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| author |   Alexandre Courbot <acourbot@nvidia.com> | 2014-02-12 11:43:44 +0900 |
|---|---|---|
| committer |   Stephen Warren <swarren@nvidia.com> | 2014-02-18 13:46:50 -0700 |
| commit | 338f2aadca7ed4e30e5937fdebc3ff72fda210b6 (patch) | |
| tree | 54e4abec04b0da3250d8055ee7a8c68a93f0a755 /arch/arm/mach-tegra/cpuidle-tegra114.c | |
| parent | ARM: trusted_foundations: implement prepare_idle() (diff) | |
| download | linux-dev-338f2aadca7ed4e30e5937fdebc3ff72fda210b6.tar.xz linux-dev-338f2aadca7ed4e30e5937fdebc3ff72fda210b6.zip | |
ARM: tegra: cpuidle: use firmware for power down
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>
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Diffstat (limited to 'arch/arm/mach-tegra/cpuidle-tegra114.c')
| -rw-r--r-- | arch/arm/mach-tegra/cpuidle-tegra114.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/arm/mach-tegra/cpuidle-tegra114.c b/arch/arm/mach-tegra/cpuidle-tegra114.c index e0b87300243d..b5fb7c110c64 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 +46,11 @@ 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); + + /* Do suspend by ourselves if the firmware does not implement it */ + if (call_firmware_op(do_idle) == -ENOSYS) + cpu_suspend(0, tegra30_sleep_cpu_secondary_finish); clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_EXIT, &dev->cpu); |