From patchwork Wed Jan 31 22:19:48 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrew Davis X-Patchwork-Id: 13540038 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 496B5C47258 for ; Wed, 31 Jan 2024 22:20:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=h/XhdcJTGRz9FhnPNAfSdsKLJne0zY2nfC6fHPdUcnc=; b=GUo9WG2X/Y6NVR jqXerYZuzbUx8JpGyTPalmxFQRh7Iz6Ng7Zl+8ugfOEQm9f/s505HJURAR2qsxA47rWI66dp39PQF hDCp7Q+ChgOwGlGG1sKzphHaH/g78ZfOY4SQtuo8GN0rxJXqkfd+Ui5DakpQlt+94PfL/oWFRpNDA o9PtFy2QlPrd9EVlCvUBX5iNhQDzBMPjrMk5L5qejrTIyR9vwcroOna4PkRYY+ZxGWmve/02wbVtr /1VaTGIMtx3lfZBLwFqrAHNYCHkpkYA7T6M9WxJ7oJ/sD7A17cEn78TblWqFPqN/1//zvQl35khFo Hh9yOwV6fY/FZnHFp3yQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rVIwK-00000005g2M-2d56; Wed, 31 Jan 2024 22:20:16 +0000 Received: from lelv0142.ext.ti.com ([198.47.23.249]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1rVIw8-00000005fwR-3ZZo for linux-arm-kernel@lists.infradead.org; Wed, 31 Jan 2024 22:20:06 +0000 Received: from lelv0265.itg.ti.com ([10.180.67.224]) by lelv0142.ext.ti.com (8.15.2/8.15.2) with ESMTP id 40VMK1tM060758; Wed, 31 Jan 2024 16:20:01 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1706739601; bh=1YUSJDF+znyudL9/WwRSORWM+cm2PVwYB2DPgs0ZaYU=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=hTi6l/P5C2NPqg6vQf12o1wOyHOl6v5Jxm7TN+Qd3oaoBR2tG/W2eX748unjJtzA1 ASJEJQE6KYw+bUVBWAuDZrtlUGyIkNTyxm42ICu6wIUQS/QNbhPhvjw0XJzev86EvO BpwTFw9eA4n/ZhFBxvh12ho+mVqQDdp1aEMk68Bc= Received: from DLEE104.ent.ti.com (dlee104.ent.ti.com [157.170.170.34]) by lelv0265.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 40VMK1wi021515 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 31 Jan 2024 16:20:01 -0600 Received: from DLEE114.ent.ti.com (157.170.170.25) by DLEE104.ent.ti.com (157.170.170.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.23; Wed, 31 Jan 2024 16:20:00 -0600 Received: from lelvsmtp6.itg.ti.com (10.180.75.249) by DLEE114.ent.ti.com (157.170.170.25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.23 via Frontend Transport; Wed, 31 Jan 2024 16:20:00 -0600 Received: from lelvsmtp5.itg.ti.com ([10.249.42.149]) by lelvsmtp6.itg.ti.com (8.15.2/8.15.2) with ESMTP id 40VMJwx5102504; Wed, 31 Jan 2024 16:20:00 -0600 From: Andrew Davis To: Nishanth Menon , Tero Kristo , Santosh Shilimkar , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Sebastian Reichel , Vignesh Raghavendra CC: , , , , Andrew Davis Subject: [PATCH 03/12] power: reset: Add TI-SCI reboot driver Date: Wed, 31 Jan 2024 16:19:48 -0600 Message-ID: <20240131221957.213717-4-afd@ti.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240131221957.213717-1-afd@ti.com> References: <20240131221957.213717-1-afd@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240131_142005_004407_07FABC8C X-CRM114-Status: GOOD ( 21.19 ) 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 reboot driver calls into firmware using TI-SCI to reboot the system. We register the handler with low priority as we want PSCI to remain the main way these devices are rebooted. This driver acts as a fallback if PSCI is not able to reboot the system. Signed-off-by: Andrew Davis Reviewed-by: Nishanth Menon --- MAINTAINERS | 1 + drivers/power/reset/Kconfig | 7 ++++ drivers/power/reset/Makefile | 1 + drivers/power/reset/ti-sci-reboot.c | 63 +++++++++++++++++++++++++++++ 4 files changed, 72 insertions(+) create mode 100644 drivers/power/reset/ti-sci-reboot.c diff --git a/MAINTAINERS b/MAINTAINERS index 45983bb174fe4..ee67ea497fc56 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -21758,6 +21758,7 @@ F: drivers/clk/keystone/sci-clk.c F: drivers/firmware/ti_sci* F: drivers/irqchip/irq-ti-sci-inta.c F: drivers/irqchip/irq-ti-sci-intr.c +F: drivers/power/reset/ti-sci-reboot.c F: drivers/reset/reset-ti-sci.c F: drivers/soc/ti/ti_sci_inta_msi.c F: drivers/pmdomain/ti/ti_sci_pm_domains.c diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig index fece990af4a75..d3e91e54cae24 100644 --- a/drivers/power/reset/Kconfig +++ b/drivers/power/reset/Kconfig @@ -205,6 +205,13 @@ config POWER_RESET_ST help Reset support for STMicroelectronics boards. +config POWER_RESET_TI_SCI + tristate "TI System Control Interface (TI-SCI) reboot driver" + depends on TI_SCI_PROTOCOL + help + This enables the reboot driver support over TI System Control + Interface available on some TI's SoCs. + config POWER_RESET_TPS65086 bool "TPS65086 restart driver" depends on MFD_TPS65086 diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile index a95d1bd275d18..881ca58a43b9c 100644 --- a/drivers/power/reset/Makefile +++ b/drivers/power/reset/Makefile @@ -23,6 +23,7 @@ obj-$(CONFIG_POWER_RESET_QNAP) += qnap-poweroff.o obj-$(CONFIG_POWER_RESET_REGULATOR) += regulator-poweroff.o obj-$(CONFIG_POWER_RESET_RESTART) += restart-poweroff.o obj-$(CONFIG_POWER_RESET_ST) += st-poweroff.o +obj-$(CONFIG_POWER_RESET_TI_SCI) += ti-sci-reboot.o obj-$(CONFIG_POWER_RESET_TPS65086) += tps65086-restart.o obj-$(CONFIG_POWER_RESET_VERSATILE) += arm-versatile-reboot.o obj-$(CONFIG_POWER_RESET_VEXPRESS) += vexpress-poweroff.o diff --git a/drivers/power/reset/ti-sci-reboot.c b/drivers/power/reset/ti-sci-reboot.c new file mode 100644 index 0000000000000..400bd5d740f8b --- /dev/null +++ b/drivers/power/reset/ti-sci-reboot.c @@ -0,0 +1,63 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Texas Instrument's System Control Interface (TI-SCI) reboot driver + * + * Copyright (C) 2024 Texas Instruments Incorporated - https://www.ti.com/ + * Andrew Davis + */ + +#include +#include +#include +#include + +#include + +static int ti_sci_reboot_handler(struct sys_off_data *data) +{ + const struct ti_sci_handle *sci = data->cb_data; + const struct ti_sci_core_ops *core_ops = &sci->ops.core_ops; + + core_ops->reboot_device(sci); + + return NOTIFY_DONE; +} + +static int ti_sci_reboot_probe(struct platform_device *pdev) +{ + const struct ti_sci_handle *sci; + int err; + + sci = devm_ti_sci_get_handle(&pdev->dev); + if (IS_ERR(sci)) + return PTR_ERR(sci); + + err = devm_register_sys_off_handler(&pdev->dev, + SYS_OFF_MODE_RESTART, + SYS_OFF_PRIO_LOW, + ti_sci_reboot_handler, + (void *)sci); + if (err) + return dev_err_probe(&pdev->dev, err, "Cannot register restart handler\n"); + + return 0; +} + +static const struct of_device_id ti_sci_reboot_of_match[] = { + { .compatible = "ti,sci-reboot", }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, ti_sci_reboot_of_match); + +static struct platform_driver ti_sci_reboot_driver = { + .probe = ti_sci_reboot_probe, + .driver = { + .name = "ti-sci-reboot", + .of_match_table = ti_sci_reboot_of_match, + }, +}; +module_platform_driver(ti_sci_reboot_driver); + +MODULE_AUTHOR("Andrew Davis "); +MODULE_DESCRIPTION("TI System Control Interface (TI SCI) Reboot driver"); +MODULE_LICENSE("GPL");