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[88.10.60.23]) by smtp.gmail.com with ESMTPSA id p13-20020a05600c468d00b003e001afa274sm5359820wmo.2.2023.02.10.04.17.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 10 Feb 2023 04:17:39 -0800 (PST) From: Sergio Paracuellos To: linux-watchdog@vger.kernel.org Cc: wim@linux-watchdog.org, linux@roeck-us.net, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, matthias.bgg@gmail.com, arinc.unal@arinc9.com, tsbogend@alpha.franken.de, p.zabel@pengutronix.de, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-mips@vger.kernel.org Subject: [PATCH v2 2/4] mips: dts: ralink: mt7621: add phandle to system controller node for watchdog Date: Fri, 10 Feb 2023 13:17:33 +0100 Message-Id: <20230210121735.639089-3-sergio.paracuellos@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230210121735.639089-1-sergio.paracuellos@gmail.com> References: <20230210121735.639089-1-sergio.paracuellos@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org To allow to access system controller registers from watchdog driver code add a phandle in the watchdog 'wdt' node. This avoid using arch dependent operations in driver code. Signed-off-by: Sergio Paracuellos --- arch/mips/boot/dts/ralink/mt7621.dtsi | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/mips/boot/dts/ralink/mt7621.dtsi b/arch/mips/boot/dts/ralink/mt7621.dtsi index 5ca40fd21..1a1c017d7 100644 --- a/arch/mips/boot/dts/ralink/mt7621.dtsi +++ b/arch/mips/boot/dts/ralink/mt7621.dtsi @@ -73,6 +73,7 @@ sysc: syscon@0 { wdt: wdt@100 { compatible = "mediatek,mt7621-wdt"; reg = <0x100 0x100>; + ralink,sysctl = <&sysc>; }; gpio: gpio@600 { From patchwork Fri Feb 10 12:17:35 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sergio Paracuellos X-Patchwork-Id: 652534 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 91DEFC636D3 for ; Fri, 10 Feb 2023 12:17:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232312AbjBJMRr (ORCPT ); Fri, 10 Feb 2023 07:17:47 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40566 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231893AbjBJMRq (ORCPT ); Fri, 10 Feb 2023 07:17:46 -0500 Received: from mail-wm1-x334.google.com (mail-wm1-x334.google.com [IPv6:2a00:1450:4864:20::334]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C41CD7289B; Fri, 10 Feb 2023 04:17:44 -0800 (PST) Received: by mail-wm1-x334.google.com with SMTP id m16-20020a05600c3b1000b003dc4050c94aso3916277wms.4; Fri, 10 Feb 2023 04:17:44 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=85Jcqp/n5GNk4Jt2RN2nNjpswbRqJZ3Mt7tqEL5Vzsk=; b=KU4zhpdKF64gnPrZSYtRctPRLhs18rAmuzm73jQWx1HnMfCJmhcCsD+puNvmFx+wTM 5hXWGs2wYVB6tzARbIFZfdIZJs2E5L1ikjnoRMy/8mlq52h69ra1WH7cB/ScK+hyUtns UmIHo3Qx996o1d4Y4+ExP0Kemq34n0F8Z9U9krPtWLpi6+z04spnIPlebMOe5m//ZtZB OUJSgL44cDCq8MsKd+lYeFqcBXrVCtuT1K4BIGziyzMr57rcHLMsaMe98/WF+XvDjYCY KksOnWAtCKu8o1xCcdAVGHl/BgRAbAbGGII6aFreadXRE9xpjdGPVyggPsFjDeYV/oeo sJSQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version: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=85Jcqp/n5GNk4Jt2RN2nNjpswbRqJZ3Mt7tqEL5Vzsk=; b=5VQuAvjQOE/9Fvx6qKrDiTDSzzKEmoVw/9lXxpkG5oA0YVFpubtl0IoUpJg7U83Yym 3ouwE1cXR+EFWPgg9eawFNeyKOZj0ZBsisVxQWCXh6W0WusKPcjctlwW+43N6aj7AD89 gcOsG43DJDXFQ1oZqnq8o+6rQxJ3zR3SUa+il9qzOVUcNm3+Z1wGYHCifV9WW1felrjA AeGS9tkQ3WEkhL7YQFDEb3/tIxtK8kc5FUD+8gI8PkTt/4q77fWjiIPhMBOd41z6cTJI y/3dchTFPxpZdZUNhdt4w+M0AcLAaYOKDHeJR+AWJ6juIu8P6uZsaQNshR/i97gBjXWk mzRQ== X-Gm-Message-State: AO0yUKV4zDZwVX9D/keOjchd7eGw5R7SQmSjDsw1+9F8j8fhs/x7UjX1 EtcTtZKCy64VTE9cVTlgBUqyLhkHULw= X-Google-Smtp-Source: AK7set+qS6x4BJ+LtKe95F/2SO4xZ8r/N6WDScelOSSAg3g2uSEJKjzn5Lnq9yVuJJ9xzfPxkUroEw== X-Received: by 2002:a05:600c:1887:b0:3dc:4318:d00d with SMTP id x7-20020a05600c188700b003dc4318d00dmr12224825wmp.11.1676031462935; Fri, 10 Feb 2023 04:17:42 -0800 (PST) Received: from localhost.localdomain (23.red-88-10-60.dynamicip.rima-tde.net. [88.10.60.23]) by smtp.gmail.com with ESMTPSA id p13-20020a05600c468d00b003e001afa274sm5359820wmo.2.2023.02.10.04.17.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 10 Feb 2023 04:17:42 -0800 (PST) From: Sergio Paracuellos To: linux-watchdog@vger.kernel.org Cc: wim@linux-watchdog.org, linux@roeck-us.net, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, matthias.bgg@gmail.com, arinc.unal@arinc9.com, tsbogend@alpha.franken.de, p.zabel@pengutronix.de, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-mips@vger.kernel.org Subject: [PATCH v2 4/4] watchdog: mt7621-wdt: avoid ralink architecture dependent code Date: Fri, 10 Feb 2023 13:17:35 +0100 Message-Id: <20230210121735.639089-5-sergio.paracuellos@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230210121735.639089-1-sergio.paracuellos@gmail.com> References: <20230210121735.639089-1-sergio.paracuellos@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org MT7621 SoC has a system controller node. Watchdog need to access to reset status register. Ralink architecture and related driver are old and from the beggining they are using some architecture dependent operations for accessing this shared registers through 'asm/mach-ralink/ralink_regs.h' header file. However this is not ideal from a driver perspective which can just access to the system controller registers in an arch independent way using regmap syscon APIs. Update Kconfig accordingly to select new added dependencies and allow driver to be compile tested. Signed-off-by: Sergio Paracuellos --- drivers/watchdog/Kconfig | 2 ++ drivers/watchdog/mt7621_wdt.c | 19 ++++++++++++++----- 2 files changed, 16 insertions(+), 5 deletions(-) diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig index b64bc49c7..0759de670 100644 --- a/drivers/watchdog/Kconfig +++ b/drivers/watchdog/Kconfig @@ -1865,6 +1865,8 @@ config GXP_WATCHDOG config MT7621_WDT tristate "Mediatek SoC watchdog" select WATCHDOG_CORE + select REGMAP_MMIO + select MFD_SYSCON depends on SOC_MT7620 || SOC_MT7621 help Hardware driver for the Mediatek/Ralink MT7621/8 SoC Watchdog Timer. diff --git a/drivers/watchdog/mt7621_wdt.c b/drivers/watchdog/mt7621_wdt.c index f1c702971..a7480fd2b 100644 --- a/drivers/watchdog/mt7621_wdt.c +++ b/drivers/watchdog/mt7621_wdt.c @@ -15,8 +15,8 @@ #include #include #include - -#include +#include +#include #define SYSC_RSTSTAT 0x38 #define WDT_RST_CAUSE BIT(1) @@ -34,6 +34,7 @@ struct mt7621_wdt_data { void __iomem *base; struct reset_control *rst; + struct regmap *sysc; struct watchdog_device wdt; }; @@ -104,9 +105,12 @@ static int mt7621_wdt_stop(struct watchdog_device *w) return 0; } -static int mt7621_wdt_bootcause(void) +static int mt7621_wdt_bootcause(struct mt7621_wdt_data *d) { - if (rt_sysc_r32(SYSC_RSTSTAT) & WDT_RST_CAUSE) + u32 val; + + regmap_read(d->sysc, SYSC_RSTSTAT, &val); + if (val & WDT_RST_CAUSE) return WDIOF_CARDRESET; return 0; @@ -134,6 +138,7 @@ static const struct watchdog_ops mt7621_wdt_ops = { static int mt7621_wdt_probe(struct platform_device *pdev) { + struct device_node *np = pdev->dev.of_node; struct device *dev = &pdev->dev; struct watchdog_device *mt7621_wdt; struct mt7621_wdt_data *drvdata; @@ -143,6 +148,10 @@ static int mt7621_wdt_probe(struct platform_device *pdev) if (!drvdata) return -ENOMEM; + drvdata->sysc = syscon_regmap_lookup_by_phandle(np, "ralink,sysctl"); + if (IS_ERR(drvdata->sysc)) + return PTR_ERR(drvdata->sysc); + drvdata->base = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(drvdata->base)) return PTR_ERR(drvdata->base); @@ -158,7 +167,7 @@ static int mt7621_wdt_probe(struct platform_device *pdev) mt7621_wdt->max_timeout = 0xfffful / 1000; mt7621_wdt->parent = dev; - mt7621_wdt->bootstatus = mt7621_wdt_bootcause(); + mt7621_wdt->bootstatus = mt7621_wdt_bootcause(drvdata); watchdog_init_timeout(mt7621_wdt, mt7621_wdt->max_timeout, dev); watchdog_set_nowayout(mt7621_wdt, nowayout);