From patchwork Sun Feb 17 14:29:10 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Artur Rojek X-Patchwork-Id: 10817065 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1423A6C2 for ; Sun, 17 Feb 2019 14:28:18 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0286D2A54A for ; Sun, 17 Feb 2019 14:28:18 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E8A6F2A557; Sun, 17 Feb 2019 14:28:17 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2A2D62A54A for ; Sun, 17 Feb 2019 14:28:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727522AbfBQO2Q (ORCPT ); Sun, 17 Feb 2019 09:28:16 -0500 Received: from relay8-d.mail.gandi.net ([217.70.183.201]:35817 "EHLO relay8-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725795AbfBQO2Q (ORCPT ); Sun, 17 Feb 2019 09:28:16 -0500 X-Originating-IP: 91.192.165.7 Received: from pc.localdomain (unknown [91.192.165.7]) (Authenticated sender: contact@artur-rojek.eu) by relay8-d.mail.gandi.net (Postfix) with ESMTPSA id 90A0F1BF207; Sun, 17 Feb 2019 14:28:11 +0000 (UTC) From: Artur Rojek To: Sebastian Reichel , Jonathan Cameron , Rob Herring , Mark Rutland Cc: linux-pm@vger.kernel.org, linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Paul Cercueil , Artur Rojek Subject: [PATCH 1/7] iio: inkern: API for reading available iio channel attribute values Date: Sun, 17 Feb 2019 15:29:10 +0100 Message-Id: <20190217142914.17433-1-contact@artur-rojek.eu> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Extend the inkern API with a function for reading available attribute values of iio channels. Signed-off-by: Artur Rojek Acked-by: Jonathan Cameron --- drivers/iio/inkern.c | 20 ++++++++++++++++++++ include/linux/iio/consumer.h | 14 ++++++++++++++ 2 files changed, 34 insertions(+) diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c index 06ca3f7fcc44..f19dbde3c945 100644 --- a/drivers/iio/inkern.c +++ b/drivers/iio/inkern.c @@ -733,6 +733,26 @@ static int iio_channel_read_avail(struct iio_channel *chan, vals, type, length, info); } +int iio_read_avail_channel_attribute(struct iio_channel *chan, + const int **vals, int *type, int *length, + enum iio_chan_info_enum attribute) +{ + int ret; + + mutex_lock(&chan->indio_dev->info_exist_lock); + if (!chan->indio_dev->info) { + ret = -ENODEV; + goto err_unlock; + } + + ret = iio_channel_read_avail(chan, vals, type, length, attribute); +err_unlock: + mutex_unlock(&chan->indio_dev->info_exist_lock); + + return ret; +} +EXPORT_SYMBOL_GPL(iio_read_avail_channel_attribute); + int iio_read_avail_channel_raw(struct iio_channel *chan, const int **vals, int *length) { diff --git a/include/linux/iio/consumer.h b/include/linux/iio/consumer.h index 9887f4f8e2a8..b2d34831ed7c 100644 --- a/include/linux/iio/consumer.h +++ b/include/linux/iio/consumer.h @@ -290,6 +290,20 @@ int iio_read_max_channel_raw(struct iio_channel *chan, int *val); int iio_read_avail_channel_raw(struct iio_channel *chan, const int **vals, int *length); +/** + * iio_read_avail_channel_attribute() - read available channel attribute values + * @chan: The channel being queried. + * @vals: Available values read back. + * @type: Type of values read back. + * @length: Number of entries in vals. + * @attribute: info attribute to be read back. + * + * Returns an error code, IIO_AVAIL_RANGE or IIO_AVAIL_LIST. + */ +int iio_read_avail_channel_attribute(struct iio_channel *chan, + const int **vals, int *type, int *length, + enum iio_chan_info_enum attribute); + /** * iio_get_channel_type() - get the type of a channel * @channel: The channel being queried.