad7606_spi.c | 5 +++--
2 files changed, 5 insertions(+), 4 deletions(-)
diff --git a/drivers/iio/adc/ad7606.c b/drivers/iio/adc/ad7606.c
index 3a417595294f..8cce1fad9763 100644
--- a/drivers/iio/adc/ad7606.c
+++ b/drivers/iio/adc/ad7606.c
@@ -236,9 +236,9 @@ static int ad7606_write_os_hw(struct iio_dev *indio_dev, int val)
struct ad7606_state *st = iio_priv(indio_dev);
DECLARE_BITMAP(values, 3);
- values[0] = val;
+ values[0] = val & GENMASK(2, 0);
- gpiod_set_array_value(ARRAY_SIZE(values), st->gpio_os->desc,
+ gpiod_set_array_value(st->gpio_os->ndescs, st->gpio_os->desc,
st->gpio_os->info, values);
/* AD7616 requires a reset to update value */
diff --git a/drivers/iio/adc/ad7606_spi.c b/drivers/iio/adc/ad7606_spi.c
index 263a778bcf25..287a0591533b 100644
--- a/drivers/iio/adc/ad7606_spi.c
+++ b/drivers/iio/adc/ad7606_spi.c
@@ -249,8 +249,9 @@ static int ad7616_sw_mode_config(struct iio_dev *indio_dev)
static int ad7606B_sw_mode_config(struct iio_dev *indio_dev)
{
struct ad7606_state *st = iio_priv(indio_dev);
- unsigned long os[3] = {1};
+ DECLARE_BITMAP(os, 3);
+ bitmap_fill(os, 3);
/*
* Software mode is enabled when all three oversampling
* pins are set to high. If oversampling gpios are defined
@@ -258,7 +259,7 @@ static int ad7606B_sw_mode_config(struct iio_dev *indio_dev)
* otherwise, they must be hardwired to VDD
*/
if (st->gpio_os) {
- gpiod_set_array_value(ARRAY_SIZE(os),
+ gpiod_set_array_value(st->gpio_os->ndescs,
st->gpio_os->desc, st->gpio_os->info, os);
}
/* OS of 128 and 256 are available only in software mode */
--
2.34.1
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