From: Magnus Damm <damm+renesas@xxxxxxxxxxxxx>
Add a function to check if other DT based method is available, and
if so return false to not hook up smp_ops from the machine vector.
This results in that DT-based SMP support has priority over older
C-based smp_ops code, and in case DT-based SMP support code does not
exist in the DTB then the old smp_ops code will still work as-is.
Signed-off-by: Magnus Damm <damm+renesas@xxxxxxxxxxxxx>
---
Changes since V2:
- None
Changes since V1:
- Reworked r8a7791-specific version to become reusable function.
arch/arm/mach-shmobile/common.h | 1 +
arch/arm/mach-shmobile/platsmp.c | 7 +++++++
2 files changed, 8 insertions(+)
--- 0001/arch/arm/mach-shmobile/common.h
+++ work/arch/arm/mach-shmobile/common.h 2015-08-23 15:26:18.722366518 +0900
@@ -11,6 +11,7 @@ extern void shmobile_smp_sleep(void);
extern void shmobile_smp_hook(unsigned int cpu, unsigned long fn,
unsigned long arg);
extern bool shmobile_smp_cpu_can_disable(unsigned int cpu);
+extern bool shmobile_smp_init_fallback_ops(void);
extern void shmobile_boot_scu(void);
extern void shmobile_smp_scu_prepare_cpus(unsigned int max_cpus);
extern void shmobile_smp_scu_cpu_die(unsigned int cpu);
--- 0001/arch/arm/mach-shmobile/platsmp.c
+++ work/arch/arm/mach-shmobile/platsmp.c 2015-08-23 15:26:13.692366518 +0900
@@ -36,3 +36,10 @@ bool shmobile_smp_cpu_can_disable(unsign
return true; /* Hotplug of any CPU is supported */
}
#endif
+
+bool __init shmobile_smp_init_fallback_ops(void)
+{
+ /* fallback on PSCI/smp_ops if no other DT based method is detected */
+ return platform_can_secondary_boot() ? true : false;
+}
+
--
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