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Tue, 1 Nov 2022 20:53:44 +0000 (GMT) From: Eddie James To: linux-watchdog@vger.kernel.org Cc: wim@linux-watchdog.org, linux@roeck-us.net, joel@jms.id.au, andrew@aj.id.au, linux-aspeed@lists.ozlabs.org, linux-kernel@vger.kernel.org, Eddie James Subject: [PATCH v2 1/2] watchdog: aspeed: Enable pre-timeout interrupt Date: Tue, 1 Nov 2022 15:53:37 -0500 Message-Id: <20221101205338.577427-2-eajames@linux.ibm.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20221101205338.577427-1-eajames@linux.ibm.com> References: <20221101205338.577427-1-eajames@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: JIinSzOHHvw6UltKJCmy61hYP48g3HWt X-Proofpoint-ORIG-GUID: JIinSzOHHvw6UltKJCmy61hYP48g3HWt 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=2022-11-01_10,2022-11-01_02,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 spamscore=0 phishscore=0 mlxscore=0 priorityscore=1501 impostorscore=0 malwarescore=0 suspectscore=0 mlxlogscore=999 bulkscore=0 adultscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2210170000 definitions=main-2211010145 X-Spam-Status: No, score=-2.0 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_EF,RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1748328685888913207?= X-GMAIL-MSGID: =?utf-8?q?1748328685888913207?= Enable the core pre-timeout interrupt on AST2500 and AST2600. Signed-off-by: Eddie James Reviewed-by: Guenter Roeck --- drivers/watchdog/aspeed_wdt.c | 104 ++++++++++++++++++++++++++++------ 1 file changed, 88 insertions(+), 16 deletions(-) diff --git a/drivers/watchdog/aspeed_wdt.c b/drivers/watchdog/aspeed_wdt.c index 0cff2adfbfc9..86b5331bc491 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 @@ -18,28 +21,41 @@ module_param(nowayout, bool, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); +struct aspeed_wdt_config { + u32 ext_pulse_width_mask; + u32 irq_shift; + u32 irq_mask; +}; + struct aspeed_wdt { struct watchdog_device wdd; void __iomem *base; u32 ctrl; -}; - -struct aspeed_wdt_config { - u32 ext_pulse_width_mask; + const struct aspeed_wdt_config *cfg; }; 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 +74,7 @@ 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) @@ -160,6 +177,26 @@ static int aspeed_wdt_set_timeout(struct watchdog_device *wdd, return 0; } +static int aspeed_wdt_set_pretimeout(struct watchdog_device *wdd, + unsigned int pretimeout) +{ + struct aspeed_wdt *wdt = to_aspeed_wdt(wdd); + u32 actual = pretimeout * WDT_RATE_1MHZ; + u32 s = wdt->cfg->irq_shift; + u32 m = wdt->cfg->irq_mask; + + wdd->pretimeout = pretimeout; + wdt->ctrl &= ~m; + if (pretimeout) + wdt->ctrl |= ((actual << s) & m) | WDT_CTRL_WDT_INTR; + else + wdt->ctrl &= ~WDT_CTRL_WDT_INTR; + + writel(wdt->ctrl, wdt->base + WDT_CTRL); + + return 0; +} + static int aspeed_wdt_restart(struct watchdog_device *wdd, unsigned long action, void *data) { @@ -232,6 +269,7 @@ static const struct watchdog_ops aspeed_wdt_ops = { .stop = aspeed_wdt_stop, .ping = aspeed_wdt_ping, .set_timeout = aspeed_wdt_set_timeout, + .set_pretimeout = aspeed_wdt_set_pretimeout, .restart = aspeed_wdt_restart, .owner = THIS_MODULE, }; @@ -243,10 +281,29 @@ static const struct watchdog_info aspeed_wdt_info = { .identity = KBUILD_MODNAME, }; +static const struct watchdog_info aspeed_wdt_pretimeout_info = { + .options = WDIOF_KEEPALIVEPING + | WDIOF_PRETIMEOUT + | WDIOF_MAGICCLOSE + | WDIOF_SETTIMEOUT, + .identity = KBUILD_MODNAME, +}; + +static irqreturn_t aspeed_wdt_irq(int irq, void *arg) +{ + struct watchdog_device *wdd = arg; + struct aspeed_wdt *wdt = to_aspeed_wdt(wdd); + u32 status = readl(wdt->base + WDT_TIMEOUT_STATUS); + + if (status & WDT_TIMEOUT_STATUS_IRQ) + watchdog_notify_pretimeout(wdd); + + return IRQ_HANDLED; +} + static int aspeed_wdt_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; - const struct aspeed_wdt_config *config; const struct of_device_id *ofdid; struct aspeed_wdt *wdt; struct device_node *np; @@ -259,11 +316,33 @@ static int aspeed_wdt_probe(struct platform_device *pdev) if (!wdt) return -ENOMEM; + np = dev->of_node; + + ofdid = of_match_node(aspeed_wdt_of_table, np); + if (!ofdid) + return -EINVAL; + wdt->cfg = ofdid->data; + wdt->base = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(wdt->base)) return PTR_ERR(wdt->base); wdt->wdd.info = &aspeed_wdt_info; + + if (wdt->cfg->irq_mask) { + int irq = platform_get_irq_optional(pdev, 0); + + if (irq > 0) { + ret = devm_request_irq(dev, irq, aspeed_wdt_irq, + IRQF_SHARED, dev_name(dev), + wdt); + if (ret) + return ret; + + wdt->wdd.info = &aspeed_wdt_pretimeout_info; + } + } + wdt->wdd.ops = &aspeed_wdt_ops; wdt->wdd.max_hw_heartbeat_ms = WDT_MAX_TIMEOUT_MS; wdt->wdd.parent = dev; @@ -273,13 +352,6 @@ static int aspeed_wdt_probe(struct platform_device *pdev) watchdog_set_nowayout(&wdt->wdd, nowayout); - np = dev->of_node; - - ofdid = of_match_node(aspeed_wdt_of_table, np); - if (!ofdid) - return -EINVAL; - config = ofdid->data; - /* * On clock rates: * - ast2400 wdt can run at PCLK, or 1MHz @@ -331,7 +403,7 @@ static int aspeed_wdt_probe(struct platform_device *pdev) (of_device_is_compatible(np, "aspeed,ast2600-wdt"))) { u32 reg = readl(wdt->base + WDT_RESET_WIDTH); - reg &= config->ext_pulse_width_mask; + reg &= wdt->cfg->ext_pulse_width_mask; if (of_property_read_bool(np, "aspeed,ext-active-high")) reg |= WDT_ACTIVE_HIGH_MAGIC; else @@ -339,7 +411,7 @@ static int aspeed_wdt_probe(struct platform_device *pdev) writel(reg, wdt->base + WDT_RESET_WIDTH); - reg &= config->ext_pulse_width_mask; + reg &= wdt->cfg->ext_pulse_width_mask; if (of_property_read_bool(np, "aspeed,ext-push-pull")) reg |= WDT_PUSH_PULL_MAGIC; else @@ -349,7 +421,7 @@ static int aspeed_wdt_probe(struct platform_device *pdev) } if (!of_property_read_u32(np, "aspeed,ext-pulse-duration", &duration)) { - u32 max_duration = config->ext_pulse_width_mask + 1; + u32 max_duration = wdt->cfg->ext_pulse_width_mask + 1; if (duration == 0 || duration > max_duration) { dev_err(dev, "Invalid pulse duration: %uus\n", From patchwork Tue Nov 1 20:53:38 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eddie James X-Patchwork-Id: 13863 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:6687:0:0:0:0:0 with SMTP id l7csp3202092wru; Tue, 1 Nov 2022 13:55:38 -0700 (PDT) X-Google-Smtp-Source: AMsMyM79DgJFpYOzep5jiJ+7iEYm0HdE9/zu3WZFNEs38scNcyhlbu6bq6zNUfIe1ZtIJQ3iH/QG X-Received: by 2002:a63:8943:0:b0:46f:3a91:3618 with SMTP id v64-20020a638943000000b0046f3a913618mr18951627pgd.16.1667336137804; 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Tue, 1 Nov 2022 20:53:45 +0000 (GMT) From: Eddie James To: linux-watchdog@vger.kernel.org Cc: wim@linux-watchdog.org, linux@roeck-us.net, joel@jms.id.au, andrew@aj.id.au, linux-aspeed@lists.ozlabs.org, linux-kernel@vger.kernel.org, Eddie James Subject: [PATCH v2 2/2] ARM: dts: aspeed: Setup watchdog pre-timeout interrupt Date: Tue, 1 Nov 2022 15:53:38 -0500 Message-Id: <20221101205338.577427-3-eajames@linux.ibm.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20221101205338.577427-1-eajames@linux.ibm.com> References: <20221101205338.577427-1-eajames@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: Urz1o1Ls_Q7DovowQi2QNTaCyLyNcOpL X-Proofpoint-GUID: Urz1o1Ls_Q7DovowQi2QNTaCyLyNcOpL 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=2022-11-01_09,2022-11-01_02,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 lowpriorityscore=0 phishscore=0 impostorscore=0 mlxscore=0 suspectscore=0 adultscore=0 malwarescore=0 priorityscore=1501 mlxlogscore=810 spamscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2210170000 definitions=main-2211010145 X-Spam-Status: No, score=-2.0 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_EF,RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1748328658116767391?= X-GMAIL-MSGID: =?utf-8?q?1748328658116767391?= Specify the interrupt lines for the base SOCs that support it. Signed-off-by: Eddie James Acked-by: Guenter Roeck --- arch/arm/boot/dts/aspeed-g5.dtsi | 3 +++ arch/arm/boot/dts/aspeed-g6.dtsi | 4 ++++ 2 files changed, 7 insertions(+) diff --git a/arch/arm/boot/dts/aspeed-g5.dtsi b/arch/arm/boot/dts/aspeed-g5.dtsi index 04f98d1dbb97..b4b98bf38e48 100644 --- a/arch/arm/boot/dts/aspeed-g5.dtsi +++ b/arch/arm/boot/dts/aspeed-g5.dtsi @@ -410,18 +410,21 @@ wdt1: watchdog@1e785000 { compatible = "aspeed,ast2500-wdt"; reg = <0x1e785000 0x20>; clocks = <&syscon ASPEED_CLK_APB>; + interrupts = <27>; }; wdt2: watchdog@1e785020 { compatible = "aspeed,ast2500-wdt"; reg = <0x1e785020 0x20>; clocks = <&syscon ASPEED_CLK_APB>; + interrupts = <27>; }; wdt3: watchdog@1e785040 { compatible = "aspeed,ast2500-wdt"; reg = <0x1e785040 0x20>; clocks = <&syscon ASPEED_CLK_APB>; + interrupts = <27>; status = "disabled"; }; diff --git a/arch/arm/boot/dts/aspeed-g6.dtsi b/arch/arm/boot/dts/aspeed-g6.dtsi index ebbcfe445d9c..d9379fd7b1c2 100644 --- a/arch/arm/boot/dts/aspeed-g6.dtsi +++ b/arch/arm/boot/dts/aspeed-g6.dtsi @@ -539,23 +539,27 @@ uart5: serial@1e784000 { wdt1: watchdog@1e785000 { compatible = "aspeed,ast2600-wdt"; + interrupts = ; reg = <0x1e785000 0x40>; }; wdt2: watchdog@1e785040 { compatible = "aspeed,ast2600-wdt"; + interrupts = ; reg = <0x1e785040 0x40>; status = "disabled"; }; wdt3: watchdog@1e785080 { compatible = "aspeed,ast2600-wdt"; + interrupts = ; reg = <0x1e785080 0x40>; status = "disabled"; }; wdt4: watchdog@1e7850c0 { compatible = "aspeed,ast2600-wdt"; + interrupts = ; reg = <0x1e7850C0 0x40>; status = "disabled"; };