From patchwork Fri Sep 6 09:36:24 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Junhao Xie X-Patchwork-Id: 13793779 Received: from classfun.cn (unknown [129.204.178.38]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 9086F1C86F6; Fri, 6 Sep 2024 09:38:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=129.204.178.38 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725615485; cv=none; b=kT7Dcnmh9ZTFDNWsDnbTglEU7bYfM/ATmPOlQQl4p9cWhrdFhCQXhNpP5I5EYyFSDBsBewL9syznm1PjuaqdL1jT14RsaQhqaHTHNnp7DS4oz3HUWQYUgMsmb2VASl54bvAZBbQeWY9MdUi7R3AXRm56Dgi/Pk7uXNTMeLiDjcw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725615485; c=relaxed/simple; bh=LfPgJ9L7ipnqXTC1RE0Chy7mvYPec7F2PG4Ztb0NhtA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=DZIXRFgdSDaWOB9Hg92/KG3K93GTXo+DPejAHkI3AtCu0BFYTYfefAa3fNaBOgOD2bBpTzgc/AafHC+TJGEc1Bfa0xBG+HKwNL2oyIiti9nhYBlvUk4uRKe34lM66g5lR/jHp7SumHsGU89zPS+pmWe9IESzy657QD1R1KBbobY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=classfun.cn; spf=pass smtp.mailfrom=classfun.cn; dkim=pass (1024-bit key) header.d=classfun.cn header.i=@classfun.cn header.b=cOWjLARj; arc=none smtp.client-ip=129.204.178.38 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=classfun.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=classfun.cn Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=classfun.cn header.i=@classfun.cn header.b="cOWjLARj" Received: from bigfoot-server-storage.classfun.cn (unknown [124.72.163.35]) (Authenticated sender: bigfoot) by classfun.cn (Postfix) with ESMTPSA id 7478E78A01; Fri, 6 Sep 2024 17:38:01 +0800 (CST) DKIM-Filter: OpenDKIM Filter v2.11.0 classfun.cn 7478E78A01 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=classfun.cn; s=default; t=1725615482; bh=/BoOWIWGCb24d6nKmXmJ9+eWvMhDf9jlRmzVWBVGxXQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=cOWjLARj/yCmcU4XoKmi9pd17fR2pQn017YQRLfZnjNNFdtVg+/NxX8N/wGLQgqBV +6F7mi4pWMpY9tNkv4vo886Hnh2wna5hr+BsqTMhRHDv27oGf0jhw1aIsxP59Z2qQb Ig42NdTjLQF+pv67M8nvmHgVkL9M7v/BXRao4204= From: Junhao Xie To: devicetree@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-kernel@vger.kernel.org, linux-leds@vger.kernel.org, linux-pm@vger.kernel.org, linux-rtc@vger.kernel.org, linux-watchdog@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org Cc: Jean Delvare , Guenter Roeck , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Pavel Machek , Lee Jones , Sebastian Reichel , Alexandre Belloni , Wim Van Sebroeck , Heiko Stuebner , Chukun Pan , Junhao Xie Subject: [PATCH 3/9] watchdog: Add Photonicat PMU watchdog driver Date: Fri, 6 Sep 2024 17:36:24 +0800 Message-ID: <20240906093630.2428329-4-bigfoot@classfun.cn> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20240906093630.2428329-1-bigfoot@classfun.cn> References: <20240906093630.2428329-1-bigfoot@classfun.cn> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 This driver provides access to Photonicat PMU watchdog functionality. Signed-off-by: Junhao Xie --- drivers/watchdog/Kconfig | 12 +++ drivers/watchdog/Makefile | 1 + drivers/watchdog/photonicat-wdt.c | 124 ++++++++++++++++++++++++++++++ 3 files changed, 137 insertions(+) create mode 100644 drivers/watchdog/photonicat-wdt.c diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig index bae1d97cce89..4094216a1c09 100644 --- a/drivers/watchdog/Kconfig +++ b/drivers/watchdog/Kconfig @@ -300,6 +300,18 @@ config MENZ069_WATCHDOG This driver can also be built as a module. If so the module will be called menz069_wdt. +config PHOTONICAT_PMU_WDT + tristate "Photonicat PMU Watchdog" + depends on MFD_PHOTONICAT_PMU + select WATCHDOG_CORE + help + This driver provides access to Photonicat PMU watchdog functionality. + + Say Y here to include support for the Photonicat PMU Watchdog. + + This driver can also be built as a module. If so the module + will be called photonicat-wdt. + config WDAT_WDT tristate "ACPI Watchdog Action Table (WDAT)" depends on ACPI diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile index b51030f035a6..14375af84039 100644 --- a/drivers/watchdog/Makefile +++ b/drivers/watchdog/Makefile @@ -234,6 +234,7 @@ obj-$(CONFIG_ZIIRAVE_WATCHDOG) += ziirave_wdt.o obj-$(CONFIG_SOFT_WATCHDOG) += softdog.o obj-$(CONFIG_MENF21BMC_WATCHDOG) += menf21bmc_wdt.o obj-$(CONFIG_MENZ069_WATCHDOG) += menz69_wdt.o +obj-$(CONFIG_PHOTONICAT_PMU_WDT) += photonicat-wdt.o obj-$(CONFIG_RAVE_SP_WATCHDOG) += rave-sp-wdt.o obj-$(CONFIG_STPMIC1_WATCHDOG) += stpmic1_wdt.o obj-$(CONFIG_SL28CPLD_WATCHDOG) += sl28cpld_wdt.o diff --git a/drivers/watchdog/photonicat-wdt.c b/drivers/watchdog/photonicat-wdt.c new file mode 100644 index 000000000000..1e758fcfb49f --- /dev/null +++ b/drivers/watchdog/photonicat-wdt.c @@ -0,0 +1,124 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2024 Junhao Xie + */ + +#include +#include +#include +#include +#include + +struct pcat_watchdog { + struct device *dev; + struct pcat_pmu *pmu; + struct watchdog_device wdd; + u8 timeout; + bool started; +}; + +static const struct watchdog_info pcat_wdt_info = { + .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE, + .identity = "Photonicat PMU Watchdog", +}; + +static int pcat_wdt_setup(struct pcat_watchdog *data, int timeout) +{ + int ret; + u8 time = 0; + u8 times[3] = { 60, 60, 0 }; + + time = MIN(255, MAX(0, timeout)); + + ret = pcat_pmu_write_data(data->pmu, PCAT_CMD_WATCHDOG_TIMEOUT_SET, + times, sizeof(times)); + if (!ret) + data->started = timeout != 0; + + return ret; +} + +static int pcat_wdt_start(struct watchdog_device *wdev) +{ + struct pcat_watchdog *data = watchdog_get_drvdata(wdev); + + return pcat_wdt_setup(data, data->timeout); +} + +static int pcat_wdt_stop(struct watchdog_device *wdev) +{ + struct pcat_watchdog *data = watchdog_get_drvdata(wdev); + + return pcat_wdt_setup(data, 0); +} + +static int pcat_wdt_ping(struct watchdog_device *wdev) +{ + struct pcat_watchdog *data = watchdog_get_drvdata(wdev); + + return pcat_pmu_send(data->pmu, PCAT_CMD_HEARTBEAT, NULL, 0); +} + +static int pcat_wdt_set_timeout(struct watchdog_device *wdev, unsigned int val) +{ + int ret = 0; + struct pcat_watchdog *data = watchdog_get_drvdata(wdev); + + data->timeout = val; + if (data->started) + ret = pcat_wdt_setup(data, data->timeout); + + return ret; +} + +static const struct watchdog_ops pcat_wdt_ops = { + .owner = THIS_MODULE, + .start = pcat_wdt_start, + .stop = pcat_wdt_stop, + .ping = pcat_wdt_ping, + .set_timeout = pcat_wdt_set_timeout, +}; + +static int pcat_watchdog_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct pcat_watchdog *watchdog; + + watchdog = devm_kzalloc(dev, sizeof(*watchdog), GFP_KERNEL); + if (!watchdog) + return -ENOMEM; + + watchdog->dev = dev; + watchdog->pmu = dev_get_drvdata(dev->parent); + watchdog->wdd.info = &pcat_wdt_info; + watchdog->wdd.ops = &pcat_wdt_ops; + watchdog->wdd.timeout = 60; + watchdog->wdd.max_timeout = U8_MAX; + watchdog->wdd.min_timeout = 0; + watchdog->wdd.parent = dev; + + watchdog_stop_on_reboot(&watchdog->wdd); + watchdog_set_drvdata(&watchdog->wdd, watchdog); + platform_set_drvdata(pdev, watchdog); + + return devm_watchdog_register_device(dev, &watchdog->wdd); +} + +static const struct of_device_id pcat_watchdog_dt_ids[] = { + { .compatible = "ariaboard,photonicat-pmu-watchdog", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, pcat_watchdog_dt_ids); + +static struct platform_driver pcat_watchdog_driver = { + .driver = { + .name = "photonicat-watchdog", + .of_match_table = pcat_watchdog_dt_ids, + }, + .probe = pcat_watchdog_probe, +}; +module_platform_driver(pcat_watchdog_driver); + +MODULE_AUTHOR("Junhao Xie "); +MODULE_DESCRIPTION("Photonicat PMU watchdog"); +MODULE_LICENSE("GPL");