From patchwork Tue Jan 3 07:47:41 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jacky Bai X-Patchwork-Id: 639115 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 09454C3DA7D for ; Tue, 3 Jan 2023 07:46:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236932AbjACHqt (ORCPT ); Tue, 3 Jan 2023 02:46:49 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56688 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236919AbjACHqr (ORCPT ); Tue, 3 Jan 2023 02:46:47 -0500 Received: from EUR01-DB5-obe.outbound.protection.outlook.com (mail-db5eur01on2059.outbound.protection.outlook.com [40.107.15.59]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 27C70B11; Mon, 2 Jan 2023 23:46:46 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=HkyKHDcQSc82sl2gv9+/1pavceOUaxswbE1rDtiSqXWliLagytZllkZBOVFY8uPkCSKJG3iR2dDAO9BYIb+DH0dBrXkSa/hiylD0yk0Q5+56XrHdjfUNfYEEI6tRpeBR1z6tcL05Snr2ETu60Pc2Q4i7r4E9KDxc9ENvcGkOMWZ6mb7kcCN2WXEynBw2P3sq+vCzNc6NOugt9I13s2nMjuEUaGPKKWA/PwyVE1mIxBH9dGuQTEoJIZtXaTgnXR23bLlRjk/qivTNijbSXdRCBYLNc/OkFYDDM09TwQzFw2W2emtC87mzuHx7xrvlBkZX4dEMJxGCXu9mt92tNw0iWg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=bPmW5jEtR3yiiG7i5iwd4O53CG7/MlqzIZGn3troHEU=; b=i+rWTnc2SEaR5qPcMWjdgoWgyRfgouWbYyxiK+urJRuDu4Tv6fxDLL0WjcGOllDaBz3bX8gUTAq6qj3pmBX696BLL/Q0BrgRLWQgRfkbqGdpPStzEZMuPmD58C0Hwc94cJRx3ih7u7pO3ce/pdInQPDynqastDBJl0crPbfPV+lagxjIum6r0hkGNWMG40C5dXrvfgF4krq3OTZjbk0Omdu/NSG/y8+aNGEv+ypGVEi+2+W50RheOBUAGYoNGbVRv8HxLpQNJC/IT9mqK6npNAojtqwePLLY7Sd4In3FcqfHjtNRxFHnYhZInj6uNniC5VPN/F8OZuMFH/PFFMEK0w== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nxp.com; dmarc=pass action=none header.from=nxp.com; dkim=pass header.d=nxp.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nxp.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=bPmW5jEtR3yiiG7i5iwd4O53CG7/MlqzIZGn3troHEU=; b=i9CeyFHTjzqrZsn1D35WZsPesJ7ZcwiLtKkyS6Su1PlLFvnlg2aueicW3/FBsaE5UpmY2pSe0ucjj2w8Zc7QPhkDp/HRSbnHRrrJwlt3J38t2JMUINb3SJM+6JxT85TgN2u8yRthEp6D7IIeB6e7jJk6BAhP6g52OEqVHqh8bY4= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nxp.com; Received: from AM9PR04MB8650.eurprd04.prod.outlook.com (2603:10a6:20b:43d::18) by VI1PR04MB6894.eurprd04.prod.outlook.com (2603:10a6:803:13a::15) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5944.19; Tue, 3 Jan 2023 07:46:43 +0000 Received: from AM9PR04MB8650.eurprd04.prod.outlook.com ([fe80::286e:e16f:828f:f4ce]) by AM9PR04MB8650.eurprd04.prod.outlook.com ([fe80::286e:e16f:828f:f4ce%8]) with mapi id 15.20.5944.019; Tue, 3 Jan 2023 07:46:43 +0000 From: Jacky Bai To: lee@kernel.org, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, shawnguo@kernel.org, s.hauer@pengutronix.de, dmitry.torokhov@gmail.com, a.zummo@towertech.it, alexandre.belloni@bootlin.com Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-input@vger.kernel.org, linux-rtc@vger.kernel.org, kernel@pengutronix.de, linux-imx@nxp.com, festevam@gmail.com Subject: [PATCH v3 3/4] rtc: bbnsm: Add the bbnsm rtc support Date: Tue, 3 Jan 2023 15:47:41 +0800 Message-Id: <20230103074742.2324924-4-ping.bai@nxp.com> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20230103074742.2324924-1-ping.bai@nxp.com> References: <20230103074742.2324924-1-ping.bai@nxp.com> X-ClientProxiedBy: SG2PR02CA0020.apcprd02.prod.outlook.com (2603:1096:3:17::32) To AM9PR04MB8650.eurprd04.prod.outlook.com (2603:10a6:20b:43d::18) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AM9PR04MB8650:EE_|VI1PR04MB6894:EE_ X-MS-Office365-Filtering-Correlation-Id: 81829650-5be5-4627-dcc6-08daed5ea849 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:AM9PR04MB8650.eurprd04.prod.outlook.com; PTR:; CAT:NONE; SFS:(13230022)(4636009)(396003)(136003)(376002)(346002)(366004)(39860400002)(451199015)(8936002)(41300700001)(2906002)(8676002)(38100700002)(66946007)(1076003)(38350700002)(7416002)(83380400001)(66476007)(5660300002)(66556008)(4326008)(186003)(478600001)(6512007)(26005)(2616005)(316002)(6486002)(52116002)(36756003)(6506007)(86362001)(22166006); DIR:OUT; SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 81829650-5be5-4627-dcc6-08daed5ea849 X-MS-Exchange-CrossTenant-AuthSource: AM9PR04MB8650.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Jan 2023 07:46:43.5436 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: hdmCqbE6u5lidDpL0trg8rGgmaGa12/VvmkB+JwyxV7gU7IAFyLFXOTFFGYCBkO2Najg0gsuwQlpd5+XozXhvw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR04MB6894 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org The BBNSM module includes a real time counter with alarm. Add a RTC driver for this function. Signed-off-by: Jacky Bai Reviewed-by: Peng Fan --- - v2 changes: - sort the header file alphabetically - rename the file to add 'nxp' prefix - refine bbnsm_rtc_irq_handler function, remove the unnecessary event variable - add rtc enable check in .read_time, remove rtc enable in probe function - remove unnecessary dev_err log in probe function - v3 changes: - get the regmap directly from parent node - remove unnecessary dev_err log print --- drivers/rtc/Kconfig | 12 ++ drivers/rtc/Makefile | 1 + drivers/rtc/rtc-nxp-bbnsm.c | 226 ++++++++++++++++++++++++++++++++++++ 3 files changed, 239 insertions(+) create mode 100644 drivers/rtc/rtc-nxp-bbnsm.c diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index 677d2601d305..1b9e8395d118 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -1786,6 +1786,18 @@ config RTC_DRV_SNVS This driver can also be built as a module, if so, the module will be called "rtc-snvs". +config RTC_DRV_BBNSM + tristate "NXP BBNSM RTC support" + select REGMAP_MMIO + depends on ARCH_MXC || COMPILE_TEST + depends on HAS_IOMEM + depends on OF + help + If you say yes here you get support for the NXP BBNSM RTC module. + + This driver can also be built as a module, if so, the module + will be called "rtc-bbnsm". + config RTC_DRV_IMX_SC depends on IMX_SCU depends on HAVE_ARM_SMCCC diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index d3c042dcbc73..0f11027a7388 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile @@ -33,6 +33,7 @@ obj-$(CONFIG_RTC_DRV_ASPEED) += rtc-aspeed.o obj-$(CONFIG_RTC_DRV_AT91RM9200)+= rtc-at91rm9200.o obj-$(CONFIG_RTC_DRV_AT91SAM9) += rtc-at91sam9.o obj-$(CONFIG_RTC_DRV_AU1XXX) += rtc-au1xxx.o +obj-$(CONFIG_RTC_DRV_BBNSM) += rtc-nxp-bbnsm.o obj-$(CONFIG_RTC_DRV_BD70528) += rtc-bd70528.o obj-$(CONFIG_RTC_DRV_BQ32K) += rtc-bq32k.o obj-$(CONFIG_RTC_DRV_BQ4802) += rtc-bq4802.o diff --git a/drivers/rtc/rtc-nxp-bbnsm.c b/drivers/rtc/rtc-nxp-bbnsm.c new file mode 100644 index 000000000000..fd7046695d01 --- /dev/null +++ b/drivers/rtc/rtc-nxp-bbnsm.c @@ -0,0 +1,226 @@ +// SPDX-License-Identifier: GPL-2.0+ +// +// Copyright 2022 NXP. + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define BBNSM_CTRL 0x8 +#define BBNSM_INT_EN 0x10 +#define BBNSM_EVENTS 0x14 +#define BBNSM_RTC_LS 0x40 +#define BBNSM_RTC_MS 0x44 +#define BBNSM_TA 0x50 + +#define RTC_EN 0x2 +#define RTC_EN_MSK 0x3 +#define TA_EN (0x2 << 2) +#define TA_DIS (0x1 << 2) +#define TA_EN_MSK (0x3 << 2) +#define RTC_INT_EN 0x2 +#define TA_INT_EN (0x2 << 2) + +#define BBNSM_EVENT_TA (0x2 << 2) + +#define CNTR_TO_SECS_SH 15 + +struct bbnsm_rtc { + struct rtc_device *rtc; + struct regmap *regmap; + int irq; + struct clk *clk; +}; + +static u32 bbnsm_read_counter(struct bbnsm_rtc *bbnsm) +{ + u32 rtc_msb, rtc_lsb; + unsigned int timeout = 100; + u32 time; + u32 tmp = 0; + + do { + time = tmp; + /* read the msb */ + regmap_read(bbnsm->regmap, BBNSM_RTC_MS, &rtc_msb); + /* read the lsb */ + regmap_read(bbnsm->regmap, BBNSM_RTC_LS, &rtc_lsb); + /* convert to seconds */ + tmp = (rtc_msb << 17) | (rtc_lsb >> 15); + } while (tmp != time && --timeout); + + return time; +} + +static int bbnsm_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct bbnsm_rtc *bbnsm = dev_get_drvdata(dev); + unsigned long time; + u32 val; + + regmap_read(bbnsm->regmap, BBNSM_CTRL, &val); + if ((val & RTC_EN_MSK) != RTC_EN) + return -EINVAL; + + time = bbnsm_read_counter(bbnsm); + rtc_time64_to_tm(time, tm); + + return 0; +} + +static int bbnsm_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct bbnsm_rtc *bbnsm = dev_get_drvdata(dev); + unsigned long time = rtc_tm_to_time64(tm); + + /* disable the RTC first */ + regmap_update_bits(bbnsm->regmap, BBNSM_CTRL, RTC_EN_MSK, 0); + + /* write the 32bit sec time to 47 bit timer counter, leaving 15 LSBs blank */ + regmap_write(bbnsm->regmap, BBNSM_RTC_LS, time << CNTR_TO_SECS_SH); + regmap_write(bbnsm->regmap, BBNSM_RTC_MS, time >> (32 - CNTR_TO_SECS_SH)); + + /* Enable the RTC again */ + regmap_update_bits(bbnsm->regmap, BBNSM_CTRL, RTC_EN_MSK, RTC_EN); + + return 0; +} + +static int bbnsm_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct bbnsm_rtc *bbnsm = dev_get_drvdata(dev); + u32 bbnsm_events, bbnsm_ta; + + regmap_read(bbnsm->regmap, BBNSM_TA, &bbnsm_ta); + rtc_time64_to_tm(bbnsm_ta, &alrm->time); + + regmap_read(bbnsm->regmap, BBNSM_EVENTS, &bbnsm_events); + alrm->pending = (bbnsm_events & BBNSM_EVENT_TA) ? 1 : 0; + + return 0; +} + +static int bbnsm_rtc_alarm_irq_enable(struct device *dev, unsigned int enable) +{ + struct bbnsm_rtc *bbnsm = dev_get_drvdata(dev); + + /* enable the alarm event */ + regmap_update_bits(bbnsm->regmap, BBNSM_CTRL, TA_EN_MSK, enable ? TA_EN : TA_DIS); + /* enable the alarm interrupt */ + regmap_update_bits(bbnsm->regmap, BBNSM_INT_EN, TA_EN_MSK, enable ? TA_EN : TA_DIS); + + return 0; +} + +static int bbnsm_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct bbnsm_rtc *bbnsm = dev_get_drvdata(dev); + unsigned long time = rtc_tm_to_time64(&alrm->time); + + /* disable the alarm */ + regmap_update_bits(bbnsm->regmap, BBNSM_CTRL, TA_EN, TA_EN); + + /* write the seconds to TA */ + regmap_write(bbnsm->regmap, BBNSM_TA, time); + + return bbnsm_rtc_alarm_irq_enable(dev, alrm->enabled); +} + +static const struct rtc_class_ops bbnsm_rtc_ops = { + .read_time = bbnsm_rtc_read_time, + .set_time = bbnsm_rtc_set_time, + .read_alarm = bbnsm_rtc_read_alarm, + .set_alarm = bbnsm_rtc_set_alarm, + .alarm_irq_enable = bbnsm_rtc_alarm_irq_enable, +}; + +static irqreturn_t bbnsm_rtc_irq_handler(int irq, void *dev_id) +{ + struct device *dev = dev_id; + struct bbnsm_rtc *bbnsm = dev_get_drvdata(dev); + u32 val; + + regmap_read(bbnsm->regmap, BBNSM_EVENTS, &val); + if (val & BBNSM_EVENT_TA) { + bbnsm_rtc_alarm_irq_enable(dev, false); + /* clear the alarm event */ + regmap_write_bits(bbnsm->regmap, BBNSM_EVENTS, TA_EN_MSK, BBNSM_EVENT_TA); + rtc_update_irq(bbnsm->rtc, 1, RTC_AF | RTC_IRQF); + + return IRQ_HANDLED; + } + + return IRQ_NONE; +} + +static int bbnsm_rtc_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct bbnsm_rtc *bbnsm; + int ret; + + bbnsm = devm_kzalloc(&pdev->dev, sizeof(*bbnsm), GFP_KERNEL); + if (!bbnsm) + return -ENOMEM; + + bbnsm->rtc = devm_rtc_allocate_device(&pdev->dev); + if (IS_ERR(bbnsm->rtc)) + return PTR_ERR(bbnsm->rtc); + + bbnsm->regmap = syscon_node_to_regmap(np->parent); + if (IS_ERR(bbnsm->regmap)) { + dev_dbg(&pdev->dev, "bbnsm get regmap failed\n"); + return PTR_ERR(bbnsm->regmap); + } + + bbnsm->irq = platform_get_irq(pdev, 0); + if (bbnsm->irq < 0) + return bbnsm->irq; + + platform_set_drvdata(pdev, bbnsm); + + /* clear all the pending events */ + regmap_write(bbnsm->regmap, BBNSM_EVENTS, 0x7A); + + device_init_wakeup(&pdev->dev, true); + dev_pm_set_wake_irq(&pdev->dev, bbnsm->irq); + + ret = devm_request_irq(&pdev->dev, bbnsm->irq, bbnsm_rtc_irq_handler, + IRQF_SHARED, "rtc alarm", &pdev->dev); + if (ret) { + dev_err(&pdev->dev, "failed to request irq %d: %d\n", + bbnsm->irq, ret); + return ret; + } + + bbnsm->rtc->ops = &bbnsm_rtc_ops; + bbnsm->rtc->range_max = U32_MAX; + + return devm_rtc_register_device(bbnsm->rtc); +} + +static const struct of_device_id bbnsm_dt_ids[] = { + { .compatible = "nxp,bbnsm-rtc", }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, bbnsm_dt_ids); + +static struct platform_driver bbnsm_rtc_driver = { + .driver = { + .name = "bbnsm_rtc", + .of_match_table = bbnsm_dt_ids, + }, + .probe = bbnsm_rtc_probe, +}; +module_platform_driver(bbnsm_rtc_driver); + +MODULE_AUTHOR("Jacky Bai "); +MODULE_DESCRIPTION("NXP BBNSM RTC Driver"); +MODULE_LICENSE("GPL");