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Fri, 16 May 2025 04:26:42 -0400 From: Antoniu Miclaus To: , , , , , CC: Antoniu Miclaus , =?UTF-8?q?Nuno=20S=C3=A1?= Subject: [PATCH v6 02/10] iio: backend: add support for data alignment Date: Fri, 16 May 2025 11:26:22 +0300 Message-ID: <20250516082630.8236-3-antoniu.miclaus@analog.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250516082630.8236-1-antoniu.miclaus@analog.com> References: <20250516082630.8236-1-antoniu.miclaus@analog.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-GUID: hjS6tQnkKX2ml0NvlG0KlWXNEtnGfGgG X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNTE2MDA3OSBTYWx0ZWRfX9swB45JTor+H EEeTJFeibFD0Ix3gv9WVKAjJlQuCxvouOO9YnC9kZUu2+Cw+SpnUE5FWtbhTPoegtv57Jv67S1B sjkEuUK4aI87xdI4kFo8bytawsuzBD21cUczCThXIK4rtLX890+d6DDfbaXKyq0ioNJnFAIXDsC YZ1e6FooPlQQ0pUW2HIDF/C4rhgjM4ZZzPe1mphHUsUgouGS1Ob/5ckJDBJ8nSLXvQJtobl3gyG bL5Ok0CZ7YXzjEzxXE8kfe6jPViS85HEqXQHlHq8HCXpiN1vjfhAgS8js/vCC4q19VukmSr2mco gNb2SWLB46jjfkmXr1O9q6MY8YwcyQqFyrRyAxst4YAlWY6NfIKowfMV6ZbVZArhDqRiZWoX83B FakMsQvtUmSOGafI5Z8A7UkViI59jIXGyPt14FFriTjHnW7XjuiuccI9ipUOK3Y/LSjL4Eu7 X-Authority-Analysis: v=2.4 cv=SZL3duRu c=1 sm=1 tr=0 ts=6826f6c7 cx=c_pps a=PpDZqlmH/M8setHirZLBMw==:117 a=PpDZqlmH/M8setHirZLBMw==:17 a=IkcTkHD0fZMA:10 a=dt9VzEwgFbYA:10 a=gAnH3GRIAAAA:8 a=LieQXdaOVuYbdPten0EA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 X-Proofpoint-ORIG-GUID: hjS6tQnkKX2ml0NvlG0KlWXNEtnGfGgG X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.0.736,FMLib:17.12.80.40 definitions=2025-05-16_03,2025-05-15_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 lowpriorityscore=0 mlxlogscore=999 adultscore=0 priorityscore=1501 mlxscore=0 suspectscore=0 malwarescore=0 spamscore=0 clxscore=1015 phishscore=0 bulkscore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2505070000 definitions=main-2505160079 Add backend support for staring the capture synchronization. When activated, it initates a proccess that aligns the sample's most significant bit (MSB) based solely on the captured data, without considering any other external signals. Reviewed-by: Nuno Sá Signed-off-by: Antoniu Miclaus --- no changes in v6. drivers/iio/industrialio-backend.c | 23 +++++++++++++++++++++++ include/linux/iio/backend.h | 3 +++ 2 files changed, 26 insertions(+) diff --git a/drivers/iio/industrialio-backend.c b/drivers/iio/industrialio-backend.c index 038c9e1e2857..545923310f1f 100644 --- a/drivers/iio/industrialio-backend.c +++ b/drivers/iio/industrialio-backend.c @@ -796,6 +796,29 @@ int iio_backend_filter_type_set(struct iio_backend *back, } EXPORT_SYMBOL_NS_GPL(iio_backend_filter_type_set, "IIO_BACKEND"); +/** + * iio_backend_data_align - Perform the data alignment process. + * @back: Backend device + * @timeout_us: Timeout value in us. + * + * When activated, it initates a proccess that aligns the sample's most + * significant bit (MSB) based solely on the captured data, without + * considering any other external signals. + * + * The timeout_us value must be greater than 0. + * + * RETURNS: + * 0 on success, negative error number on failure. + */ +int iio_backend_interface_data_align(struct iio_backend *back, u32 timeout_us) +{ + if (!timeout_us) + return -EINVAL; + + return iio_backend_op_call(back, interface_data_align, timeout_us); +} +EXPORT_SYMBOL_NS_GPL(iio_backend_interface_data_align, "IIO_BACKEND"); + /** * iio_backend_ddr_enable - Enable interface DDR (Double Data Rate) mode * @back: Backend device diff --git a/include/linux/iio/backend.h b/include/linux/iio/backend.h index 5526800f5d4a..a971a83121b7 100644 --- a/include/linux/iio/backend.h +++ b/include/linux/iio/backend.h @@ -109,6 +109,7 @@ enum iio_backend_filter_type { * @debugfs_print_chan_status: Print channel status into a buffer. * @debugfs_reg_access: Read or write register value of backend. * @filter_type_set: Set filter type. + * @interface_data_align: Perform the data alignment process. * @ddr_enable: Enable interface DDR (Double Data Rate) mode. * @ddr_disable: Disable interface DDR (Double Data Rate) mode. * @data_stream_enable: Enable data stream. @@ -161,6 +162,7 @@ struct iio_backend_ops { unsigned int writeval, unsigned int *readval); int (*filter_type_set)(struct iio_backend *back, enum iio_backend_filter_type type); + int (*interface_data_align)(struct iio_backend *back, u32 timeout_us); int (*ddr_enable)(struct iio_backend *back); int (*ddr_disable)(struct iio_backend *back); int (*data_stream_enable)(struct iio_backend *back); @@ -203,6 +205,7 @@ int devm_iio_backend_request_buffer(struct device *dev, struct iio_dev *indio_dev); int iio_backend_filter_type_set(struct iio_backend *back, enum iio_backend_filter_type type); +int iio_backend_interface_data_align(struct iio_backend *back, u32 timeout_us); int iio_backend_ddr_enable(struct iio_backend *back); int iio_backend_ddr_disable(struct iio_backend *back); int iio_backend_data_stream_enable(struct iio_backend *back); -- 2.49.0