From 338f2aadca7ed4e30e5937fdebc3ff72fda210b6 Mon Sep 17 00:00:00 2001 From: Alexandre Courbot <acourbot@nvidia.com> Date: Wed, 12 Feb 2014 11:43:44 +0900 Subject: [PATCH] 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> --- arch/arm/mach-tegra/cpuidle-tegra114.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) 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); -- 2.20.1