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| author | Joseph Lo <josephl@nvidia.com> | 2013-07-19 11:25:25 +0200 |
|---|---|---|
| committer | Stephen Warren <swarren@nvidia.com> | 2013-07-19 18:07:14 +0200 |
| commit | 1b9e6b2745621984b4aad49b0386814815fb15e7 (patch) | |
| tree | 3b258ce7b8cdfe8cfb3c06d120bbba4dbedfcf70 /arch/arm/mach-tegra/flowctrl.h | |
| parent | ARM: tegra114: Reprogram GIC CPU interface to bypass IRQ on CPU PM entry (diff) | |
| download | linux-1b9e6b2745621984b4aad49b0386814815fb15e7.tar.xz linux-1b9e6b2745621984b4aad49b0386814815fb15e7.zip | |
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/flowctrl.h')
| -rw-r--r-- | arch/arm/mach-tegra/flowctrl.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/flowctrl.h b/arch/arm/mach-tegra/flowctrl.h index 7a29bae799a7..e56a950920f6 100644 --- a/arch/arm/mach-tegra/flowctrl.h +++ b/arch/arm/mach-tegra/flowctrl.h @@ -28,6 +28,8 @@ #define FLOW_CTRL_SCLK_RESUME (1 << 27) #define FLOW_CTRL_HALT_CPU_IRQ (1 << 10) #define FLOW_CTRL_HALT_CPU_FIQ (1 << 8) +#define FLOW_CTRL_HALT_GIC_IRQ (1 << 9) +#define FLOW_CTRL_HALT_GIC_FIQ (1 << 8) #define FLOW_CTRL_CPU0_CSR 0x8 #define FLOW_CTRL_CSR_INTR_FLAG (1 << 15) #define FLOW_CTRL_CSR_EVENT_FLAG (1 << 14) |