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ARM: tegra: flowctrl: add support for cpu_suspend_enter/exit

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The flow controller can help CPU to go into suspend mode (powered-down
state). When CPU goes into powered-down state, it needs some careful
settings before getting into and after leaving. The enter and exit
functions do that by configuring appropriate mode for flow controller.

For Tegra114, the setting is compatible with Tegra30.

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 17:50:43 +08:00 committed by Stephen Warren
parent b573ad9f19
commit dd6fe9a927
1 changed files with 2 additions and 0 deletions
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2
arch/arm/mach-tegra/flowctrl.c
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@ -86,6 +86,7 @@ void flowctrl_cpu_suspend_enter(unsigned int cpuid)
reg |= TEGRA20_FLOW_CTRL_CSR_WFE_CPU0 << cpuid;
break;
case TEGRA30:
case TEGRA114:
/* clear wfe bitmap */
reg &= ~TEGRA30_FLOW_CTRL_CSR_WFE_BITMAP;
/* clear wfi bitmap */
@ -123,6 +124,7 @@ void flowctrl_cpu_suspend_exit(unsigned int cpuid)
reg &= ~TEGRA20_FLOW_CTRL_CSR_WFI_BITMAP;
break;
case TEGRA30:
case TEGRA114:
/* clear wfe bitmap */
reg &= ~TEGRA30_FLOW_CTRL_CSR_WFE_BITMAP;
/* clear wfi bitmap */