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authorRob Herring <rob.herring@calxeda.com>2013-02-27 02:05:46 +0400
committerRob Herring <rob.herring@calxeda.com>2013-10-02 01:30:56 +0400
commita410146c3ea5cf82a52f00814c0a4142ea9768ba (patch)
treebf7fdb253aa478f472fba2b43489e8fbb40209e9 /drivers/cpuidle
parent60a66e370007e8535b7a561353b07b37deaf35ba (diff)
downloadlinux-a410146c3ea5cf82a52f00814c0a4142ea9768ba.tar.xz
cpuidle: calxeda: add support to use PSCI calls
This updates the Calxeda cpuidle driver to use PSCI calls to powergate cores. This also enables cpuidle for the ECX-2000. This could possibly become a generic PSCI driver, but there are no other PSCI users in the kernel other than mach-virt. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: linux-pm@vger.kernel.org
Diffstat (limited to 'drivers/cpuidle')
-rw-r--r--drivers/cpuidle/Kconfig.arm2
-rw-r--r--drivers/cpuidle/cpuidle-calxeda.c39
2 files changed, 7 insertions, 34 deletions
diff --git a/drivers/cpuidle/Kconfig.arm b/drivers/cpuidle/Kconfig.arm
index 8e3660322308..d6f57d5d9631 100644
--- a/drivers/cpuidle/Kconfig.arm
+++ b/drivers/cpuidle/Kconfig.arm
@@ -4,7 +4,7 @@
config ARM_HIGHBANK_CPUIDLE
bool "CPU Idle Driver for Calxeda processors"
- depends on ARCH_HIGHBANK
+ depends on ARM_PSCI
select ARM_CPU_SUSPEND
help
Select this to enable cpuidle on Calxeda processors.
diff --git a/drivers/cpuidle/cpuidle-calxeda.c b/drivers/cpuidle/cpuidle-calxeda.c
index 6d49527d4a0c..36795639df0d 100644
--- a/drivers/cpuidle/cpuidle-calxeda.c
+++ b/drivers/cpuidle/cpuidle-calxeda.c
@@ -23,44 +23,18 @@
#include <linux/cpuidle.h>
#include <linux/cpu_pm.h>
#include <linux/init.h>
-#include <linux/io.h>
-#include <linux/time.h>
-#include <linux/delay.h>
-#include <linux/suspend.h>
+#include <linux/mm.h>
#include <linux/platform_device.h>
#include <asm/cpuidle.h>
-#include <asm/proc-fns.h>
-#include <asm/smp_scu.h>
#include <asm/suspend.h>
-#include <asm/cacheflush.h>
-#include <asm/cp15.h>
-
-extern void highbank_set_cpu_jump(int cpu, void *jump_addr);
-extern void __iomem *scu_base_addr;
-
-static noinline void calxeda_idle_restore(void)
-{
- set_cr(get_cr() | CR_C);
- set_auxcr(get_auxcr() | 0x40);
- scu_power_mode(scu_base_addr, SCU_PM_NORMAL);
-}
+#include <asm/psci.h>
static int calxeda_idle_finish(unsigned long val)
{
- /* Already flushed cache, but do it again as the outer cache functions
- * dirty the cache with spinlocks */
- flush_cache_all();
-
- set_auxcr(get_auxcr() & ~0x40);
- set_cr(get_cr() & ~CR_C);
-
- scu_power_mode(scu_base_addr, SCU_PM_DORMANT);
-
- cpu_do_idle();
-
- /* Restore things if we didn't enter power-gating */
- calxeda_idle_restore();
- return 1;
+ const struct psci_power_state ps = {
+ .type = PSCI_POWER_STATE_TYPE_POWER_DOWN,
+ };
+ return psci_ops.cpu_suspend(ps, __pa(cpu_resume));
}
static int calxeda_pwrdown_idle(struct cpuidle_device *dev,
@@ -68,7 +42,6 @@ static int calxeda_pwrdown_idle(struct cpuidle_device *dev,
int index)
{
cpu_pm_enter();
- highbank_set_cpu_jump(smp_processor_id(), cpu_resume);
cpu_suspend(0, calxeda_idle_finish);
cpu_pm_exit();