diff --git a/Documentation/devicetree/bindings/arm/cpus.txt b/Documentation/devicetree/bindings/arm/cpus.txt index a1bcfeed5f24..3c2fd72d0bf9 100644 --- a/Documentation/devicetree/bindings/arm/cpus.txt +++ b/Documentation/devicetree/bindings/arm/cpus.txt @@ -202,6 +202,7 @@ nodes to be present and contain the properties described below. "marvell,armada-380-smp" "marvell,armada-390-smp" "marvell,armada-xp-smp" + "marvell,98dx3236-smp" "mediatek,mt6589-smp" "mediatek,mt81xx-tz-smp" "qcom,gcc-msm8660" diff --git a/Documentation/devicetree/bindings/arm/marvell/98dx3236-resume-ctrl.txt b/Documentation/devicetree/bindings/arm/marvell/98dx3236-resume-ctrl.txt new file mode 100644 index 000000000000..26eb9d3aa630 --- /dev/null +++ b/Documentation/devicetree/bindings/arm/marvell/98dx3236-resume-ctrl.txt @@ -0,0 +1,16 @@ +Resume Control +-------------- +Available on Marvell SOCs: 98DX3336 and 98DX4251 + +Required properties: + +- compatible: must be "marvell,98dx3336-resume-ctrl" + +- reg: Should contain resume control registers location and length + +Example: + +resume@20980 { + compatible = "marvell,98dx3336-resume-ctrl"; + reg = <0x20980 0x10>; +}; diff --git a/arch/arm/mach-mvebu/platsmp.c b/arch/arm/mach-mvebu/platsmp.c index 46c742d3bd41..e62273aacb43 100644 --- a/arch/arm/mach-mvebu/platsmp.c +++ b/arch/arm/mach-mvebu/platsmp.c @@ -184,3 +184,78 @@ const struct smp_operations armada_xp_smp_ops __initconst = { CPU_METHOD_OF_DECLARE(armada_xp_smp, "marvell,armada-xp-smp", &armada_xp_smp_ops); + +#define MV98DX3236_CPU_RESUME_CTRL_REG 0x08 +#define MV98DX3236_CPU_RESUME_ADDR_REG 0x04 + +static const struct of_device_id of_mv98dx3236_resume_table[] = { + { + .compatible = "marvell,98dx3336-resume-ctrl", + }, + { /* end of list */ }, +}; + +static int mv98dx3236_resume_set_cpu_boot_addr(int hw_cpu, void *boot_addr) +{ + struct device_node *np; + void __iomem *base; + WARN_ON(hw_cpu != 1); + + np = of_find_matching_node(NULL, of_mv98dx3236_resume_table); + if (!np) + return -ENODEV; + + base = of_io_request_and_map(np, 0, of_node_full_name(np)); + of_node_put(np); + if (IS_ERR(base)) + return PTR_ERR(base); + + writel(0, base + MV98DX3236_CPU_RESUME_CTRL_REG); + writel(virt_to_phys(boot_addr), base + MV98DX3236_CPU_RESUME_ADDR_REG); + + iounmap(base); + + return 0; +} + +static int mv98dx3236_boot_secondary(unsigned int cpu, struct task_struct *idle) +{ + int ret, hw_cpu; + + hw_cpu = cpu_logical_map(cpu); + set_secondary_cpu_clock(hw_cpu); + mv98dx3236_resume_set_cpu_boot_addr(hw_cpu, + armada_xp_secondary_startup); + + /* + * This is needed to wake up CPUs in the offline state after + * using CPU hotplug. + */ + arch_send_wakeup_ipi_mask(cpumask_of(cpu)); + + /* + * This is needed to take secondary CPUs out of reset on the + * initial boot. + */ + ret = mvebu_cpu_reset_deassert(hw_cpu); + if (ret) { + pr_warn("unable to boot CPU: %d\n", ret); + return ret; + } + + return 0; +} + +static const struct smp_operations mv98dx3236_smp_ops __initconst = { + .smp_init_cpus = armada_xp_smp_init_cpus, + .smp_prepare_cpus = armada_xp_smp_prepare_cpus, + .smp_boot_secondary = mv98dx3236_boot_secondary, + .smp_secondary_init = armada_xp_secondary_init, +#ifdef CONFIG_HOTPLUG_CPU + .cpu_die = armada_xp_cpu_die, + .cpu_kill = armada_xp_cpu_kill, +#endif +}; + +CPU_METHOD_OF_DECLARE(mv98dx3236_smp, "marvell,98dx3236-smp", + &mv98dx3236_smp_ops);