diff options
Diffstat (limited to 'drivers/power/reset')
| -rw-r--r-- | drivers/power/reset/Kconfig | 7 | ||||
| -rw-r--r-- | drivers/power/reset/Makefile | 1 | ||||
| -rw-r--r-- | drivers/power/reset/th1520-aon-reboot.c | 98 |
3 files changed, 106 insertions, 0 deletions
diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig index 77ea3129c708..8248895ca903 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. +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 b7c2b5940be9..51da87e05ce7 100644 --- a/drivers/power/reset/Makefile +++ b/drivers/power/reset/Makefile @@ -25,6 +25,7 @@ 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-$(CONFIG_POWER_RESET_TH1520_AON) += th1520-aon-reboot.o obj-$(CONFIG_POWER_RESET_TORADEX_EC) += tdx-ec-poweroff.o obj-$(CONFIG_POWER_RESET_TPS65086) += tps65086-restart.o obj-$(CONFIG_POWER_RESET_VERSATILE) += 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 000000000000..ec249667a0ff --- /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 <uwu@icenowy.me> + */ + +#include <linux/auxiliary_bus.h> +#include <linux/firmware/thead/thead,th1520-aon.h> +#include <linux/module.h> +#include <linux/notifier.h> +#include <linux/of.h> +#include <linux/reboot.h> +#include <linux/slab.h> + +#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 = data->cb_data; + struct th1520_aon_msg_empty_body msg = {}; + + msg.hdr.svc = TH1520_AON_RPC_SVC_WDG; + msg.hdr.func = TH1520_AON_WDG_FUNC_POWER_OFF; + msg.hdr.size = 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 = data->cb_data; + struct th1520_aon_msg_empty_body msg = {}; + + msg.hdr.svc = TH1520_AON_RPC_SVC_WDG; + msg.hdr.func = TH1520_AON_WDG_FUNC_RESTART; + msg.hdr.size = 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 = &adev->dev; + int ret; + + /* Expect struct th1520_aon_chan to be passed via platform_data */ + ret = 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 = 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[] = { + { .name = "th1520_pm_domains.reboot" }, + {}, +}; +MODULE_DEVICE_TABLE(auxiliary, th1520_aon_reboot_id_table); + +static struct auxiliary_driver th1520_aon_reboot_driver = { + .driver = { + .name = "th1520-aon-reboot", + }, + .probe = th1520_aon_reboot_probe, + .id_table = th1520_aon_reboot_id_table, +}; +module_auxiliary_driver(th1520_aon_reboot_driver); + +MODULE_AUTHOR("Icenowy Zheng <uwu@icenowy.me>"); +MODULE_DESCRIPTION("T-HEAD TH1520 AON-firmware-based reboot driver"); +MODULE_LICENSE("GPL"); |