From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 936CEC33CB1 for ; Wed, 15 Jan 2020 09:09:09 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 4BCBA2081E for ; Wed, 15 Jan 2020 09:09:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="L7cF6qLG"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="gN4ypSzR" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4BCBA2081E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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=zlcAk3tIZ+nF4OVy/ONz1L8fs4hNUXjRJ5RbboaIqa4=; b=L7cF6qLGeKp42t /ZeUHPmmh21toUAxjpHl9I4am/9ntUAKXcVLpFESxa79+FgE5sLOKI52gMvxRxuUv1fyZV7FAW2Ez OkH8gHgB40xqH5GrhijQ/Sb21yKrmgkwlQ0DrY7KZWevuu+Eey6Kg0HNehPoEN2yCKSzAO8BHqLJg zRyT9W8eU594qy5TYAe+XmmLUNYnCyN8dsF2ogxnA84KcOVGu4CM0fecolrtdNl/mO5BJXnT1TpCw viJhg+bz7G/ZL066FicKVWHovnZH7/DNGl5sdcLYLQr1+inY5Tm83E5nBCjITTUqXdQnkG+vl94a+ LgerOumH6np9L1phicSg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1irefi-0006Q3-1x; Wed, 15 Jan 2020 09:09:06 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1irefN-0006AC-OK; Wed, 15 Jan 2020 09:08:49 +0000 X-UUID: 5e0b3be6346842bb8e9a56b5a10b83e5-20200115 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Transfer-Encoding:Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=OWebwlJmPjQUyZsgZT7yhsR6B658n0exctGVwv9Gnxc=; b=gN4ypSzRTVM82MSiJzoHRf7Bd/scRhgcnlFA9wqrLN4OtylE+UA/D9RviL0WSXlAZtg4Af82oaUzqkJ96pFPybhBJvAWHDm4ozv5kbpRbmh6M26GFbN6x8BF16lSNREKsoLkwu6zO7rpkkXS7FLLJ8YnPpRuoklkD/RkDFEYoeA=; X-UUID: 5e0b3be6346842bb8e9a56b5a10b83e5-20200115 Received: from mtkcas66.mediatek.inc [(172.29.193.44)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 1689198287; Wed, 15 Jan 2020 01:08:43 -0800 Received: from mtkmbs05n1.mediatek.inc (172.21.101.15) by MTKMBS62N1.mediatek.inc (172.29.193.41) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Wed, 15 Jan 2020 00:59:32 -0800 Received: from mtkcas08.mediatek.inc (172.21.101.126) by mtkmbs05n1.mediatek.inc (172.21.101.15) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Wed, 15 Jan 2020 16:58:03 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkcas08.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Wed, 15 Jan 2020 16:58:45 +0800 From: Yong Liang To: , , , , , , , , , , , , Subject: [PATCH v12 3/4] watchdog: mtk_wdt: mt8183: Add reset controller Date: Wed, 15 Jan 2020 16:58:27 +0800 Message-ID: <20200115085828.27791-4-yong.liang@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20200115085828.27791-1-yong.liang@mediatek.com> References: <20200115085828.27791-1-yong.liang@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200115_010845_795303_C0CD11F5 X-CRM114-Status: GOOD ( 12.91 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: sboyd@kernel.org, yingjoe.chen@mediatek.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: "yong.liang" Add reset controller API in watchdog driver. Besides watchdog, MTK toprgu module alsa provide sub-system (eg, audio, camera, codec and connectivity) software reset functionality. Signed-off-by: yong.liang Signed-off-by: Jiaxin Yu Reviewed-by: Yingjoe Chen Reviewed-by: Philipp Zabel --- drivers/watchdog/mtk_wdt.c | 99 +++++++++++++++++++++++++++++++++++++- 1 file changed, 98 insertions(+), 1 deletion(-) diff --git a/drivers/watchdog/mtk_wdt.c b/drivers/watchdog/mtk_wdt.c index 9c3d0033260d..e88aacb0404d 100644 --- a/drivers/watchdog/mtk_wdt.c +++ b/drivers/watchdog/mtk_wdt.c @@ -9,6 +9,8 @@ * Based on sunxi_wdt.c */ +#include +#include #include #include #include @@ -16,10 +18,11 @@ #include #include #include +#include #include +#include #include #include -#include #define WDT_MAX_TIMEOUT 31 #define WDT_MIN_TIMEOUT 1 @@ -44,6 +47,9 @@ #define WDT_SWRST 0x14 #define WDT_SWRST_KEY 0x1209 +#define WDT_SWSYSRST 0x18U +#define WDT_SWSYS_RST_KEY 0x88000000 + #define DRV_NAME "mtk-wdt" #define DRV_VERSION "1.0" @@ -53,8 +59,90 @@ static unsigned int timeout; struct mtk_wdt_dev { struct watchdog_device wdt_dev; void __iomem *wdt_base; + spinlock_t lock; /* protects WDT_SWSYSRST reg */ + struct reset_controller_dev rcdev; +}; + +struct mtk_wdt_data { + int toprgu_sw_rst_num; }; +static const struct mtk_wdt_data mt8183_data = { + .toprgu_sw_rst_num = MT8183_TOPRGU_SW_RST_NUM, +}; + +static int toprgu_reset_update(struct reset_controller_dev *rcdev, + unsigned long id, bool assert) +{ + unsigned int tmp; + unsigned long flags; + struct mtk_wdt_dev *data = + container_of(rcdev, struct mtk_wdt_dev, rcdev); + + spin_lock_irqsave(&data->lock, flags); + + tmp = readl(data->wdt_base + WDT_SWSYSRST); + if (assert) + tmp |= BIT(id); + else + tmp &= ~BIT(id); + tmp |= WDT_SWSYS_RST_KEY; + writel(tmp, data->wdt_base + WDT_SWSYSRST); + + spin_unlock_irqrestore(&data->lock, flags); + + return 0; +} + +static int toprgu_reset_assert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + return toprgu_reset_update(rcdev, id, true); +} + +static int toprgu_reset_deassert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + return toprgu_reset_update(rcdev, id, false); +} + +static int toprgu_reset(struct reset_controller_dev *rcdev, + unsigned long id) +{ + int ret; + + ret = toprgu_reset_assert(rcdev, id); + if (ret) + return ret; + + return toprgu_reset_deassert(rcdev, id); +} + +static const struct reset_control_ops toprgu_reset_ops = { + .assert = toprgu_reset_assert, + .deassert = toprgu_reset_deassert, + .reset = toprgu_reset, +}; + +static int toprgu_register_reset_controller(struct platform_device *pdev, + int rst_num) +{ + int ret; + struct mtk_wdt_dev *mtk_wdt = platform_get_drvdata(pdev); + + spin_lock_init(&mtk_wdt->lock); + + mtk_wdt->rcdev.owner = THIS_MODULE; + mtk_wdt->rcdev.nr_resets = rst_num; + mtk_wdt->rcdev.ops = &toprgu_reset_ops; + mtk_wdt->rcdev.of_node = pdev->dev.of_node; + ret = devm_reset_controller_register(&pdev->dev, &mtk_wdt->rcdev); + if (ret != 0) + dev_err(&pdev->dev, + "couldn't register wdt reset controller: %d\n", ret); + return ret; +} + static int mtk_wdt_restart(struct watchdog_device *wdt_dev, unsigned long action, void *data) { @@ -155,6 +243,7 @@ static int mtk_wdt_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct mtk_wdt_dev *mtk_wdt; + const struct mtk_wdt_data *wdt_data; int err; mtk_wdt = devm_kzalloc(dev, sizeof(*mtk_wdt), GFP_KERNEL); @@ -190,6 +279,13 @@ static int mtk_wdt_probe(struct platform_device *pdev) dev_info(dev, "Watchdog enabled (timeout=%d sec, nowayout=%d)\n", mtk_wdt->wdt_dev.timeout, nowayout); + wdt_data = of_device_get_match_data(dev); + if (wdt_data) { + err = toprgu_register_reset_controller(pdev, + wdt_data->toprgu_sw_rst_num); + if (err) + return err; + } return 0; } @@ -219,6 +315,7 @@ static int mtk_wdt_resume(struct device *dev) static const struct of_device_id mtk_wdt_dt_ids[] = { { .compatible = "mediatek,mt6589-wdt" }, + { .compatible = "mediatek,mt8183-wdt", .data = &mt8183_data }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, mtk_wdt_dt_ids); -- 2.18.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel