From patchwork Fri Oct 21 15:15:58 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eddie James X-Patchwork-Id: 619164 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 5FC9FC4332F for ; Fri, 21 Oct 2022 15:16:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230263AbiJUPQk (ORCPT ); Fri, 21 Oct 2022 11:16:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46320 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230221AbiJUPQj (ORCPT ); Fri, 21 Oct 2022 11:16:39 -0400 Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D1175272105; Fri, 21 Oct 2022 08:16:36 -0700 (PDT) Received: from pps.filterd (m0098419.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 29LEq0qQ019782; Fri, 21 Oct 2022 15:16:11 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=6yP0KkmkKNxrZlMmPlsCwRN744tV3LFfWXu+cfHsjyo=; b=pCvwDmudxeaF2e/CZN0ulZw5lHjIl2hoddfceXFpboopOILrTweMKImD2Pg2TvhV0bnz +dJudgmPKijH4S1fnkUOqB447voryaG803+gy5fM1zfsVmqVNeD45qANDwOch1MG/N7Z U29S0bKDrkQlWXE6+2l3c9ErRYvkUKZ3VreCuuHCalo5DrwdMRah8Odj/T6uNIOx32Q0 EC3jQ0CEiGSt9H/ccEQBIALadUFDsuXAzkx+XFcupCZAPqEfbnDp0OsQit+cb9SWZAV9 tRnoII/rMyY0rJoXlZL94vzaaYpMzY6tKc4ilxdsqD5P7muZcjW+17gG6mGO2g4M2Mxa 9w== Received: from ppma02dal.us.ibm.com (a.bd.3ea9.ip4.static.sl-reverse.com [169.62.189.10]) by mx0b-001b2d01.pphosted.com (PPS) with ESMTPS id 3kbwjk11a4-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 21 Oct 2022 15:16:10 +0000 Received: from pps.filterd (ppma02dal.us.ibm.com [127.0.0.1]) by ppma02dal.us.ibm.com (8.16.1.2/8.16.1.2) with SMTP id 29LF6MCX026720; Fri, 21 Oct 2022 15:16:10 GMT Received: from b01cxnp22036.gho.pok.ibm.com (b01cxnp22036.gho.pok.ibm.com [9.57.198.26]) by ppma02dal.us.ibm.com with ESMTP id 3k7mgb07x5-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 21 Oct 2022 15:16:10 +0000 Received: from smtpav04.wdc07v.mail.ibm.com ([9.208.128.116]) by b01cxnp22036.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 29LFG8Xe30540262 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 21 Oct 2022 15:16:09 GMT Received: from smtpav04.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 5E6585805F; Fri, 21 Oct 2022 15:16:08 +0000 (GMT) Received: from smtpav04.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id BD52C58056; Fri, 21 Oct 2022 15:16:06 +0000 (GMT) Received: from slate16.aus.stglabs.ibm.com (unknown [9.160.163.86]) by smtpav04.wdc07v.mail.ibm.com (Postfix) with ESMTP; Fri, 21 Oct 2022 15:16:06 +0000 (GMT) From: Eddie James To: linux-watchdog@vger.kernel.org Cc: linux-aspeed@lists.ozlabs.org, linux-kernel@vger.kernel.org, wim@linux-watchdog.org, linux@roeck-us.net, andrew@aj.id.au, joel@jms.id.au, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, devicetree@vger.kernel.org, Eddie James Subject: [PATCH 1/2] watchdog: aspeed: Add pre-timeout interrupt support Date: Fri, 21 Oct 2022 10:15:58 -0500 Message-Id: <20221021151559.781983-2-eajames@linux.ibm.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20221021151559.781983-1-eajames@linux.ibm.com> References: <20221021151559.781983-1-eajames@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: ZJQ7Zf2xb6NIjbugIw57ReXgB9Y_GmP1 X-Proofpoint-GUID: ZJQ7Zf2xb6NIjbugIw57ReXgB9Y_GmP1 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.895,Hydra:6.0.545,FMLib:17.11.122.1 definitions=2022-10-21_04,2022-10-21_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 priorityscore=1501 malwarescore=0 phishscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 spamscore=0 adultscore=0 suspectscore=0 bulkscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2209130000 definitions=main-2210210090 Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@vger.kernel.org Enable the pre-timeout interrupt if requested by device property. Signed-off-by: Eddie James --- drivers/watchdog/aspeed_wdt.c | 53 +++++++++++++++++++++++++++++++++-- 1 file changed, 51 insertions(+), 2 deletions(-) diff --git a/drivers/watchdog/aspeed_wdt.c b/drivers/watchdog/aspeed_wdt.c index 0cff2adfbfc9..8e12181a827e 100644 --- a/drivers/watchdog/aspeed_wdt.c +++ b/drivers/watchdog/aspeed_wdt.c @@ -5,11 +5,14 @@ * Joel Stanley */ +#include #include +#include #include #include #include #include +#include #include #include @@ -26,20 +29,32 @@ struct aspeed_wdt { struct aspeed_wdt_config { u32 ext_pulse_width_mask; + u32 irq_shift; + u32 irq_mask; }; static const struct aspeed_wdt_config ast2400_config = { .ext_pulse_width_mask = 0xff, + .irq_shift = 0, + .irq_mask = 0, }; static const struct aspeed_wdt_config ast2500_config = { .ext_pulse_width_mask = 0xfffff, + .irq_shift = 12, + .irq_mask = GENMASK(31, 12), +}; + +static const struct aspeed_wdt_config ast2600_config = { + .ext_pulse_width_mask = 0xfffff, + .irq_shift = 0, + .irq_mask = GENMASK(31, 10), }; static const struct of_device_id aspeed_wdt_of_table[] = { { .compatible = "aspeed,ast2400-wdt", .data = &ast2400_config }, { .compatible = "aspeed,ast2500-wdt", .data = &ast2500_config }, - { .compatible = "aspeed,ast2600-wdt", .data = &ast2500_config }, + { .compatible = "aspeed,ast2600-wdt", .data = &ast2600_config }, { }, }; MODULE_DEVICE_TABLE(of, aspeed_wdt_of_table); @@ -58,6 +73,7 @@ MODULE_DEVICE_TABLE(of, aspeed_wdt_of_table); #define WDT_CTRL_RESET_SYSTEM BIT(1) #define WDT_CTRL_ENABLE BIT(0) #define WDT_TIMEOUT_STATUS 0x10 +#define WDT_TIMEOUT_STATUS_IRQ BIT(2) #define WDT_TIMEOUT_STATUS_BOOT_SECONDARY BIT(1) #define WDT_CLEAR_TIMEOUT_STATUS 0x14 #define WDT_CLEAR_TIMEOUT_AND_BOOT_CODE_SELECTION BIT(0) @@ -243,6 +259,17 @@ static const struct watchdog_info aspeed_wdt_info = { .identity = KBUILD_MODNAME, }; +static irqreturn_t aspeed_wdt_irq(int irq, void *arg) +{ + struct aspeed_wdt *wdt = arg; + u32 status = readl(wdt->base + WDT_TIMEOUT_STATUS); + + if (status & WDT_TIMEOUT_STATUS_IRQ) + panic("Watchdog pre-timeout IRQ"); + + return IRQ_NONE; +} + static int aspeed_wdt_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -253,6 +280,7 @@ static int aspeed_wdt_probe(struct platform_device *pdev) const char *reset_type; u32 duration; u32 status; + u32 timeout = 0; int ret; wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL); @@ -291,6 +319,27 @@ static int aspeed_wdt_probe(struct platform_device *pdev) if (of_device_is_compatible(np, "aspeed,ast2400-wdt")) wdt->ctrl = WDT_CTRL_1MHZ_CLK; + if (config->irq_mask) { + if (!of_property_read_u32(np, "aspeed,pre-timeout-irq-us", &timeout) && timeout) { + int irq = platform_get_irq(pdev, 0); + + if (irq < 0) { + dev_warn(dev, "Couldn't find IRQ: %d\n", irq); + timeout = 0; + } else { + ret = devm_request_irq(dev, irq, aspeed_wdt_irq, IRQF_SHARED, + dev_name(dev), wdt); + if (ret) { + dev_warn(dev, "Couldn't request IRQ:%d\n", ret); + timeout = 0; + } else { + wdt->ctrl |= ((timeout << config->irq_shift) & + config->irq_mask) | WDT_CTRL_WDT_INTR; + } + } + } + } + /* * Control reset on a per-device basis to ensure the * host is not affected by a BMC reboot @@ -308,7 +357,7 @@ static int aspeed_wdt_probe(struct platform_device *pdev) else if (!strcmp(reset_type, "system")) wdt->ctrl |= WDT_CTRL_RESET_MODE_FULL_CHIP | WDT_CTRL_RESET_SYSTEM; - else if (strcmp(reset_type, "none")) + else if (strcmp(reset_type, "none") && !timeout) return -EINVAL; } if (of_property_read_bool(np, "aspeed,external-signal"))