Received: by 2002:a05:6358:a55:b0:ec:fcf4:3ecf with SMTP id 21csp3164691rwb; Fri, 20 Jan 2023 12:07:10 -0800 (PST) X-Google-Smtp-Source: AMrXdXt93mtMUv2NjtAh1whvscGN5fhYm8GWV8ZA8Ln6eOBGvXm0nJcF0ma389+d08snJ9C5BsGk X-Received: by 2002:a05:6402:28cb:b0:49e:db43:1722 with SMTP id ef11-20020a05640228cb00b0049edb431722mr2719586edb.18.1674245230420; Fri, 20 Jan 2023 12:07:10 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1674245230; cv=none; d=google.com; s=arc-20160816; b=Tw6lI3JwAn5wxXaWpWTt8kkS5Ec7zuY3f5W3BNN/hrityo1J4UtdwBbUuFsZcZK/ca Y6uU7HgJIDOOcWhzITPQM0JFl0F9UK14YFE3Tyyu2dfmt912rAdka2hF8+zVxo6stIpr nkaTL3PKLQB206f9pG/cjt/Osgu53ea8Wz6pLlo1JP3ge45Wbkn2GYKFz4Ce8O/9y6OB DjgvOS57hrhHBYJ92kc2+PrGJh3pyQp+SuetX/uFK4c+a6vlWBCeIf04oNlbfIS5okta RVaqJH5HrblkWfx68NJqAeMYWu4LbP0WTM3ZdLN+Z9x3shH17McPi296THhwbEvXrgZG N83Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:in-reply-to:content-disposition:mime-version :references:message-id:subject:cc:to:from:date:dkim-signature; bh=qYYcMi8M2SstQ9kQS8OvJk5vcsSwdKVjKYpbhTa3riA=; b=R2EIPgoUX4VO2pZqisB8HhhiVsTLi37uT5oq8NPh0pklox6AilidMrsiUqzkYeHLj6 ZnMdOXhgUZEjMKFTQVAPZTH5FuIvi3NUy0I3M5ZvYpu3i/gApUUzDVLvOFSElI2uYKpW 2/emgNmLHv/6uhM6jJheIK8m8YvnYWAHfv6y++3uhbAxZuva8OHI4tNVIpS3cGoBDa8W gBn8ZnvbFxhplH1uyZ1/UufnB43h5LZ+u5VvTuAfjACAj7RRCJoeJcmFY4FaDRi1BTjD MCWQ2vKyQpf9yxPnEjzIofwacg1jacv1mMDBp7/B6ry+GtOUaKfZRZJ04LgGbbzLznd4 mM1A== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@bootlin.com header.s=gm1 header.b=TuKOMCa1; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=bootlin.com Return-Path: Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id h11-20020aa7c94b000000b00498d00b6e05si34987921edt.58.2023.01.20.12.06.57; Fri, 20 Jan 2023 12:07:10 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@bootlin.com header.s=gm1 header.b=TuKOMCa1; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=bootlin.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230108AbjATSsS (ORCPT + 50 others); Fri, 20 Jan 2023 13:48:18 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54314 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230152AbjATSsR (ORCPT ); Fri, 20 Jan 2023 13:48:17 -0500 Received: from relay4-d.mail.gandi.net (relay4-d.mail.gandi.net [217.70.183.196]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 73FA89754; Fri, 20 Jan 2023 10:47:59 -0800 (PST) Received: (Authenticated sender: alexandre.belloni@bootlin.com) by mail.gandi.net (Postfix) with ESMTPSA id 375F7E0004; Fri, 20 Jan 2023 18:47:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1674240478; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=qYYcMi8M2SstQ9kQS8OvJk5vcsSwdKVjKYpbhTa3riA=; b=TuKOMCa1+/AyB41Jnwlt/qvw9K1FxPNLSWr8Q4UxXFos7tOohVCi81FbYdQhkStarOaY5Y Mn0Mh8BVQltI0xt157IKYThdI+B18IPkI8uBc+fdWdeZpv19h6LUwvzupzStE4wKNTeTC+ 8zADLxwfcKY4ziezobvD9e4OvQlVgsdjXVnzD/evSo8H6a94gZPh1oUUavJIc7vNg5qM/K knGrzsqQzdfH0Q/8H/D4bi2jJMHFLblU4VliooKmqkGCA7GjFAFJsbU4lEtmxf3xFO+3IE uUEq78Yp+XzGTW0BMeYeIFX/sPyA0WnG+QMcvFAEG0oO70mNWUPX74TmTAj1SA== Date: Fri, 20 Jan 2023 19:47:53 +0100 From: Alexandre Belloni To: Hugo Villeneuve Cc: a.zummo@towertech.it, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, linux-rtc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Hugo Villeneuve Subject: Re: [PATCH v3 02/14] rtc: pcf2127: adapt for time/date registers at any offset Message-ID: References: <20221215150214.1109074-1-hugo@hugovil.com> <20221215150214.1109074-3-hugo@hugovil.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20221215150214.1109074-3-hugo@hugovil.com> X-Spam-Status: No, score=-2.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 15/12/2022 10:02:03-0500, Hugo Villeneuve wrote: > From: Hugo Villeneuve > > This will simplify the implementation of new variants into this driver. > > Some variants (PCF2131) have a 100th seconds register. This register is > currently not supported in this driver. > > Signed-off-by: Hugo Villeneuve > --- > drivers/rtc/rtc-pcf2127.c | 68 ++++++++++++++++++++++----------------- > 1 file changed, 39 insertions(+), 29 deletions(-) > > diff --git a/drivers/rtc/rtc-pcf2127.c b/drivers/rtc/rtc-pcf2127.c > index b9a5d47a439f..fb0caacaabee 100644 > --- a/drivers/rtc/rtc-pcf2127.c > +++ b/drivers/rtc/rtc-pcf2127.c > @@ -44,14 +44,17 @@ > #define PCF2127_BIT_CTRL3_BF BIT(3) > #define PCF2127_BIT_CTRL3_BTSE BIT(4) > /* Time and date registers */ > -#define PCF2127_REG_SC 0x03 > +#define PCF2127_REG_TIME_DATE_BASE 0x03 > +/* Time and date registers offsets (starting from base register) */ > +#define PCF2127_OFFSET_TD_SC 0 > +#define PCF2127_OFFSET_TD_MN 1 > +#define PCF2127_OFFSET_TD_HR 2 > +#define PCF2127_OFFSET_TD_DM 3 > +#define PCF2127_OFFSET_TD_DW 4 > +#define PCF2127_OFFSET_TD_MO 5 > +#define PCF2127_OFFSET_TD_YR 6 Same comment as for the alarms, I would simply remove the defines as they don't really carry any useful information. > +/* Time and date registers bits */ > #define PCF2127_BIT_SC_OSF BIT(7) > -#define PCF2127_REG_MN 0x04 > -#define PCF2127_REG_HR 0x05 > -#define PCF2127_REG_DM 0x06 > -#define PCF2127_REG_DW 0x07 > -#define PCF2127_REG_MO 0x08 > -#define PCF2127_REG_YR 0x09 > /* Alarm registers */ > #define PCF2127_REG_ALARM_SC 0x0A > #define PCF2127_REG_ALARM_MN 0x0B > @@ -106,6 +109,7 @@ struct pcf21xx_config { > int max_register; > unsigned int has_nvmem:1; > unsigned int has_bit_wd_ctl_cd0:1; > + u8 regs_td_base; /* Time/data base registers. */ > }; > > struct pcf2127 { > @@ -125,27 +129,31 @@ struct pcf2127 { > static int pcf2127_rtc_read_time(struct device *dev, struct rtc_time *tm) > { > struct pcf2127 *pcf2127 = dev_get_drvdata(dev); > - unsigned char buf[10]; > + unsigned char buf[7]; > + unsigned int ctrl3; > int ret; > > /* > * Avoid reading CTRL2 register as it causes WD_VAL register > * value to reset to 0 which means watchdog is stopped. > */ > - ret = regmap_bulk_read(pcf2127->regmap, PCF2127_REG_CTRL3, > - (buf + PCF2127_REG_CTRL3), > - ARRAY_SIZE(buf) - PCF2127_REG_CTRL3); > - if (ret) { > - dev_err(dev, "%s: read error\n", __func__); > + ret = regmap_read(pcf2127->regmap, PCF2127_REG_CTRL3, &ctrl3); > + if (ret) > return ret; > - } > > - if (buf[PCF2127_REG_CTRL3] & PCF2127_BIT_CTRL3_BLF) > + if (ctrl3 & PCF2127_BIT_CTRL3_BLF) > dev_info(dev, > "low voltage detected, check/replace RTC battery.\n"); > > + ret = regmap_bulk_read(pcf2127->regmap, pcf2127->cfg->regs_td_base, > + buf, sizeof(buf)); > + if (ret) { > + dev_err(dev, "%s: read error\n", __func__); > + return ret; > + } > + > /* Clock integrity is not guaranteed when OSF flag is set. */ > - if (buf[PCF2127_REG_SC] & PCF2127_BIT_SC_OSF) { > + if (buf[PCF2127_OFFSET_TD_SC] & PCF2127_BIT_SC_OSF) { > /* > * no need clear the flag here, > * it will be cleared once the new date is saved > @@ -158,18 +166,18 @@ static int pcf2127_rtc_read_time(struct device *dev, struct rtc_time *tm) > dev_dbg(dev, > "%s: raw data is cr3=%02x, sec=%02x, min=%02x, hr=%02x, " > "mday=%02x, wday=%02x, mon=%02x, year=%02x\n", > - __func__, buf[PCF2127_REG_CTRL3], buf[PCF2127_REG_SC], > - buf[PCF2127_REG_MN], buf[PCF2127_REG_HR], > - buf[PCF2127_REG_DM], buf[PCF2127_REG_DW], > - buf[PCF2127_REG_MO], buf[PCF2127_REG_YR]); > - > - tm->tm_sec = bcd2bin(buf[PCF2127_REG_SC] & 0x7F); > - tm->tm_min = bcd2bin(buf[PCF2127_REG_MN] & 0x7F); > - tm->tm_hour = bcd2bin(buf[PCF2127_REG_HR] & 0x3F); /* rtc hr 0-23 */ > - tm->tm_mday = bcd2bin(buf[PCF2127_REG_DM] & 0x3F); > - tm->tm_wday = buf[PCF2127_REG_DW] & 0x07; > - tm->tm_mon = bcd2bin(buf[PCF2127_REG_MO] & 0x1F) - 1; /* rtc mn 1-12 */ > - tm->tm_year = bcd2bin(buf[PCF2127_REG_YR]); > + __func__, ctrl3, buf[PCF2127_OFFSET_TD_SC], > + buf[PCF2127_OFFSET_TD_MN], buf[PCF2127_OFFSET_TD_HR], > + buf[PCF2127_OFFSET_TD_DM], buf[PCF2127_OFFSET_TD_DW], > + buf[PCF2127_OFFSET_TD_MO], buf[PCF2127_OFFSET_TD_YR]); > + > + tm->tm_sec = bcd2bin(buf[PCF2127_OFFSET_TD_SC] & 0x7F); > + tm->tm_min = bcd2bin(buf[PCF2127_OFFSET_TD_MN] & 0x7F); > + tm->tm_hour = bcd2bin(buf[PCF2127_OFFSET_TD_HR] & 0x3F); /* rtc hr 0-23 */ You can drop the comment > + tm->tm_mday = bcd2bin(buf[PCF2127_OFFSET_TD_DM] & 0x3F); > + tm->tm_wday = buf[PCF2127_OFFSET_TD_DW] & 0x07; > + tm->tm_mon = bcd2bin(buf[PCF2127_OFFSET_TD_MO] & 0x1F) - 1; /* rtc mn 1-12 */ This comment too. > + tm->tm_year = bcd2bin(buf[PCF2127_OFFSET_TD_YR]); > tm->tm_year += 100; > > dev_dbg(dev, "%s: tm is secs=%d, mins=%d, hours=%d, " > @@ -207,7 +215,7 @@ static int pcf2127_rtc_set_time(struct device *dev, struct rtc_time *tm) > buf[i++] = bin2bcd(tm->tm_year - 100); > > /* write register's data */ > - err = regmap_bulk_write(pcf2127->regmap, PCF2127_REG_SC, buf, i); > + err = regmap_bulk_write(pcf2127->regmap, pcf2127->cfg->regs_td_base, buf, i); > if (err) { > dev_err(dev, > "%s: err=%d", __func__, err); > @@ -650,11 +658,13 @@ static struct pcf21xx_config pcf21xx_cfg[] = { > .max_register = 0x1d, > .has_nvmem = 1, > .has_bit_wd_ctl_cd0 = 1, > + .regs_td_base = PCF2127_REG_TIME_DATE_BASE, > }, > [PCF2129] = { > .max_register = 0x19, > .has_nvmem = 0, > .has_bit_wd_ctl_cd0 = 0, > + .regs_td_base = PCF2127_REG_TIME_DATE_BASE, > }, > }; > > -- > 2.30.2 > -- Alexandre Belloni, co-owner and COO, Bootlin Embedded Linux and Kernel engineering https://bootlin.com