From b30791498a140d9460dfb9cb8edcb6fd1065363c Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Mon, 15 Sep 2014 16:15:07 -0500 Subject: [PATCH] irqchip: omap-intc: enable TURBO idle mode 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 Signed-off-by: Felipe Balbi Signed-off-by: Tony Lindgren --- 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 7681b1329976..dfa2d9de5361 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) */ -- 2.20.1