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irqchip: omap-intc: enable TURBO idle mode

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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@lakedaemon.net>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Felipe Balbi 2014-09-15 16:15:07 -05:00 committed by Tony Lindgren
parent 9836ee9f87
commit b30791498a
1 changed files with 5 additions and 0 deletions
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5
drivers/irqchip/irq-omap-intc.c
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@ -51,6 +51,9 @@
#define INTCPS_NR_ILR_REGS 128 #define INTCPS_NR_ILR_REGS 128
#define INTCPS_NR_MIR_REGS 3 #define INTCPS_NR_MIR_REGS 3
#define INTC_IDLE_FUNCIDLE (1 << 0)
#define INTC_IDLE_TURBO (1 << 1)
#define INTC_PROTECTION_ENABLE (1 << 0) #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) * cf. errata ID i540 for 3430 (all revisions up to 3.1.x)
*/ */
intc_writel(INTC_SYSCONFIG, 0); intc_writel(INTC_SYSCONFIG, 0);
intc_writel(INTC_IDLE, INTC_IDLE_TURBO);
} }
void omap3_intc_resume_idle(void) void omap3_intc_resume_idle(void)
{ {
/* Re-enable autoidle */ /* Re-enable autoidle */
intc_writel(INTC_SYSCONFIG, 1); intc_writel(INTC_SYSCONFIG, 1);
intc_writel(INTC_IDLE, 0);
} }
/* XXX: FIQ and additional INTC support (only MPU at the moment) */ /* XXX: FIQ and additional INTC support (only MPU at the moment) */