From patchwork Fri Feb 10 17:38:38 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sergio Paracuellos X-Patchwork-Id: 13136062 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 668EBC64EC7 for ; Fri, 10 Feb 2023 17:38:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232713AbjBJRiu (ORCPT ); Fri, 10 Feb 2023 12:38:50 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45120 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232547AbjBJRit (ORCPT ); Fri, 10 Feb 2023 12:38:49 -0500 Received: from mail-wm1-x336.google.com (mail-wm1-x336.google.com [IPv6:2a00:1450:4864:20::336]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 22FE434F55; Fri, 10 Feb 2023 09:38:48 -0800 (PST) Received: by mail-wm1-x336.google.com with SMTP id f23-20020a05600c491700b003dff4480a17so5733906wmp.1; Fri, 10 Feb 2023 09:38:48 -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=BnXrkD6mC1X9wvYtsECorUK6F5CsiEFkvfTGl5Os3Dw=; b=iPgPTDYO2Ay92Hea++NHzSXGW3gZOjxG1nkOgA8Awp1gUIfV0gbewJxnduW7lAaLU1 GW03L/PvBFDfA5oF2hFAECaSoPDyL5dYtxI5XHFQd+aKRHByYk4t8SEyvPL4CV0VVwO1 eCy9xOsmcvq2Dgw0VuAc6XJURlo51VuPcznEsFlq5ItkpONAtAPP0gp0g27FtNI6F0fI 3mJlQ98PurpaYcUAxJ1AoR2ZhXDLBBqBGpXIEVVyvxwI5KiWVP0e9McR4w4Sow5ntSG9 o2AgE/QNmtE0b5YHvzop45Sw5meH1AusWMbwADTGnSJ6zsDoJtRcH9AmbOXeCz1B0JpW izMw== 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=BnXrkD6mC1X9wvYtsECorUK6F5CsiEFkvfTGl5Os3Dw=; b=OG2xpWx7BYNxxYK9hTHlGQlAe1FA2UinsDBkbCqLurppvhFZZsG/CFnW7btSWu3Dgr FT07mCiPcRkcVKbuObvHv2U1LDcy8ZXcbAskOVctFRxyYhwk+XZVCGpqW9Z0+SPM3Rjj mbjON97EbX8Fn9hBcYDEIpJKDZELe+ZhaPSZulDK3ruwqB0m2lHYqL/jBfK/aCLZ2Uus DY8MJ5iYgshZekghh+6a4SQvbvmjjnFyRjgywUgl0FGckp4uWtAgcN8iTnbdpenED5mk XDHh90/jvddgB5ksuTb0yGzY6//cum5hECZ3nfQyarPUQm5ZbDiwRP4xT6VjlCI0SoyL mp+Q== X-Gm-Message-State: AO0yUKVZb36/QKUKUll0IGyweZnJkouUk27uySMyW+ybtDsMwsqdrvYi HXh6WAwm0GzwCYSg9mLvGTSJRyxPQTA= X-Google-Smtp-Source: AK7set+xRVV4i5HZDKgxWBRd1Yo6qxEkshf/bLoHKTn9oFGCAh7VbbMtKcc3lS+sBHEUOIeYNM4CJA== X-Received: by 2002:a05:600c:2e88:b0:3da:acb1:2f09 with SMTP id p8-20020a05600c2e8800b003daacb12f09mr13551762wmn.19.1676050726123; Fri, 10 Feb 2023 09:38:46 -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 t2-20020a0560001a4200b002c3ef7e74bdsm4024184wry.73.2023.02.10.09.38.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 10 Feb 2023 09:38:45 -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 v3 1/4] dt-bindings: watchdog: mt7621-wdt: add phandle to access system controller registers Date: Fri, 10 Feb 2023 18:38:38 +0100 Message-Id: <20230210173841.705783-2-sergio.paracuellos@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230210173841.705783-1-sergio.paracuellos@gmail.com> References: <20230210173841.705783-1-sergio.paracuellos@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org MT7621 SoC provides a system controller node for accessing to some registers. Add a phandle in this node to avoid using MIPS related arch operations and includes in watchdog driver code. Signed-off-by: Sergio Paracuellos --- .../devicetree/bindings/watchdog/mediatek,mt7621-wdt.yaml | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/Documentation/devicetree/bindings/watchdog/mediatek,mt7621-wdt.yaml b/Documentation/devicetree/bindings/watchdog/mediatek,mt7621-wdt.yaml index b2b17fdf4..a668d0c2f 100644 --- a/Documentation/devicetree/bindings/watchdog/mediatek,mt7621-wdt.yaml +++ b/Documentation/devicetree/bindings/watchdog/mediatek,mt7621-wdt.yaml @@ -19,6 +19,12 @@ properties: reg: maxItems: 1 + mediatek,sysctl: + $ref: /schemas/types.yaml#/definitions/phandle + description: + phandle to system controller 'sysc' syscon node which + controls system registers + required: - compatible - reg @@ -30,4 +36,5 @@ examples: watchdog@100 { compatible = "mediatek,mt7621-wdt"; reg = <0x100 0x100>; + mediatek,sysctl = <&sysc>; }; From patchwork Fri Feb 10 17:38:39 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sergio Paracuellos X-Patchwork-Id: 13136063 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 05CC0C678DB for ; Fri, 10 Feb 2023 17:38:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232771AbjBJRiv (ORCPT ); Fri, 10 Feb 2023 12:38:51 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45136 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232040AbjBJRiu (ORCPT ); Fri, 10 Feb 2023 12:38:50 -0500 Received: from mail-wr1-x429.google.com (mail-wr1-x429.google.com [IPv6:2a00:1450:4864:20::429]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5380078D69; Fri, 10 Feb 2023 09:38:49 -0800 (PST) Received: by mail-wr1-x429.google.com with SMTP id o18so5808576wrj.3; Fri, 10 Feb 2023 09:38:49 -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=u2xLyJ53huQXvmhIZNGemIcemfb0LptCrFwxhBre8f0=; b=QeXug14ZYhPwh1A1nviyUmCNZR+UPZMEuJoTlsG1KDTelZQOtYWRk4jM0MwlyUyccr i8y7Sc8uDWxsU4I2grHQAoA7l2UEXUwMS6xa4l8hIHl0wshPvoP9vaZaNwOXQYuoQqFa eJAl5PubnAp+T0+lrfSfLRAaWBBjeKR0x2R3h/I+lkVL9SqbHHJex9NhU1z9vICs2ZrQ Gi64XUMraReUY5y7j5k92Fln6HNw0eqDFGMSnVOxRL9UJ+J53h7jOVklgrDpFkoeGRDi H5rkDljfXIHz9CPxIvxVEkTP50Qx3xUAW+Nl4iKv1AARdEMmLVztqdiK4Hm/1gbg0+jo I8Qg== 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=u2xLyJ53huQXvmhIZNGemIcemfb0LptCrFwxhBre8f0=; b=w3wR2O7mQ6xvJcD+I8vAdntKB0wI75gSvrR4ld4k22BnwKlxIH6oSafSvE2Z23kUEg p92lYE/t/x9rSZAnESki9ZUXajbDXDCk68jJSi3dCaYBcQPDiCWW2YRoUNGN85j0XSYt /glVpcIVjSQHPI4y1syweXkyVx6olZ0lAvsHiSefaDIyc3Uh4WNqC/fSEcC2QzX+oW+X oE2yHz44XGpUq7BD0GPGmhLTtqQEv14V/gIZC1aGKwdsNN4RqgTuumEyW6qM3ptsGgzw sWzmznNJIYFTYUeJbQHMW0wX+sz2UhpcC+viViXyllMVvPkO2JJ22ZWUn6riSVOMGeoV f4bw== X-Gm-Message-State: AO0yUKUgvTRbi8r8fWjDwzVcCobSuePqDhM2c8Z38u7AxRoNPookRFCh AMcTl4LXkumwio6Q593KzoathbAiAaM= X-Google-Smtp-Source: AK7set9d8R2n74KRRpb/gH9QTXaWCfqv/EbYCh2oQQsd2asD/crb95F5is94KTSd+CjR6OLYT2QA7Q== X-Received: by 2002:adf:dc04:0:b0:2c3:ea92:3494 with SMTP id t4-20020adfdc04000000b002c3ea923494mr13961199wri.55.1676050727559; Fri, 10 Feb 2023 09:38:47 -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 t2-20020a0560001a4200b002c3ef7e74bdsm4024184wry.73.2023.02.10.09.38.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 10 Feb 2023 09:38:47 -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 v3 2/4] mips: dts: ralink: mt7621: add phandle to system controller node for watchdog Date: Fri, 10 Feb 2023 18:38:39 +0100 Message-Id: <20230210173841.705783-3-sergio.paracuellos@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230210173841.705783-1-sergio.paracuellos@gmail.com> References: <20230210173841.705783-1-sergio.paracuellos@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-mips@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..764916eaf 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>; + mediatek,sysctl = <&sysc>; }; gpio: gpio@600 { From patchwork Fri Feb 10 17:38:40 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sergio Paracuellos X-Patchwork-Id: 13136065 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 E04D4C636D7 for ; Fri, 10 Feb 2023 17:38:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232893AbjBJRi4 (ORCPT ); Fri, 10 Feb 2023 12:38:56 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45178 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232792AbjBJRiv (ORCPT ); Fri, 10 Feb 2023 12:38:51 -0500 Received: from mail-wr1-x42f.google.com (mail-wr1-x42f.google.com [IPv6:2a00:1450:4864:20::42f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A977879B31; Fri, 10 Feb 2023 09:38:50 -0800 (PST) Received: by mail-wr1-x42f.google.com with SMTP id ba1so5789725wrb.5; Fri, 10 Feb 2023 09:38:50 -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=WWIrI7GlbPy0iZefry4elWWnc1hRjMVBj4i9Rxqr8Yc=; b=AewavYUNMs+O3DcWuqDhUscBXSXxCghisTHyTVN53BMLafVtiGKXHfHi1L8MIa8bXq DDImyJM+j2tqjg4FX+f/89iJxjFJWxGQYqmRN4ADO950PRiKZsqkM5n05nwka1EYAEgd cvbHBq7AsOJG5n4xR0nDR6TuBWxwgDEPwpTejTBEVGTNuyB+d0aOtnd1e64hQ2DT/HxX 10Rwv17fxBJN6lEwTn3/4fI+/9IAO7tM3kFOLV/6y+JWqHhzf4cVLM3atoC3SV+4aGvp H2jErORbQLO0/hXfvxlWwtMgXrdLoiBOjmtSr+xye6+1/HgGRCeD27wTogUzFJUB60C5 LNDQ== 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=WWIrI7GlbPy0iZefry4elWWnc1hRjMVBj4i9Rxqr8Yc=; b=ZQu3bptvQDBnYC9rJLIf9VSk660glDktIiK+AOfQG54df7jLceBmUsxwawuI/eWhVU WahtnLfs1bz1MqvBcKIVPiXXMlEEw+JXNewPXmVpia7hTUiQczb6MkNXn1U0bDvbSKza AgruEPDwvsg4I1C1dUXym6rdSj1LFf9knUXI73+ocQLljQBus5mIG0vEXPJeV2zO5CHO 0VAWKu/iFRilzbXDHOayymU5wmJ84O14OyYnP+pKKoSeClQ3nuNyT96ZTdEBNruRmu3w ePMSX9A2YYd0PqvBcJNbZHtS82LXb5xSTA7cXRsx5OLSQqokrAFbaBme9deCacntLZvx ktlw== X-Gm-Message-State: AO0yUKX+PfgffCxL66FaJqd3USCnAiRJFsoq62viuX+ePYbABeuHDlOC JVpSf15Z2syTViaYKjx+X7A5lcsFdac= X-Google-Smtp-Source: AK7set+OcbVazuOGm8Yxky0/ZTVijKOujMqhTBQqhKOMxc58yu3KG8iTNEs9FgudWZjwd8Y14eQK6Q== X-Received: by 2002:a5d:42cf:0:b0:2c3:efe7:607c with SMTP id t15-20020a5d42cf000000b002c3efe7607cmr13823006wrr.6.1676050728829; Fri, 10 Feb 2023 09:38:48 -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 t2-20020a0560001a4200b002c3ef7e74bdsm4024184wry.73.2023.02.10.09.38.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 10 Feb 2023 09:38:48 -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 v3 3/4] watchdog: mt7621-wdt: avoid static global declarations Date: Fri, 10 Feb 2023 18:38:40 +0100 Message-Id: <20230210173841.705783-4-sergio.paracuellos@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230210173841.705783-1-sergio.paracuellos@gmail.com> References: <20230210173841.705783-1-sergio.paracuellos@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org Instead of using static global definitions in driver code, refactor code introducing a new watchdog driver data structure and use it along the code. Signed-off-by: Sergio Paracuellos Reviewed-by: Guenter Roeck --- drivers/watchdog/mt7621_wdt.c | 102 ++++++++++++++++++++++------------ 1 file changed, 65 insertions(+), 37 deletions(-) diff --git a/drivers/watchdog/mt7621_wdt.c b/drivers/watchdog/mt7621_wdt.c index a8aa3522c..40fb2c9ba 100644 --- a/drivers/watchdog/mt7621_wdt.c +++ b/drivers/watchdog/mt7621_wdt.c @@ -31,8 +31,11 @@ #define TMR1CTL_RESTART BIT(9) #define TMR1CTL_PRESCALE_SHIFT 16 -static void __iomem *mt7621_wdt_base; -static struct reset_control *mt7621_wdt_reset; +struct mt7621_wdt_data { + void __iomem *base; + struct reset_control *rst; + struct watchdog_device wdt; +}; static bool nowayout = WATCHDOG_NOWAYOUT; module_param(nowayout, bool, 0); @@ -40,27 +43,31 @@ MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); -static inline void rt_wdt_w32(unsigned reg, u32 val) +static inline void rt_wdt_w32(void __iomem *base, unsigned reg, u32 val) { - iowrite32(val, mt7621_wdt_base + reg); + iowrite32(val, base + reg); } -static inline u32 rt_wdt_r32(unsigned reg) +static inline u32 rt_wdt_r32(void __iomem *base, unsigned reg) { - return ioread32(mt7621_wdt_base + reg); + return ioread32(base + reg); } static int mt7621_wdt_ping(struct watchdog_device *w) { - rt_wdt_w32(TIMER_REG_TMRSTAT, TMR1CTL_RESTART); + struct mt7621_wdt_data *drvdata = watchdog_get_drvdata(w); + + rt_wdt_w32(drvdata->base, TIMER_REG_TMRSTAT, TMR1CTL_RESTART); return 0; } static int mt7621_wdt_set_timeout(struct watchdog_device *w, unsigned int t) { + struct mt7621_wdt_data *drvdata = watchdog_get_drvdata(w); + w->timeout = t; - rt_wdt_w32(TIMER_REG_TMR1LOAD, t * 1000); + rt_wdt_w32(drvdata->base, TIMER_REG_TMR1LOAD, t * 1000); mt7621_wdt_ping(w); return 0; @@ -68,29 +75,31 @@ static int mt7621_wdt_set_timeout(struct watchdog_device *w, unsigned int t) static int mt7621_wdt_start(struct watchdog_device *w) { + struct mt7621_wdt_data *drvdata = watchdog_get_drvdata(w); u32 t; /* set the prescaler to 1ms == 1000us */ - rt_wdt_w32(TIMER_REG_TMR1CTL, 1000 << TMR1CTL_PRESCALE_SHIFT); + rt_wdt_w32(drvdata->base, TIMER_REG_TMR1CTL, 1000 << TMR1CTL_PRESCALE_SHIFT); mt7621_wdt_set_timeout(w, w->timeout); - t = rt_wdt_r32(TIMER_REG_TMR1CTL); + t = rt_wdt_r32(drvdata->base, TIMER_REG_TMR1CTL); t |= TMR1CTL_ENABLE; - rt_wdt_w32(TIMER_REG_TMR1CTL, t); + rt_wdt_w32(drvdata->base, TIMER_REG_TMR1CTL, t); return 0; } static int mt7621_wdt_stop(struct watchdog_device *w) { + struct mt7621_wdt_data *drvdata = watchdog_get_drvdata(w); u32 t; mt7621_wdt_ping(w); - t = rt_wdt_r32(TIMER_REG_TMR1CTL); + t = rt_wdt_r32(drvdata->base, TIMER_REG_TMR1CTL); t &= ~TMR1CTL_ENABLE; - rt_wdt_w32(TIMER_REG_TMR1CTL, t); + rt_wdt_w32(drvdata->base, TIMER_REG_TMR1CTL, t); return 0; } @@ -105,7 +114,9 @@ static int mt7621_wdt_bootcause(void) static int mt7621_wdt_is_running(struct watchdog_device *w) { - return !!(rt_wdt_r32(TIMER_REG_TMR1CTL) & TMR1CTL_ENABLE); + struct mt7621_wdt_data *drvdata = watchdog_get_drvdata(w); + + return !!(rt_wdt_r32(drvdata->base, TIMER_REG_TMR1CTL) & TMR1CTL_ENABLE); } static const struct watchdog_info mt7621_wdt_info = { @@ -121,30 +132,39 @@ static const struct watchdog_ops mt7621_wdt_ops = { .set_timeout = mt7621_wdt_set_timeout, }; -static struct watchdog_device mt7621_wdt_dev = { - .info = &mt7621_wdt_info, - .ops = &mt7621_wdt_ops, - .min_timeout = 1, - .max_timeout = 0xfffful / 1000, -}; - static int mt7621_wdt_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; - mt7621_wdt_base = devm_platform_ioremap_resource(pdev, 0); - if (IS_ERR(mt7621_wdt_base)) - return PTR_ERR(mt7621_wdt_base); + struct watchdog_device *mt7621_wdt; + struct mt7621_wdt_data *drvdata; + int err; + + drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL); + if (!drvdata) + return -ENOMEM; - mt7621_wdt_reset = devm_reset_control_get_exclusive(dev, NULL); - if (!IS_ERR(mt7621_wdt_reset)) - reset_control_deassert(mt7621_wdt_reset); + drvdata->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(drvdata->base)) + return PTR_ERR(drvdata->base); - mt7621_wdt_dev.bootstatus = mt7621_wdt_bootcause(); + drvdata->rst = devm_reset_control_get_exclusive(dev, NULL); + if (!IS_ERR(drvdata->rst)) + reset_control_deassert(drvdata->rst); - watchdog_init_timeout(&mt7621_wdt_dev, mt7621_wdt_dev.max_timeout, - dev); - watchdog_set_nowayout(&mt7621_wdt_dev, nowayout); - if (mt7621_wdt_is_running(&mt7621_wdt_dev)) { + mt7621_wdt = &drvdata->wdt; + mt7621_wdt->info = &mt7621_wdt_info; + mt7621_wdt->ops = &mt7621_wdt_ops; + mt7621_wdt->min_timeout = 1; + mt7621_wdt->max_timeout = 0xfffful / 1000; + mt7621_wdt->parent = dev; + + mt7621_wdt->bootstatus = mt7621_wdt_bootcause(); + + watchdog_init_timeout(mt7621_wdt, mt7621_wdt->max_timeout, dev); + watchdog_set_nowayout(mt7621_wdt, nowayout); + watchdog_set_drvdata(mt7621_wdt, drvdata); + + if (mt7621_wdt_is_running(mt7621_wdt)) { /* * Make sure to apply timeout from watchdog core, taking * the prescaler of this driver here into account (the @@ -154,17 +174,25 @@ static int mt7621_wdt_probe(struct platform_device *pdev) * we first disable the watchdog, set the new prescaler * and timeout, and then re-enable the watchdog. */ - mt7621_wdt_stop(&mt7621_wdt_dev); - mt7621_wdt_start(&mt7621_wdt_dev); - set_bit(WDOG_HW_RUNNING, &mt7621_wdt_dev.status); + mt7621_wdt_stop(mt7621_wdt); + mt7621_wdt_start(mt7621_wdt); + set_bit(WDOG_HW_RUNNING, &mt7621_wdt->status); } - return devm_watchdog_register_device(dev, &mt7621_wdt_dev); + err = devm_watchdog_register_device(dev, &drvdata->wdt); + if (err) + return err; + + platform_set_drvdata(pdev, drvdata); + + return 0; } static void mt7621_wdt_shutdown(struct platform_device *pdev) { - mt7621_wdt_stop(&mt7621_wdt_dev); + struct mt7621_wdt_data *drvdata = platform_get_drvdata(pdev); + + mt7621_wdt_stop(&drvdata->wdt); } static const struct of_device_id mt7621_wdt_match[] = { From patchwork Fri Feb 10 17:38:41 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sergio Paracuellos X-Patchwork-Id: 13136064 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 C0837C64EC6 for ; 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[88.10.60.23]) by smtp.gmail.com with ESMTPSA id t2-20020a0560001a4200b002c3ef7e74bdsm4024184wry.73.2023.02.10.09.38.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 10 Feb 2023 09:38:49 -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 v3 4/4] watchdog: mt7621-wdt: avoid ralink architecture dependent code Date: Fri, 10 Feb 2023 18:38:41 +0100 Message-Id: <20230210173841.705783-5-sergio.paracuellos@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230210173841.705783-1-sergio.paracuellos@gmail.com> References: <20230210173841.705783-1-sergio.paracuellos@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-mips@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 Reviewed-by: Guenter Roeck --- 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 40fb2c9ba..9ed07c187 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, "mediatek,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);