Merge tag 'tegra-for-3.9-soc-cpuidle' of git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra into next/soc

From Stephen Warren:
ARM: tegra: cpuidle enhancements

This pull request implements a new "LP2" cpuidle state for Tegra20,
which makes use of the couple cpuidle feature.

It is based on (most of) the previous pull request, with tag
tegra-for-3.9-soc-usb.

* tag 'tegra-for-3.9-soc-cpuidle' of git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra:
  ARM: tegra20: cpuidle: apply coupled cpuidle for powered-down mode
  ARM: tegra20: flowctrl: add support for cpu_suspend_enter/exit
  clk: tegra20: Implementing CPU low-power function for tegra_cpu_car_ops
  ARM: tegra20: cpuidle: add powered-down state for secondary CPU
  ARM: tegra: add pending SGI checking API

Signed-off-by: Olof Johansson <olof@lixom.net>

1 files changed, 15 insertions, 0 deletions

diff --git a/arch/arm/mach-tegra/irq.c b/arch/arm/mach-tegra/irq.c
index 2ff2128cb9d8..1952e82797cc 100644
--- a/arch/arm/mach-tegra/irq.c
+++ b/arch/arm/mach-tegra/irq.c
@@ -44,6 +44,8 @@
 
 #define FIRST_LEGACY_IRQ 32
 
+#define SGI_MASK 0xFFFF
+
 static int num_ictlrs;
 
 static void __iomem *ictlr_reg_base[] = {
@@ -54,6 +56,19 @@ static void __iomem *ictlr_reg_base[] = {
 	IO_ADDRESS(TEGRA_QUINARY_ICTLR_BASE),
 };
 
+bool tegra_pending_sgi(void)
+{
+	u32 pending_set;
+	void __iomem *distbase = IO_ADDRESS(TEGRA_ARM_INT_DIST_BASE);
+
+	pending_set = readl_relaxed(distbase + GIC_DIST_PENDING_SET);
+
+	if (pending_set & SGI_MASK)
+		return true;
+
+	return false;
+}
+
 static inline void tegra_irq_write_mask(unsigned int irq, unsigned long reg)
 {
 	void __iomem *base;