From patchwork Tue Apr 14 09:11:55 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Juergen Borleis X-Patchwork-Id: 6214411 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id CD7669F1C4 for ; Tue, 14 Apr 2015 09:16:59 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id F10C820212 for ; Tue, 14 Apr 2015 09:16:58 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A4AD4201F5 for ; Tue, 14 Apr 2015 09:16:57 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1YhwvL-0003G1-IJ; Tue, 14 Apr 2015 09:14:27 +0000 Received: from metis.ext.pengutronix.de ([2001:6f8:1178:4:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1YhwtN-0001ds-9B for linux-arm-kernel@lists.infradead.org; Tue, 14 Apr 2015 09:12:32 +0000 Received: from dude.hi.pengutronix.de ([2001:67c:670:100:1d::7]) by metis.ext.pengutronix.de with esmtp (Exim 4.80) (envelope-from ) id 1Yhwsy-0004fV-3I; Tue, 14 Apr 2015 11:12:00 +0200 Received: from jbe by dude.hi.pengutronix.de with local (Exim 4.84) (envelope-from ) id 1Yhwsx-0005c1-IS; Tue, 14 Apr 2015 11:11:59 +0200 From: Juergen Borleis To: linux-kernel@vger.kernel.org Subject: [PATCH 4/5] RTC/i.MX/DryIce: when locked, do not fail silently Date: Tue, 14 Apr 2015 11:11:55 +0200 Message-Id: <1429002716-19821-5-git-send-email-jbe@pengutronix.de> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1429002716-19821-1-git-send-email-jbe@pengutronix.de> References: <1429002716-19821-1-git-send-email-jbe@pengutronix.de> X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::7 X-SA-Exim-Mail-From: jbe@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-arm-kernel@lists.infradead.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150414_021225_591135_EC35BC7C X-CRM114-Status: GOOD ( 13.79 ) X-Spam-Score: -0.0 (/) Cc: linux-arm-kernel@lists.infradead.org, Alessandro Zummo , Robert Schwebel , kernel@pengutronix.de, rtc-linux@googlegroups.com X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Signed-off-by: Juergen Borleis Signed-off-by: Robert Schwebel [rsc: got NDA clearance from Freescale] --- drivers/rtc/rtc-imxdi.c | 28 +++++++++++++++++++++++++--- 1 file changed, 25 insertions(+), 3 deletions(-) diff --git a/drivers/rtc/rtc-imxdi.c b/drivers/rtc/rtc-imxdi.c index b04c64f..de1a2e4 100644 --- a/drivers/rtc/rtc-imxdi.c +++ b/drivers/rtc/rtc-imxdi.c @@ -581,14 +581,36 @@ static int dryice_rtc_read_time(struct device *dev, struct rtc_time *tm) static int dryice_rtc_set_mmss(struct device *dev, unsigned long secs) { struct imxdi_dev *imxdi = dev_get_drvdata(dev); + u32 dcr, dsr; int rc; + dcr = __raw_readl(imxdi->ioaddr + DCR); + dsr = __raw_readl(imxdi->ioaddr + DSR); + + if (!(dcr & DCR_TCE) || (dsr & DSR_SVF)) { + if (dcr & DCR_TCHL) { + /* we are even more out of luck */ + di_what_is_to_be_done(imxdi, "battery"); + return -EPERM; + } + if ((dcr & DCR_TCSL) || (dsr & DSR_SVF)) { + /* we are out of luck for now */ + di_what_is_to_be_done(imxdi, "main"); + return -EPERM; + } + } + /* zero the fractional part first */ rc = di_write_wait(imxdi, 0, DTCLR); - if (rc == 0) - rc = di_write_wait(imxdi, secs, DTCMR); + if (rc != 0) + return rc; - return rc; + rc = di_write_wait(imxdi, secs, DTCMR); + if (rc != 0) + return rc; + + return di_write_wait(imxdi, __raw_readl(imxdi->ioaddr + DCR) | + DCR_TCE, DCR); } static int dryice_rtc_alarm_irq_enable(struct device *dev,