From nobody Thu Oct 2 10:55:49 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 EB8F2319601; Thu, 18 Sep 2025 17:34:03 +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=1758216846; cv=pass; b=FZ2e+SazMOTMynwrGtpXv9s1UnXil9VxRmSjdVy138G4b+OuZI37vFQIYUHVHeblnZbzfMZXVCSmdjmIRiO+5HwXcTUpvsSA7OsjDBf27wJpsSqUb16CoN4QWfNvKWqAFYvzJjg87IX5yv1I27rRrUMiA6Lz9y0+HatthgpSQrk= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758216846; c=relaxed/simple; bh=/+8jkfQ4KBN4fxaL3atGnZP9oPlYA5j5pCPdhpXPMPs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=W8I8xs7bKxESwzUBOz3YJ4wU5/bNxCTlZLiYFXlVj8QGjGXHXZsmaACV8x+A41bIwUQlQK++H3NWLHb9V1wZsaVZbmzv4Ze+Kh6p7ly31Odt10RMWqKGnsG8fZfrlAXiaWvzI4oFOLXHRc1ROywl9A6Ypi6WiV/llVI5GRkTwJk= 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=U5I9zyl6; 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="U5I9zyl6" ARC-Seal: i=1; a=rsa-sha256; t=1758216828; cv=none; d=zohomail.com; s=zohoarc; b=kSods2vewC8Mcjemi3n5aZxmiFB3zLrOtC1xmFmctnyt/E/hnhxK3lVy/7PQDJkTF975w24i3HKeqJC9lTk9owxYH7InIpEfiWZfNNs+XWU4e5D6EU68UNzO0aZMgiaVLGkWLtFvf+752hi15eEs35x82UqYycXedyrq9miimro= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1758216828; 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=dIOj/wQCu+bG4GzEt4OQqSjsMqHBTnI0OcYbetMjGYU=; b=Fg1l/VL/A5u+l1H/Ol3XZ2fD2/DvDOeolS+qiNZhBQ/CeGD5jsdpptSgdvikTe9CVga8MgVUwXS2OP1/ogzN9HVv4hQiMlkOj9/rrkTUi4u4sgQI/FUAG4F6p7Vd0LTLxjxAHuCrI15GeXHzNEOxon0kTA3cCxsC/woIir9yGM8= 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=1758216828; 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=dIOj/wQCu+bG4GzEt4OQqSjsMqHBTnI0OcYbetMjGYU=; b=U5I9zyl6pdPTi62QEhUL06zgXywEdwfgOeuJFRnUVDfXcQ6gcM2CWhziSmXwrz5L E/FTWsky22uP+QXnslO1voodsv+X3H7FSGyfKcIuHANUw7T5cROGy28+OvqeHWGX1q+ t9Ewnxjn8fFhtPmcBkQvB7r88ngo43ROwW+qOWRr82u4SGCOxUU7fBmnBd0M8aWcSep MjG09WcSK45qYlNxE/l51MTvC7tD7G97tGhK6Olm/hYT5fv6ZDqgDB66BRFSQ/x1COb LAdRTaO5GNXFo2eBl9cDEoLOXgMwMCUxMhpEtjtAKo9UKBxpHNctn5F9J6amduKcia5 D1dNd89Jyw== Received: by mx.zohomail.com with SMTPS id 175821682656261.42412979027654; Thu, 18 Sep 2025 10:33:46 -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 , Sebastian Reichel Subject: [PATCH v2 1/2] driver: reset: th1520-aon: add driver for poweroff/reboot via AON FW Date: Fri, 19 Sep 2025 01:33:22 +0800 Message-ID: <20250918173323.340738-2-uwu@icenowy.me> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20250918173323.340738-1-uwu@icenowy.me> References: <20250918173323.340738-1-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 --- Changes in v2: - Added Sebastian's ACK. 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 f6206963efbf0..5cb0fa3792d14 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -21763,6 +21763,7 @@ 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..ec249667a0ffd --- /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 2.51.0