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| author | Joseph Lo <josephl@nvidia.com> | 2013-07-19 13:25:25 +0400 |
|---|---|---|
| committer | Stephen Warren <swarren@nvidia.com> | 2013-07-19 20:07:14 +0400 |
| commit | 1b9e6b2745621984b4aad49b0386814815fb15e7 (patch) | |
| tree | 3b258ce7b8cdfe8cfb3c06d120bbba4dbedfcf70 /arch/arm/mach-tegra/sleep-tegra30.S | |
| parent | 7e8b15dbc392cf3097f2d2e6dfbbf2e97318c553 (diff) | |
| download | linux-1b9e6b2745621984b4aad49b0386814815fb15e7.tar.xz | |
ARM: tegra114: add low level support for CPU idle powered-down mode
The flow controller would take care the power sequence when CPU idle in
powered-down mode. It powered gate the CPU when CPU runs into WFI
instruction. And wake up the CPU when event be triggered.
The sequence is below.
* setting wfi bitmap for the CPU as the halt event in the
FLOW_CTRL_CPU_HALT_REG to monitor the CPU running into WFI,then power
gate it
* setting IRQ and FIQ as wake up event to wake up CPU when event triggered
Signed-off-by: Joseph Lo <josephl@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Diffstat (limited to 'arch/arm/mach-tegra/sleep-tegra30.S')
| -rw-r--r-- | arch/arm/mach-tegra/sleep-tegra30.S | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/sleep-tegra30.S b/arch/arm/mach-tegra/sleep-tegra30.S index ada8821b48be..5877f268fa97 100644 --- a/arch/arm/mach-tegra/sleep-tegra30.S +++ b/arch/arm/mach-tegra/sleep-tegra30.S @@ -99,6 +99,8 @@ flow_ctrl_setting_for_lp2: cmp r10, #TEGRA30 moveq r3, #FLOW_CTRL_WAIT_FOR_INTERRUPT @ For LP2 movne r3, #FLOW_CTRL_WAITEVENT + orrne r3, r3, #FLOW_CTRL_HALT_GIC_IRQ + orrne r3, r3, #FLOW_CTRL_HALT_GIC_FIQ flow_ctrl_done: cmp r10, #TEGRA30 str r3, [r2] |