From 1b9e6b2745621984b4aad49b0386814815fb15e7 Mon Sep 17 00:00:00 2001 From: Joseph Lo Date: Fri, 19 Jul 2013 17:25:25 +0800 Subject: 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 Signed-off-by: Stephen Warren --- arch/arm/mach-tegra/sleep-tegra30.S | 2 ++ 1 file changed, 2 insertions(+) (limited to 'arch/arm/mach-tegra/sleep-tegra30.S') 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] -- cgit