From patchwork Tue Jun 18 16:08:27 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Olivier Moysan X-Patchwork-Id: 13702583 Received: from mx07-00178001.pphosted.com (mx07-00178001.pphosted.com [185.132.182.106]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1116D768E1; Tue, 18 Jun 2024 16:10:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.132.182.106 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718727028; cv=none; b=MkK7KDF2GmKr7/k99PlqpL2XKpL6xKxH2qXJhRliZrJcHiSEWatcwpf6ZHy9p9Gnjc65J+YgJzLO5mV8M3j3UYiEg0XXBytCnBHyuP+jtE0mnMM4TOb4N9BG1Pd1rK0+i2DCjgAP2iG12Yg6xEZApEtVNoFS9gF2Htap9a+7FM4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718727028; c=relaxed/simple; bh=WnYHhpxz9XlN8DeOrkUc8ti0eDWrfck7MDCrMFMg9h0=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=MnJArWGn9IzsH65cqI1ZYyHCXDV5vUNk7nIEtt2eC7Ss9o/UA+30dSTRsokDxD2NfGXrUme3xsNzPMEowdODRrN7RXlkvMhTsvstXbGElN6lolXjDgYd29Klo3VtGRG9Y1o3jgbAxtdoG0/XGln6lpJv4z45zKIV8oaMg/EiQrE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=foss.st.com; spf=pass smtp.mailfrom=foss.st.com; dkim=pass (2048-bit key) header.d=foss.st.com header.i=@foss.st.com header.b=i5Q6aiiA; arc=none smtp.client-ip=185.132.182.106 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=foss.st.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=foss.st.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=foss.st.com header.i=@foss.st.com header.b="i5Q6aiiA" Received: from pps.filterd (m0288072.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 45IFZ34s031794; Tue, 18 Jun 2024 18:09:55 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foss.st.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=selector1; bh= oBCkKn2xGyjUcuH9Isse3UsfR/NglWbSwpBTIgOD8P4=; b=i5Q6aiiAhdqsWdh3 COWH75mYjCzG2pIayjSaeCWo6gFdff4vmdgtWq0H5fK7Lz7VeVLwCQj/27uWzC89 aSeC+TFdNXZqE7qFTSbn/rqFEmzsfTCRiN3r3E8Jier68lWgX0sMdBhzyoAtjaPI 4gf5QOURQlUDWssLYf4eFVKXh6dblMisLnDziwJ0iRAdoQJP3AHqC9UUb/WIthLH 7culiSKt+7p9vJg8W1YlDrb2IGsjEOAPeZGaxZdE8mFm7ExV0tSbkHDCIXUCdL0g vz8j8P03g0I4nPHV81MP/AhFt8nxWR5it/pJX6L2oVI/xQUM/DGpqJ2IyVTkgBRf Ov5BeQ== Received: from beta.dmz-ap.st.com (beta.dmz-ap.st.com [138.198.100.35]) by mx07-00178001.pphosted.com (PPS) with ESMTPS id 3ys0cgca1p-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 18 Jun 2024 18:09:55 +0200 (MEST) Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-ap.st.com (STMicroelectronics) with ESMTP id 76F3940044; Tue, 18 Jun 2024 18:09:46 +0200 (CEST) Received: from Webmail-eu.st.com (shfdag1node1.st.com [10.75.129.69]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 7B94321D3C8; Tue, 18 Jun 2024 18:09:23 +0200 (CEST) Received: from localhost (10.252.27.64) by SHFDAG1NODE1.st.com (10.75.129.69) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.35; Tue, 18 Jun 2024 18:09:23 +0200 From: Olivier Moysan To: Nuno Sa , Olivier Moysan , Jonathan Cameron , Lars-Peter Clausen CC: , Subject: [PATCH 1/8] iio: add read raw service to iio backend framework Date: Tue, 18 Jun 2024 18:08:27 +0200 Message-ID: <20240618160836.945242-2-olivier.moysan@foss.st.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240618160836.945242-1-olivier.moysan@foss.st.com> References: <20240618160836.945242-1-olivier.moysan@foss.st.com> Precedence: bulk X-Mailing-List: linux-iio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: SHFCAS1NODE2.st.com (10.75.129.73) To SHFDAG1NODE1.st.com (10.75.129.69) X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-06-18_02,2024-06-17_01,2024-05-17_01 Add iio_backend_read_raw() service to support attributes read from an IIO backend. Signed-off-by: Olivier Moysan Reviewed-by: Nuno Sa --- drivers/iio/industrialio-backend.c | 16 ++++++++++++++++ include/linux/iio/backend.h | 3 +++ 2 files changed, 19 insertions(+) diff --git a/drivers/iio/industrialio-backend.c b/drivers/iio/industrialio-backend.c index 929aff4040ed..b950e30018ca 100644 --- a/drivers/iio/industrialio-backend.c +++ b/drivers/iio/industrialio-backend.c @@ -357,6 +357,22 @@ int devm_iio_backend_request_buffer(struct device *dev, } EXPORT_SYMBOL_NS_GPL(devm_iio_backend_request_buffer, IIO_BACKEND); +/** + * iio_backend_read_raw - Request a value from the backend. + * @back: Backend device + * @val: First element of the returned value + * @val2: Second element of the returned value + * @mask: Specify value to retrieve + * + * RETURNS: + * 0 on success, negative error number on failure. + */ +int iio_backend_read_raw(struct iio_backend *back, int *val, int *val2, long mask) +{ + return iio_backend_op_call(back, read_raw, val, val2, mask); +} +EXPORT_SYMBOL_NS_GPL(iio_backend_read_raw, IIO_BACKEND); + static struct iio_backend *iio_backend_from_indio_dev_parent(const struct device *dev) { struct iio_backend *back = ERR_PTR(-ENODEV), *iter; diff --git a/include/linux/iio/backend.h b/include/linux/iio/backend.h index 8099759d7242..cff486699054 100644 --- a/include/linux/iio/backend.h +++ b/include/linux/iio/backend.h @@ -81,6 +81,7 @@ enum iio_backend_sample_trigger { * @extend_chan_spec: Extend an IIO channel. * @ext_info_set: Extended info setter. * @ext_info_get: Extended info getter. + * @read_raw: Read value from a backend device **/ struct iio_backend_ops { int (*enable)(struct iio_backend *back); @@ -113,6 +114,7 @@ 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 (*read_raw)(struct iio_backend *back, int *val, int *val2, long mask); }; int iio_backend_chan_enable(struct iio_backend *back, unsigned int chan); @@ -141,6 +143,7 @@ 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_read_raw(struct iio_backend *back, int *val, int *val2, long mask); int iio_backend_extend_chan_spec(struct iio_dev *indio_dev, struct iio_backend *back,