From patchwork Fri Sep 6 09:36:23 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Junhao Xie X-Patchwork-Id: 13793817 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 68B87CE7AFC for ; Fri, 6 Sep 2024 09:48:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=fPuodRfmaTupdvzBrA91yFT2O0NMhuRwoRu03bUlJyU=; b=mvUwfkz0X7fq0+b7jprUFrJ0cj BMAmBTwBMTKpRu5DI/une21e+vyzZ7g2lCXBMJs6FPd4wROkCVQ+GZykn9fRiVZRMcALWA93C5Std H2uu9UZh02X2lRuJhCeNlglDCZASISWetWaOIfK7VGiHO6ri3BKvq2Rh9OFssoVWrITlT5n+Zciht E2CXTXYhU7faew17fbXdOg+Bb/gV4TXODhAM49iZ7KPPXMn0enSovvoCcqJ4S8K3WKbH2HtAXCE7n ZYUfB9COagzTu8tzGRUKjNwSyDu4Mo4YM7aOgu5VuLPj+0ONlb5Rcf2qDtpDJqZXQmxTC/OahInP0 wH1UkSfw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1smVZI-0000000BbEF-2JPh; Fri, 06 Sep 2024 09:47:52 +0000 Received: from [129.204.178.38] (helo=classfun.cn) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1smVPm-0000000BXh4-2sex; Fri, 06 Sep 2024 09:38:04 +0000 Received: from bigfoot-server-storage.classfun.cn (unknown [124.72.163.35]) (Authenticated sender: bigfoot) by classfun.cn (Postfix) with ESMTPSA id 2F61778A00; Fri, 6 Sep 2024 17:38:00 +0800 (CST) DKIM-Filter: OpenDKIM Filter v2.11.0 classfun.cn 2F61778A00 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=classfun.cn; s=default; t=1725615481; bh=fPuodRfmaTupdvzBrA91yFT2O0NMhuRwoRu03bUlJyU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fOCTWDz11oAmKxyxl7ZNdmbpva9MP9akIqev1VahbWt5bdWFmUOdYMGm5+0qeuoCr iMxQgOnQriG+LMDiyffm9a8iHxRXGAYQH2vamqlladTL19ZKsyiSvXitrd+IdvKqsG uxac2OsEj2ioQgmi4Ol8BKjc62ppZ0lwqU6AG76I= 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 2/9] power: reset: add Photonicat PMU poweroff driver Date: Fri, 6 Sep 2024 17:36:23 +0800 Message-ID: <20240906093630.2428329-3-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> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240906_023802_907456_20C524E6 X-CRM114-Status: GOOD ( 20.08 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org This driver implements the shutdown function of Photonicat PMU: - Host notifies PMU to shutdown: When powering off, a shutdown command (0x0F) needs to be sent to the MCU. - PMU notifies host to shutdown: If the power button is long pressed, the MCU will send a shutdown command (0x0D) to the system. If system does not shutdown within 60 seconds, the power will be turned off directly. Signed-off-by: Junhao Xie --- drivers/power/reset/Kconfig | 12 +++ drivers/power/reset/Makefile | 1 + drivers/power/reset/photonicat-poweroff.c | 95 +++++++++++++++++++++++ 3 files changed, 108 insertions(+) create mode 100644 drivers/power/reset/photonicat-poweroff.c diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig index fece990af4a7..c59529ce25a2 100644 --- a/drivers/power/reset/Kconfig +++ b/drivers/power/reset/Kconfig @@ -148,6 +148,18 @@ config POWER_RESET_ODROID_GO_ULTRA_POWEROFF help This driver supports Power off for Odroid Go Ultra device. +config POWER_RESET_PHOTONICAT_POWEROFF + tristate "Photonicat PMU power-off driver" + depends on MFD_PHOTONICAT_PMU + help + This driver supports Power off for Photonicat PMU device. + + Supports operations: + Host notifies PMU to shutdown + PMU notifies host to shutdown + + Say Y if you have a Photonicat board. + config POWER_RESET_PIIX4_POWEROFF tristate "Intel PIIX4 power-off driver" depends on PCI diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile index a95d1bd275d1..339b36812b95 100644 --- a/drivers/power/reset/Makefile +++ b/drivers/power/reset/Makefile @@ -17,6 +17,7 @@ obj-$(CONFIG_POWER_RESET_MT6323) += mt6323-poweroff.o obj-$(CONFIG_POWER_RESET_QCOM_PON) += qcom-pon.o obj-$(CONFIG_POWER_RESET_OCELOT_RESET) += ocelot-reset.o obj-$(CONFIG_POWER_RESET_ODROID_GO_ULTRA_POWEROFF) += odroid-go-ultra-poweroff.o +obj-$(CONFIG_POWER_RESET_PHOTONICAT_POWEROFF) += photonicat-poweroff.o obj-$(CONFIG_POWER_RESET_PIIX4_POWEROFF) += piix4-poweroff.o obj-$(CONFIG_POWER_RESET_LTC2952) += ltc2952-poweroff.o obj-$(CONFIG_POWER_RESET_QNAP) += qnap-poweroff.o diff --git a/drivers/power/reset/photonicat-poweroff.c b/drivers/power/reset/photonicat-poweroff.c new file mode 100644 index 000000000000..f9f1ea179247 --- /dev/null +++ b/drivers/power/reset/photonicat-poweroff.c @@ -0,0 +1,95 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2024 Junhao Xie + */ + +#include +#include +#include +#include +#include + +struct pcat_poweroff { + struct device *dev; + struct pcat_pmu *pmu; + struct notifier_block nb; +}; + +static int pcat_do_poweroff(struct sys_off_data *data) +{ + struct pcat_poweroff *poweroff = data->cb_data; + + dev_info(poweroff->dev, "Host request PMU shutdown\n"); + pcat_pmu_write_data(poweroff->pmu, PCAT_CMD_HOST_REQUEST_SHUTDOWN, + NULL, 0); + + return NOTIFY_DONE; +} + +static int pcat_poweroff_notify(struct notifier_block *nb, unsigned long action, + void *data) +{ + struct pcat_poweroff *poweroff = + container_of(nb, struct pcat_poweroff, nb); + + if (action != PCAT_CMD_PMU_REQUEST_SHUTDOWN) + return NOTIFY_DONE; + + dev_info(poweroff->dev, "PMU request host shutdown\n"); + orderly_poweroff(true); + + return NOTIFY_DONE; +} + +static int pcat_poweroff_probe(struct platform_device *pdev) +{ + int ret; + struct device *dev = &pdev->dev; + struct pcat_poweroff *poweroff; + + poweroff = devm_kzalloc(dev, sizeof(*poweroff), GFP_KERNEL); + if (!poweroff) + return -ENOMEM; + + poweroff->dev = dev; + poweroff->pmu = dev_get_drvdata(dev->parent); + poweroff->nb.notifier_call = pcat_poweroff_notify; + platform_set_drvdata(pdev, poweroff); + + ret = devm_register_sys_off_handler(&pdev->dev, + SYS_OFF_MODE_POWER_OFF, + SYS_OFF_PRIO_DEFAULT, + pcat_do_poweroff, + poweroff); + if (ret) + return ret; + + return pcat_pmu_register_notify(poweroff->pmu, &poweroff->nb); +} + +static void pcat_poweroff_remove(struct platform_device *pdev) +{ + struct pcat_poweroff *poweroff = platform_get_drvdata(pdev); + + pcat_pmu_unregister_notify(poweroff->pmu, &poweroff->nb); +} + +static const struct of_device_id pcat_poweroff_dt_ids[] = { + { .compatible = "ariaboard,photonicat-pmu-poweroff", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, pcat_poweroff_dt_ids); + +static struct platform_driver pcat_poweroff_driver = { + .driver = { + .name = "photonicat-poweroff", + .of_match_table = pcat_poweroff_dt_ids, + }, + .probe = pcat_poweroff_probe, + .remove = pcat_poweroff_remove, +}; +module_platform_driver(pcat_poweroff_driver); + +MODULE_AUTHOR("Junhao Xie "); +MODULE_DESCRIPTION("Photonicat PMU Poweroff"); +MODULE_LICENSE("GPL");