From patchwork Fri Sep 6 09:36:27 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Junhao Xie X-Patchwork-Id: 826781 Received: from classfun.cn (unknown [129.204.178.38]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 603AE1C9EC9; Fri, 6 Sep 2024 09:38:07 +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=1725615489; cv=none; b=puEpLY6pVVL0LS/CEEFr4BG0SzjLS6S+M0fTzaaFxLjWY/e5o+U5Tv/1zI8ojoXFqaXsPFDWP/ae5vmt1Yuy7BylqGm6UX3f3x4KcVW6MTig27bRDFXJSnpuqRiH5YtlYCzv4TKLwrjILrL/1NbVvCFnCJNzdGbKfRn8wURIuUM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725615489; c=relaxed/simple; bh=cPe1l/N2Y4GytOpRXevXAgco60FS3vlGfaHoXL772Pw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=I8yKqfuH+KqfMFQlMFgYCc5LsywmspkrcBVoNAH/tUuzLldkV8nknaKl2HX8mdQuxFGWvJsECVUHl1esjn7LWr8fJrjrmd8BIwaDNtCQK3g57wn68j2NgS77OIYuQ8bSlEhXuoHW33uNM8pXj0C7j8k7zWtgsHviwYPwj3Cu0Fc= 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=IW16Shis; 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="IW16Shis" Received: from bigfoot-server-storage.classfun.cn (unknown [124.72.163.35]) (Authenticated sender: bigfoot) by classfun.cn (Postfix) with ESMTPSA id 4D17B78A04; Fri, 6 Sep 2024 17:38:05 +0800 (CST) DKIM-Filter: OpenDKIM Filter v2.11.0 classfun.cn 4D17B78A04 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=classfun.cn; s=default; t=1725615486; bh=xBIuGqHHQKbj1aEL07HdEcSje5Cmnydbi71SAu4uHH8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IW16ShisTcPT/5bUhzlGahPqRntDnIUdGDjNnaJ41T2fCyUOEOWLajtl+agYo9JU6 1Muz4OnsolNeir1WSIuEPz1wqBw7muXWysmc4Q0s5cXS0cd5hrvu2lCkJ4xzns/O67 AGxvySiFHHcHPOy9HNORmIopzcifr+OY24DrtTBU= 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 6/9] hwmon: Add support for Photonicat PMU board temperature sensor Date: Fri, 6 Sep 2024 17:36:27 +0800 Message-ID: <20240906093630.2428329-7-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-leds@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Photonicat PMU MCU will send status reports regularly, including board temperature. Signed-off-by: Junhao Xie --- drivers/hwmon/Kconfig | 10 +++ drivers/hwmon/Makefile | 1 + drivers/hwmon/photonicat-hwmon.c | 129 +++++++++++++++++++++++++++++++ 3 files changed, 140 insertions(+) create mode 100644 drivers/hwmon/photonicat-hwmon.c diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index b60fe2e58ad6..b345e4856bcf 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -1781,6 +1781,16 @@ config SENSORS_PT5161L This driver can also be built as a module. If so, the module will be called pt5161l. +config SENSORS_PHOTONICAT_PMU_HWMON + tristate "Photonicat PMU temperature sensor" + depends on MFD_PHOTONICAT_PMU + help + If you say yes here you get support for temperature sensor on the + Photonicat PMU. + + This driver can also be built as a module. If so, the module + will be called photonicat-hwmon. + config SENSORS_PWM_FAN tristate "PWM fan" depends on PWM || COMPILE_TEST diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile index b1c7056c37db..a30658acb093 100644 --- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile @@ -183,6 +183,7 @@ obj-$(CONFIG_SENSORS_OXP) += oxp-sensors.o obj-$(CONFIG_SENSORS_PC87360) += pc87360.o obj-$(CONFIG_SENSORS_PC87427) += pc87427.o obj-$(CONFIG_SENSORS_PCF8591) += pcf8591.o +obj-$(CONFIG_SENSORS_PHOTONICAT_PMU_HWMON) += photonicat-hwmon.o obj-$(CONFIG_SENSORS_POWERZ) += powerz.o obj-$(CONFIG_SENSORS_POWR1220) += powr1220.o obj-$(CONFIG_SENSORS_PT5161L) += pt5161l.o diff --git a/drivers/hwmon/photonicat-hwmon.c b/drivers/hwmon/photonicat-hwmon.c new file mode 100644 index 000000000000..f1e3ee5f5781 --- /dev/null +++ b/drivers/hwmon/photonicat-hwmon.c @@ -0,0 +1,129 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2024 Junhao Xie + */ + +#include +#include +#include +#include +#include +#include + +struct pcat_hwmon { + struct device *dev; + struct pcat_pmu *pmu; + struct notifier_block nb; + struct device *hwmon; + int temperature; + struct completion initial_report; +}; + +static ssize_t temp1_input_show(struct device *dev, + struct device_attribute *devattr, char *buf) +{ + struct pcat_hwmon *hwmon = dev_get_drvdata(dev); + + return sprintf(buf, "%d\n", hwmon->temperature * 1000); +} + +static DEVICE_ATTR_RO(temp1_input); + +static struct attribute *pcat_pmu_temp_attrs[] = { + &dev_attr_temp1_input.attr, + NULL +}; + +ATTRIBUTE_GROUPS(pcat_pmu_temp); + +static int pcat_hwmon_notify(struct notifier_block *nb, unsigned long action, + void *data) +{ + struct pcat_hwmon *hwmon = container_of(nb, struct pcat_hwmon, nb); + struct pcat_data_cmd_status *status = pcat_data_get_data(data); + + if (action != PCAT_CMD_STATUS_REPORT) + return NOTIFY_DONE; + + hwmon->temperature = status->temp - 40; + complete(&hwmon->initial_report); + + return NOTIFY_DONE; +} + +static int pcat_hwmon_probe(struct platform_device *pdev) +{ + int ret; + struct device *dev = &pdev->dev; + struct pcat_hwmon *hwmon; + const char *label; + + hwmon = devm_kzalloc(dev, sizeof(*hwmon), GFP_KERNEL); + if (!hwmon) + return -ENOMEM; + + hwmon->dev = dev; + hwmon->pmu = dev_get_drvdata(dev->parent); + hwmon->nb.notifier_call = pcat_hwmon_notify; + init_completion(&hwmon->initial_report); + platform_set_drvdata(pdev, hwmon); + + ret = of_property_read_string(dev->of_node, "label", &label); + if (ret) + return dev_err_probe(dev, ret, "No label property\n"); + + ret = pcat_pmu_register_notify(hwmon->pmu, &hwmon->nb); + if (ret) + return ret; + + if (!wait_for_completion_timeout(&hwmon->initial_report, + msecs_to_jiffies(3000))) { + ret = dev_err_probe(dev, -ETIMEDOUT, + "timeout waiting for initial report\n"); + goto error; + } + + dev_info(dev, "Board Temprature: %d degress C\n", hwmon->temperature); + + hwmon->hwmon = devm_hwmon_device_register_with_groups( + dev, label, hwmon, pcat_pmu_temp_groups); + + if (IS_ERR(hwmon->hwmon)) { + ret = PTR_ERR(hwmon->hwmon); + dev_err_probe(&pdev->dev, ret, + "Failed to register hwmon device\n"); + goto error; + } + + return 0; +error: + pcat_pmu_unregister_notify(hwmon->pmu, &hwmon->nb); + return ret; +} + +static void pcat_hwmon_remove(struct platform_device *pdev) +{ + struct pcat_hwmon *hwmon = platform_get_drvdata(pdev); + + pcat_pmu_unregister_notify(hwmon->pmu, &hwmon->nb); +} + +static const struct of_device_id pcat_hwmon_dt_ids[] = { + { .compatible = "ariaboard,photonicat-pmu-hwmon", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, pcat_hwmon_dt_ids); + +static struct platform_driver pcat_hwmon_driver = { + .driver = { + .name = "photonicat-hwmon", + .of_match_table = pcat_hwmon_dt_ids, + }, + .probe = pcat_hwmon_probe, + .remove = pcat_hwmon_remove, +}; +module_platform_driver(pcat_hwmon_driver); + +MODULE_AUTHOR("Junhao Xie "); +MODULE_DESCRIPTION("Photonicat PMU Hardware Monitor"); +MODULE_LICENSE("GPL");