From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mailout4.samsung.com ([203.254.224.34]:58330 "EHLO mailout4.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751570AbbHUBAl (ORCPT ); Thu, 20 Aug 2015 21:00:41 -0400 Message-id: <55D67838.6080902@samsung.com> Date: Fri, 21 Aug 2015 10:00:40 +0900 From: Joonyoung Shim MIME-version: 1.0 To: Krzysztof Kozlowski , Alexandre Belloni Cc: rtc-linux@googlegroups.com, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org, a.zummo@towertech.it, sbkim73@samsung.com Subject: Re: [PATCH] rtc: s5m: fix to update ctrl register References: <1439455764-23526-1-git-send-email-jy0922.shim@samsung.com> <20150820231551.GE3769@piout.net> <55D67487.3040503@samsung.com> In-reply-to: <55D67487.3040503@samsung.com> Content-type: text/plain; charset=windows-1252 Content-transfer-encoding: 7bit Sender: stable-owner@vger.kernel.org List-ID: On 08/21/2015 09:44 AM, Krzysztof Kozlowski wrote: > On 21.08.2015 08:15, Alexandre Belloni wrote: >> Hi, >> >> On 13/08/2015 at 17:49:24 +0900, Joonyoung Shim wrote : >>> According to datasheet, the S2MPS13X and S2MPS14X should update write >>> buffer via setting WUDR bit to high after ctrl register is updated. >>> >>> If not, ALARM interrupt of rtc-s5m doesn't happen first time when i use >>> tools/testing/selftests/timers/rtctest.c test program and hour format is >>> used to 12 hour mode in Odroid-XU3 board. >>> >> >> >From what I understood, I should expect a v2 of tihat patch also setting >> RUDR, is that right? OR would you prefer that I apply that one and then >> fix RUDR in a following patch? > > Right, I would expect that as well... or a comment if this is not needed. > Hmm, the driver only writes control register now, so i don't feel the need of patch setting RUDR for control register. > Best regards, > Krzysztof > > >> >>> Signed-off-by: Joonyoung Shim >>> Cc: >> >> can you update the stable tag with the kernel version introducing the >> issue? Sure, i think it should be v3.16. >> >>> --- >>> drivers/rtc/rtc-s5m.c | 12 ++++++++++++ >>> 1 file changed, 12 insertions(+) >> >>> diff --git a/drivers/rtc/rtc-s5m.c b/drivers/rtc/rtc-s5m.c >>> index 8c70d78..03828bb 100644 >>> --- a/drivers/rtc/rtc-s5m.c >>> +++ b/drivers/rtc/rtc-s5m.c >>> @@ -635,6 +635,18 @@ static int s5m8767_rtc_init_reg(struct s5m_rtc_info *info) >>> case S2MPS13X: >>> data[0] = (0 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT); >>> ret = regmap_write(info->regmap, info->regs->ctrl, data[0]); >>> + if (ret < 0) >>> + break; >>> + >>> + ret = regmap_update_bits(info->regmap, >>> + info->regs->rtc_udr_update, >>> + info->regs->rtc_udr_mask, >>> + info->regs->rtc_udr_mask); >> >> Very small indentation issue here, it should be aligned with the open >> parenthesis. OK, i will. Thanks.