From patchwork Tue Sep 5 06:03:41 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mia Lin X-Patchwork-Id: 1829772 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20221208 header.b=hgXGES5Y; dkim-atps=neutral Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=112.213.38.117; helo=lists.ozlabs.org; envelope-from=openbmc-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org; receiver=patchwork.ozlabs.org) Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (secp384r1) server-digest SHA384) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4Rfw2s6Xdcz1ygx for ; Tue, 5 Sep 2023 16:05:09 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20221208 header.b=hgXGES5Y; dkim-atps=neutral Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4Rfw2q6XFWz3c7Q for ; Tue, 5 Sep 2023 16:05:07 +1000 (AEST) X-Original-To: openbmc@lists.ozlabs.org Delivered-To: openbmc@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20221208 header.b=hgXGES5Y; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=gmail.com (client-ip=2607:f8b0:4864:20::632; helo=mail-pl1-x632.google.com; envelope-from=mimi05633@gmail.com; receiver=lists.ozlabs.org) Received: from mail-pl1-x632.google.com (mail-pl1-x632.google.com [IPv6:2607:f8b0:4864:20::632]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4Rfw1S1xhSz2yPG for ; Tue, 5 Sep 2023 16:03:55 +1000 (AEST) Received: by mail-pl1-x632.google.com with SMTP id d9443c01a7336-1bf1935f6c2so13253275ad.1 for ; Mon, 04 Sep 2023 23:03:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1693893833; x=1694498633; darn=lists.ozlabs.org; h=references:in-reply-to:message-id:date:subject:cc:to:from:from:to :cc:subject:date:message-id:reply-to; bh=L5PEbd1VHK64XWZhTC2X/gEOqeuCyXsQqfB44JXU490=; b=hgXGES5YE94ICQnqHqhN0ljzIGGoSMOTCPQBVLw45RxnZz8a6pg8clM1hqwF7b/uZy ZGMrCFLiD6r++sW5lWx9k5B9zOIoZ141kyBkffMJ/gxcHZT8QnrCh+lZksg9WtPxLbrG 1HB+t+RQ3UTo7BA37MM99nbsSLdm/r4L/oWuWqMIgnxeNU+27Gep8J//BCYQRiKyLN6L VlHiiLIiQ+VKgsO5u15Vgm3Lgh7qZJo6SvYxat9miNHri3y4ivrvKFLFlPnMcWFVVni4 WumoA2heG6uthBCubaF9I7GX6MeIqs5IrVP284xNgjdDy2zo2HEpsE/oscuHEsbg58Rp b2jA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1693893833; x=1694498633; h=references:in-reply-to:message-id:date:subject:cc:to:from :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=L5PEbd1VHK64XWZhTC2X/gEOqeuCyXsQqfB44JXU490=; b=J+9coHN5COSI4V6rRuLq/8tgM1+7ooobI5abVsb1L8NXHzDXU1H64IOz2/PVPYtwks kzcb4S7fzMo6tin5iZiGzsXFSa+2ORhQSB7sMJv/jAPKX5JLLzleQYDiCw4JO3ex6O7m GAqY66iKYTnH7ehgmyXpThuA5BmBq733CkpgNhjozb0EESRbDb+OtUQvY0FoK966ynqN 2bfZ2H9nqBcR6x3s8C8GCemJsLxKuLxfvITdM0BkwpYeU7X/tLSl5u+1pGONgQWApVcU Y3q8GkAvtIA/Dx63k1Gd/1n0as/bjvoCXba5EPj2mejap/p1NJNPbh4mJB9CAsfGkSv3 a0cw== X-Gm-Message-State: AOJu0YzJVToPJYRPV4Z8S9fgNfDKpt66xNqELR52TIqfy8SrhWg8Pt5X 0D5BWMYcyxLCAHXY5P0gCPc= X-Google-Smtp-Source: AGHT+IE+/QXBCVgNaoxXd0GZy0FpE1x5XcdsDEJ289scS9qJQLTVO6x6Wc4OxTP9lQ+sVRNllIl4Kw== X-Received: by 2002:a17:902:c409:b0:1c0:af36:e178 with SMTP id k9-20020a170902c40900b001c0af36e178mr18994695plk.11.1693893832926; Mon, 04 Sep 2023 23:03:52 -0700 (PDT) Received: from localhost.localdomain (60-250-192-107.hinet-ip.hinet.net. [60.250.192.107]) by smtp.gmail.com with ESMTPSA id t18-20020a170902d21200b001bf6ea340b3sm8482921ply.116.2023.09.04.23.03.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 04 Sep 2023 23:03:52 -0700 (PDT) From: Mia Lin To: avifishman70@gmail.com, tmaimon77@gmail.com, tali.perry1@gmail.com, venture@google.com, yuenn@google.com, benjaminfair@google.com, a.zummo@towertech.it, alexandre.belloni@bootlin.com, KWLIU@nuvoton.com, JJLIU0@nuvoton.com, KFLIN@nuvoton.com, mylin1@nuvoton.com Subject: [PATCH v5 1/1] rtc: nuvoton: Compatible with NCT3015Y-R and NCT3018Y-R Date: Tue, 5 Sep 2023 14:03:41 +0800 Message-Id: <20230905060341.5632-2-mimi05633@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230905060341.5632-1-mimi05633@gmail.com> References: <20230905060341.5632-1-mimi05633@gmail.com> X-BeenThere: openbmc@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Development list for OpenBMC List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-rtc@vger.kernel.org, openbmc@lists.ozlabs.org, Mia Lin , linux-kernel@vger.kernel.org Errors-To: openbmc-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "openbmc" The NCT3015Y-R and NCT3018Y-R use the same datasheet but have different topologies as follows. - Topology (Only 1st i2c can set TWO bit and HF bit) In NCT3015Y-R, rtc 1st i2c is connected to a host CPU rtc 2nd i2c is connected to a BMC In NCT3018Y-R, rtc 1st i2c is connected to a BMC rtc 2nd i2c is connected to a host CPU In order to be compatible with NCT3015Y-R and NCT3018Y-R, - In probe, If part number is NCT3018Y-R, only set HF bit to 24-Hour format. Else, do nothing - In set_time, If part number is NCT3018Y-R && TWO bit is 0, change TWO bit to 1, and restore TWO bit after updating time. - Refine error messages to pinpoint the correct location. Signed-off-by: Mia Lin --- drivers/rtc/rtc-nct3018y.c | 87 ++++++++++++++++++++++++++++---------- 1 file changed, 64 insertions(+), 23 deletions(-) diff --git a/drivers/rtc/rtc-nct3018y.c b/drivers/rtc/rtc-nct3018y.c index a4e3f924837e..9ec20f241e15 100644 --- a/drivers/rtc/rtc-nct3018y.c +++ b/drivers/rtc/rtc-nct3018y.c @@ -23,6 +23,7 @@ #define NCT3018Y_REG_CTRL 0x0A /* timer control */ #define NCT3018Y_REG_ST 0x0B /* status */ #define NCT3018Y_REG_CLKO 0x0C /* clock out */ +#define NCT3018Y_REG_PART 0x21 /* part info */ #define NCT3018Y_BIT_AF BIT(7) #define NCT3018Y_BIT_ST BIT(7) @@ -37,6 +38,7 @@ #define NCT3018Y_REG_BAT_MASK 0x07 #define NCT3018Y_REG_CLKO_F_MASK 0x03 /* frequenc mask */ #define NCT3018Y_REG_CLKO_CKE 0x80 /* clock out enabled */ +#define NCT3018Y_REG_PART_NCT3018Y 0x02 struct nct3018y { struct rtc_device *rtc; @@ -46,6 +48,8 @@ struct nct3018y { #endif }; +static int part_num; + static int nct3018y_set_alarm_mode(struct i2c_client *client, bool on) { int err, flags; @@ -55,7 +59,7 @@ static int nct3018y_set_alarm_mode(struct i2c_client *client, bool on) flags = i2c_smbus_read_byte_data(client, NCT3018Y_REG_CTRL); if (flags < 0) { dev_dbg(&client->dev, - "Failed to read NCT3018Y_REG_CTRL\n"); + "%s: Failed to read ctrl reg.\n", __func__); return flags; } @@ -67,21 +71,21 @@ static int nct3018y_set_alarm_mode(struct i2c_client *client, bool on) flags |= NCT3018Y_BIT_CIE; err = i2c_smbus_write_byte_data(client, NCT3018Y_REG_CTRL, flags); if (err < 0) { - dev_dbg(&client->dev, "Unable to write NCT3018Y_REG_CTRL\n"); + dev_dbg(&client->dev, "%s: Unable to write ctrl reg.\n", __func__); return err; } flags = i2c_smbus_read_byte_data(client, NCT3018Y_REG_ST); if (flags < 0) { dev_dbg(&client->dev, - "Failed to read NCT3018Y_REG_ST\n"); + "%s: Failed to read status reg.\n", __func__); return flags; } flags &= ~(NCT3018Y_BIT_AF); err = i2c_smbus_write_byte_data(client, NCT3018Y_REG_ST, flags); if (err < 0) { - dev_dbg(&client->dev, "Unable to write NCT3018Y_REG_ST\n"); + dev_dbg(&client->dev, "%s: Unable to write status reg.\n", __func__); return err; } @@ -155,7 +159,7 @@ static int nct3018y_rtc_read_time(struct device *dev, struct rtc_time *tm) return err; if (!buf[0]) { - dev_dbg(&client->dev, " voltage <=1.7, date/time is not reliable.\n"); + dev_dbg(&client->dev, "%s: voltage <=1.7, date/time is not reliable.\n", __func__); return -EINVAL; } @@ -178,26 +182,44 @@ static int nct3018y_rtc_set_time(struct device *dev, struct rtc_time *tm) { struct i2c_client *client = to_i2c_client(dev); unsigned char buf[4] = {0}; - int err; + int err, flags; + int restore_flags = 0; + + flags = i2c_smbus_read_byte_data(client, NCT3018Y_REG_CTRL); + if (flags < 0) { + dev_dbg(&client->dev, "%s: Failed to read ctrl reg.\n", __func__); + return flags; + } + + /* Check and set TWO bit */ + if ((part_num & NCT3018Y_REG_PART_NCT3018Y) && !(flags & NCT3018Y_BIT_TWO)) { + restore_flags = 1; + flags |= NCT3018Y_BIT_TWO; + err = i2c_smbus_write_byte_data(client, NCT3018Y_REG_CTRL, flags); + if (err < 0) { + dev_dbg(&client->dev, "%s: Unable to write ctrl reg.\n", __func__); + return err; + } + } buf[0] = bin2bcd(tm->tm_sec); err = i2c_smbus_write_byte_data(client, NCT3018Y_REG_SC, buf[0]); if (err < 0) { - dev_dbg(&client->dev, "Unable to write NCT3018Y_REG_SC\n"); + dev_dbg(&client->dev, "%s: Unable to write seconds reg.\n", __func__); return err; } buf[0] = bin2bcd(tm->tm_min); err = i2c_smbus_write_byte_data(client, NCT3018Y_REG_MN, buf[0]); if (err < 0) { - dev_dbg(&client->dev, "Unable to write NCT3018Y_REG_MN\n"); + dev_dbg(&client->dev, "%s: Unable to write minutes reg.\n", __func__); return err; } buf[0] = bin2bcd(tm->tm_hour); err = i2c_smbus_write_byte_data(client, NCT3018Y_REG_HR, buf[0]); if (err < 0) { - dev_dbg(&client->dev, "Unable to write NCT3018Y_REG_HR\n"); + dev_dbg(&client->dev, "%s: Unable to write hour reg.\n", __func__); return err; } @@ -208,10 +230,22 @@ static int nct3018y_rtc_set_time(struct device *dev, struct rtc_time *tm) err = i2c_smbus_write_i2c_block_data(client, NCT3018Y_REG_DW, sizeof(buf), buf); if (err < 0) { - dev_dbg(&client->dev, "Unable to write for day and mon and year\n"); + dev_dbg(&client->dev, "%s: Unable to write for day and mon and year.\n", __func__); return -EIO; } + /* Restore TWO bit */ + if (restore_flags) { + if (part_num & NCT3018Y_REG_PART_NCT3018Y) + flags &= ~NCT3018Y_BIT_TWO; + + err = i2c_smbus_write_byte_data(client, NCT3018Y_REG_CTRL, flags); + if (err < 0) { + dev_dbg(&client->dev, "%s: Unable to write ctrl reg.\n", __func__); + return err; + } + } + return err; } @@ -224,7 +258,7 @@ static int nct3018y_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *tm) err = i2c_smbus_read_i2c_block_data(client, NCT3018Y_REG_SCA, sizeof(buf), buf); if (err < 0) { - dev_dbg(&client->dev, "Unable to read date\n"); + dev_dbg(&client->dev, "%s: Unable to read date.\n", __func__); return -EIO; } @@ -257,19 +291,19 @@ static int nct3018y_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *tm) err = i2c_smbus_write_byte_data(client, NCT3018Y_REG_SCA, bin2bcd(tm->time.tm_sec)); if (err < 0) { - dev_dbg(&client->dev, "Unable to write NCT3018Y_REG_SCA\n"); + dev_dbg(&client->dev, "%s: Unable to write seconds alarm reg.\n", __func__); return err; } err = i2c_smbus_write_byte_data(client, NCT3018Y_REG_MNA, bin2bcd(tm->time.tm_min)); if (err < 0) { - dev_dbg(&client->dev, "Unable to write NCT3018Y_REG_MNA\n"); + dev_dbg(&client->dev, "%s: Unable to write minutes alarm reg.\n", __func__); return err; } err = i2c_smbus_write_byte_data(client, NCT3018Y_REG_HRA, bin2bcd(tm->time.tm_hour)); if (err < 0) { - dev_dbg(&client->dev, "Unable to write NCT3018Y_REG_HRA\n"); + dev_dbg(&client->dev, "%s: Unable to write hour alarm reg.\n", __func__); return err; } @@ -473,23 +507,29 @@ static int nct3018y_probe(struct i2c_client *client) flags = i2c_smbus_read_byte_data(client, NCT3018Y_REG_CTRL); if (flags < 0) { - dev_dbg(&client->dev, "%s: read error\n", __func__); + dev_dbg(&client->dev, "%s: Failed to read ctrl reg.\n", __func__); return flags; } else if (flags & NCT3018Y_BIT_TWO) { - dev_dbg(&client->dev, "%s: NCT3018Y_BIT_TWO is set\n", __func__); + dev_dbg(&client->dev, "%s: TWO bit is set.\n", __func__); } - flags = NCT3018Y_BIT_TWO; - err = i2c_smbus_write_byte_data(client, NCT3018Y_REG_CTRL, flags); - if (err < 0) { - dev_dbg(&client->dev, "Unable to write NCT3018Y_REG_CTRL\n"); - return err; + part_num = i2c_smbus_read_byte_data(client, NCT3018Y_REG_PART); + if (part_num < 0) { + dev_dbg(&client->dev, "%s: Failed to read part info reg.\n", __func__); + return part_num; + } else if (part_num & NCT3018Y_REG_PART_NCT3018Y) { + flags = NCT3018Y_BIT_HF; + err = i2c_smbus_write_byte_data(client, NCT3018Y_REG_CTRL, flags); + if (err < 0) { + dev_dbg(&client->dev, "%s: Unable to write ctrl reg.\n", __func__); + return err; + } } flags = 0; err = i2c_smbus_write_byte_data(client, NCT3018Y_REG_ST, flags); if (err < 0) { - dev_dbg(&client->dev, "%s: write error\n", __func__); + dev_dbg(&client->dev, "%s: Failed to clear status reg.\n", __func__); return err; } @@ -507,7 +547,8 @@ static int nct3018y_probe(struct i2c_client *client) IRQF_ONESHOT | IRQF_TRIGGER_FALLING, "nct3018y", client); if (err) { - dev_dbg(&client->dev, "unable to request IRQ %d\n", client->irq); + dev_dbg(&client->dev, "%s: Unable to request IRQ %d.\n", + __func__, client->irq); return err; } } else {