MIPS: smp-cps: function to determine whether CPS SMP is in use

The core power down state for cpuidle will require that the CPS SMP
implementation is in use. This patch provides a mips_cps_smp_in_use
function which determines whether or not the CPS SMP implementation is
currently in use.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>

2 files changed, 8 insertions, 0 deletions

diff --git a/arch/mips/include/asm/smp-cps.h b/arch/mips/include/asm/smp-cps.h
index d49279e92eb5..324df2c835ac 100644
--- a/arch/mips/include/asm/smp-cps.h
+++ b/arch/mips/include/asm/smp-cps.h
@@ -31,6 +31,8 @@ extern void mips_cps_core_init(void);
 
 extern struct vpe_boot_config *mips_cps_boot_vpes(void);
 
+extern bool mips_cps_smp_in_use(void);
+
 #else /* __ASSEMBLY__ */
 
 .extern mips_cps_bootcfg;
diff --git a/arch/mips/kernel/smp-cps.c b/arch/mips/kernel/smp-cps.c
index af90e82f94bf..c7879fbe9f5b 100644
--- a/arch/mips/kernel/smp-cps.c
+++ b/arch/mips/kernel/smp-cps.c
@@ -260,6 +260,12 @@ static struct plat_smp_ops cps_smp_ops = {
         .cpus_done              = cps_cpus_done,
 };
 
+bool mips_cps_smp_in_use(void)
+{
+        extern struct plat_smp_ops *mp_ops;
+        return mp_ops == &cps_smp_ops;
+}
+
 int register_cps_smp_ops(void)
 {
         if (!mips_cm_present()) {