ARM: tegra30: flowctrl: add cpu_suspend_exter/exit function

The flow controller can help CPU to go into suspend mode (powered-down
state). When CPU go 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.

Signed-off-by: Joseph Lo <josephl@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/arch/arm/mach-tegra/flowctrl.h b/arch/arm/mach-tegra/flowctrl.h
index 19428173855e..0798dec1832d 100644
--- a/arch/arm/mach-tegra/flowctrl.h
+++ b/arch/arm/mach-tegra/flowctrl.h
@@ -34,9 +34,17 @@
 #define FLOW_CTRL_HALT_CPU1_EVENTS      0x14
 #define FLOW_CTRL_CPU1_CSR              0x18
 
+#define TEGRA30_FLOW_CTRL_CSR_WFI_CPU0          (1 << 8)
+#define TEGRA30_FLOW_CTRL_CSR_WFE_BITMAP        (0xF << 4)
+#define TEGRA30_FLOW_CTRL_CSR_WFI_BITMAP        (0xF << 8)
+
 #ifndef __ASSEMBLY__
+u32 flowctrl_read_cpu_csr(unsigned int cpuid);
 void flowctrl_write_cpu_csr(unsigned int cpuid, u32 value);
 void flowctrl_write_cpu_halt(unsigned int cpuid, u32 value);
+
+void flowctrl_cpu_suspend_enter(unsigned int cpuid);
+void flowctrl_cpu_suspend_exit(unsigned int cpuid);
 #endif
 
 #endif