1 // SPDX-License-Identifier: GPL-2.0-only
3  * linux/arch/arm/mach-axxia/platsmp.c
15 /* Syscon register offsets for releasing cores from reset */
31 static int axxia_boot_secondary(unsigned int cpu, struct task_struct *idle)  in axxia_boot_secondary()  argument
34 	void __iomem *syscon;  in axxia_boot_secondary()  local
37 	syscon_np = of_find_compatible_node(NULL, NULL, "lsi,axxia-syscon");  in axxia_boot_secondary()
39 		return -ENOENT;  in axxia_boot_secondary()
41 	syscon = of_iomap(syscon_np, 0);  in axxia_boot_secondary()
43 	if (!syscon)  in axxia_boot_secondary()
44 		return -ENOMEM;  in axxia_boot_secondary()
46 	tmp = readl(syscon + SC_RST_CPU_HOLD);  in axxia_boot_secondary()
47 	writel(0xab, syscon + SC_CRIT_WRITE_KEY);  in axxia_boot_secondary()
48 	tmp &= ~(1 << cpu);  in axxia_boot_secondary()
49 	writel(tmp, syscon + SC_RST_CPU_HOLD);  in axxia_boot_secondary()
57 	int cpu;  in axxia_smp_prepare_cpus()  local
63 	for_each_possible_cpu(cpu) {  in axxia_smp_prepare_cpus()
67 		np = of_get_cpu_node(cpu, NULL);  in axxia_smp_prepare_cpus()
70 		if (of_property_read_u32(np, "cpu-release-addr", &release_phys))  in axxia_smp_prepare_cpus()
74 			set_cpu_present(cpu, true);  in axxia_smp_prepare_cpus()
87 CPU_METHOD_OF_DECLARE(axxia_smp, "lsi,syscon-release", &axxia_smp_ops);