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Date: Tue, 18 Mar 2014 10:33:56 +0800 From: Wenyou Yang <wenyou.yang@...el.com> To: <linux@...im.org.za>, <nicolas.ferre@...el.com>, <linux@....linux.org.uk> CC: <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>, <wenyou.yang@...el.com> Subject: [PATCH 2/3] ARM: at91: pm_slowclock: add enter standby mode for ARMv7 Signed-off-by: Wenyou Yang <wenyou.yang@...el.com> --- arch/arm/mach-at91/pm_slowclock.S | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/arch/arm/mach-at91/pm_slowclock.S b/arch/arm/mach-at91/pm_slowclock.S index 2001877..842ddaf 100644 --- a/arch/arm/mach-at91/pm_slowclock.S +++ b/arch/arm/mach-at91/pm_slowclock.S @@ -102,6 +102,20 @@ tmp2 .req r5 2: .endm +/* + * Put the processor to enter into Standby mode, wait for interrupt to wakeup + */ + .macro _do_wfi + +#if defined(CONFIG_CPU_V7) + dsb + wfi @ Wait For Interrupt +#else + mcr p15, 0, tmp1, c7, c0, 4 +#endif + + .endm + .text /* void at91_slow_clock(void __iomem *pmc, void __iomem *sdramc, @@ -220,7 +234,7 @@ sdr_sr_done: str tmp1, [pmc, #AT91_CKGR_MOR] /* Wait for interrupt */ - mcr p15, 0, tmp1, c7, c0, 4 + _do_wfi /* Turn on the main oscillator */ ldr tmp1, [pmc, #AT91_CKGR_MOR] -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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