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Mon, 23 Sep 2024 06:16:01 -0400 From: Antoniu Miclaus To: Jonathan Cameron , Lars-Peter Clausen , Michael Hennerich , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Nuno Sa , Olivier Moysan , =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= , Andy Shevchenko , David Lechner , Marcelo Schmitt , =?UTF-8?q?Jo=C3=A3o=20Paulo=20Gon=C3=A7alves?= , Dumitru Ceclan , AngeloGioacchino Del Regno , Antoniu Miclaus , Alisa-Dariana Roman , Marius Cristea , Sergiu Cuciurean , Dragos Bogdan , , , , Subject: [PATCH 2/7] iio: backend: add support for data size set Date: Mon, 23 Sep 2024 13:10:19 +0300 Message-ID: <20240923101206.3753-3-antoniu.miclaus@analog.com> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20240923101206.3753-1-antoniu.miclaus@analog.com> References: <20240923101206.3753-1-antoniu.miclaus@analog.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-GUID: YhTKn0sIcdYmzXATMCNAi84Q2lbnqM_G X-Proofpoint-ORIG-GUID: YhTKn0sIcdYmzXATMCNAi84Q2lbnqM_G X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.60.29 definitions=2024-09-06_09,2024-09-06_01,2024-09-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 impostorscore=0 suspectscore=0 mlxlogscore=999 mlxscore=0 malwarescore=0 spamscore=0 priorityscore=1501 adultscore=0 phishscore=0 lowpriorityscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2408220000 definitions=main-2409230075 Content-Type: text/plain; charset="utf-8" Add backend support for setting the data size used. Signed-off-by: Antoniu Miclaus --- drivers/iio/industrialio-backend.c | 21 +++++++++++++++++++++ include/linux/iio/backend.h | 3 +++ 2 files changed, 24 insertions(+) diff --git a/drivers/iio/industrialio-backend.c b/drivers/iio/industrialio-= backend.c index 53ab6bc86a50..a6a6bedce7f1 100644 --- a/drivers/iio/industrialio-backend.c +++ b/drivers/iio/industrialio-backend.c @@ -473,6 +473,27 @@ int iio_backend_interface_type_get(struct iio_backend = *back, } EXPORT_SYMBOL_NS_GPL(iio_backend_interface_type_get, IIO_BACKEND); =20 +/** + * 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. + * + * RETURNS: + * 0 on success, negative error number on failure. + */ +ssize_t iio_backend_data_size_set(struct iio_backend *back, ssize_t 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 * @indio_dev: IIO device diff --git a/include/linux/iio/backend.h b/include/linux/iio/backend.h index ba8ad30ac9ba..85b33ed69cc0 100644 --- a/include/linux/iio/backend.h +++ b/include/linux/iio/backend.h @@ -87,6 +87,7 @@ 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. **/ struct iio_backend_ops { int (*enable)(struct iio_backend *back); @@ -121,6 +122,7 @@ 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, ssize_t size); }; =20 int iio_backend_chan_enable(struct iio_backend *back, unsigned int chan); @@ -152,6 +154,7 @@ ssize_t iio_backend_ext_info_get(struct iio_dev *indio_= dev, uintptr_t private, =20 int iio_backend_interface_type_get(struct iio_backend *back, enum iio_backend_interface_type *type); +ssize_t iio_backend_data_size_set(struct iio_backend *back, ssize_t size); int iio_backend_extend_chan_spec(struct iio_dev *indio_dev, struct iio_backend *back, struct iio_chan_spec *chan); --=20 2.46.0