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 <[email protected]> Signed-off-by: Felipe Balbi <[email protected]> --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
