When TURBO bit is set in the INTC_IDLE register,
the input synchronizer clock will be autogated
based on activity on the INTC.
Because this idle mode increases the interrupt
latency by 2 clock cycles, we're only enabling
it during suspend.
Acked-by: Jason Cooper <jason@xxxxxxxxxxxxxx>
Signed-off-by: Felipe Balbi <balbi@xxxxxx>
---
Tony, let me know if you want TURBO to be set unconditionally. That's likely
going to shave off a few extra microwatts, although I don't have a good way to
measure it.
drivers/irqchip/irq-omap-intc.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/irqchip/irq-omap-intc.c b/drivers/irqchip/irq-omap-intc.c
index 7681b13..dfa2d9d 100644
--- a/drivers/irqchip/irq-omap-intc.c
+++ b/drivers/irqchip/irq-omap-intc.c
@@ -51,6 +51,9 @@
#define INTCPS_NR_ILR_REGS 128
#define INTCPS_NR_MIR_REGS 3
+#define INTC_IDLE_FUNCIDLE (1 << 0)
+#define INTC_IDLE_TURBO (1 << 1)
+
#define INTC_PROTECTION_ENABLE (1 << 0)
/*
@@ -134,12 +137,14 @@ void omap3_intc_prepare_idle(void)
* cf. errata ID i540 for 3430 (all revisions up to 3.1.x)
*/
intc_writel(INTC_SYSCONFIG, 0);
+ intc_writel(INTC_IDLE, INTC_IDLE_TURBO);
}
void omap3_intc_resume_idle(void)
{
/* Re-enable autoidle */
intc_writel(INTC_SYSCONFIG, 1);
+ intc_writel(INTC_IDLE, 0);
}
/* XXX: FIQ and additional INTC support (only MPU at the moment) */
--
2.0.1.563.g66f467c
--
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