Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754225AbbDNJMO (ORCPT ); Tue, 14 Apr 2015 05:12:14 -0400 Received: from metis.ext.pengutronix.de ([92.198.50.35]:48931 "EHLO metis.ext.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753038AbbDNJMB (ORCPT ); Tue, 14 Apr 2015 05:12:01 -0400 From: Juergen Borleis To: linux-kernel@vger.kernel.org Cc: rtc-linux@googlegroups.com, kernel@pengutronix.de, Alessandro Zummo , linux-arm-kernel@lists.infradead.org, Robert Schwebel 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-kernel@vger.kernel.org Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1741 Lines: 59 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, -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/