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-rw-r--r--arch/arm/mach-omap2/omap-mpuss-lowpower.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/omap-mpuss-lowpower.c b/arch/arm/mach-omap2/omap-mpuss-lowpower.c
index 867fee51e42c..9c1c12b8c5e1 100644
--- a/arch/arm/mach-omap2/omap-mpuss-lowpower.c
+++ b/arch/arm/mach-omap2/omap-mpuss-lowpower.c
@@ -192,6 +192,38 @@ int omap4_enter_lowpower(unsigned int cpu, unsigned int power_state)
return 0;
}
+/**
+ * omap4_hotplug_cpu: OMAP4 CPU hotplug entry
+ * @cpu : CPU ID
+ * @power_state: CPU low power state.
+ */
+int omap4_hotplug_cpu(unsigned int cpu, unsigned int power_state)
+{
+ unsigned int cpu_state = 0;
+
+ if (omap_rev() == OMAP4430_REV_ES1_0)
+ return -ENXIO;
+
+ if (power_state == PWRDM_POWER_OFF)
+ cpu_state = 1;
+
+ clear_cpu_prev_pwrst(cpu);
+ set_cpu_next_pwrst(cpu, power_state);
+ set_cpu_wakeup_addr(cpu, virt_to_phys(omap_secondary_startup));
+ scu_pwrst_prepare(cpu, power_state);
+
+ /*
+ * CPU never retuns back if targetted power state is OFF mode.
+ * CPU ONLINE follows normal CPU ONLINE ptah via
+ * omap_secondary_startup().
+ */
+ omap4_finish_suspend(cpu_state);
+
+ set_cpu_next_pwrst(cpu, PWRDM_POWER_ON);
+ return 0;
+}
+
+
/*
* Initialise OMAP4 MPUSS
*/