Messages in this thread Patch in this message | | | From | Alexandre Courbot <> | Subject | [PATCH v2 6/6] ARM: tegra: cpuidle: use firmware for power down | Date | Fri, 7 Feb 2014 13:35:06 +0900 |
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Attempt to invoke the prepare_idle() and do_idle() firmware calls to power down a CPU so an underlying firmware gets informed of the idle operation and performs it by itself if designed in such a way.
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com> --- arch/arm/mach-tegra/cpuidle-tegra114.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/arch/arm/mach-tegra/cpuidle-tegra114.c b/arch/arm/mach-tegra/cpuidle-tegra114.c index e0b87300243d..558067ddc186 100644 --- a/arch/arm/mach-tegra/cpuidle-tegra114.c +++ b/arch/arm/mach-tegra/cpuidle-tegra114.c @@ -19,6 +19,7 @@ #include <linux/cpuidle.h> #include <linux/cpu_pm.h> #include <linux/clockchips.h> +#include <asm/firmware.h> #include <asm/cpuidle.h> #include <asm/suspend.h> @@ -45,7 +46,15 @@ static int tegra114_idle_power_down(struct cpuidle_device *dev, clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_ENTER, &dev->cpu); - cpu_suspend(0, tegra30_sleep_cpu_secondary_finish); + call_firmware_op(prepare_idle); + + switch (call_firmware_op(do_idle)) { + case -ENOSYS: + cpu_suspend(0, tegra30_sleep_cpu_secondary_finish); + break; + default: + break; + } clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_EXIT, &dev->cpu); -- 1.8.5.3
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