From patchwork Fri Mar 27 22:34:37 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gwendal Grignou X-Patchwork-Id: 11463195 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 89CE313A4 for ; Fri, 27 Mar 2020 22:34:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 653DA20717 for ; Fri, 27 Mar 2020 22:34:56 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="nZqt3IRQ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727843AbgC0Wez (ORCPT ); Fri, 27 Mar 2020 18:34:55 -0400 Received: from mail-pg1-f193.google.com ([209.85.215.193]:40814 "EHLO mail-pg1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727829AbgC0Wez (ORCPT ); Fri, 27 Mar 2020 18:34:55 -0400 Received: by mail-pg1-f193.google.com with SMTP id t24so5263426pgj.7 for ; Fri, 27 Mar 2020 15:34:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=cygiXMhl15qCUoQzSdzcfGNuz13l6qpvDscRygVf1ic=; b=nZqt3IRQGdYufnzoOrJmLIYTAQccDO7n2b+z4Mc2wXhA3x9URxfnGcXPxklgM6vLQ8 hXm8L3SwAqa19ww7KqvSxtlcRQH0BpIIzWOLQVnm+rTrHygWf0kFHEhR4h8DUi4JlfsN 434HiMvvup6htLiPt73RyIC294WFvPSr9AV5E= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=cygiXMhl15qCUoQzSdzcfGNuz13l6qpvDscRygVf1ic=; b=X784F+UQZH+pjNswOMUAfEgvhBocbIqFDXkyRavynW6dPb1J5XZvqX7GCeNQQ/htYW Dy2gI0IhWUUx8k0EUM1ti4+IxiFzRxbdSrTTiWHXU3uBmbXo3gnzp4xBCtTx1sjqFSbs vGzkD6DL5/ZfD92tTZfbDGZO8/aa07vO7RN+joCQ4BHGlptMBw/S+FZpVBkUE1seOVxU RzLmEWEAeTr2CzAlrbJ2rkEEcwrszYgrqfqYNmXHUoBXFKjVlVqKcEJKBUD5665hDx2R 1+tOIehRooYDiBHorGspVndGvoFCnO4lm7LBH/GzOKQRKW4vNveEGSYnZEDWUrmdGyqR uayw== X-Gm-Message-State: ANhLgQ0HKzyTjCAjP8RETA0WLLtO+s4UFeJSGCKal4rZtZCyayqNUV0h 4M2rYNt9K5WsSC/rmVT6Iqttfg== X-Google-Smtp-Source: ADFU+vvcX6J9Ugh2o4X81n4+wBMCWFJmedzRhDkNd7oVayTVBqJ4mAlMn+oBovbNwOQC+ASgcgJJtQ== X-Received: by 2002:a62:cdcc:: with SMTP id o195mr1447680pfg.323.1585348493927; Fri, 27 Mar 2020 15:34:53 -0700 (PDT) Received: from localhost ([2620:15c:202:1:4cc0:7eee:97c9:3c1a]) by smtp.gmail.com with ESMTPSA id a15sm4869187pfg.77.2020.03.27.15.34.53 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 27 Mar 2020 15:34:53 -0700 (PDT) From: Gwendal Grignou To: bleung@chromium.org, enric.balletbo@collabora.com, Jonathan.Cameron@huawei.com Cc: linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, Gwendal Grignou Subject: [PATCH v7 06/12] iio: expose iio_device_set_clock Date: Fri, 27 Mar 2020 15:34:37 -0700 Message-Id: <20200327223443.6006-7-gwendal@chromium.org> X-Mailer: git-send-email 2.26.0.rc2.310.g2932bb562d-goog In-Reply-To: <20200327223443.6006-1-gwendal@chromium.org> References: <20200327223443.6006-1-gwendal@chromium.org> MIME-Version: 1.0 Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org Some IIO devices may want to override the default (realtime) to another clock source by default. It can beneficial when timestamps coming from the hardware or underlying drivers are already in that format. It can always be overridden by attribute current_timestamp_clock. Reviewed-by: Jonathan Cameron Signed-off-by: Gwendal Grignou --- No changes in v6 and v7. Changes in v5: - New in v5. drivers/iio/industrialio-core.c | 8 +++++++- include/linux/iio/iio.h | 2 ++ 2 files changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c index 65ff0d0670188..26e963483bab0 100644 --- a/drivers/iio/industrialio-core.c +++ b/drivers/iio/industrialio-core.c @@ -189,7 +189,12 @@ ssize_t iio_read_const_attr(struct device *dev, } EXPORT_SYMBOL(iio_read_const_attr); -static int iio_device_set_clock(struct iio_dev *indio_dev, clockid_t clock_id) +/** + * iio_device_set_clock() - Set current timestamping clock for the device + * @indio_dev: IIO device structure containing the device + * @clock_id: timestamping clock posix identifier to set. + */ +int iio_device_set_clock(struct iio_dev *indio_dev, clockid_t clock_id) { int ret; const struct iio_event_interface *ev_int = indio_dev->event_interface; @@ -207,6 +212,7 @@ static int iio_device_set_clock(struct iio_dev *indio_dev, clockid_t clock_id) return 0; } +EXPORT_SYMBOL(iio_device_set_clock); /** * iio_get_time_ns() - utility function to get a time stamp for events etc diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h index 862ce0019eba5..b18f34a8901f3 100644 --- a/include/linux/iio/iio.h +++ b/include/linux/iio/iio.h @@ -627,6 +627,8 @@ static inline clockid_t iio_device_get_clock(const struct iio_dev *indio_dev) return indio_dev->clock_id; } +int iio_device_set_clock(struct iio_dev *indio_dev, clockid_t clock_id); + /** * dev_to_iio_dev() - Get IIO device struct from a device struct * @dev: The device embedded in the IIO device