From: Antoniu Miclaus <antoniu.miclaus@xxxxxxxxxx> Add backend support for setting and getting the interface type in use. Link: https://lore.kernel.org/linux-iio/20241129153546.63584-1-antoniu.miclaus@xxxxxxxxxx/T/#m6d86939078d780512824f1540145aade38b0990b Signed-off-by: Antoniu Miclaus <antoniu.miclaus@xxxxxxxxxx> Co-developed-by: Angelo Dureghello <adureghello@xxxxxxxxxxxx> Signed-off-by: Angelo Dureghello <adureghello@xxxxxxxxxxxx> --- This patch has been picked up from the Antoniu patchset still not accepted, and extended with the interface setter, fixing also namespace names to be between quotation marks. --- drivers/iio/industrialio-backend.c | 42 ++++++++++++++++++++++++++++++++++++++ include/linux/iio/backend.h | 19 +++++++++++++++++ 2 files changed, 61 insertions(+) diff --git a/drivers/iio/industrialio-backend.c b/drivers/iio/industrialio-backend.c index 363281272035..6edc3e685f6a 100644 --- a/drivers/iio/industrialio-backend.c +++ b/drivers/iio/industrialio-backend.c @@ -636,6 +636,48 @@ ssize_t iio_backend_ext_info_set(struct iio_dev *indio_dev, uintptr_t private, } EXPORT_SYMBOL_NS_GPL(iio_backend_ext_info_set, "IIO_BACKEND"); +/** + * iio_backend_interface_type_get - get the interface type used. + * @back: Backend device + * @type: Interface type + * + * RETURNS: + * 0 on success, negative error number on failure. + */ +int iio_backend_interface_type_get(struct iio_backend *back, + enum iio_backend_interface_type *type) +{ + int ret; + + ret = iio_backend_op_call(back, interface_type_get, type); + if (ret) + return ret; + + if (*type >= IIO_BACKEND_INTERFACE_MAX) + return -EINVAL; + + return 0; +} +EXPORT_SYMBOL_NS_GPL(iio_backend_interface_type_get, "IIO_BACKEND"); + +/** + * iio_backend_interface_type_set - set the interface type used. + * @back: Backend device + * @type: Interface type + * + * RETURNS: + * 0 on success, negative error number on failure. + */ +int iio_backend_interface_type_set(struct iio_backend *back, + enum iio_backend_interface_type type) +{ + if (type >= IIO_BACKEND_INTERFACE_MAX) + return -EINVAL; + + return iio_backend_op_call(back, interface_type_set, type); +} +EXPORT_SYMBOL_NS_GPL(iio_backend_interface_type_set, "IIO_BACKEND"); + /** * iio_backend_extend_chan_spec - Extend an IIO channel * @back: Backend device diff --git a/include/linux/iio/backend.h b/include/linux/iio/backend.h index 10be00f3b120..2b7221099d8c 100644 --- a/include/linux/iio/backend.h +++ b/include/linux/iio/backend.h @@ -70,6 +70,15 @@ enum iio_backend_sample_trigger { IIO_BACKEND_SAMPLE_TRIGGER_MAX }; +enum iio_backend_interface_type { + IIO_BACKEND_INTERFACE_SERIAL_LVDS, + IIO_BACKEND_INTERFACE_SERIAL_CMOS, + IIO_BACKEND_INTERFACE_SERIAL_SPI, + IIO_BACKEND_INTERFACE_SERIAL_DSPI, + IIO_BACKEND_INTERFACE_SERIAL_QSPI, + IIO_BACKEND_INTERFACE_MAX +}; + /** * struct iio_backend_ops - operations structure for an iio_backend * @enable: Enable backend. @@ -88,6 +97,8 @@ enum iio_backend_sample_trigger { * @extend_chan_spec: Extend an IIO channel. * @ext_info_set: Extended info setter. * @ext_info_get: Extended info getter. + * @interface_type_get: Interface type. + * @interface_type_set: Interface type setter. * @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. @@ -128,6 +139,10 @@ struct iio_backend_ops { const char *buf, size_t len); int (*ext_info_get)(struct iio_backend *back, uintptr_t private, const struct iio_chan_spec *chan, char *buf); + int (*interface_type_get)(struct iio_backend *back, + enum iio_backend_interface_type *type); + int (*interface_type_set)(struct iio_backend *back, + enum iio_backend_interface_type type); int (*read_raw)(struct iio_backend *back, struct iio_chan_spec const *chan, int *val, int *val2, long mask); @@ -186,6 +201,10 @@ ssize_t iio_backend_ext_info_set(struct iio_dev *indio_dev, uintptr_t private, const char *buf, size_t len); 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_interface_type_set(struct iio_backend *back, + enum iio_backend_interface_type type); int iio_backend_read_raw(struct iio_backend *back, struct iio_chan_spec const *chan, int *val, int *val2, long mask); -- 2.47.0
