diff options
| author |   Antoniu Miclaus <antoniu.miclaus@analog.com> | 2025-02-14 15:19:48 +0200 |
|---|---|---|
| committer |   Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2025-02-16 15:11:55 +0000 |
| commit | fc3fdb835eebb2ba88c6fdbf2c8b9eae1ceab106 (patch) | |
| tree | 3fa0d6796629e23ad992461f79b9af3ee534d943 | |
| parent | iio: backend: add API for interface get (diff) | |
| download | wireguard-linux-fc3fdb835eebb2ba88c6fdbf2c8b9eae1ceab106.tar.xz wireguard-linux-fc3fdb835eebb2ba88c6fdbf2c8b9eae1ceab106.zip | |
iio: backend: add support for data size set
Add backend support for setting the data size used.
This setting can be adjusted within the IP cores interfacing devices.
Reviewed-by: Nuno Sa <nuno.sa@analog.com>
Reviewed-by: David Lechner <dlechner@baylibre.com>
Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
Link: https://patch.msgid.link/20250214131955.31973-3-antoniu.miclaus@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
| -rw-r--r-- | drivers/iio/industrialio-backend.c | 21 | ||||
| -rw-r--r-- | include/linux/iio/backend.h | 3 |
2 files changed, 24 insertions, 0 deletions
diff --git a/drivers/iio/industrialio-backend.c b/drivers/iio/industrialio-backend.c index 8bf3d570da1b..2088afa7a55c 100644 --- a/drivers/iio/industrialio-backend.c +++ b/drivers/iio/industrialio-backend.c @@ -661,6 +661,27 @@ int iio_backend_interface_type_get(struct iio_backend *back, EXPORT_SYMBOL_NS_GPL(iio_backend_interface_type_get, "IIO_BACKEND"); /** + * iio_backend_data_size_set - set the data width/size in the data bus. + * @back: Backend device + * @size: Size in bits + * + * Some frontend devices can dynamically control the word/data size on the + * interface/data bus. Hence, the backend device needs to be aware of it so + * data can be correctly transferred. + * + * Return: + * 0 on success, negative error number on failure. + */ +int iio_backend_data_size_set(struct iio_backend *back, unsigned int size) +{ + if (!size) + return -EINVAL; + + return iio_backend_op_call(back, data_size_set, size); +} +EXPORT_SYMBOL_NS_GPL(iio_backend_data_size_set, "IIO_BACKEND"); + +/** * iio_backend_extend_chan_spec - Extend an IIO channel * @back: Backend device * @chan: IIO channel diff --git a/include/linux/iio/backend.h b/include/linux/iio/backend.h index a0ea6c29d7ba..9ae861a21472 100644 --- a/include/linux/iio/backend.h +++ b/include/linux/iio/backend.h @@ -95,6 +95,7 @@ enum iio_backend_interface_type { * @ext_info_set: Extended info setter. * @ext_info_get: Extended info getter. * @interface_type_get: Interface type. + * @data_size_set: Data size. * @read_raw: Read a channel attribute from a backend device * @debugfs_print_chan_status: Print channel status into a buffer. * @debugfs_reg_access: Read or write register value of backend. @@ -137,6 +138,7 @@ struct iio_backend_ops { const struct iio_chan_spec *chan, char *buf); int (*interface_type_get)(struct iio_backend *back, enum iio_backend_interface_type *type); + int (*data_size_set)(struct iio_backend *back, unsigned int size); int (*read_raw)(struct iio_backend *back, struct iio_chan_spec const *chan, int *val, int *val2, long mask); @@ -197,6 +199,7 @@ ssize_t iio_backend_ext_info_get(struct iio_dev *indio_dev, uintptr_t private, const struct iio_chan_spec *chan, char *buf); int iio_backend_interface_type_get(struct iio_backend *back, enum iio_backend_interface_type *type); +int iio_backend_data_size_set(struct iio_backend *back, unsigned int size); int iio_backend_read_raw(struct iio_backend *back, struct iio_chan_spec const *chan, int *val, int *val2, long mask); |