From mboxrd@z Thu Jan 1 00:00:00 1970 From: tomeu.vizoso@collabora.com (Tomeu Vizoso) Date: Wed, 8 Apr 2015 12:54:38 +0200 Subject: [PATCH] ARM: tegra: cpuidle: implement cpuidle_state.enter_freeze() Message-ID: <1428490480-10144-1-git-send-email-tomeu.vizoso@collabora.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org This callback is expected to do the same as enter() only that all non-wakeup IRQs are expected to be disabled. It will be called when the system goes to suspend-to-idle and will reduce power usage because CPUs won't be awaken for unnecessary IRQs. Signed-off-by: Tomeu Vizoso Cc: Rafael J. Wysocki --- arch/arm/mach-tegra/cpuidle-tegra114.c | 31 ++++++++++++++++++++++++------- 1 file changed, 24 insertions(+), 7 deletions(-) diff --git a/arch/arm/mach-tegra/cpuidle-tegra114.c b/arch/arm/mach-tegra/cpuidle-tegra114.c index f2b586d..ef06001 100644 --- a/arch/arm/mach-tegra/cpuidle-tegra114.c +++ b/arch/arm/mach-tegra/cpuidle-tegra114.c @@ -39,28 +39,44 @@ static int tegra114_idle_power_down(struct cpuidle_device *dev, struct cpuidle_driver *drv, int index) { - local_fiq_disable(); - tegra_set_cpu_in_lp2(); cpu_pm_enter(); - clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_ENTER, &dev->cpu); - call_firmware_op(prepare_idle); /* Do suspend by ourselves if the firmware does not implement it */ if (call_firmware_op(do_idle, 0) == -ENOSYS) cpu_suspend(0, tegra30_sleep_cpu_secondary_finish); - clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_EXIT, &dev->cpu); - cpu_pm_exit(); tegra_clear_cpu_in_lp2(); + return index; +} + +static int tegra114_idle_enter(struct cpuidle_device *dev, + struct cpuidle_driver *drv, + int index) +{ + local_fiq_disable(); + + clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_ENTER, &dev->cpu); + + index = tegra114_idle_power_down(dev, drv, index); + + clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_EXIT, &dev->cpu); + local_fiq_enable(); return index; } + +static void tegra114_idle_enter_freeze(struct cpuidle_device *dev, + struct cpuidle_driver *drv, + int index) +{ + tegra114_idle_power_down(dev, drv, index); +} #endif static struct cpuidle_driver tegra_idle_driver = { @@ -71,7 +87,8 @@ static struct cpuidle_driver tegra_idle_driver = { [0] = ARM_CPUIDLE_WFI_STATE_PWR(600), #ifdef CONFIG_PM_SLEEP [1] = { - .enter = tegra114_idle_power_down, + .enter = tegra114_idle_enter, + .enter_freeze = tegra114_idle_enter_freeze, .exit_latency = 500, .target_residency = 1000, .power_usage = 0, -- 2.3.4