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ARM: tegra: add low level code for Tegra114 cluster power down 

When the CPU cluster power down, the vGIC is powered down too. The
flow controller needs to monitor the legacy interrupt controller to
wake up CPU. So setting up the appropriate wake up event in flow
controller.

Signed-off-by: Joseph Lo <josephl@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
This commit is contained in:
Joseph Lo 2013-07-03 17:50:40 +08:00 committed by Stephen Warren
parent 2f5aaa3d27
commit ccea4bc654
2 changed files with 7 additions and 1 deletions
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2
arch/arm/mach-tegra/flowctrl.h
View File

@ -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_LIC_IRQ (1 << 11)
#define FLOW_CTRL_HALT_LIC_FIQ (1 << 10)
#define FLOW_CTRL_HALT_GIC_IRQ (1 << 9)
#define FLOW_CTRL_HALT_GIC_FIQ (1 << 8)
#define FLOW_CTRL_CPU0_CSR 0x8

6
arch/arm/mach-tegra/sleep-tegra30.S
View File

@ -175,8 +175,12 @@ tegra30_enter_sleep:
orr r0, r0, #FLOW_CTRL_CSR_ENABLE
str r0, [r6, r2]
tegra_get_soc_id TEGRA_APB_MISC_BASE, r10
cmp r10, #TEGRA30
mov r0, #FLOW_CTRL_WAIT_FOR_INTERRUPT
orr r0, r0, #FLOW_CTRL_HALT_CPU_IRQ | FLOW_CTRL_HALT_CPU_FIQ
orreq r0, r0, #FLOW_CTRL_HALT_CPU_IRQ | FLOW_CTRL_HALT_CPU_FIQ
orrne r0, r0, #FLOW_CTRL_HALT_LIC_IRQ | FLOW_CTRL_HALT_LIC_FIQ
cpu_to_halt_reg r2, r1
str r0, [r6, r2]
dsb