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[60.250.192.107]) by smtp.gmail.com with ESMTPSA id gg10-20020a17090b0a0a00b001ef917f1c30sm1051975pjb.6.2022.07.13.02.06.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 13 Jul 2022 02:06:59 -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, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, ctcchien@nuvoton.com, medadyoung@gmail.com, mimi05633@gmail.com, KWLIU@nuvoton.com, YSCHU@nuvoton.com, KFTING@nuvoton.com, JJLIU0@nuvoton.com, mylin1@nuvoton.com Cc: openbmc@lists.ozlabs.org, linux-rtc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v6 1/3] dt-bindings: rtc: nuvoton: add NCT3018Y Real Time Clock Date: Wed, 13 Jul 2022 17:06:45 +0800 Message-Id: <20220713090647.8028-2-mimi05633@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220713090647.8028-1-mimi05633@gmail.com> References: <20220713090647.8028-1-mimi05633@gmail.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Document devicetree bindings for the Nuvoton NCT3018Y Real Time Clock. Reviewed-by: Rob Herring Signed-off-by: Mia Lin --- .../bindings/rtc/nuvoton,nct3018y.yaml | 45 +++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 46 insertions(+) create mode 100644 Documentation/devicetree/bindings/rtc/nuvoton,nct3018y.= yaml diff --git a/Documentation/devicetree/bindings/rtc/nuvoton,nct3018y.yaml b/= Documentation/devicetree/bindings/rtc/nuvoton,nct3018y.yaml new file mode 100644 index 000000000000..7a1857f5caa8 --- /dev/null +++ b/Documentation/devicetree/bindings/rtc/nuvoton,nct3018y.yaml @@ -0,0 +1,45 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/rtc/nuvoton,nct3018y.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: NUVOTON NCT3018Y Real Time Clock + +allOf: + - $ref: "rtc.yaml#" + +maintainers: + - Medad CChien + - Mia Lin + +properties: + compatible: + const: nuvoton,nct3018y + + reg: + maxItems: 1 + + start-year: true + + reset-source: true + +required: + - compatible + - reg + +additionalProperties: false + +examples: + - | + i2c { + #address-cells =3D <1>; + #size-cells =3D <0>; + + rtc@6f { + compatible =3D "nuvoton,nct3018y"; + reg =3D <0x6f>; + }; + }; + +... diff --git a/MAINTAINERS b/MAINTAINERS index fe5daf141501..eca54b275559 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2448,6 +2448,7 @@ S: Supported F: Documentation/devicetree/bindings/*/*/*npcm* F: Documentation/devicetree/bindings/*/*npcm* F: Documentation/devicetree/bindings/arm/npcm/* +F: Documentation/devicetree/bindings/rtc/nuvoton,nct3018y.yaml F: arch/arm/boot/dts/nuvoton-npcm* F: arch/arm/mach-npcm/ F: drivers/*/*npcm* --=20 2.17.1 From nobody Sat Apr 18 14:11:33 2026 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 3AA0EC433EF for ; Wed, 13 Jul 2022 09:07:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235263AbiGMJHK (ORCPT ); Wed, 13 Jul 2022 05:07:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51556 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235303AbiGMJHG (ORCPT ); Wed, 13 Jul 2022 05:07:06 -0400 Received: from mail-pj1-x102a.google.com (mail-pj1-x102a.google.com [IPv6:2607:f8b0:4864:20::102a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7BD0EEA160; Wed, 13 Jul 2022 02:07:05 -0700 (PDT) Received: by mail-pj1-x102a.google.com with SMTP id i8-20020a17090a4b8800b001ef8a65bfbdso2555569pjh.1; Wed, 13 Jul 2022 02:07:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=4V5vh8DXeM0COdtFgoDP2qDwOY6Wrz0D8EvRqSBB7X8=; b=SNGEFGGcQLJsDZ7sHgtHXmK7NehDk55BHCztWTNOq8nGsxZYeLEd1+gwfOOr1RW7wf o0ctWHOHg/I/Je69BYhpj5qoxeVpy7A7SWsbGvGM7yy3gGULUxRCwObwKpIaurShpN7w tSuUu1Rsupd8sY9LPbYj7OytcN9+6X4/x4Hd8g7s913kmT9/NQn/UAQkGYnaQ3K9liVX fNp/FN/3cVk4j9N3nPx+Lo+ALAsx1u7a4PcybM/K4pb9QBP/a0dVVTSlmNuwER2jU0hm 974/dVydRJ5WiSImF3nmLBzm8vtge1nUoCtTsYTaf0Cc5QBKfBUBkrRxqWSe5D3xPtr2 i1Cg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=4V5vh8DXeM0COdtFgoDP2qDwOY6Wrz0D8EvRqSBB7X8=; b=JyhptwTCbKsH8PI/zsRvY30Oala2LuD30Sf4LFq54/XnQxGRzrszHHzyifkK4r9gYj MbUVraBPT9OHdvCte5QvJ1RHF2RncNy/+Kg87GMkkRiml8JibX4MITe7j6fi8alCPU6l hn5sZ+AugNodA1qnNdSurNUJlMTLuVFRUTH+dJHPmNnvNqUM6BAqXvfSmpcxGDZuYJms b68uud8dJNMz7VUUq8Ey0SRnnfu5xMlgMyowgqpJyXYtpYCk1cRZo7J+l8MoVBKdDm8S 5A4RT2mP9N81Lgv2FJzAfpaDZ2c1kljtui9wj6fIPb3vzosmZGPk4fXRhV/kZVheU/zn 5iGA== X-Gm-Message-State: AJIora9vYdx5/QtgBcoEVHMXzjZqkIpNpiT2ityVsD7UpVeSNU+oSoWK U/HKkxVWy0oFFVUALkOyWtg= X-Google-Smtp-Source: AGRyM1vTiNDy6PQzA0eiQxZP9EmoR2z6AwboFWsD0r4yqcmTYeyR50aauJEXi1HK3ZfXdEWgWk6zyA== X-Received: by 2002:a17:902:ecca:b0:16b:d519:d1df with SMTP id a10-20020a170902ecca00b0016bd519d1dfmr2144404plh.170.1657703224668; Wed, 13 Jul 2022 02:07:04 -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 gg10-20020a17090b0a0a00b001ef917f1c30sm1051975pjb.6.2022.07.13.02.07.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 13 Jul 2022 02:07:04 -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, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, ctcchien@nuvoton.com, medadyoung@gmail.com, mimi05633@gmail.com, KWLIU@nuvoton.com, YSCHU@nuvoton.com, KFTING@nuvoton.com, JJLIU0@nuvoton.com, mylin1@nuvoton.com Cc: openbmc@lists.ozlabs.org, linux-rtc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v6 2/3] ARM: dts: nuvoton: Add nuvoton RTC3018Y node Date: Wed, 13 Jul 2022 17:06:46 +0800 Message-Id: <20220713090647.8028-3-mimi05633@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220713090647.8028-1-mimi05633@gmail.com> References: <20220713090647.8028-1-mimi05633@gmail.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Add nuvoton real time clock RTC3018Y in I2C node Signed-off-by: Mia Lin --- arch/arm/boot/dts/nuvoton-npcm750-evb.dts | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/arm/boot/dts/nuvoton-npcm750-evb.dts b/arch/arm/boot/dts/= nuvoton-npcm750-evb.dts index 3dad32834e5e..2b0597d7b109 100644 --- a/arch/arm/boot/dts/nuvoton-npcm750-evb.dts +++ b/arch/arm/boot/dts/nuvoton-npcm750-evb.dts @@ -202,6 +202,11 @@ reg =3D <0x48>; status =3D "okay"; }; + + rtc0: rtc@6f { + compatible =3D "nuvoton,nct3018y"; + reg =3D <0x6f>; + }; }; =20 /* lm75 on EB */ --=20 2.17.1 From nobody Sat Apr 18 14:11:33 2026 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 43543C433EF for ; Wed, 13 Jul 2022 09:07:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236058AbiGMJHQ (ORCPT ); Wed, 13 Jul 2022 05:07:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51724 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236026AbiGMJHK (ORCPT ); Wed, 13 Jul 2022 05:07:10 -0400 Received: from mail-pf1-x434.google.com (mail-pf1-x434.google.com [IPv6:2607:f8b0:4864:20::434]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 54681EA179; Wed, 13 Jul 2022 02:07:09 -0700 (PDT) Received: by mail-pf1-x434.google.com with SMTP id e16so9683886pfm.11; Wed, 13 Jul 2022 02:07:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=SS0KWdE23VEiWHOtz+dQmVEyRW9ZPdQxx7y08COy3XM=; b=Achms/jydlTbldiEmQDk+ElK9ZvBN3k8HeKVofJ8BUNyEnxoKl6SKzfkfJFHu4Fnbl FWYCtmAWoGC7hDnDV8OrUQdOAgtdD3rWvwEBTG9x7/G/qdTMzqB1AYW7oUGquQF5m+tg 1hsiBhwqcT1MhCKQ+TKp+W1WWt81VJXxT7k/LoTomOaUzF1SsQR2u8eWwcCmuftJnciv O4/1M/VoqaNcFm3PMFSedIHhI0pszOuxUYwt+XxT4cr/AiqYYBubUtg01xrTUTfvhgif hxCoknyHlDEvU9Lcd5wHziC5h7p0TaS1NPriFKNAztLwsedpr04Bvykr0+0F8U0X/toS ei1w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=SS0KWdE23VEiWHOtz+dQmVEyRW9ZPdQxx7y08COy3XM=; b=tHNyVcMJY1dq1TH1+YwhajxeyZ/ExB844Er2IMmOdQQMyDNDe/owR+St7iRRKx0V9R RjupAlIGbJ5QOEyMwUrwhlB8Yw3w406FtAMyZ/5/sWXRz3dZVfeH4//kweXG7/6f0Nqw xhUXA8OHyrqFvESz9GxMzF6fCrHCLhVVfqyhrhzZCp9v98gwJyimj5inX8WcSsv01ls/ XkdzCwF+pes64VlJjDSlTaK7vcCbtI4mTmmpH+0ASu17eY2CPJxp9QkVWMv2rWkfL6Dv fs8tFtR4eqdTyUVQAT6G3affoZZSv0a/MyvXCpD5iQhUu1O+MW8t12GcD2HNpVU/zniM WMDA== X-Gm-Message-State: AJIora+R1d5YYeVuKVbOzBCrxlHsQ/C2llujBl2qg9H+d4kA1e3aZB8p NdLJdGfxEJPG8G9mZzNJ/VM= X-Google-Smtp-Source: AGRyM1sXjUR3JL8KfbWyOmjwTKDslApBcNQAahVkZwnexxt+apXjvr64ENQEGJp+RdgRPQkJOtbRwA== X-Received: by 2002:a05:6a00:2448:b0:528:7acc:363 with SMTP id d8-20020a056a00244800b005287acc0363mr2314641pfj.32.1657703228650; Wed, 13 Jul 2022 02:07:08 -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 gg10-20020a17090b0a0a00b001ef917f1c30sm1051975pjb.6.2022.07.13.02.07.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 13 Jul 2022 02:07:08 -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, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, ctcchien@nuvoton.com, medadyoung@gmail.com, mimi05633@gmail.com, KWLIU@nuvoton.com, YSCHU@nuvoton.com, KFTING@nuvoton.com, JJLIU0@nuvoton.com, mylin1@nuvoton.com Cc: openbmc@lists.ozlabs.org, linux-rtc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v6 3/3] RTC: nuvoton: Add NCT3018Y real time clock driver Date: Wed, 13 Jul 2022 17:06:47 +0800 Message-Id: <20220713090647.8028-4-mimi05633@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220713090647.8028-1-mimi05633@gmail.com> References: <20220713090647.8028-1-mimi05633@gmail.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Add real time clock support for NCT3018Y. Signed-off-by: Mia Lin --- MAINTAINERS | 1 + drivers/rtc/Kconfig | 10 + drivers/rtc/Makefile | 1 + drivers/rtc/rtc-nct3018y.c | 553 +++++++++++++++++++++++++++++++++++++ 4 files changed, 565 insertions(+) create mode 100644 drivers/rtc/rtc-nct3018y.c diff --git a/MAINTAINERS b/MAINTAINERS index eca54b275559..08101c49cba6 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2453,6 +2453,7 @@ F: arch/arm/boot/dts/nuvoton-npcm* F: arch/arm/mach-npcm/ F: drivers/*/*npcm* F: drivers/*/*/*npcm* +F: drivers/rtc/rtc-nct3018y.c F: include/dt-bindings/clock/nuvoton,npcm7xx-clock.h =20 ARM/NUVOTON WPCM450 ARCHITECTURE diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index a00f901b5c1d..3444c638fd28 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -383,6 +383,16 @@ config RTC_DRV_MAX77686 This driver can also be built as a module. If so, the module will be called rtc-max77686. =20 +config RTC_DRV_NCT3018Y + tristate "Nuvoton NCT3018Y" + depends on OF + help + If you say yes here you get support for the Nuvoton NCT3018Y I2C RTC + chip. + + This driver can also be built as a module, if so, the module will be + called "rtc-nct3018y". + config RTC_DRV_RK808 tristate "Rockchip RK805/RK808/RK809/RK817/RK818 RTC" depends on MFD_RK808 diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index fb04467b652d..12353df426ff 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile @@ -112,6 +112,7 @@ obj-$(CONFIG_RTC_DRV_MV) +=3D rtc-mv.o obj-$(CONFIG_RTC_DRV_MXC) +=3D rtc-mxc.o obj-$(CONFIG_RTC_DRV_MXC_V2) +=3D rtc-mxc_v2.o obj-$(CONFIG_RTC_DRV_GAMECUBE) +=3D rtc-gamecube.o +obj-$(CONFIG_RTC_DRV_NCT3018Y) +=3D rtc-nct3018y.o obj-$(CONFIG_RTC_DRV_NTXEC) +=3D rtc-ntxec.o obj-$(CONFIG_RTC_DRV_OMAP) +=3D rtc-omap.o obj-$(CONFIG_RTC_DRV_OPAL) +=3D rtc-opal.o diff --git a/drivers/rtc/rtc-nct3018y.c b/drivers/rtc/rtc-nct3018y.c new file mode 100644 index 000000000000..d43acd3920ed --- /dev/null +++ b/drivers/rtc/rtc-nct3018y.c @@ -0,0 +1,553 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2022 Nuvoton Technology Corporation + +#include +#include +#include +#include +#include +#include +#include +#include + +#define NCT3018Y_REG_SC 0x00 /* seconds */ +#define NCT3018Y_REG_SCA 0x01 /* alarm */ +#define NCT3018Y_REG_MN 0x02 +#define NCT3018Y_REG_MNA 0x03 /* alarm */ +#define NCT3018Y_REG_HR 0x04 +#define NCT3018Y_REG_HRA 0x05 /* alarm */ +#define NCT3018Y_REG_DW 0x06 +#define NCT3018Y_REG_DM 0x07 +#define NCT3018Y_REG_MO 0x08 +#define NCT3018Y_REG_YR 0x09 +#define NCT3018Y_REG_CTRL 0x0A /* timer control */ +#define NCT3018Y_REG_ST 0x0B /* status */ +#define NCT3018Y_REG_CLKO 0x0C /* clock out */ + +#define NCT3018Y_BIT_AF BIT(7) +#define NCT3018Y_BIT_ST BIT(7) +#define NCT3018Y_BIT_DM BIT(6) +#define NCT3018Y_BIT_HF BIT(5) +#define NCT3018Y_BIT_DSM BIT(4) +#define NCT3018Y_BIT_AIE BIT(3) +#define NCT3018Y_BIT_OFIE BIT(2) +#define NCT3018Y_BIT_CIE BIT(1) +#define NCT3018Y_BIT_TWO BIT(0) + +#define NCT3018Y_REG_BAT_MASK 0x07 +#define NCT3018Y_REG_CLKO_F_MASK 0x03 /* frequenc mask */ +#define NCT3018Y_REG_CLKO_CKE 0x80 /* clock out enabled */ + +struct nct3018y { + struct rtc_device *rtc; + struct i2c_client *client; +#ifdef CONFIG_COMMON_CLK + struct clk_hw clkout_hw; +#endif +}; + +static int nct3018y_set_alarm_mode(struct i2c_client *client, bool on) +{ + int err, flags; + + dev_dbg(&client->dev, "%s:on:%d\n", __func__, on); + + flags =3D i2c_smbus_read_byte_data(client, NCT3018Y_REG_CTRL); + if (flags < 0) { + dev_dbg(&client->dev, + "Failed to read NCT3018Y_REG_CTRL\n"); + return flags; + } + + if (on) + flags |=3D NCT3018Y_BIT_AIE; + else + flags &=3D ~NCT3018Y_BIT_AIE; + + flags |=3D NCT3018Y_BIT_CIE; + err =3D 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; + } + + flags =3D i2c_smbus_read_byte_data(client, NCT3018Y_REG_ST); + if (flags < 0) { + dev_dbg(&client->dev, + "Failed to read NCT3018Y_REG_ST\n"); + return flags; + } + + flags &=3D ~(NCT3018Y_BIT_AF); + err =3D i2c_smbus_write_byte_data(client, NCT3018Y_REG_ST, flags); + if (err < 0) { + dev_dbg(&client->dev, "Unable to write NCT3018Y_REG_ST\n"); + return err; + } + + return 0; +} + +static int nct3018y_get_alarm_mode(struct i2c_client *client, unsigned cha= r *alarm_enable, + unsigned char *alarm_flag) +{ + int flags; + + if (alarm_enable) { + dev_dbg(&client->dev, "%s:NCT3018Y_REG_CTRL\n", __func__); + flags =3D i2c_smbus_read_byte_data(client, NCT3018Y_REG_CTRL); + if (flags < 0) + return flags; + *alarm_enable =3D flags & NCT3018Y_BIT_AIE; + } + + if (alarm_flag) { + dev_dbg(&client->dev, "%s:NCT3018Y_REG_ST\n", __func__); + flags =3D i2c_smbus_read_byte_data(client, NCT3018Y_REG_ST); + if (flags < 0) + return flags; + *alarm_flag =3D flags & NCT3018Y_BIT_AF; + } + + dev_dbg(&client->dev, "%s:alarm_enable:%x alarm_flag:%x\n", + __func__, *alarm_enable, *alarm_flag); + + return 0; +} + +static irqreturn_t nct3018y_irq(int irq, void *dev_id) +{ + struct nct3018y *nct3018y =3D i2c_get_clientdata(dev_id); + struct i2c_client *client =3D nct3018y->client; + int err; + unsigned char alarm_flag; + unsigned char alarm_enable; + + dev_dbg(&client->dev, "%s:irq:%d\n", __func__, irq); + err =3D nct3018y_get_alarm_mode(nct3018y->client, &alarm_enable, &alarm_f= lag); + if (err) + return IRQ_NONE; + + if (alarm_flag) { + dev_dbg(&client->dev, "%s:alarm flag:%x\n", + __func__, alarm_flag); + rtc_update_irq(nct3018y->rtc, 1, RTC_IRQF | RTC_AF); + nct3018y_set_alarm_mode(nct3018y->client, 0); + dev_dbg(&client->dev, "%s:IRQ_HANDLED\n", __func__); + return IRQ_HANDLED; + } + + return IRQ_NONE; +} + +/* + * In the routines that deal directly with the nct3018y hardware, we use + * rtc_time -- month 0-11, hour 0-23, yr =3D calendar year-epoch. + */ +static int nct3018y_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct i2c_client *client =3D to_i2c_client(dev); + unsigned char buf[10]; + int err; + + err =3D i2c_smbus_read_i2c_block_data(client, NCT3018Y_REG_ST, 1, buf); + if (err < 0) + return err; + + if (!buf[0]) { + dev_dbg(&client->dev, " voltage <=3D1.7, date/time is not reliable.\n"); + return -EINVAL; + } + + err =3D i2c_smbus_read_i2c_block_data(client, NCT3018Y_REG_SC, sizeof(buf= ), buf); + if (err < 0) + return err; + + tm->tm_sec =3D bcd2bin(buf[0] & 0x7F); + tm->tm_min =3D bcd2bin(buf[2] & 0x7F); + tm->tm_hour =3D bcd2bin(buf[4] & 0x3F); + tm->tm_wday =3D buf[6] & 0x07; + tm->tm_mday =3D bcd2bin(buf[7] & 0x3F); + tm->tm_mon =3D bcd2bin(buf[8] & 0x1F) - 1; + tm->tm_year =3D bcd2bin(buf[9]) + 100; + + return 0; +} + +static int nct3018y_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct i2c_client *client =3D to_i2c_client(dev); + unsigned char buf[4] =3D {0}; + int err; + + buf[0] =3D bin2bcd(tm->tm_sec); + err =3D 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"); + return err; + } + + buf[0] =3D bin2bcd(tm->tm_min); + err =3D 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"); + return err; + } + + buf[0] =3D bin2bcd(tm->tm_hour); + err =3D 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"); + return err; + } + + buf[0] =3D tm->tm_wday & 0x07; + buf[1] =3D bin2bcd(tm->tm_mday); + buf[2] =3D bin2bcd(tm->tm_mon + 1); + buf[3] =3D bin2bcd(tm->tm_year - 100); + err =3D 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"); + return -EIO; + } + + return err; +} + +static int nct3018y_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *= tm) +{ + struct i2c_client *client =3D to_i2c_client(dev); + unsigned char buf[5]; + int err; + + err =3D 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"); + return -EIO; + } + + dev_dbg(&client->dev, "%s: raw data is sec=3D%02x, min=3D%02x hr=3D%02x\n= ", + __func__, buf[0], buf[2], buf[4]); + + tm->time.tm_sec =3D bcd2bin(buf[0] & 0x7F); + tm->time.tm_min =3D bcd2bin(buf[2] & 0x7F); + tm->time.tm_hour =3D bcd2bin(buf[4] & 0x3F); + + err =3D nct3018y_get_alarm_mode(client, &tm->enabled, &tm->pending); + if (err < 0) + return err; + + dev_dbg(&client->dev, "%s:s=3D%d m=3D%d, hr=3D%d, enabled=3D%d, pending= =3D%d\n", + __func__, tm->time.tm_sec, tm->time.tm_min, + tm->time.tm_hour, tm->enabled, tm->pending); + + return 0; +} + +static int nct3018y_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *t= m) +{ + struct i2c_client *client =3D to_i2c_client(dev); + int err; + + dev_dbg(dev, "%s, sec=3D%d, min=3D%d hour=3D%d tm->enabled:%d\n", + __func__, tm->time.tm_sec, tm->time.tm_min, tm->time.tm_hour, + tm->enabled); + + err =3D i2c_smbus_write_byte_data(client, NCT3018Y_REG_SCA, bin2bcd(tm->t= ime.tm_sec)); + if (err < 0) { + dev_dbg(&client->dev, "Unable to write NCT3018Y_REG_SCA\n"); + return err; + } + + err =3D i2c_smbus_write_byte_data(client, NCT3018Y_REG_MNA, bin2bcd(tm->t= ime.tm_min)); + if (err < 0) { + dev_dbg(&client->dev, "Unable to write NCT3018Y_REG_MNA\n"); + return err; + } + + err =3D i2c_smbus_write_byte_data(client, NCT3018Y_REG_HRA, bin2bcd(tm->t= ime.tm_hour)); + if (err < 0) { + dev_dbg(&client->dev, "Unable to write NCT3018Y_REG_HRA\n"); + return err; + } + + return nct3018y_set_alarm_mode(client, tm->enabled); +} + +static int nct3018y_irq_enable(struct device *dev, unsigned int enabled) +{ + dev_dbg(dev, "%s: alarm enable=3D%d\n", __func__, enabled); + + return nct3018y_set_alarm_mode(to_i2c_client(dev), enabled); +} + +static int nct3018y_ioctl(struct device *dev, unsigned int cmd, unsigned l= ong arg) +{ + struct i2c_client *client =3D to_i2c_client(dev); + int status, flags =3D 0; + + switch (cmd) { + case RTC_VL_READ: + status =3D i2c_smbus_read_byte_data(client, NCT3018Y_REG_ST); + if (status < 0) + return status; + + if (!(status & NCT3018Y_REG_BAT_MASK)) + flags |=3D RTC_VL_DATA_INVALID; + + return put_user(flags, (unsigned int __user *)arg); + + default: + return -ENOIOCTLCMD; + } +} + +#ifdef CONFIG_COMMON_CLK +/* + * Handling of the clkout + */ + +#define clkout_hw_to_nct3018y(_hw) container_of(_hw, struct nct3018y, clko= ut_hw) + +static const int clkout_rates[] =3D { + 32768, + 1024, + 32, + 1, +}; + +static unsigned long nct3018y_clkout_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct nct3018y *nct3018y =3D clkout_hw_to_nct3018y(hw); + struct i2c_client *client =3D nct3018y->client; + int flags; + + flags =3D i2c_smbus_read_byte_data(client, NCT3018Y_REG_CLKO); + if (flags < 0) + return 0; + + flags &=3D NCT3018Y_REG_CLKO_F_MASK; + return clkout_rates[flags]; +} + +static long nct3018y_clkout_round_rate(struct clk_hw *hw, unsigned long ra= te, + unsigned long *prate) +{ + int i; + + for (i =3D 0; i < ARRAY_SIZE(clkout_rates); i++) + if (clkout_rates[i] <=3D rate) + return clkout_rates[i]; + + return 0; +} + +static int nct3018y_clkout_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct nct3018y *nct3018y =3D clkout_hw_to_nct3018y(hw); + struct i2c_client *client =3D nct3018y->client; + int i, flags; + + flags =3D i2c_smbus_read_byte_data(client, NCT3018Y_REG_CLKO); + if (flags < 0) + return flags; + + for (i =3D 0; i < ARRAY_SIZE(clkout_rates); i++) + if (clkout_rates[i] =3D=3D rate) { + flags &=3D ~NCT3018Y_REG_CLKO_F_MASK; + flags |=3D i; + return i2c_smbus_write_byte_data(client, NCT3018Y_REG_CLKO, flags); + } + + return -EINVAL; +} + +static int nct3018y_clkout_control(struct clk_hw *hw, bool enable) +{ + struct nct3018y *nct3018y =3D clkout_hw_to_nct3018y(hw); + struct i2c_client *client =3D nct3018y->client; + int flags; + + flags =3D i2c_smbus_read_byte_data(client, NCT3018Y_REG_CLKO); + if (flags < 0) + return flags; + + if (enable) + flags |=3D NCT3018Y_REG_CLKO_CKE; + else + flags &=3D ~NCT3018Y_REG_CLKO_CKE; + + return i2c_smbus_write_byte_data(client, NCT3018Y_REG_CLKO, flags); +} + +static int nct3018y_clkout_prepare(struct clk_hw *hw) +{ + return nct3018y_clkout_control(hw, 1); +} + +static void nct3018y_clkout_unprepare(struct clk_hw *hw) +{ + nct3018y_clkout_control(hw, 0); +} + +static int nct3018y_clkout_is_prepared(struct clk_hw *hw) +{ + struct nct3018y *nct3018y =3D clkout_hw_to_nct3018y(hw); + struct i2c_client *client =3D nct3018y->client; + int flags; + + flags =3D i2c_smbus_read_byte_data(client, NCT3018Y_REG_CLKO); + if (flags < 0) + return flags; + + return flags & NCT3018Y_REG_CLKO_CKE; +} + +static const struct clk_ops nct3018y_clkout_ops =3D { + .prepare =3D nct3018y_clkout_prepare, + .unprepare =3D nct3018y_clkout_unprepare, + .is_prepared =3D nct3018y_clkout_is_prepared, + .recalc_rate =3D nct3018y_clkout_recalc_rate, + .round_rate =3D nct3018y_clkout_round_rate, + .set_rate =3D nct3018y_clkout_set_rate, +}; + +static struct clk *nct3018y_clkout_register_clk(struct nct3018y *nct3018y) +{ + struct i2c_client *client =3D nct3018y->client; + struct device_node *node =3D client->dev.of_node; + struct clk *clk; + struct clk_init_data init; + + init.name =3D "nct3018y-clkout"; + init.ops =3D &nct3018y_clkout_ops; + init.flags =3D 0; + init.parent_names =3D NULL; + init.num_parents =3D 0; + nct3018y->clkout_hw.init =3D &init; + + /* optional override of the clockname */ + of_property_read_string(node, "clock-output-names", &init.name); + + /* register the clock */ + clk =3D devm_clk_register(&client->dev, &nct3018y->clkout_hw); + + if (!IS_ERR(clk)) + of_clk_add_provider(node, of_clk_src_simple_get, clk); + + return clk; +} +#endif + +static const struct rtc_class_ops nct3018y_rtc_ops =3D { + .read_time =3D nct3018y_rtc_read_time, + .set_time =3D nct3018y_rtc_set_time, + .read_alarm =3D nct3018y_rtc_read_alarm, + .set_alarm =3D nct3018y_rtc_set_alarm, + .alarm_irq_enable =3D nct3018y_irq_enable, + .ioctl =3D nct3018y_ioctl, +}; + +static int nct3018y_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct nct3018y *nct3018y; + int err, flags; + + if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C | + I2C_FUNC_SMBUS_BYTE | + I2C_FUNC_SMBUS_BLOCK_DATA)) + return -ENODEV; + + nct3018y =3D devm_kzalloc(&client->dev, sizeof(struct nct3018y), + GFP_KERNEL); + if (!nct3018y) + return -ENOMEM; + + i2c_set_clientdata(client, nct3018y); + nct3018y->client =3D client; + device_set_wakeup_capable(&client->dev, 1); + + flags =3D i2c_smbus_read_byte_data(client, NCT3018Y_REG_CTRL); + if (flags < 0) { + dev_dbg(&client->dev, "%s: read error\n", __func__); + return flags; + } else if (flags & NCT3018Y_BIT_TWO) { + dev_dbg(&client->dev, "%s: NCT3018Y_BIT_TWO is set\n", __func__); + } + + flags =3D NCT3018Y_BIT_TWO; + err =3D 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; + } + + flags =3D 0; + err =3D i2c_smbus_write_byte_data(client, NCT3018Y_REG_ST, flags); + if (err < 0) { + dev_dbg(&client->dev, "%s: write error\n", __func__); + return err; + } + + nct3018y->rtc =3D devm_rtc_allocate_device(&client->dev); + if (IS_ERR(nct3018y->rtc)) + return PTR_ERR(nct3018y->rtc); + + nct3018y->rtc->ops =3D &nct3018y_rtc_ops; + nct3018y->rtc->range_min =3D RTC_TIMESTAMP_BEGIN_2000; + nct3018y->rtc->range_max =3D RTC_TIMESTAMP_END_2099; + + if (client->irq > 0) { + err =3D devm_request_threaded_irq(&client->dev, client->irq, + NULL, nct3018y_irq, + IRQF_ONESHOT | IRQF_TRIGGER_FALLING, + "nct3018y", client); + if (err) { + dev_dbg(&client->dev, "unable to request IRQ %d\n", client->irq); + return err; + } + } else { + clear_bit(RTC_FEATURE_UPDATE_INTERRUPT, nct3018y->rtc->features); + clear_bit(RTC_FEATURE_ALARM, nct3018y->rtc->features); + } + +#ifdef CONFIG_COMMON_CLK + /* register clk in common clk framework */ + nct3018y_clkout_register_clk(nct3018y); +#endif + + return devm_rtc_register_device(nct3018y->rtc); +} + +static const struct i2c_device_id nct3018y_id[] =3D { + { "nct3018y", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, nct3018y_id); + +static const struct of_device_id nct3018y_of_match[] =3D { + { .compatible =3D "nuvoton,nct3018y" }, + {} +}; +MODULE_DEVICE_TABLE(of, nct3018y_of_match); + +static struct i2c_driver nct3018y_driver =3D { + .driver =3D { + .name =3D "rtc-nct3018y", + .of_match_table =3D of_match_ptr(nct3018y_of_match), + }, + .probe =3D nct3018y_probe, + .id_table =3D nct3018y_id, +}; + +module_i2c_driver(nct3018y_driver); + +MODULE_AUTHOR("Medad CChien "); +MODULE_AUTHOR("Mia Lin "); +MODULE_DESCRIPTION("Nuvoton NCT3018Y RTC driver"); +MODULE_LICENSE("GPL"); --=20 2.17.1