[PATCH v4 15/15] ARM: vexpress: Select multi-cluster SMP operation if required

[Olof Johansson]

On Tue, Feb 05, 2013 at 12:22:12AM -0500, Nicolas Pitre wrote:
> From: Jon Medhurst <tixy at linaro.org>
> 
> Signed-off-by: Jon Medhurst <tixy at linaro.org>
> Signed-off-by: Nicolas Pitre <nicolas.pitre at linaro.org>
> Reviewed-by: Santosh Shilimkar <santosh.shilimkar at ti.com>
> ---
>  arch/arm/mach-vexpress/core.h    |  2 ++
>  arch/arm/mach-vexpress/platsmp.c | 12 ++++++++++++
>  arch/arm/mach-vexpress/v2m.c     |  2 +-
>  3 files changed, 15 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm/mach-vexpress/core.h b/arch/arm/mach-vexpress/core.h
> index f134cd4a85..3a761fd76c 100644
> --- a/arch/arm/mach-vexpress/core.h
> +++ b/arch/arm/mach-vexpress/core.h
> @@ -6,6 +6,8 @@
>  
>  void vexpress_dt_smp_map_io(void);
>  
> +void vexpress_smp_init_ops(void);
> +
>  extern struct smp_operations	vexpress_smp_ops;
>  
>  extern void vexpress_cpu_die(unsigned int cpu);
> diff --git a/arch/arm/mach-vexpress/platsmp.c b/arch/arm/mach-vexpress/platsmp.c
> index c5d70de9bb..667344b479 100644
> --- a/arch/arm/mach-vexpress/platsmp.c
> +++ b/arch/arm/mach-vexpress/platsmp.c
> @@ -12,6 +12,7 @@
>  #include <linux/errno.h>
>  #include <linux/smp.h>
>  #include <linux/io.h>
> +#include <linux/of.h>
>  #include <linux/of_fdt.h>
>  #include <linux/vexpress.h>
>  
> @@ -206,3 +207,14 @@ struct smp_operations __initdata vexpress_smp_ops = {
>  	.cpu_die		= vexpress_cpu_die,
>  #endif
>  };
> +
> +void __init vexpress_smp_init_ops(void)
> +{
> +	struct smp_operations *ops = &vexpress_smp_ops;
> +#ifdef CONFIG_CLUSTER_PM
> +	extern struct smp_operations mcpm_smp_ops;

Seems appropriate to put this prototype in a header file instead.

> +	if(of_find_compatible_node(NULL, NULL, "arm,cci"))

Another checkpatch error on if() whitespace.

Also, while bindings haven't been ironed out, checking for whether the
node/device is enabled or disabled could be appropriate here?

> +		ops = &mcpm_smp_ops;
> +#endif
> +	smp_set_ops(ops);
> +}
> diff --git a/arch/arm/mach-vexpress/v2m.c b/arch/arm/mach-vexpress/v2m.c
> index 011661a6c5..34172bd504 100644
> --- a/arch/arm/mach-vexpress/v2m.c
> +++ b/arch/arm/mach-vexpress/v2m.c
> @@ -494,7 +494,7 @@ static const char * const v2m_dt_match[] __initconst = {
>  
>  DT_MACHINE_START(VEXPRESS_DT, "ARM-Versatile Express")
>  	.dt_compat	= v2m_dt_match,
> -	.smp		= smp_ops(vexpress_smp_ops),
> +	.smp_init	= smp_init_ops(vexpress_smp_init_ops),
>  	.map_io		= v2m_dt_map_io,
>  	.init_early	= v2m_dt_init_early,
>  	.init_irq	= v2m_dt_init_irq,


-Olof