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iio: imu: adis: add unlocked __adis_initial_startup()

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This change splits the __adis_initial_startup() away from
adis_initial_startup(). The unlocked version can be used in certain calls
during probe, where races won't happen since the ADIS driver may not be
registered yet with IIO.

Signed-off-by: Nuno Sá <nuno.sa@analog.com>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Alexandru Ardelean 2020-02-10 15:26:01 +02:00 committed by Jonathan Cameron
parent e914cfdf12
commit 3f17ada8f3
2 changed files with 16 additions and 11 deletions
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14
drivers/iio/imu/adis.c
View file

@ -365,7 +365,7 @@ static int adis_self_test(struct adis *adis)
}
/**
* adis_inital_startup() - Performs device self-test
* __adis_initial_startup() - Device initial setup
* @adis: The adis device
*
* Returns 0 if the device is operational, a negative error code otherwise.
@ -373,28 +373,22 @@ static int adis_self_test(struct adis *adis)
* This function should be called early on in the device initialization sequence
* to ensure that the device is in a sane and known state and that it is usable.
*/
int adis_initial_startup(struct adis *adis)
int __adis_initial_startup(struct adis *adis)
{
int ret;
mutex_lock(&adis->state_lock);
ret = adis_self_test(adis);
if (ret) {
dev_err(&adis->spi->dev, "Self-test failed, trying reset.\n");
__adis_reset(adis);
ret = adis_self_test(adis);
if (ret) {
if (ret)
dev_err(&adis->spi->dev, "Second self-test failed, giving up.\n");
goto out_unlock;
}
}
out_unlock:
mutex_unlock(&adis->state_lock);
return ret;
}
EXPORT_SYMBOL_GPL(adis_initial_startup);
EXPORT_SYMBOL_GPL(__adis_initial_startup);
/**
* adis_single_conversion() - Performs a single sample conversion

13
include/linux/iio/imu/adis.h
View file

@ -297,6 +297,7 @@ static inline int adis_read_reg_32(struct adis *adis, unsigned int reg,
int adis_enable_irq(struct adis *adis, bool enable);
int __adis_check_status(struct adis *adis);
int __adis_initial_startup(struct adis *adis);
static inline int adis_check_status(struct adis *adis)
{
@ -309,7 +310,17 @@ static inline int adis_check_status(struct adis *adis)
return ret;
}
int adis_initial_startup(struct adis *adis);
/* locked version of __adis_initial_startup() */
static inline int adis_initial_startup(struct adis *adis)
{
int ret;
mutex_lock(&adis->state_lock);
ret = __adis_initial_startup(adis);
mutex_unlock(&adis->state_lock);
return ret;
}
int adis_single_conversion(struct iio_dev *indio_dev,
const struct iio_chan_spec *chan, unsigned int error_mask,