[PATCH v16 07/14] firmware: psci: Implement vendor-specific resets as reboot-mode

[Pavan Kondeti]

On Wed, Oct 15, 2025 at 10:08:22AM +0530, Shivendra Pratap wrote:
> +static int __init psci_init_vendor_reset(void)
> +{
> +	struct reboot_mode_driver *reboot;
> +	struct device_node *psci_np;
> +	struct device_node *np;
> +	int ret;
> +
> +	if (!psci_system_reset2_supported)
> +		return -EINVAL;
> +
> +	psci_np = of_find_compatible_node(NULL, NULL, "arm,psci-1.0");
> +	if (!psci_np)
> +		return -ENODEV;
> +
> +	np = of_find_node_by_name(psci_np, "reboot-mode");
> +	if (!np) {
> +		of_node_put(psci_np);
> +		return -ENODEV;
> +	}
> +
> +	ret = atomic_notifier_chain_register(&panic_notifier_list, &psci_panic_block);
> +	if (ret)
> +		goto err_notifier;
> +
> +	reboot = kzalloc(sizeof(*reboot), GFP_KERNEL);
> +	if (!reboot) {
> +		ret = -ENOMEM;
> +		goto err_kzalloc;
> +	}
> +
> +	reboot->write = psci_set_vendor_sys_reset2;
> +	reboot->driver_name = "psci";
> +
> +	ret = reboot_mode_register(reboot, of_fwnode_handle(np));
> +	if (ret)
> +		goto err_register;
> +

minor nit: np and psci_np reference must be dropped since we are done
using it.

> +	return 0;
> +
> +err_register:
> +	kfree(reboot);
> +err_kzalloc:
> +	atomic_notifier_chain_unregister(&panic_notifier_list, &psci_panic_block);
> +err_notifier:
> +	of_node_put(psci_np);
> +	of_node_put(np);
> +	return ret;
> +}
> +late_initcall(psci_init_vendor_reset)
> +
>  static void __init psci_init_system_reset2(void)
>  {
>  	int ret;
>