linux/drivers/iio/adc/ltc2497.h
Nuno Sá da8091f8ac iio: adc: ltc2947-core: do not use internal iio_dev lock
The iio_device lock is only meant for internal use. Hence define a
device local lock to protect against concurrent accesses.

While at it, properly include "mutex.h" for mutex related APIs.

Signed-off-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20221004134909.1692021-6-nuno.sa@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2022-11-23 19:43:58 +00:00

27 lines
696 B
C

/* SPDX-License-Identifier: GPL-2.0-only */
#define LTC2497_ENABLE 0xA0
#define LTC2497_CONFIG_DEFAULT LTC2497_ENABLE
#define LTC2497_CONVERSION_TIME_MS 150ULL
struct ltc2497_chip_info {
u32 resolution;
const char *name;
};
struct ltc2497core_driverdata {
struct regulator *ref;
ktime_t time_prev;
/* lock to protect against multiple access to the device */
struct mutex lock;
const struct ltc2497_chip_info *chip_info;
u8 addr_prev;
int (*result_and_measure)(struct ltc2497core_driverdata *ddata,
u8 address, int *val);
};
int ltc2497core_probe(struct device *dev, struct iio_dev *indio_dev);
void ltc2497core_remove(struct iio_dev *indio_dev);
MODULE_IMPORT_NS(LTC2497);