From patchwork Sun Aug 20 01:36:30 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Andreas_F=C3=A4rber?= X-Patchwork-Id: 9910755 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id BCEFE600C8 for ; Sun, 20 Aug 2017 01:39:46 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A3A9B2887B for ; Sun, 20 Aug 2017 01:39:46 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 97F052889D; Sun, 20 Aug 2017 01:39:46 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.6 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,RCVD_IN_DNSWL_LOW autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id EFF9B2887B for ; Sun, 20 Aug 2017 01:39:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=NrlM0IPQTubF9YdtNHKxmEIj0TK4nDq928joTcSJ/Mo=; b=RJ/sE+iWPKCu7N K+oWGm0q1lgv2NMm6uRBasFI0uufqtOPP6BR5ZMvf5dmGJOSXfcAA7I+83z2lXA9oj/kSd1hY/p4I iKswETD+KZjxLH1RRDm9w8xUlAZWYXVhcrjhcPROgUbxekFEwcQhxIEzpgmQxByQKRd7Mush2IiZy 9u1fDHOmTb7c29XQtyEvHeVzfNgn+L5trh/xh6mAZ4vZfMNYtHjYTqbMz1Mbf1Ev744SHEoKMnG2I A+Q1kamJ5Vpi8T26Yr2JVpOYrIAly4vdULt386REGIr5ZcPv4nur860CagMTWFG6dtN7UtIUbKpn+ 7PtDdhU1YYDroINIYpJg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1djFDI-0002az-TN; Sun, 20 Aug 2017 01:39:40 +0000 Received: from mx2.suse.de ([195.135.220.15] helo=mx1.suse.de) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1djFBc-0000xH-Oz for linux-arm-kernel@lists.infradead.org; Sun, 20 Aug 2017 01:38:00 +0000 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay1.suse.de (charybdis-ext.suse.de [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 0684FABED; Sun, 20 Aug 2017 01:37:31 +0000 (UTC) From: =?UTF-8?q?Andreas=20F=C3=A4rber?= To: Alessandro Zummo , Alexandre Belloni , linux-rtc@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [RFC 2/3] rtc: Add Realtek RTD1295 Date: Sun, 20 Aug 2017 03:36:30 +0200 Message-Id: <20170820013632.18375-3-afaerber@suse.de> X-Mailer: git-send-email 2.12.3 In-Reply-To: <20170820013632.18375-1-afaerber@suse.de> References: <20170820013632.18375-1-afaerber@suse.de> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170819_183757_207234_75AF93EB X-CRM114-Status: GOOD ( 17.37 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?UTF-8?q?=E8=92=8B=E4=B8=BD=E7=90=B4?= , linux-kernel@vger.kernel.org, =?UTF-8?q?Andreas=20F=C3=A4rber?= , Roc He Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Based on QNAP's mach-rtk119x/driver/rtk_rtc_drv.c code. Signed-off-by: Andreas Färber --- drivers/rtc/Kconfig | 8 +++ drivers/rtc/Makefile | 1 + drivers/rtc/rtc-rtd119x.c | 175 ++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 184 insertions(+) create mode 100644 drivers/rtc/rtc-rtd119x.c diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index 72419ac2c52a..882828b1b351 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -1765,6 +1765,14 @@ config RTC_DRV_CPCAP Say y here for CPCAP rtc found on some Motorola phones and tablets such as Droid 4. +config RTC_DRV_RTD119X + bool "Realtek RTD129x RTC" + depends on ARCH_REALTEK || COMPILE_TEST + default ARCH_REALTEK + help + If you say yes here, you get support for the RTD1295 SoC + Real Time Clock. + comment "HID Sensor RTC drivers" config RTC_DRV_HID_SENSOR_TIME diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index acd366b41c85..55a0a5ca45b0 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile @@ -131,6 +131,7 @@ obj-$(CONFIG_RTC_DRV_RP5C01) += rtc-rp5c01.o obj-$(CONFIG_RTC_DRV_RS5C313) += rtc-rs5c313.o obj-$(CONFIG_RTC_DRV_RS5C348) += rtc-rs5c348.o obj-$(CONFIG_RTC_DRV_RS5C372) += rtc-rs5c372.o +obj-$(CONFIG_RTC_DRV_RTD119X) += rtc-rtd119x.o obj-$(CONFIG_RTC_DRV_RV3029C2) += rtc-rv3029c2.o obj-$(CONFIG_RTC_DRV_RV8803) += rtc-rv8803.o obj-$(CONFIG_RTC_DRV_RX4581) += rtc-rx4581.o diff --git a/drivers/rtc/rtc-rtd119x.c b/drivers/rtc/rtc-rtd119x.c new file mode 100644 index 000000000000..b532e127b56e --- /dev/null +++ b/drivers/rtc/rtc-rtd119x.c @@ -0,0 +1,175 @@ +/* + * Realtek RTD129x RTC + * + * Copyright (c) 2017 Andreas Färber + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include +#include +#include +#include +#include +#include +#include + +#define RTD_RTCSEC 0x00 +#define RTD_RTCMIN 0x04 +#define RTD_RTCHR 0x08 +#define RTD_RTCDATE_LOW 0x0c +#define RTD_RTCDATE_HIGH 0x10 +#define RTD_RTCACR 0x28 +#define RTD_RTCEN 0x2c + +struct rtd119x_rtc { + void __iomem *base; + struct clk *clk; + struct rtc_device *rtcdev; + unsigned base_year; +}; + +static void rtd119x_rtc_set_enabled(struct device *dev, bool enable) +{ + struct rtd119x_rtc *data = dev_get_drvdata(dev); + u32 val; + + val = readl_relaxed(data->base + RTD_RTCEN); + dev_info(dev, "%s: rtcen = 0x%08x\n", __func__, val); + if (enable) { + if ((val & 0xff) == 0x5a) + return; + writel_relaxed(0x5a, data->base + RTD_RTCEN); + } else { + writel_relaxed(0, data->base + RTD_RTCEN); + } +} + +static int rtd119x_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct rtd119x_rtc *data = dev_get_drvdata(dev); + time64_t t; + u32 day; + + day = readl_relaxed(data->base + RTD_RTCDATE_LOW); + day |= readl_relaxed(data->base + RTD_RTCDATE_HIGH) << 8; + t = mktime64(data->base_year, 1, 1, 0, 0, 0); + t += day * 24 * 60 * 60; + rtc_time64_to_tm(t, tm); + tm->tm_sec = readl_relaxed(data->base + RTD_RTCSEC) >> 1; + tm->tm_min = readl_relaxed(data->base + RTD_RTCMIN); + tm->tm_hour = readl_relaxed(data->base + RTD_RTCHR); + + return rtc_valid_tm(tm); +} + +static int rtd119x_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct rtd119x_rtc *data = dev_get_drvdata(dev); + time64_t time_base, new_time, time_delta; + unsigned long day; + + if (tm->tm_year < data->base_year) + return -EINVAL; + + time_base = mktime64(data->base_year, 1, 1, 0, 0, 0); + new_time = rtc_tm_to_time64(tm); + time_delta = new_time - time_base; + day = time_delta / (24 * 60 * 60); + if (day > 0x7fff) + return -EINVAL; + + rtd119x_rtc_set_enabled(dev, false); + + writel_relaxed(tm->tm_sec, data->base + RTD_RTCSEC); + writel_relaxed(tm->tm_min, data->base + RTD_RTCMIN); + writel_relaxed(tm->tm_hour, data->base + RTD_RTCHR); + writel_relaxed(day & 0xff, data->base + RTD_RTCDATE_LOW); + writel_relaxed((day >> 8) & 0x7f, data->base + RTD_RTCDATE_HIGH); + + rtd119x_rtc_set_enabled(dev, true); + + return 0; +} + +static int rtd119x_rtc_open(struct device *dev) +{ + struct rtd119x_rtc *data = dev_get_drvdata(dev); + u32 val; + int ret; + + ret = clk_prepare_enable(data->clk); + if (ret) + return ret; + + val = readl_relaxed(data->base + RTD_RTCACR); + dev_info(dev, "rtcacr = 0x%08x\n", val); + if (!(val & BIT(7))) { + } + + rtd119x_rtc_set_enabled(dev, true); + + return 0; +} + +static void rtd119x_rtc_release(struct device *dev) +{ + struct rtd119x_rtc *data = dev_get_drvdata(dev); + + rtd119x_rtc_set_enabled(dev, false); + + clk_disable_unprepare(data->clk); +} + +static const struct rtc_class_ops rtd119x_rtc_ops = { + .open = rtd119x_rtc_open, + .release = rtd119x_rtc_release, + .read_time = rtd119x_rtc_read_time, + .set_time = rtd119x_rtc_set_time, +}; + +static const struct of_device_id rtd119x_rtc_dt_ids[] = { + { .compatible = "realtek,rtd1295-rtc" }, + { } +}; + +static int rtd119x_rtc_probe(struct platform_device *pdev) +{ + struct rtd119x_rtc *data; + struct resource *res; + + data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + platform_set_drvdata(pdev, data); + data->base_year = 2014; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + data->base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(data->base)) + return PTR_ERR(data->base); + + data->clk = of_clk_get(pdev->dev.of_node, 0); + if (IS_ERR(data->clk)) + return PTR_ERR(data->clk); + + data->rtcdev = devm_rtc_device_register(&pdev->dev, "rtc", + &rtd119x_rtc_ops, THIS_MODULE); + if (IS_ERR(data->rtcdev)) { + dev_err(&pdev->dev, "failed to register rtc device"); + clk_put(data->clk); + return PTR_ERR(data->rtcdev); + } + + return 0; +} + +static struct platform_driver rtd119x_rtc_driver = { + .probe = rtd119x_rtc_probe, + .driver = { + .name = "rtd1295-rtc", + .of_match_table = rtd119x_rtc_dt_ids, + }, +}; +builtin_platform_driver(rtd119x_rtc_driver);