From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 52E91C433FE for ; Mon, 18 Oct 2021 15:19:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3BB3760720 for ; Mon, 18 Oct 2021 15:19:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233332AbhJRPWA (ORCPT ); Mon, 18 Oct 2021 11:22:00 -0400 Received: from relay11.mail.gandi.net ([217.70.178.231]:36321 "EHLO relay11.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233262AbhJRPVy (ORCPT ); Mon, 18 Oct 2021 11:21:54 -0400 Received: (Authenticated sender: alexandre.belloni@bootlin.com) by relay11.mail.gandi.net (Postfix) with ESMTPSA id AB4B210000D; Mon, 18 Oct 2021 15:19:41 +0000 (UTC) From: Alexandre Belloni To: Alessandro Zummo , Alexandre Belloni Cc: linux-rtc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 4/7] rtc: add correction parameter Date: Mon, 18 Oct 2021 17:19:30 +0200 Message-Id: <20211018151933.76865-5-alexandre.belloni@bootlin.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211018151933.76865-1-alexandre.belloni@bootlin.com> References: <20211018151933.76865-1-alexandre.belloni@bootlin.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add a new parameter allowing the get and set the correction using ioctls instead of just sysfs. Signed-off-by: Alexandre Belloni --- drivers/rtc/dev.c | 19 +++++++++++++++++++ include/uapi/linux/rtc.h | 1 + 2 files changed, 20 insertions(+) diff --git a/drivers/rtc/dev.c b/drivers/rtc/dev.c index 143c097eff0f..abee1fc4705e 100644 --- a/drivers/rtc/dev.c +++ b/drivers/rtc/dev.c @@ -398,6 +398,16 @@ static long rtc_dev_ioctl(struct file *file, param.uvalue = rtc->features[0]; break; + case RTC_PARAM_CORRECTION: + mutex_unlock(&rtc->ops_lock); + if (param.index != 0) + return -EINVAL; + err = rtc_read_offset(rtc, &offset); + mutex_lock(&rtc->ops_lock); + if (err == 0) + param.svalue = offset; + break; + default: err = -EINVAL; } @@ -416,6 +426,15 @@ static long rtc_dev_ioctl(struct file *file, switch(param.param) { case RTC_PARAM_FEATURES: + err = -EINVAL; + break; + + case RTC_PARAM_CORRECTION: + mutex_unlock(&rtc->ops_lock); + if (param.index != 0) + return -EINVAL; + return rtc_set_offset(rtc, param.svalue); + default: err = -EINVAL; } diff --git a/include/uapi/linux/rtc.h b/include/uapi/linux/rtc.h index c83bb9a4fa4f..5debe82439c2 100644 --- a/include/uapi/linux/rtc.h +++ b/include/uapi/linux/rtc.h @@ -136,6 +136,7 @@ struct rtc_param { /* parameter list */ #define RTC_PARAM_FEATURES 0 +#define RTC_PARAM_CORRECTION 1 #define RTC_MAX_FREQ 8192 -- 2.31.1