On 16:19-20240131, Andrew Davis wrote: > 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 <afd@xxxxxx> > --- > 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 <afd@xxxxxx> > + */ > + > +#include <linux/mod_devicetable.h> > +#include <linux/module.h> > +#include <linux/platform_device.h> > +#include <linux/reboot.h> > + > +#include <linux/soc/ti/ti_sci_protocol.h> > + > +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 <afd@xxxxxx>"); > +MODULE_DESCRIPTION("TI System Control Interface (TI SCI) Reboot driver"); > +MODULE_LICENSE("GPL"); > -- > 2.39.2 Will assume the patch to go via Sebastien. Will be good for the dts to go via SoC tree. So hoping Sebastien will just pick the driver and bindings. Reviewed-by: Nishanth Menon <nm@xxxxxx> -- Regards, Nishanth Menon Key (0xDDB5849D1736249D) / Fingerprint: F8A2 8693 54EB 8232 17A3 1A34 DDB5 849D 1736 249D
