@@ -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)
@@ -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]
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> --- V3: * no change V2: * no change --- arch/arm/mach-tegra/flowctrl.h | 2 ++ arch/arm/mach-tegra/sleep-tegra30.S | 2 ++ 2 files changed, 4 insertions(+)