On 01/06, Chris Packham wrote:
> diff --git a/arch/arm/mach-mvebu/platsmp.c b/arch/arm/mach-mvebu/platsmp.c
> index 46c742d3bd41..3c9ab9a008ad 100644
> --- a/arch/arm/mach-mvebu/platsmp.c
> +++ b/arch/arm/mach-mvebu/platsmp.c
> @@ -182,5 +182,48 @@ const struct smp_operations armada_xp_smp_ops __initconst = {
> #endif
> };
>
> +static int mv98dx3236_boot_secondary(unsigned int cpu, struct task_struct *idle)
> +{
> + int ret, hw_cpu;
> +
> + pr_info("Booting CPU %d\n", cpu);
Doesn't the core already print something when bringing up CPUs?
This message seems redundant.
> +
> + 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;
> +}
> +
> +struct smp_operations mv98dx3236_smp_ops __initdata = {
static const __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(armada_xp_smp, "marvell,armada-xp-smp",
> &armada_xp_smp_ops);
> +CPU_METHOD_OF_DECLARE(mv98dx3236_smp, "marvell,98dx3236-smp",
> + &mv98dx3236_smp_ops);
> diff --git a/arch/arm/mach-mvebu/pmsu-98dx3236.c b/arch/arm/mach-mvebu/pmsu-98dx3236.c
> new file mode 100644
> index 000000000000..1052674dd439
> --- /dev/null
> +++ b/arch/arm/mach-mvebu/pmsu-98dx3236.c
> @@ -0,0 +1,52 @@
> +/**
> + * CPU resume support for 98DX3236 internal CPU (a.k.a. MSYS).
> + */
> +
> +#define pr_fmt(fmt) "mv98dx3236-resume: " fmt
> +
> +#include <linux/kernel.h>
> +#include <linux/init.h>
> +#include <linux/of_address.h>
> +#include <linux/io.h>
> +#include "common.h"
> +
> +static void __iomem *mv98dx3236_resume_base;
> +#define MV98DX3236_CPU_RESUME_CTRL_OFFSET 0x08
> +#define MV98DX3236_CPU_RESUME_ADDR_OFFSET 0x04
> +
> +static const struct of_device_id of_mv98dx3236_resume_table[] = {
> + {.compatible = "marvell,98dx3336-resume-ctrl",},
> + { /* end of list */ },
> +};
> +
> +void mv98dx3236_resume_set_cpu_boot_addr(int hw_cpu, void *boot_addr)
> +{
> + WARN_ON(hw_cpu != 1);
> +
> + writel(0, mv98dx3236_resume_base + MV98DX3236_CPU_RESUME_CTRL_OFFSET);
> + writel(virt_to_phys(boot_addr), mv98dx3236_resume_base +
> + MV98DX3236_CPU_RESUME_ADDR_OFFSET);
> +}
> +
> +static int __init mv98dx3236_resume_init(void)
> +{
> + struct device_node *np;
> + void __iomem *base;
> +
> + np = of_find_matching_node(NULL, of_mv98dx3236_resume_table);
> + if (!np)
> + return 0;
Is there any reason we can't just look for this node from the
smp_ops and map it if it isn't mapped yet? Seems simpler than a
whole new file and initcall.
> +
> + base = of_io_request_and_map(np, 0, of_node_full_name(np));
> + if (IS_ERR(base)) {
> + pr_err("unable to map registers\n");
Doesn't of_io_request_and_map() spit out an error on failure
already?
> + of_node_put(np);
This could be done before the if statement and then the duplicate
statement deleted.
> + return PTR_ERR(mv98dx3236_resume_base);
Should be PTR_ERR(base)?
> + }
> +
> + mv98dx3236_resume_base = base;
> + of_node_put(np);
> + return 0;
> +}
--
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