From nobody Sat Oct 4 12:47:32 2025 Received: from sender4-op-o15.zoho.com (sender4-op-o15.zoho.com [136.143.188.15]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 19768286D49; Mon, 18 Aug 2025 07:49:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=pass smtp.client-ip=136.143.188.15 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755503388; cv=pass; b=BcHiurYUZ7tapa8G0W7ezu/HUdox2mLjkIdQzrwOoQTEkRVpEQ4d3+qcsI14xtM93ffES1WanVthzUqWGEYdYKG1Lz9L3IhQVmKRh7L6GpnNyCVM86pv4bSrCPjxCINxKhhnz/wnPgeJlmBrFhGe+GGuty+10xHFopPPD2mxChU= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755503388; c=relaxed/simple; bh=ACf4r7Qngk3dd9Er6SsBBuKCjXlRI22RwQgN2pXOl/w=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=SZLE8UVfkB6MzQKKfe7dIns0IfbRbtUm2nPxbXb/Sodwqx9t3qLb0OgKbvmPsRjRgJqpSYGQkY+RSdthiCsUxAmWqjPjOmjyGyMacanRN8KYRd7B5HbyQjh7yTDIQjsy5ugmE61jNQkqtgbgEvSIOXeYewEpcH29rvmD0J27M38= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=icenowy.me; spf=pass smtp.mailfrom=icenowy.me; dkim=pass (2048-bit key) header.d=icenowy.me header.i=uwu@icenowy.me header.b=k4Qhiueg; arc=pass smtp.client-ip=136.143.188.15 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=icenowy.me Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=icenowy.me Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=icenowy.me header.i=uwu@icenowy.me header.b="k4Qhiueg" ARC-Seal: i=1; a=rsa-sha256; t=1755503374; cv=none; d=zohomail.com; s=zohoarc; b=X032uvCgpoQTIviV7My3PYMDvdbfmyxrOehYKxeioFUO7KQ/aZ9abRKNasky+b3SBtd1JKRNa+cdcMJSp1q5qlDc5qKOHYXzR/q8rpSJp1UwvuEXhq3Jct+Lh+n7lnCJ1CdQnaLLaekOGWX0BV3ZdNCplX1W5ZS7CUonTyBSkzA= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1755503374; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:MIME-Version:Message-ID:References:Subject:Subject:To:To:Message-Id:Reply-To; bh=UedmDzyvf5l65qW+hQfIQJ8Xd28PzjRNYITRMIOAHbE=; b=JUc8L0gaccDunSIVZUel4Z+xTSGE8NXgu0rzLkQ47kRSkGyjopGsGFAcD+LHE3vq9cIVm0ZNnCdlYgCda/iq68E+sYVUnsIRISFVbxT3UbSkbgXx60/Fjzup8pQQU5SxtwOwgDpRmJG9qzHdOqyQxPGmFWA2T7RT/iFL28GCOEg= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=icenowy.me; spf=pass smtp.mailfrom=uwu@icenowy.me; dmarc=pass header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1755503374; s=zmail2; d=icenowy.me; i=uwu@icenowy.me; h=From:From:To:To:Cc:Cc:Subject:Subject:Date:Date:Message-ID:In-Reply-To:References:MIME-Version:Content-Transfer-Encoding:Message-Id:Reply-To; bh=UedmDzyvf5l65qW+hQfIQJ8Xd28PzjRNYITRMIOAHbE=; b=k4QhiuegKR1KjzI+AbcmK5swtDTs1eGRuKJoq3iZ5yDsNG4iKCTXgL+Z4oJGEJwb qQ3wdnShysWsdzhtBbwkMepF1oYABlAghFQuEu1Rlv74wxIy+rYxfKAN8LHvvi5fBOx F1kdoH98xdny8jzJ1AfoOEyDMFRO+Ravl5MHwRM8VTzgXmEsZvZ5b4kbiIDFzIYo/kn a3bHknIG+nZNgSoRKvTthRaAPSW6ZgfviDjESAjHiievc5yzHatbE54H9PPPD2D+JsL 7YLJh0EO+PiRbHngtbdDaHyILXJyARQKubyyrXmy2LZBVhbhQK7tblA4VBhfoV3mRzl 2ueR0TLUfQ== Received: by mx.zohomail.com with SMTPS id 1755503371096963.652409830932; Mon, 18 Aug 2025 00:49:31 -0700 (PDT) From: Icenowy Zheng To: Drew Fustini , Guo Ren , Fu Wei , Michal Wilczynski , Ulf Hansson , Sebastian Reichel Cc: Han Gao , Yao Zi , linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, linux-pm@vger.kernel.org, Icenowy Zheng Subject: [PATCH 1/2] driver: reset: th1520-aon: add driver for poweroff/reboot via AON FW Date: Mon, 18 Aug 2025 15:49:05 +0800 Message-ID: <20250818074906.2907277-2-uwu@icenowy.me> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250818074906.2907277-1-uwu@icenowy.me> References: <20250818074906.2907277-1-uwu@icenowy.me> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZohoMailClient: External Content-Type: text/plain; charset="utf-8" This driver implements poweroff/reboot support for T-Head TH1520 SoCs running the AON firmware by sending a message to the AON firmware's WDG part. This is a auxiliary device driver, and expects the AON channel to be passed via the platform_data of the auxiliary device. Signed-off-by: Icenowy Zheng Acked-by: Sebastian Reichel --- MAINTAINERS | 1 + drivers/power/reset/Kconfig | 7 ++ drivers/power/reset/Makefile | 1 + drivers/power/reset/th1520-aon-reboot.c | 98 +++++++++++++++++++++++++ 4 files changed, 107 insertions(+) create mode 100644 drivers/power/reset/th1520-aon-reboot.c diff --git a/MAINTAINERS b/MAINTAINERS index daf520a13bdf6..e138a1e96ceea 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -21730,6 +21730,7 @@ F: drivers/mailbox/mailbox-th1520.c F: drivers/net/ethernet/stmicro/stmmac/dwmac-thead.c F: drivers/pinctrl/pinctrl-th1520.c F: drivers/pmdomain/thead/ +F: drivers/power/reset/th1520-aon-reboot.c F: drivers/power/sequencing/pwrseq-thead-gpu.c F: drivers/reset/reset-th1520.c F: include/dt-bindings/clock/thead,th1520-clk-ap.h diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig index 77ea3129c7080..8248895ca9038 100644 --- a/drivers/power/reset/Kconfig +++ b/drivers/power/reset/Kconfig @@ -225,6 +225,13 @@ config POWER_RESET_ST help Reset support for STMicroelectronics boards. =20 +config POWER_RESET_TH1520_AON + tristate "T-Head TH1520 AON firmware poweroff and reset driver" + depends on TH1520_PM_DOMAINS + help + This driver supports power-off and reset operations for T-Head + TH1520 SoCs running the AON firmware. + config POWER_RESET_TORADEX_EC tristate "Toradex Embedded Controller power-off and reset driver" depends on ARCH_MXC || COMPILE_TEST diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile index b7c2b5940be99..51da87e05ce76 100644 --- a/drivers/power/reset/Makefile +++ b/drivers/power/reset/Makefile @@ -25,6 +25,7 @@ obj-$(CONFIG_POWER_RESET_QNAP) +=3D qnap-poweroff.o obj-$(CONFIG_POWER_RESET_REGULATOR) +=3D regulator-poweroff.o obj-$(CONFIG_POWER_RESET_RESTART) +=3D restart-poweroff.o obj-$(CONFIG_POWER_RESET_ST) +=3D st-poweroff.o +obj-$(CONFIG_POWER_RESET_TH1520_AON) +=3D th1520-aon-reboot.o obj-$(CONFIG_POWER_RESET_TORADEX_EC) +=3D tdx-ec-poweroff.o obj-$(CONFIG_POWER_RESET_TPS65086) +=3D tps65086-restart.o obj-$(CONFIG_POWER_RESET_VERSATILE) +=3D arm-versatile-reboot.o diff --git a/drivers/power/reset/th1520-aon-reboot.c b/drivers/power/reset/= th1520-aon-reboot.c new file mode 100644 index 0000000000000..8256c1703ebe8 --- /dev/null +++ b/drivers/power/reset/th1520-aon-reboot.c @@ -0,0 +1,98 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * T-HEAD TH1520 AON Firmware Reboot Driver + * + * Copyright (c) 2025 Icenowy Zheng + */ + +#include +#include +#include +#include +#include +#include +#include + +#define TH1520_AON_REBOOT_PRIORITY 200 + +struct th1520_aon_msg_empty_body { + struct th1520_aon_rpc_msg_hdr hdr; + u16 reserved[12]; +} __packed __aligned(1); + +static int th1520_aon_pwroff_handler(struct sys_off_data *data) +{ + struct th1520_aon_chan *aon_chan =3D data->cb_data; + struct th1520_aon_msg_empty_body msg =3D {}; + + msg.hdr.svc =3D TH1520_AON_RPC_SVC_WDG; + msg.hdr.func =3D TH1520_AON_WDG_FUNC_POWER_OFF; + msg.hdr.size =3D TH1520_AON_RPC_MSG_NUM; + + th1520_aon_call_rpc(aon_chan, &msg); + + return NOTIFY_DONE; +} + +static int th1520_aon_restart_handler(struct sys_off_data *data) +{ + struct th1520_aon_chan *aon_chan =3D data->cb_data; + struct th1520_aon_msg_empty_body msg =3D {}; + + msg.hdr.svc =3D TH1520_AON_RPC_SVC_WDG; + msg.hdr.func =3D TH1520_AON_WDG_FUNC_RESTART; + msg.hdr.size =3D TH1520_AON_RPC_MSG_NUM; + + th1520_aon_call_rpc(aon_chan, &msg); + + return NOTIFY_DONE; +} + +static int th1520_aon_reboot_probe(struct auxiliary_device *adev, + const struct auxiliary_device_id *id) +{ + struct device *dev =3D &adev->dev; + int ret; + + /* Expect struct th1520_aon_chan to be passed via platform_data */ + ret =3D devm_register_sys_off_handler(dev, SYS_OFF_MODE_POWER_OFF, + TH1520_AON_REBOOT_PRIORITY, + th1520_aon_pwroff_handler, + adev->dev.platform_data); + + if (ret) { + dev_err(dev, "Failed to register power off handler\n"); + return ret; + } + + ret =3D devm_register_sys_off_handler(dev, SYS_OFF_MODE_RESTART, + TH1520_AON_REBOOT_PRIORITY, + th1520_aon_restart_handler, + adev->dev.platform_data); + + if (ret) { + dev_err(dev, "Failed to register restart handler\n"); + return ret; + } + + return 0; +} + +static const struct auxiliary_device_id th1520_aon_reboot_id_table[] =3D { + { .name =3D "th1520_pm_domains.reboot" }, + {}, +}; +MODULE_DEVICE_TABLE(auxiliary, th1520_aon_reboot_id_table); + +static struct auxiliary_driver th1520_aon_reboot_driver =3D { + .driver =3D { + .name =3D "th1520-aon-reboot", + }, + .probe =3D th1520_aon_reboot_probe, + .id_table =3D th1520_aon_reboot_id_table, +}; +module_auxiliary_driver(th1520_aon_reboot_driver); + +MODULE_AUTHOR("Icenowy Zheng "); +MODULE_DESCRIPTION("T-HEAD TH1520 AON-firmware-based reboot driver"); +MODULE_LICENSE("GPL"); --=20 2.50.1