[PATCH 5.14 071/151] iio: adis16480: fix devices that do not support sleep mode

Greg Kroah-Hartman
2021-10-18T13:58:03Z

From: Nuno Sá <nuno.sa@analog.com>

commit ea1945c2f72d7bd253e2ebaa97cdd8d9ffcde076 upstream.

Not all devices supported by this driver support being put to sleep
mode. For those devices, when calling 'adis16480_stop_device()' on the
unbind path, we where actually writing in the SYNC_SCALE register.

Fixes: 80cbc848c4fa0 ("iio: imu: adis16480: Add support for ADIS16490")
Fixes: 82e7a1b250170 ("iio: imu: adis16480: Add support for ADIS1649x family of devices")
Signed-off-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20210903141423.517028-6-nuno.sa@analog.com
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/imu/adis16480.c | 14 +++++++++++---
1 file changed, 11 insertions(+), 3 deletions(-)

--- a/drivers/iio/imu/adis16480.c
+++ b/drivers/iio/imu/adis16480.c
@@ -144,6 +144,7 @@ struct adis16480_chip_info {
unsigned int max_dec_rate;
const unsigned int *filter_freqs;
bool has_pps_clk_mode;
+ bool has_sleep_cnt;
const struct adis_data adis_data;
};

@@ -939,6 +940,7 @@ static const struct adis16480_chip_info
.temp_scale = 5650, /* 5.65 milli degree Celsius */
.int_clk = 2460000,
.max_dec_rate = 2048,
+ .has_sleep_cnt = true,
.filter_freqs = adis16480_def_filter_freqs,
.adis_data = ADIS16480_DATA(16375, &adis16485_timeouts, 0),
},
@@ -952,6 +954,7 @@ static const struct adis16480_chip_info
.temp_scale = 5650, /* 5.65 milli degree Celsius */
.int_clk = 2460000,
.max_dec_rate = 2048,
+ .has_sleep_cnt = true,
.filter_freqs = adis16480_def_filter_freqs,
.adis_data = ADIS16480_DATA(16480, &adis16480_timeouts, 0),
},
@@ -965,6 +968,7 @@ static const struct adis16480_chip_info
.temp_scale = 5650, /* 5.65 milli degree Celsius */
.int_clk = 2460000,
.max_dec_rate = 2048,
+ .has_sleep_cnt = true,
.filter_freqs = adis16480_def_filter_freqs,
.adis_data = ADIS16480_DATA(16485, &adis16485_timeouts, 0),
},
@@ -978,6 +982,7 @@ static const struct adis16480_chip_info
.temp_scale = 5650, /* 5.65 milli degree Celsius */
.int_clk = 2460000,
.max_dec_rate = 2048,
+ .has_sleep_cnt = true,
.filter_freqs = adis16480_def_filter_freqs,
.adis_data = ADIS16480_DATA(16488, &adis16485_timeouts, 0),
},
@@ -1425,9 +1430,12 @@ static int adis16480_probe(struct spi_de
if (ret)
return ret;

- ret = devm_add_action_or_reset(&spi->dev, adis16480_stop, indio_dev);
- if (ret)
- return ret;
+ if (st->chip_info->has_sleep_cnt) {
+ ret = devm_add_action_or_reset(&spi->dev, adis16480_stop,
+ indio_dev);
+ if (ret)
+ return ret;
+ }

ret = adis16480_config_irq_pin(spi->dev.of_node, st);
if (ret)